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binutils-gdb/gdb/ppc64-tdep.c

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Add missing file from the previous commit.
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/* Common target-dependent code for ppc64 GDB, the GNU debugger.
Update copyright year range in header of all files managed by GDB This commit is the result of the following actions: - Running gdb/copyright.py to update all of the copyright headers to include 2024, - Manually updating a few files the copyright.py script told me to update, these files had copyright headers embedded within the file, - Regenerating gdbsupport/Makefile.in to refresh it's copyright date, - Using grep to find other files that still mentioned 2023. If these files were updated last year from 2022 to 2023 then I've updated them this year to 2024. I'm sure I've probably missed some dates. Feel free to fix them up as you spot them.
2024-01-12 23:30:44 +08:00
Copyright (C) 1986-2024 Free Software Foundation, Inc.
Add missing file from the previous commit.
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This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
gdb: move store/extract integer functions to extract-store-integer.{c,h} Move the declarations out of defs.h, and the implementations out of findvar.c. I opted for a new file, because this functionality of converting integers to bytes and vice-versa seems a bit to generic to live in findvar.c. Change-Id: I524858fca33901ee2150c582bac16042148d2251 Approved-By: John Baldwin <jhb@FreeBSD.org>
2024-04-23 04:10:14 +08:00
#include "extract-store-integer.h"
Add missing file from the previous commit.
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#include "frame.h"
#include "gdbcore.h"
Skip-trampoline for PowerPC reverse-stepping.
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#include "infrun.h"
Add missing file from the previous commit.
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#include "ppc-tdep.h"
#include "ppc64-tdep.h"
* elfread.c (elf_symtab_read): Do not use udata.p here to find symbol size. * ppc64-tdep.c (ppc64_elf_make_msymbol_special): New function. * ppc64-tdep.h (ppc64_elf_make_msymbol_special): Declare. * ppc-linux-tdep.c (ppc_linux_init_abi): Set up to use the above. * ppcfbsd-tdep.c (ppcfbsd_init_abi): Likewise.
2013-02-23 07:24:24 +08:00
#include "elf-bfd.h"
Add missing file from the previous commit.
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/* Macros for matching instructions. Note that, since all the
operands are masked off before they're or-ed into the instruction,
you can use -1 to make masks. */
#define insn_d(opcd, rts, ra, d) \
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
((((unsigned (opcd)) & 0x3f) << 26) \
| (((unsigned (rts)) & 0x1f) << 21) \
| (((unsigned (ra)) & 0x1f) << 16) \
| ((unsigned (d)) & 0xffff))
Add missing file from the previous commit.
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#define insn_ds(opcd, rts, ra, d, xo) \
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
((((unsigned (opcd)) & 0x3f) << 26) \
| (((unsigned (rts)) & 0x1f) << 21) \
| (((unsigned (ra)) & 0x1f) << 16) \
| ((unsigned (d)) & 0xfffc) \
| ((unsigned (xo)) & 0x3))
Add missing file from the previous commit.
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#define insn_xfx(opcd, rts, spr, xo) \
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
((((unsigned (opcd)) & 0x3f) << 26) \
| (((unsigned (rts)) & 0x1f) << 21) \
| (((unsigned (spr)) & 0x1f) << 16) \
| (((unsigned (spr)) & 0x3e0) << 6) \
| (((unsigned (xo)) & 0x3ff) << 1))
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
#define prefix(a, b, R, do) \
(((0x1) << 26) \
| (((unsigned (a)) & 0x3) << 24) \
| (((unsigned (b)) & 0x1) << 23) \
| (((unsigned (R)) & 0x1) << 20) \
| ((unsigned (do)) & 0x3ffff))
#define insn_md(opcd, ra, rs, sh, me, rc) \
((((unsigned (opcd)) & 0x3f) << 26) \
| (((unsigned (rs)) & 0x1f) << 21) \
| (((unsigned (ra)) & 0x1f) << 16) \
| (((unsigned (sh)) & 0x3e) << 11) \
| (((unsigned (me)) & 0x3f) << 25) \
| (((unsigned (sh)) & 0x1) << 1) \
| ((unsigned (rc)) & 0x1))
#define insn_x(opcd, rt, ra, rb, opc2) \
((((unsigned (opcd)) & 0x3f) << 26) \
| (((unsigned (rt)) & 0x1f) << 21) \
| (((unsigned (ra)) & 0x1f) << 16) \
| (((unsigned (rb)) & 0x3e) << 11) \
| (((unsigned (opc2)) & 0x3FF) << 1))
#define insn_xo(opcd, rt, ra, rb, oe, rc, opc2) \
((((unsigned (opcd)) & 0x3f) << 26) \
| (((unsigned (rt)) & 0x1f) << 21) \
| (((unsigned (ra)) & 0x1f) << 16) \
| (((unsigned (rb)) & 0x3e) << 11) \
| (((unsigned (oe)) & 0x1) << 10) \
| (((unsigned (opc2)) & 0x1FF) << 1) \
| (((unsigned (rc)))))
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
/* PLT_OFF is the TOC-relative offset of a 64-bit PowerPC PLT entry.
Return the function's entry point. */
Add missing file from the previous commit.
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static CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_plt_entry_point (const frame_info_ptr &frame, CORE_ADDR plt_off)
Add missing file from the previous commit.
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{
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
struct gdbarch *gdbarch = get_frame_arch (frame);
Add missing file from the previous commit.
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb: move the type cast into gdbarch_tdep I built GDB for all targets on a x86-64/GNU-Linux system, and then (accidentally) passed GDB a RISC-V binary, and asked GDB to "run" the binary on the native target. I got this error: (gdb) show architecture The target architecture is set to "auto" (currently "i386"). (gdb) file /tmp/hello.rv32.exe Reading symbols from /tmp/hello.rv32.exe... (gdb) show architecture The target architecture is set to "auto" (currently "riscv:rv32"). (gdb) run Starting program: /tmp/hello.rv32.exe ../../src/gdb/i387-tdep.c:596: internal-error: i387_supply_fxsave: Assertion `tdep->st0_regnum >= I386_ST0_REGNUM' failed. What's going on here is this; initially the architecture is i386, this is based on the default architecture, which is set based on the native target. After loading the RISC-V executable the architecture of the current inferior is updated based on the architecture of the executable. When we "run", GDB does a fork & exec, with the inferior being controlled through ptrace. GDB sees an initial stop from the inferior as soon as the inferior comes to life. In response to this stop GDB ends up calling save_stop_reason (linux-nat.c), which ends up trying to read register from the inferior, to do this we end up calling target_ops::fetch_registers, which, for the x86-64 native target, calls amd64_linux_nat_target::fetch_registers. After this I eventually end up in i387_supply_fxsave, different x86 based targets will end in different functions to fetch registers, but it doesn't really matter which function we end up in, the problem is this line, which is repeated in many places: i386_gdbarch_tdep *tdep = (i386_gdbarch_tdep *) gdbarch_tdep (arch); The problem here is that the ARCH in this line comes from the current inferior, which, as we discussed above, will be a RISC-V gdbarch, the tdep field will actually be of type riscv_gdbarch_tdep, not i386_gdbarch_tdep. After this cast we are relying on undefined behaviour, in my case I happen to trigger an assert, but this might not always be the case. The thing I tried that exposed this problem was of course, trying to start an executable of the wrong architecture on a native target. I don't think that the correct solution for this problem is to detect, at the point of cast, that the gdbarch_tdep object is of the wrong type, but, I did wonder, is there a way that we could protect ourselves from incorrectly casting the gdbarch_tdep object? I think that there is something we can do here, and this commit is the first step in that direction, though no actual check is added by this commit. This commit can be split into two parts: (1) In gdbarch.h and arch-utils.c. In these files I have modified gdbarch_tdep (the function) so that it now takes a template argument, like this: template<typename TDepType> static inline TDepType * gdbarch_tdep (struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep_1 (gdbarch); return static_cast<TDepType *> (tdep); } After this change we are no better protected, but the cast is now done within the gdbarch_tdep function rather than at the call sites, this leads to the second, much larger change in this commit, (2) Everywhere gdbarch_tdep is called, we make changes like this: - i386_gdbarch_tdep *tdep = (i386_gdbarch_tdep *) gdbarch_tdep (arch); + i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (arch); There should be no functional change after this commit. In the next commit I will build on this change to add an assertion in gdbarch_tdep that checks we are casting to the correct type.
2022-05-19 20:20:17 +08:00
ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
CORE_ADDR tocp;
if (execution_direction == EXEC_REVERSE)
{
/* If executing in reverse, r2 will have been stored to the stack. */
CORE_ADDR sp = get_frame_register_unsigned (frame,
tdep->ppc_gp0_regnum + 1);
unsigned int sp_off = tdep->elf_abi == POWERPC_ELF_V1 ? 40 : 24;
tocp = read_memory_unsigned_integer (sp + sp_off, 8, byte_order);
}
else
tocp = get_frame_register_unsigned (frame, tdep->ppc_gp0_regnum + 2);
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* The first word of the PLT entry is the function entry point. */
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
return read_memory_unsigned_integer (tocp + plt_off, 8, byte_order);
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
}
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
static CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_plt_pcrel_entry_point (const frame_info_ptr &frame, CORE_ADDR plt_off,
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
CORE_ADDR pc)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* Execution direction doesn't matter, entry is pc + plt_off either way.
The first word of the PLT entry is the function entry point. */
return read_memory_unsigned_integer (pc + plt_off, 8, byte_order);
}
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* Patterns for the standard linkage functions. These are built by
build_plt_stub in bfd/elf64-ppc.c. */
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* Old ELFv1 PLT call stub. */
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
PowerPC PLT stub matching This patch fixes a number of bugs in ppc32 plt stub matching code. 1) The 4-insn stubs for shared libs and PIEs weren't matched. 2) The executable stub miscalculated PLT entry address (by oring a sign-extended quantity rather than adding). 3) Comments were not accurate. In addition, the insn arrays are made const. * ppc-linux-tdep.c (powerpc32_plt_stub): Make const. (powerpc32_plt_stub_so_1): Rename from powerpc32_plt_stub_so. Remove nop. Make const. Comment. (powerpc32_plt_stub_so_2): New. (POWERPC32_PLT_CHECK_LEN): Rename from POWERPC32_PLT_STUB_LEN. Correct count. Update uses. (ppc_skip_trampoline_code): Match powerpc32_plt_stub_so_2 too. Move common code reading PLT entry word. Correct powerpc32_plt_stub PLT address calculation. * ppc64-tdep.c (ppc64_standard_linkage1): Make const. (ppc64_standard_linkage2, ppc64_standard_linkage3): Likewise. (ppc64_standard_linkage4, ppc64_standard_linkage5): Likewise. (ppc64_standard_linkage6, ppc64_standard_linkage7): Likewise. (ppc64_standard_linkage8): Likewise. * rs6000-tdep.c (ppc_insns_match_pattern): Make pattern const. Correct insns description. * ppc-tdep.h (ppc_insns_match_pattern): Update prototype. Reviewed-By: Yao Qi <qiyaoltc@gmail.com>
2018-01-24 12:52:17 +08:00
static const struct ppc_insn_pattern ppc64_standard_linkage1[] =
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
{
/* addis r12, r2, <any> */
{ insn_d (-1, -1, -1, 0), insn_d (15, 12, 2, 0), 0 },
/* std r2, 40(r1) */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, insn_ds (62, 2, 1, 40, 0), 0 },
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* ld r11, <any>(r12) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 12, 0, 0), 0 },
/* addis r12, r12, 1 <optional> */
{ insn_d (-1, -1, -1, -1), insn_d (15, 12, 12, 1), 1 },
/* ld r2, <any>(r12) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 2, 12, 0, 0), 0 },
/* addis r12, r12, 1 <optional> */
{ insn_d (-1, -1, -1, -1), insn_d (15, 12, 12, 1), 1 },
/* mtctr r11 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 11, 9, 467), 0 },
/* ld r11, <any>(r12) <optional> */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 12, 0, 0), 1 },
/* bctr */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x4e800420, 0 },
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
{ 0, 0, 0 }
};
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* ELFv1 PLT call stub to access PLT entries more than +/- 32k from r2.
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
Also supports older stub with different placement of std 2,40(1),
a stub that omits the std 2,40(1), and both versions of power7
thread safety read barriers. Note that there are actually two more
instructions following "cmpldi r2, 0", "bnectr+" and "b <glink_i>",
but there isn't any need to match them. */
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
PowerPC PLT stub matching This patch fixes a number of bugs in ppc32 plt stub matching code. 1) The 4-insn stubs for shared libs and PIEs weren't matched. 2) The executable stub miscalculated PLT entry address (by oring a sign-extended quantity rather than adding). 3) Comments were not accurate. In addition, the insn arrays are made const. * ppc-linux-tdep.c (powerpc32_plt_stub): Make const. (powerpc32_plt_stub_so_1): Rename from powerpc32_plt_stub_so. Remove nop. Make const. Comment. (powerpc32_plt_stub_so_2): New. (POWERPC32_PLT_CHECK_LEN): Rename from POWERPC32_PLT_STUB_LEN. Correct count. Update uses. (ppc_skip_trampoline_code): Match powerpc32_plt_stub_so_2 too. Move common code reading PLT entry word. Correct powerpc32_plt_stub PLT address calculation. * ppc64-tdep.c (ppc64_standard_linkage1): Make const. (ppc64_standard_linkage2, ppc64_standard_linkage3): Likewise. (ppc64_standard_linkage4, ppc64_standard_linkage5): Likewise. (ppc64_standard_linkage6, ppc64_standard_linkage7): Likewise. (ppc64_standard_linkage8): Likewise. * rs6000-tdep.c (ppc_insns_match_pattern): Make pattern const. Correct insns description. * ppc-tdep.h (ppc_insns_match_pattern): Update prototype. Reviewed-By: Yao Qi <qiyaoltc@gmail.com>
2018-01-24 12:52:17 +08:00
static const struct ppc_insn_pattern ppc64_standard_linkage2[] =
Add missing file from the previous commit.
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{
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* std r2, 40(r1) <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, insn_ds (62, 2, 1, 40, 0), 1 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* addis r12, r2, <any> */
{ insn_d (-1, -1, -1, 0), insn_d (15, 12, 2, 0), 0 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* std r2, 40(r1) <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, insn_ds (62, 2, 1, 40, 0), 1 },
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* ld r11, <any>(r12) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 12, 0, 0), 0 },
/* addi r12, r12, <any> <optional> */
{ insn_d (-1, -1, -1, 0), insn_d (14, 12, 12, 0), 1 },
/* mtctr r11 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 11, 9, 467), 0 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* xor r11, r11, r11 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x7d6b5a78, 1 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* add r12, r12, r11 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x7d8c5a14, 1 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* ld r2, <any>(r12) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 2, 12, 0, 0), 0 },
/* ld r11, <any>(r12) <optional> */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 12, 0, 0), 1 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* bctr <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
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{ (unsigned) -1, 0x4e800420, 1 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* cmpldi r2, 0 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x28220000, 1 },
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
{ 0, 0, 0 }
};
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* ELFv1 PLT call stub to access PLT entries within +/- 32k of r2. */
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
PowerPC PLT stub matching This patch fixes a number of bugs in ppc32 plt stub matching code. 1) The 4-insn stubs for shared libs and PIEs weren't matched. 2) The executable stub miscalculated PLT entry address (by oring a sign-extended quantity rather than adding). 3) Comments were not accurate. In addition, the insn arrays are made const. * ppc-linux-tdep.c (powerpc32_plt_stub): Make const. (powerpc32_plt_stub_so_1): Rename from powerpc32_plt_stub_so. Remove nop. Make const. Comment. (powerpc32_plt_stub_so_2): New. (POWERPC32_PLT_CHECK_LEN): Rename from POWERPC32_PLT_STUB_LEN. Correct count. Update uses. (ppc_skip_trampoline_code): Match powerpc32_plt_stub_so_2 too. Move common code reading PLT entry word. Correct powerpc32_plt_stub PLT address calculation. * ppc64-tdep.c (ppc64_standard_linkage1): Make const. (ppc64_standard_linkage2, ppc64_standard_linkage3): Likewise. (ppc64_standard_linkage4, ppc64_standard_linkage5): Likewise. (ppc64_standard_linkage6, ppc64_standard_linkage7): Likewise. (ppc64_standard_linkage8): Likewise. * rs6000-tdep.c (ppc_insns_match_pattern): Make pattern const. Correct insns description. * ppc-tdep.h (ppc_insns_match_pattern): Update prototype. Reviewed-By: Yao Qi <qiyaoltc@gmail.com>
2018-01-24 12:52:17 +08:00
static const struct ppc_insn_pattern ppc64_standard_linkage3[] =
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
{
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* std r2, 40(r1) <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, insn_ds (62, 2, 1, 40, 0), 1 },
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* ld r11, <any>(r2) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 2, 0, 0), 0 },
/* addi r2, r2, <any> <optional> */
{ insn_d (-1, -1, -1, 0), insn_d (14, 2, 2, 0), 1 },
/* mtctr r11 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 11, 9, 467), 0 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* xor r11, r11, r11 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x7d6b5a78, 1 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* add r2, r2, r11 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x7c425a14, 1 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* ld r11, <any>(r2) <optional> */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 2, 0, 0), 1 },
/* ld r2, <any>(r2) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 2, 2, 0, 0), 0 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* bctr <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x4e800420, 1 },
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
/* cmpldi r2, 0 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x28220000, 1 },
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
{ 0, 0, 0 }
};
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* ELFv1 PLT call stub to access PLT entries more than +/- 32k from r2.
A more modern variant of ppc64_standard_linkage2 differing in
register usage. */
PowerPC PLT stub matching This patch fixes a number of bugs in ppc32 plt stub matching code. 1) The 4-insn stubs for shared libs and PIEs weren't matched. 2) The executable stub miscalculated PLT entry address (by oring a sign-extended quantity rather than adding). 3) Comments were not accurate. In addition, the insn arrays are made const. * ppc-linux-tdep.c (powerpc32_plt_stub): Make const. (powerpc32_plt_stub_so_1): Rename from powerpc32_plt_stub_so. Remove nop. Make const. Comment. (powerpc32_plt_stub_so_2): New. (POWERPC32_PLT_CHECK_LEN): Rename from POWERPC32_PLT_STUB_LEN. Correct count. Update uses. (ppc_skip_trampoline_code): Match powerpc32_plt_stub_so_2 too. Move common code reading PLT entry word. Correct powerpc32_plt_stub PLT address calculation. * ppc64-tdep.c (ppc64_standard_linkage1): Make const. (ppc64_standard_linkage2, ppc64_standard_linkage3): Likewise. (ppc64_standard_linkage4, ppc64_standard_linkage5): Likewise. (ppc64_standard_linkage6, ppc64_standard_linkage7): Likewise. (ppc64_standard_linkage8): Likewise. * rs6000-tdep.c (ppc_insns_match_pattern): Make pattern const. Correct insns description. * ppc-tdep.h (ppc_insns_match_pattern): Update prototype. Reviewed-By: Yao Qi <qiyaoltc@gmail.com>
2018-01-24 12:52:17 +08:00
static const struct ppc_insn_pattern ppc64_standard_linkage4[] =
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
{
/* std r2, 40(r1) <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, insn_ds (62, 2, 1, 40, 0), 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
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/* addis r11, r2, <any> */
{ insn_d (-1, -1, -1, 0), insn_d (15, 11, 2, 0), 0 },
/* ld r12, <any>(r11) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 11, 0, 0), 0 },
/* addi r11, r11, <any> <optional> */
{ insn_d (-1, -1, -1, 0), insn_d (14, 11, 11, 0), 1 },
/* mtctr r12 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
/* xor r2, r12, r12 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x7d826278, 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* add r11, r11, r2 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x7d6b1214, 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* ld r2, <any>(r11) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 2, 11, 0, 0), 0 },
/* ld r11, <any>(r11) <optional> */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 11, 0, 0), 1 },
/* bctr <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x4e800420, 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* cmpldi r2, 0 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x28220000, 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
{ 0, 0, 0 }
};
/* ELFv1 PLT call stub to access PLT entries within +/- 32k of r2.
A more modern variant of ppc64_standard_linkage3 differing in
register usage. */
PowerPC PLT stub matching This patch fixes a number of bugs in ppc32 plt stub matching code. 1) The 4-insn stubs for shared libs and PIEs weren't matched. 2) The executable stub miscalculated PLT entry address (by oring a sign-extended quantity rather than adding). 3) Comments were not accurate. In addition, the insn arrays are made const. * ppc-linux-tdep.c (powerpc32_plt_stub): Make const. (powerpc32_plt_stub_so_1): Rename from powerpc32_plt_stub_so. Remove nop. Make const. Comment. (powerpc32_plt_stub_so_2): New. (POWERPC32_PLT_CHECK_LEN): Rename from POWERPC32_PLT_STUB_LEN. Correct count. Update uses. (ppc_skip_trampoline_code): Match powerpc32_plt_stub_so_2 too. Move common code reading PLT entry word. Correct powerpc32_plt_stub PLT address calculation. * ppc64-tdep.c (ppc64_standard_linkage1): Make const. (ppc64_standard_linkage2, ppc64_standard_linkage3): Likewise. (ppc64_standard_linkage4, ppc64_standard_linkage5): Likewise. (ppc64_standard_linkage6, ppc64_standard_linkage7): Likewise. (ppc64_standard_linkage8): Likewise. * rs6000-tdep.c (ppc_insns_match_pattern): Make pattern const. Correct insns description. * ppc-tdep.h (ppc_insns_match_pattern): Update prototype. Reviewed-By: Yao Qi <qiyaoltc@gmail.com>
2018-01-24 12:52:17 +08:00
static const struct ppc_insn_pattern ppc64_standard_linkage5[] =
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
{
/* std r2, 40(r1) <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, insn_ds (62, 2, 1, 40, 0), 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* ld r12, <any>(r2) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 2, 0, 0), 0 },
/* addi r2, r2, <any> <optional> */
{ insn_d (-1, -1, -1, 0), insn_d (14, 2, 2, 0), 1 },
/* mtctr r12 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
/* xor r11, r12, r12 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x7d8b6278, 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* add r2, r2, r11 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x7c425a14, 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* ld r11, <any>(r2) <optional> */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 2, 0, 0), 1 },
/* ld r2, <any>(r2) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 2, 2, 0, 0), 0 },
/* bctr <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x4e800420, 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* cmpldi r2, 0 <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x28220000, 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
{ 0, 0, 0 }
};
/* ELFv2 PLT call stub to access PLT entries more than +/- 32k from r2. */
PowerPC PLT stub matching This patch fixes a number of bugs in ppc32 plt stub matching code. 1) The 4-insn stubs for shared libs and PIEs weren't matched. 2) The executable stub miscalculated PLT entry address (by oring a sign-extended quantity rather than adding). 3) Comments were not accurate. In addition, the insn arrays are made const. * ppc-linux-tdep.c (powerpc32_plt_stub): Make const. (powerpc32_plt_stub_so_1): Rename from powerpc32_plt_stub_so. Remove nop. Make const. Comment. (powerpc32_plt_stub_so_2): New. (POWERPC32_PLT_CHECK_LEN): Rename from POWERPC32_PLT_STUB_LEN. Correct count. Update uses. (ppc_skip_trampoline_code): Match powerpc32_plt_stub_so_2 too. Move common code reading PLT entry word. Correct powerpc32_plt_stub PLT address calculation. * ppc64-tdep.c (ppc64_standard_linkage1): Make const. (ppc64_standard_linkage2, ppc64_standard_linkage3): Likewise. (ppc64_standard_linkage4, ppc64_standard_linkage5): Likewise. (ppc64_standard_linkage6, ppc64_standard_linkage7): Likewise. (ppc64_standard_linkage8): Likewise. * rs6000-tdep.c (ppc_insns_match_pattern): Make pattern const. Correct insns description. * ppc-tdep.h (ppc_insns_match_pattern): Update prototype. Reviewed-By: Yao Qi <qiyaoltc@gmail.com>
2018-01-24 12:52:17 +08:00
static const struct ppc_insn_pattern ppc64_standard_linkage6[] =
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
{
/* std r2, 24(r1) <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, insn_ds (62, 2, 1, 24, 0), 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* addis r11, r2, <any> */
{ insn_d (-1, -1, -1, 0), insn_d (15, 11, 2, 0), 0 },
/* ld r12, <any>(r11) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 11, 0, 0), 0 },
/* mtctr r12 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
/* bctr */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x4e800420, 0 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
{ 0, 0, 0 }
};
/* ELFv2 PLT call stub to access PLT entries within +/- 32k of r2. */
PowerPC PLT stub matching This patch fixes a number of bugs in ppc32 plt stub matching code. 1) The 4-insn stubs for shared libs and PIEs weren't matched. 2) The executable stub miscalculated PLT entry address (by oring a sign-extended quantity rather than adding). 3) Comments were not accurate. In addition, the insn arrays are made const. * ppc-linux-tdep.c (powerpc32_plt_stub): Make const. (powerpc32_plt_stub_so_1): Rename from powerpc32_plt_stub_so. Remove nop. Make const. Comment. (powerpc32_plt_stub_so_2): New. (POWERPC32_PLT_CHECK_LEN): Rename from POWERPC32_PLT_STUB_LEN. Correct count. Update uses. (ppc_skip_trampoline_code): Match powerpc32_plt_stub_so_2 too. Move common code reading PLT entry word. Correct powerpc32_plt_stub PLT address calculation. * ppc64-tdep.c (ppc64_standard_linkage1): Make const. (ppc64_standard_linkage2, ppc64_standard_linkage3): Likewise. (ppc64_standard_linkage4, ppc64_standard_linkage5): Likewise. (ppc64_standard_linkage6, ppc64_standard_linkage7): Likewise. (ppc64_standard_linkage8): Likewise. * rs6000-tdep.c (ppc_insns_match_pattern): Make pattern const. Correct insns description. * ppc-tdep.h (ppc_insns_match_pattern): Update prototype. Reviewed-By: Yao Qi <qiyaoltc@gmail.com>
2018-01-24 12:52:17 +08:00
static const struct ppc_insn_pattern ppc64_standard_linkage7[] =
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
{
/* std r2, 24(r1) <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, insn_ds (62, 2, 1, 24, 0), 1 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
/* ld r12, <any>(r2) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 2, 0, 0), 0 },
/* mtctr r12 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
/* bctr */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x4e800420, 0 },
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
{ 0, 0, 0 }
};
Support fusion for ELFv2 stubs Power8 fuses addis,addi and addis,ld sequences when the target of the addis is the same as the addi/ld. Thus addis r12,r2,xxx@ha addi r12,r12,xxx@l / ld r12,xxx@l(r12) is faster than addis r11,r2,xxx@ha addi r12,r11,xxx@l / ld r12,xxx@l(r11) So use the form that allows fusion in plt call and branch stubs. bfd/ * elf64-ppc.c (ADDIS_R12_R2): Define. (build_plt_stub): Support fusion on ELFv2 stub. (ppc_build_one_stub): Likewise for plt branch stubs. gold/ * powerpc.cc (addis_12_2): Define. (Stub_table::do_write): Support fusion on ELFv2 stubs. ld/testsuite/ * ld-powerpc/elfv2exe.d: Update for changed plt call stubs. gdb/ * ppc64-tdep.c (ppc64_standard_linkage8): New. (ppc64_skip_trampoline_code): Recognise ELFv2 stub supporting fusion.
2014-06-03 09:25:29 +08:00
/* ELFv2 PLT call stub to access PLT entries more than +/- 32k from r2,
supporting fusion. */
PowerPC PLT stub matching This patch fixes a number of bugs in ppc32 plt stub matching code. 1) The 4-insn stubs for shared libs and PIEs weren't matched. 2) The executable stub miscalculated PLT entry address (by oring a sign-extended quantity rather than adding). 3) Comments were not accurate. In addition, the insn arrays are made const. * ppc-linux-tdep.c (powerpc32_plt_stub): Make const. (powerpc32_plt_stub_so_1): Rename from powerpc32_plt_stub_so. Remove nop. Make const. Comment. (powerpc32_plt_stub_so_2): New. (POWERPC32_PLT_CHECK_LEN): Rename from POWERPC32_PLT_STUB_LEN. Correct count. Update uses. (ppc_skip_trampoline_code): Match powerpc32_plt_stub_so_2 too. Move common code reading PLT entry word. Correct powerpc32_plt_stub PLT address calculation. * ppc64-tdep.c (ppc64_standard_linkage1): Make const. (ppc64_standard_linkage2, ppc64_standard_linkage3): Likewise. (ppc64_standard_linkage4, ppc64_standard_linkage5): Likewise. (ppc64_standard_linkage6, ppc64_standard_linkage7): Likewise. (ppc64_standard_linkage8): Likewise. * rs6000-tdep.c (ppc_insns_match_pattern): Make pattern const. Correct insns description. * ppc-tdep.h (ppc_insns_match_pattern): Update prototype. Reviewed-By: Yao Qi <qiyaoltc@gmail.com>
2018-01-24 12:52:17 +08:00
static const struct ppc_insn_pattern ppc64_standard_linkage8[] =
Support fusion for ELFv2 stubs Power8 fuses addis,addi and addis,ld sequences when the target of the addis is the same as the addi/ld. Thus addis r12,r2,xxx@ha addi r12,r12,xxx@l / ld r12,xxx@l(r12) is faster than addis r11,r2,xxx@ha addi r12,r11,xxx@l / ld r12,xxx@l(r11) So use the form that allows fusion in plt call and branch stubs. bfd/ * elf64-ppc.c (ADDIS_R12_R2): Define. (build_plt_stub): Support fusion on ELFv2 stub. (ppc_build_one_stub): Likewise for plt branch stubs. gold/ * powerpc.cc (addis_12_2): Define. (Stub_table::do_write): Support fusion on ELFv2 stubs. ld/testsuite/ * ld-powerpc/elfv2exe.d: Update for changed plt call stubs. gdb/ * ppc64-tdep.c (ppc64_standard_linkage8): New. (ppc64_skip_trampoline_code): Recognise ELFv2 stub supporting fusion.
2014-06-03 09:25:29 +08:00
{
/* std r2, 24(r1) <optional> */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, insn_ds (62, 2, 1, 24, 0), 1 },
Support fusion for ELFv2 stubs Power8 fuses addis,addi and addis,ld sequences when the target of the addis is the same as the addi/ld. Thus addis r12,r2,xxx@ha addi r12,r12,xxx@l / ld r12,xxx@l(r12) is faster than addis r11,r2,xxx@ha addi r12,r11,xxx@l / ld r12,xxx@l(r11) So use the form that allows fusion in plt call and branch stubs. bfd/ * elf64-ppc.c (ADDIS_R12_R2): Define. (build_plt_stub): Support fusion on ELFv2 stub. (ppc_build_one_stub): Likewise for plt branch stubs. gold/ * powerpc.cc (addis_12_2): Define. (Stub_table::do_write): Support fusion on ELFv2 stubs. ld/testsuite/ * ld-powerpc/elfv2exe.d: Update for changed plt call stubs. gdb/ * ppc64-tdep.c (ppc64_standard_linkage8): New. (ppc64_skip_trampoline_code): Recognise ELFv2 stub supporting fusion.
2014-06-03 09:25:29 +08:00
/* addis r12, r2, <any> */
{ insn_d (-1, -1, -1, 0), insn_d (15, 12, 2, 0), 0 },
/* ld r12, <any>(r12) */
{ insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 12, 0, 0), 0 },
/* mtctr r12 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
/* bctr */
Avoid -Wnarrowing warnings in ppc64-tdep.c This avoids -Wnarrowing warnings in ppc64-tdep.c, by adding a few casts to unsigned. gdb/ChangeLog 2018-08-27 Tom Tromey <tom@tromey.com> * ppc64-tdep.c (insn_d, insn_ds, insn_xfx): Add casts to unsigned. (ppc64_standard_linkage1, ppc64_standard_linkage2) (ppc64_standard_linkage3, ppc64_standard_linkage4) (ppc64_standard_linkage5, ppc64_standard_linkage6) (ppc64_standard_linkage7, ppc64_standard_linkage8): Add casts to unsigned.
2018-08-08 03:13:58 +08:00
{ (unsigned) -1, 0x4e800420, 0 },
Support fusion for ELFv2 stubs Power8 fuses addis,addi and addis,ld sequences when the target of the addis is the same as the addi/ld. Thus addis r12,r2,xxx@ha addi r12,r12,xxx@l / ld r12,xxx@l(r12) is faster than addis r11,r2,xxx@ha addi r12,r11,xxx@l / ld r12,xxx@l(r11) So use the form that allows fusion in plt call and branch stubs. bfd/ * elf64-ppc.c (ADDIS_R12_R2): Define. (build_plt_stub): Support fusion on ELFv2 stub. (ppc_build_one_stub): Likewise for plt branch stubs. gold/ * powerpc.cc (addis_12_2): Define. (Stub_table::do_write): Support fusion on ELFv2 stubs. ld/testsuite/ * ld-powerpc/elfv2exe.d: Update for changed plt call stubs. gdb/ * ppc64-tdep.c (ppc64_standard_linkage8): New. (ppc64_skip_trampoline_code): Recognise ELFv2 stub supporting fusion.
2014-06-03 09:25:29 +08:00
{ 0, 0, 0 }
};
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
/* Power 10 ELFv2 PLT call stubs */
static const struct ppc_insn_pattern ppc64_standard_linkage9[] =
{
/* std %r2,0+40(%r1) <optional> */
{ insn_ds (-1, -1, -1, 0, 1), insn_ds (62, 2, 1, 40, 0), 1 },
/* pld r12, <any> */
{ prefix (-1, -1, 1, 0), prefix (0, 0, 1, 0), 0 },
{ insn_d (-1, -1, -1, 0), insn_d (57, 12, 0, 0), 0 },
/* mtctr r12 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
/* bctr */
{ (unsigned) -1, 0x4e800420, 0 },
{ 0, 0, 0 }
};
static const struct ppc_insn_pattern ppc64_standard_linkage10[] =
{
/* std %r2,0+40(%r1) <optional> */
{ insn_ds (-1, -1, -1, 0, 1), insn_ds (62, 2, 1, 40, 0), 1 },
/* paddi r12,<any> */
{ prefix (-1, -1, 1, 0), prefix (2, 0, 1, 0), 0 },
{ insn_d (-1, -1, -1, 0), insn_d (14, 12, 0, 0), 0 },
/* mtctr r12 <optional> */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
/* bctr */
{ (unsigned) -1, 0x4e800420, 0 },
{ 0, 0, 0 }
};
static const struct ppc_insn_pattern ppc64_standard_linkage11[] =
{
/* std %r2,0+40(%r1) <optional> */
{ insn_ds (-1, -1, -1, 0, 1), insn_ds (62, 2, 1, 40, 0), 1 },
/* li %r11,0 <optional> */
{ insn_d (-1, -1, -1, 0), insn_d (14, 11, 0, 0), 1 },
/* sldi %r11,%r11,34 <eq to rldicr rx,ry,n, 63-n> <optional> */
{ insn_md (-1, -1, -1, 0, 0, 1), insn_md (30, 11, 11, 34, 63-34, 0), 1 },
/* paddi r12, <any> */
{ prefix (-1, -1, 1, 0), prefix (2, 0, 1, 0), 0 },
{ insn_d (-1, -1, -1, 0), insn_d (14, 12, 0, 0), 0 },
/* ldx %r12,%r11,%r12 <optional> */
{ (unsigned) -1, insn_x (31, 12, 11, 12, 21), 1 },
/* add %r12,%r11,%r12 <optional> */
{ (unsigned) -1, insn_xo (31, 12, 11, 12, 0, 0, 40), 1 },
/* mtctr r12 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
/* bctr */ // 13, 14, 15, 16
{ (unsigned) -1, 0x4e800420, 0 },
{ 0, 0, 0 }
};
static const struct ppc_insn_pattern ppc64_standard_linkage12[] =
{
/* std %r2,0+40(%r1) <optional> */
{ insn_ds (-1, -1, -1, 0, 1), insn_ds (62, 2, 1, 40, 0), 1 },
/* lis %r11,xxx@ha <equivalent addis rx, 0, val> */
/* addis r12, r2, <any> */
{ insn_d (-1, -1, -1, 0), insn_d (15, 12, 2, 0), 0 },
/* ori %r11,%r11,xxx@l */
{ insn_d (-1, -1, -1, 0), insn_d (24, 11, 11, 0), 0 },
/* sldi %r11,%r11,34 <optional> */
{ (unsigned) -1, insn_md (30, 11, 11, 34, 63-34, 0), 1 },
/*paddi r12,<any> */
{ prefix (-1, -1, 1, 0), prefix (2, 0, 1, 0), 0 },
{ insn_d (-1, -1, -1, 0), insn_d (14, 12, 0, 0), 0 },
/* sldi %r11,%r11,34 <optional> */
{ (unsigned) -1, insn_md (30, 11, 11, 34, 63-34, 0), 1 },
/* ldx %r12,%r11,%r12 <optional> */
{ (unsigned) -1, insn_x (31, 12, 11, 12, 21), 1 },
/* add %r12,%r11,%r12 <optional> */
{ (unsigned) -1, insn_xo (31, 12, 11, 12, 0, 0, 40), 1 },
/* mtctr r12 */
{ insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
/* bctr */ // 17, 18, 19, 20
{ (unsigned) -1, 0x4e800420, 0 },
{ 0, 0, 0 }
};
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* When the dynamic linker is doing lazy symbol resolution, the first
call to a function in another object will go like this:
- The user's function calls the linkage function:
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
100003d4: 4b ff ff ad bl 10000380 <nnnn.plt_call.printf>
100003d8: e8 41 00 28 ld r2,40(r1)
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
- The linkage function loads the entry point and toc pointer from
the function descriptor in the PLT, and jumps to it:
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
<nnnn.plt_call.printf>:
10000380: f8 41 00 28 std r2,40(r1)
10000384: e9 62 80 78 ld r11,-32648(r2)
10000388: 7d 69 03 a6 mtctr r11
1000038c: e8 42 80 80 ld r2,-32640(r2)
10000390: 28 22 00 00 cmpldi r2,0
10000394: 4c e2 04 20 bnectr+
10000398: 48 00 03 a0 b 10000738 <printf@plt>
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
- But since this is the first time that PLT entry has been used, it
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
sends control to its glink entry. That loads the number of the
PLT entry and jumps to the common glink0 code:
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
<printf@plt>:
10000738: 38 00 00 01 li r0,1
1000073c: 4b ff ff bc b 100006f8 <__glink_PLTresolve>
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
- The common glink0 code then transfers control to the dynamic
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
linker's fixup code:
100006f0: 0000000000010440 .quad plt0 - (. + 16)
<__glink_PLTresolve>:
100006f8: 7d 88 02 a6 mflr r12
100006fc: 42 9f 00 05 bcl 20,4*cr7+so,10000700
10000700: 7d 68 02 a6 mflr r11
10000704: e8 4b ff f0 ld r2,-16(r11)
10000708: 7d 88 03 a6 mtlr r12
1000070c: 7d 82 5a 14 add r12,r2,r11
10000710: e9 6c 00 00 ld r11,0(r12)
10000714: e8 4c 00 08 ld r2,8(r12)
10000718: 7d 69 03 a6 mtctr r11
1000071c: e9 6c 00 10 ld r11,16(r12)
10000720: 4e 80 04 20 bctr
Add missing file from the previous commit.
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Eventually, this code will figure out how to skip all of this,
including the dynamic linker. At the moment, we just get through
the linkage function. */
/* If the current thread is about to execute a series of instructions
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
matching the ppc64_standard_linkage pattern, and INSN is the result
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
from that pattern match, return the code address to which the
standard linkage function will send them. (This doesn't deal with
dynamic linker lazy symbol resolution stubs.) */
static CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_standard_linkage1_target (const frame_info_ptr &frame, unsigned int *insn)
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
{
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
CORE_ADDR plt_off = ((ppc_insn_d_field (insn[0]) << 16)
+ ppc_insn_ds_field (insn[2]));
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
return ppc64_plt_entry_point (frame, plt_off);
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
}
static CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_standard_linkage2_target (const frame_info_ptr &frame, unsigned int *insn)
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
{
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
CORE_ADDR plt_off = ((ppc_insn_d_field (insn[1]) << 16)
+ ppc_insn_ds_field (insn[3]));
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
return ppc64_plt_entry_point (frame, plt_off);
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
}
static CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_standard_linkage3_target (const frame_info_ptr &frame, unsigned int *insn)
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
{
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
CORE_ADDR plt_off = ppc_insn_ds_field (insn[1]);
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
return ppc64_plt_entry_point (frame, plt_off);
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
}
static CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_standard_linkage4_target (const frame_info_ptr &frame, unsigned int *insn)
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
{
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
CORE_ADDR plt_off = ((ppc_insn_d_field (insn[1]) << 16)
+ ppc_insn_ds_field (insn[2]));
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
return ppc64_plt_entry_point (frame, plt_off);
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
}
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
static CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_pcrel_linkage1_target (const frame_info_ptr &frame, unsigned int *insn,
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
CORE_ADDR pc)
{
/* insn[0] is for the std instruction. */
CORE_ADDR plt_off = ppc_insn_prefix_dform (insn[1], insn[2]);
return ppc64_plt_pcrel_entry_point (frame, plt_off, pc);
}
static CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_pcrel_linkage2_target (const frame_info_ptr &frame, unsigned int *insn,
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
CORE_ADDR pc)
{
CORE_ADDR plt_off;
/* insn[0] is for the std instruction.
insn[1] is for the li r11 instruction */
plt_off = ppc_insn_prefix_dform (insn[2], insn[3]);
return ppc64_plt_pcrel_entry_point (frame, plt_off, pc);
}
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* Given that we've begun executing a call trampoline at PC, return
Add missing comments in rs6000-tdep.c, ppc64-tdep.c and ppc-linux-tdep.c. gdb/ChangeLog: * ppc-linux-tdep.c (ppc_skip_trampoline_code, ppc_canonicalize_syscall, ppc_linux_syscall_record, ppc_linux_record_signal, ppc_init_linux_record_tdep): Add comments. * ppc64-tdep.c (ppc64_skip_trampoline_code): Likewise. * rs6000-tdep.c (rs6000_epilogue_frame_cache, rs6000_epilogue_frame_this_id, rs6000_epilogue_frame_prev_register, rs6000_epilogue_frame_sniffer, ppc_record_vsr, ppc_process_record_op4, ppc_process_record_op19, ppc_process_record_op31, ppc_process_record_op59, ppc_process_record_op60, ppc_process_record_op63): Likewise.
2015-01-19 23:34:07 +08:00
the entry point of the function the trampoline will go to.
When the execution direction is EXEC_REVERSE, scan backward to
check whether we are in the middle of a PLT stub. */
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
[ppc64le] Use skip_entrypoint for skip_trampoline_code ppc64le loses control when stepping between two PLT-called functions inside a shared library: 29 shlib_second (); /* first-hit */^M (gdb) PASS: gdb.base/solib-intra-step.exp: first-hit step^M ^M Program received signal SIGABRT, Aborted.^M 0x00003fffb7cbe578 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56^M 56 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);^M (gdb) FAIL: gdb.base/solib-intra-step.exp: second-hit -> 29 shlib_second (); /* first-hit */^M (gdb) PASS: gdb.base/solib-intra-step.exp: first-hit step^M shlib_second () at ./gdb.base/solib-intra-step-lib.c:23^M 23 abort (); /* second-hit */^M (gdb) PASS: gdb.base/solib-intra-step.exp: second-hit This is because gdbarch_skip_trampoline_code() will resolve the final function as shlib_second+0 and place there the breakpoint, but ld.so will jump after the breakpoint - at shlib_second+8 - as it is ELFv2 local symbol optimization: Dump of assembler code for function shlib_second: 0x0000000000000804 <+0>: addis r2,r12,2 0x0000000000000808 <+4>: addi r2,r2,30668 0x000000000000080c <+8>: mflr r0 Currently gdbarch_skip_entrypoint() has been called in skip_prologue_sal() and fill_in_stop_func() but that is not enough. I believe gdbarch_skip_entrypoint() should be called after every gdbarch_skip_trampoline_code(). gdb/ChangeLog 2015-09-15 Jan Kratochvil <jan.kratochvil@redhat.com> * linespec.c (minsym_found): Call gdbarch_skip_entrypoint. * ppc64-tdep.c (ppc64_skip_trampoline_code): Rename to ... (ppc64_skip_trampoline_code_1): ... here. (ppc64_skip_trampoline_code): New wrapper function. * symtab.c (find_function_start_sal): Call gdbarch_skip_entrypoint. gdb/testsuite/ChangeLog 2015-09-15 Jan Kratochvil <jan.kratochvil@redhat.com> * gdb.opt/solib-intra-step-lib.c: New file. * gdb.opt/solib-intra-step-main.c: New file. * gdb.opt/solib-intra-step.exp: New file.
2015-09-16 01:08:04 +08:00
static CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_skip_trampoline_code_1 (const frame_info_ptr &frame, CORE_ADDR pc)
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
{
* ppc-tdep.h (ppc_insns_match_pattern): Update prototype. * rs6000-tdep.c (read_insn): Add frame param, don't assume big-endian. (ppc_insns_match_pattern): Add frame param. Avoid multiple target mem reads on optional insns. * ppc-linux-tdep.c (ppc_skip_trampoline_code): Update ppc_insns_match_pattern calls. * ppc64-tdep.c (ppc64_standard_linkage2, ppc64_standard_linkage3): Add match for power7 thread safety insns, and new order of std 2,40(1) insn. Correct code shown for _dl_runtime_resolve invocation in comment, and update rest of comment. (PPC64_STANDARD_LINKAGE1_LEN, PPC64_STANDARD_LINKAGE2_LEN, PPC64_STANDARD_LINKAGE3_LEN): Delete. (ppc64_standard_linkage2_target): Update insn offsets. (ppc64_skip_trampoline_code): Use a single insn buffer. Match newer stubs first. Update calls.
2013-06-04 10:44:35 +08:00
#define MAX(a,b) ((a) > (b) ? (a) : (b))
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
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unsigned int insns[MAX (MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage1),
ARRAY_SIZE (ppc64_standard_linkage2)),
MAX (ARRAY_SIZE (ppc64_standard_linkage3),
ARRAY_SIZE (ppc64_standard_linkage4))),
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
MAX(MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage5),
PowerPC64 ELFv2 trampoline match ELFv2 needs different plt call stubs to ELFv1, register usage differs too. When I added these to ld I changed register usage in the ELFv1 stubs as well, simplifying the linker code and (perhaps) future maintenance. All well and good, but this means gdb needs to cope with more stub variants. This patch also handles skipping over addis/addi setting up r2 in ELFv2 global entry code. We want breakpoints to be set past this point to catch calls via the local entry point. * ppc64-tdep.c (ppc64_plt_entry_point): Renamed from.. (ppc64_desc_entry_point): ..this. Update comments here and at call points. (ppc64_standard_linkage1, ppc64_standard_linkage2, ppc64_standard_linkage3): Update comments. (ppc64_standard_linkage4, ppc64_standard_linkage5, (ppc64_standard_linkage6, ppc64_standard_linkage7): New insn patterns. (ppc64_standard_linkage4_target): New function. (ppc64_skip_trampoline_code): Skip ELFv2 patterns too. * rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct nop match. Fix comment wrap.
2013-11-11 11:44:40 +08:00
ARRAY_SIZE (ppc64_standard_linkage6)),
Support fusion for ELFv2 stubs Power8 fuses addis,addi and addis,ld sequences when the target of the addis is the same as the addi/ld. Thus addis r12,r2,xxx@ha addi r12,r12,xxx@l / ld r12,xxx@l(r12) is faster than addis r11,r2,xxx@ha addi r12,r11,xxx@l / ld r12,xxx@l(r11) So use the form that allows fusion in plt call and branch stubs. bfd/ * elf64-ppc.c (ADDIS_R12_R2): Define. (build_plt_stub): Support fusion on ELFv2 stub. (ppc_build_one_stub): Likewise for plt branch stubs. gold/ * powerpc.cc (addis_12_2): Define. (Stub_table::do_write): Support fusion on ELFv2 stubs. ld/testsuite/ * ld-powerpc/elfv2exe.d: Update for changed plt call stubs. gdb/ * ppc64-tdep.c (ppc64_standard_linkage8): New. (ppc64_skip_trampoline_code): Recognise ELFv2 stub supporting fusion.
2014-06-03 09:25:29 +08:00
MAX (ARRAY_SIZE (ppc64_standard_linkage7),
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
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ARRAY_SIZE (ppc64_standard_linkage8))),
gdb, gdbserver, gdbsupport: fix whitespace issues Replace spaces with tabs in a bunch of places. Change-Id: If0f87180f1d13028dc178e5a8af7882a067868b0
2023-03-10 03:56:09 +08:00
MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage9),
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
ARRAY_SIZE (ppc64_standard_linkage10)),
gdb, gdbserver, gdbsupport: fix whitespace issues Replace spaces with tabs in a bunch of places. Change-Id: If0f87180f1d13028dc178e5a8af7882a067868b0
2023-03-10 03:56:09 +08:00
MAX (ARRAY_SIZE (ppc64_standard_linkage11),
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
ARRAY_SIZE (ppc64_standard_linkage12)))))
Support fusion for ELFv2 stubs Power8 fuses addis,addi and addis,ld sequences when the target of the addis is the same as the addi/ld. Thus addis r12,r2,xxx@ha addi r12,r12,xxx@l / ld r12,xxx@l(r12) is faster than addis r11,r2,xxx@ha addi r12,r11,xxx@l / ld r12,xxx@l(r11) So use the form that allows fusion in plt call and branch stubs. bfd/ * elf64-ppc.c (ADDIS_R12_R2): Define. (build_plt_stub): Support fusion on ELFv2 stub. (ppc_build_one_stub): Likewise for plt branch stubs. gold/ * powerpc.cc (addis_12_2): Define. (Stub_table::do_write): Support fusion on ELFv2 stubs. ld/testsuite/ * ld-powerpc/elfv2exe.d: Update for changed plt call stubs. gdb/ * ppc64-tdep.c (ppc64_standard_linkage8): New. (ppc64_skip_trampoline_code): Recognise ELFv2 stub supporting fusion.
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- 1];
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
CORE_ADDR target;
Skip-trampoline for PowerPC reverse-stepping.
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int scan_limit, i;
scan_limit = 1;
/* When reverse-debugging, scan backward to check whether we are
in the middle of trampoline code. */
if (execution_direction == EXEC_REVERSE)
scan_limit = ARRAY_SIZE (insns) - 1;
for (i = 0; i < scan_limit; i++)
{
Add Power 10 PLT instruction patterns gdb/ChangeLog: 2021-06-07 Carl Love <cel@us.ibm.com> * ppc-tdep.h (ppc_insn_prefix_dform): Declare. * ppc64-tdep.c(insn_md, insn_x, insn_xo): New macros. (ppc64_plt_pcrel_entry_point, ppc64_pcrel_linkage1_target, ppc64_pcrel_linkage2_target): New functions. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New ppc instruction patterns. (ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12): New variables in define MAX expression. (ppc64_skip_trampoline_code_1): Handle ppc64_standard_linkage9, ppc64_standard_linkage10, ppc64_standard_linkage11, ppc64_standard_linkage12. * (ppc_insn_prefix_dform): New function.
2021-04-30 06:19:13 +08:00
if (i < ARRAY_SIZE (ppc64_standard_linkage12) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage12, insns))
pc = ppc64_pcrel_linkage1_target (frame, insns, pc);
else if (i < ARRAY_SIZE (ppc64_standard_linkage11) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage11, insns))
pc = ppc64_pcrel_linkage2_target (frame, insns, pc);
else if (i < ARRAY_SIZE (ppc64_standard_linkage10) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage10, insns))
pc = ppc64_pcrel_linkage1_target (frame, insns, pc);
else if (i < ARRAY_SIZE (ppc64_standard_linkage9) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage9, insns))
pc = ppc64_pcrel_linkage1_target (frame, insns, pc);
else if (i < ARRAY_SIZE (ppc64_standard_linkage8) - 1
Skip-trampoline for PowerPC reverse-stepping.
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&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage8, insns))
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
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pc = ppc64_standard_linkage4_target (frame, insns);
Skip-trampoline for PowerPC reverse-stepping.
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else if (i < ARRAY_SIZE (ppc64_standard_linkage7) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage7,
insns))
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
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pc = ppc64_standard_linkage3_target (frame, insns);
Skip-trampoline for PowerPC reverse-stepping.
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else if (i < ARRAY_SIZE (ppc64_standard_linkage6) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage6,
insns))
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
pc = ppc64_standard_linkage4_target (frame, insns);
Skip-trampoline for PowerPC reverse-stepping.
2015-01-17 14:30:59 +08:00
else if (i < ARRAY_SIZE (ppc64_standard_linkage5) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage5,
insns)
&& (insns[8] != 0 || insns[9] != 0))
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
pc = ppc64_standard_linkage3_target (frame, insns);
Skip-trampoline for PowerPC reverse-stepping.
2015-01-17 14:30:59 +08:00
else if (i < ARRAY_SIZE (ppc64_standard_linkage4) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage4,
insns)
&& (insns[9] != 0 || insns[10] != 0))
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
pc = ppc64_standard_linkage4_target (frame, insns);
Skip-trampoline for PowerPC reverse-stepping.
2015-01-17 14:30:59 +08:00
else if (i < ARRAY_SIZE (ppc64_standard_linkage3) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage3,
insns)
&& (insns[8] != 0 || insns[9] != 0))
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
pc = ppc64_standard_linkage3_target (frame, insns);
Skip-trampoline for PowerPC reverse-stepping.
2015-01-17 14:30:59 +08:00
else if (i < ARRAY_SIZE (ppc64_standard_linkage2) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage2,
insns)
&& (insns[10] != 0 || insns[11] != 0))
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
pc = ppc64_standard_linkage2_target (frame, insns);
Skip-trampoline for PowerPC reverse-stepping.
2015-01-17 14:30:59 +08:00
else if (i < ARRAY_SIZE (ppc64_standard_linkage1) - 1
&& ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage1,
insns))
PR22576, ppc64_skip_trampoline_code uses wrong r2 for EXEC_REVERSE The TOC pointer register, r2, on powerpc64 is generally not mentioned in debug info. It is saved and restored by call linkage code, and set to the callee value either by call stub code (ELFv1) or in the callee global entry point code (ELFv2). A call stub uses the caller TOC pointer to access the PLT. So for gdb to read the correct PLT entry in order to determine the destination of the trampoline, gdb needs to know the caller r2. When skipping over trampolines in the normal forward direction, the caller r2 is simply the current value of r2 (at the start of the trampoline). However, when reversing over trampolines the current value of r2 is that for the callee. Using that value results in wild reads of memory rather than the correct PLT entry. This patch corrects the value of r2 by using the value saved on the stack for reverse execution. Note that in reverse execution mode it isn't really necessary for skip_trampoline_code to return the actual destination, so we're doing a little more work than needed here. Any non-zero return value would do (and it would be nicer if the interface was changed to return the start of the stub). PR tdep/22576 * ppc64-tdep.c (ppc64_plt_entry_point): Rewrite to take TOC-relative PLT offset, and retrieve r2 from stack when executing in reverse. (ppc64_standard_linkage1_target): Drop pc param. Calculate offset rather than PLT address. (ppc64_standard_linkage2_target): Likewise. (ppc64_standard_linkage3_target): Likewise. (ppc64_standard_linkage4_target): Likewise. (ppc64_skip_trampoline_code_1): Adjust to suit.
2017-12-11 15:01:11 +08:00
pc = ppc64_standard_linkage1_target (frame, insns);
Skip-trampoline for PowerPC reverse-stepping.
2015-01-17 14:30:59 +08:00
else
{
[gdb] Fix grammar in comments and docs Fix grammar in some comments and docs: - machines that doesn't -> machines that don't - its a -> it's a - its the -> it's the - if does its not -> if it does it's not - one more instructions if doesn't match -> one more instruction if it doesn't match - it's own -> its own - it's first -> its first - it's pointer -> its pointer I also came across "it's performance" in gdb/stubs/*-stub.c in the HP public domain notice, I've left that alone. Tested on x86_64-linux.
2023-06-05 18:53:15 +08:00
/* Scan backward one more instruction if it doesn't match. */
Skip-trampoline for PowerPC reverse-stepping.
2015-01-17 14:30:59 +08:00
pc -= 4;
continue;
}
/* The PLT descriptor will either point to the already resolved target
gdb, gdbserver, gdbsupport: fix leading space vs tabs issues Many spots incorrectly use only spaces for indentation (for example, there are a lot of spots in ada-lang.c). I've always found it awkward when I needed to edit one of these spots: do I keep the original wrong indentation, or do I fix it? What if the lines around it are also wrong, do I fix them too? I probably don't want to fix them in the same patch, to avoid adding noise to my patch. So I propose to fix as much as possible once and for all (hopefully). One typical counter argument for this is that it makes code archeology more difficult, because git-blame will show this commit as the last change for these lines. My counter counter argument is: when git-blaming, you often need to do "blame the file at the parent commit" anyway, to go past some other refactor that touched the line you are interested in, but is not the change you are looking for. So you already need a somewhat efficient way to do this. Using some interactive tool, rather than plain git-blame, makes this trivial. For example, I use "tig blame <file>", where going back past the commit that changed the currently selected line is one keystroke. It looks like Magit in Emacs does it too (though I've never used it). Web viewers of Github and Gitlab do it too. My point is that it won't really make archeology more difficult. The other typical counter argument is that it will cause conflicts with existing patches. That's true... but it's a one time cost, and those are not conflicts that are difficult to resolve. I have also tried "git rebase --ignore-whitespace", it seems to work well. Although that will re-introduce the faulty indentation, so one needs to take care of fixing the indentation in the patch after that (which is easy). gdb/ChangeLog: * aarch64-linux-tdep.c: Fix indentation. * aarch64-ravenscar-thread.c: Fix indentation. * aarch64-tdep.c: Fix indentation. * aarch64-tdep.h: Fix indentation. * ada-lang.c: Fix indentation. * ada-lang.h: Fix indentation. * ada-tasks.c: Fix indentation. * ada-typeprint.c: Fix indentation. * ada-valprint.c: Fix indentation. * ada-varobj.c: Fix indentation. * addrmap.c: Fix indentation. * addrmap.h: Fix indentation. * agent.c: Fix indentation. * aix-thread.c: Fix indentation. * alpha-bsd-nat.c: Fix indentation. * alpha-linux-tdep.c: Fix indentation. * alpha-mdebug-tdep.c: Fix indentation. * alpha-nbsd-tdep.c: Fix indentation. * alpha-obsd-tdep.c: Fix indentation. * alpha-tdep.c: Fix indentation. * amd64-bsd-nat.c: Fix indentation. * amd64-darwin-tdep.c: Fix indentation. * amd64-linux-nat.c: Fix indentation. * amd64-linux-tdep.c: Fix indentation. * amd64-nat.c: Fix indentation. * amd64-obsd-tdep.c: Fix indentation. * amd64-tdep.c: Fix indentation. * amd64-windows-tdep.c: Fix indentation. * annotate.c: Fix indentation. * arc-tdep.c: Fix indentation. * arch-utils.c: Fix indentation. * arch/arm-get-next-pcs.c: Fix indentation. * arch/arm.c: Fix indentation. * arm-linux-nat.c: Fix indentation. * arm-linux-tdep.c: Fix indentation. * arm-nbsd-tdep.c: Fix indentation. * arm-pikeos-tdep.c: Fix indentation. * arm-tdep.c: Fix indentation. * arm-tdep.h: Fix indentation. * arm-wince-tdep.c: Fix indentation. * auto-load.c: Fix indentation. * auxv.c: Fix indentation. * avr-tdep.c: Fix indentation. * ax-gdb.c: Fix indentation. * ax-general.c: Fix indentation. * bfin-linux-tdep.c: Fix indentation. * block.c: Fix indentation. * block.h: Fix indentation. * blockframe.c: Fix indentation. * bpf-tdep.c: Fix indentation. * break-catch-sig.c: Fix indentation. * break-catch-syscall.c: Fix indentation. * break-catch-throw.c: Fix indentation. * breakpoint.c: Fix indentation. * breakpoint.h: Fix indentation. * bsd-uthread.c: Fix indentation. * btrace.c: Fix indentation. * build-id.c: Fix indentation. * buildsym-legacy.h: Fix indentation. * buildsym.c: Fix indentation. * c-typeprint.c: Fix indentation. * c-valprint.c: Fix indentation. * c-varobj.c: Fix indentation. * charset.c: Fix indentation. * cli/cli-cmds.c: Fix indentation. * cli/cli-decode.c: Fix indentation. * cli/cli-decode.h: Fix indentation. * cli/cli-script.c: Fix indentation. * cli/cli-setshow.c: Fix indentation. * coff-pe-read.c: Fix indentation. * coffread.c: Fix indentation. * compile/compile-cplus-types.c: Fix indentation. * compile/compile-object-load.c: Fix indentation. * compile/compile-object-run.c: Fix indentation. * completer.c: Fix indentation. * corefile.c: Fix indentation. * corelow.c: Fix indentation. * cp-abi.h: Fix indentation. * cp-namespace.c: Fix indentation. * cp-support.c: Fix indentation. * cp-valprint.c: Fix indentation. * cris-linux-tdep.c: Fix indentation. * cris-tdep.c: Fix indentation. * darwin-nat-info.c: Fix indentation. * darwin-nat.c: Fix indentation. * darwin-nat.h: Fix indentation. * dbxread.c: Fix indentation. * dcache.c: Fix indentation. * disasm.c: Fix indentation. * dtrace-probe.c: Fix indentation. * dwarf2/abbrev.c: Fix indentation. * dwarf2/attribute.c: Fix indentation. * dwarf2/expr.c: Fix indentation. * dwarf2/frame.c: Fix indentation. * dwarf2/index-cache.c: Fix indentation. * dwarf2/index-write.c: Fix indentation. * dwarf2/line-header.c: Fix indentation. * dwarf2/loc.c: Fix indentation. * dwarf2/macro.c: Fix indentation. * dwarf2/read.c: Fix indentation. * dwarf2/read.h: Fix indentation. * elfread.c: Fix indentation. * eval.c: Fix indentation. * event-top.c: Fix indentation. * exec.c: Fix indentation. * exec.h: Fix indentation. * expprint.c: Fix indentation. * f-lang.c: Fix indentation. * f-typeprint.c: Fix indentation. * f-valprint.c: Fix indentation. * fbsd-nat.c: Fix indentation. * fbsd-tdep.c: Fix indentation. * findvar.c: Fix indentation. * fork-child.c: Fix indentation. * frame-unwind.c: Fix indentation. * frame-unwind.h: Fix indentation. * frame.c: Fix indentation. * frv-linux-tdep.c: Fix indentation. * frv-tdep.c: Fix indentation. * frv-tdep.h: Fix indentation. * ft32-tdep.c: Fix indentation. * gcore.c: Fix indentation. * gdb_bfd.c: Fix indentation. * gdbarch.sh: Fix indentation. * gdbarch.c: Re-generate * gdbarch.h: Re-generate. * gdbcore.h: Fix indentation. * gdbthread.h: Fix indentation. * gdbtypes.c: Fix indentation. * gdbtypes.h: Fix indentation. * glibc-tdep.c: Fix indentation. * gnu-nat.c: Fix indentation. * gnu-nat.h: Fix indentation. * gnu-v2-abi.c: Fix indentation. * gnu-v3-abi.c: Fix indentation. * go32-nat.c: Fix indentation. * guile/guile-internal.h: Fix indentation. * guile/scm-cmd.c: Fix indentation. * guile/scm-frame.c: Fix indentation. * guile/scm-iterator.c: Fix indentation. * guile/scm-math.c: Fix indentation. * guile/scm-ports.c: Fix indentation. * guile/scm-pretty-print.c: Fix indentation. * guile/scm-value.c: Fix indentation. * h8300-tdep.c: Fix indentation. * hppa-linux-nat.c: Fix indentation. * hppa-linux-tdep.c: Fix indentation. * hppa-nbsd-nat.c: Fix indentation. * hppa-nbsd-tdep.c: Fix indentation. * hppa-obsd-nat.c: Fix indentation. * hppa-tdep.c: Fix indentation. * hppa-tdep.h: Fix indentation. * i386-bsd-nat.c: Fix indentation. * i386-darwin-nat.c: Fix indentation. * i386-darwin-tdep.c: Fix indentation. * i386-dicos-tdep.c: Fix indentation. * i386-gnu-nat.c: Fix indentation. * i386-linux-nat.c: Fix indentation. * i386-linux-tdep.c: Fix indentation. * i386-nto-tdep.c: Fix indentation. * i386-obsd-tdep.c: Fix indentation. * i386-sol2-nat.c: Fix indentation. * i386-tdep.c: Fix indentation. * i386-tdep.h: Fix indentation. * i386-windows-tdep.c: Fix indentation. * i387-tdep.c: Fix indentation. * i387-tdep.h: Fix indentation. * ia64-libunwind-tdep.c: Fix indentation. * ia64-libunwind-tdep.h: Fix indentation. * ia64-linux-nat.c: Fix indentation. * ia64-linux-tdep.c: Fix indentation. * ia64-tdep.c: Fix indentation. * ia64-tdep.h: Fix indentation. * ia64-vms-tdep.c: Fix indentation. * infcall.c: Fix indentation. * infcmd.c: Fix indentation. * inferior.c: Fix indentation. * infrun.c: Fix indentation. * iq2000-tdep.c: Fix indentation. * language.c: Fix indentation. * linespec.c: Fix indentation. * linux-fork.c: Fix indentation. * linux-nat.c: Fix indentation. * linux-tdep.c: Fix indentation. * linux-thread-db.c: Fix indentation. * lm32-tdep.c: Fix indentation. * m2-lang.c: Fix indentation. * m2-typeprint.c: Fix indentation. * m2-valprint.c: Fix indentation. * m32c-tdep.c: Fix indentation. * m32r-linux-tdep.c: Fix indentation. * m32r-tdep.c: Fix indentation. * m68hc11-tdep.c: Fix indentation. * m68k-bsd-nat.c: Fix indentation. * m68k-linux-nat.c: Fix indentation. * m68k-linux-tdep.c: Fix indentation. * m68k-tdep.c: Fix indentation. * machoread.c: Fix indentation. * macrocmd.c: Fix indentation. * macroexp.c: Fix indentation. * macroscope.c: Fix indentation. * macrotab.c: Fix indentation. * macrotab.h: Fix indentation. * main.c: Fix indentation. * mdebugread.c: Fix indentation. * mep-tdep.c: Fix indentation. * mi/mi-cmd-catch.c: Fix indentation. * mi/mi-cmd-disas.c: Fix indentation. * mi/mi-cmd-env.c: Fix indentation. * mi/mi-cmd-stack.c: Fix indentation. * mi/mi-cmd-var.c: Fix indentation. * mi/mi-cmds.c: Fix indentation. * mi/mi-main.c: Fix indentation. * mi/mi-parse.c: Fix indentation. * microblaze-tdep.c: Fix indentation. * minidebug.c: Fix indentation. * minsyms.c: Fix indentation. * mips-linux-nat.c: Fix indentation. * mips-linux-tdep.c: Fix indentation. * mips-nbsd-tdep.c: Fix indentation. * mips-tdep.c: Fix indentation. * mn10300-linux-tdep.c: Fix indentation. * mn10300-tdep.c: Fix indentation. * moxie-tdep.c: Fix indentation. * msp430-tdep.c: Fix indentation. * namespace.h: Fix indentation. * nat/fork-inferior.c: Fix indentation. * nat/gdb_ptrace.h: Fix indentation. * nat/linux-namespaces.c: Fix indentation. * nat/linux-osdata.c: Fix indentation. * nat/netbsd-nat.c: Fix indentation. * nat/x86-dregs.c: Fix indentation. * nbsd-nat.c: Fix indentation. * nbsd-tdep.c: Fix indentation. * nios2-linux-tdep.c: Fix indentation. * nios2-tdep.c: Fix indentation. * nto-procfs.c: Fix indentation. * nto-tdep.c: Fix indentation. * objfiles.c: Fix indentation. * objfiles.h: Fix indentation. * opencl-lang.c: Fix indentation. * or1k-tdep.c: Fix indentation. * osabi.c: Fix indentation. * osabi.h: Fix indentation. * osdata.c: Fix indentation. * p-lang.c: Fix indentation. * p-typeprint.c: Fix indentation. * p-valprint.c: Fix indentation. * parse.c: Fix indentation. * ppc-linux-nat.c: Fix indentation. * ppc-linux-tdep.c: Fix indentation. * ppc-nbsd-nat.c: Fix indentation. * ppc-nbsd-tdep.c: Fix indentation. * ppc-obsd-nat.c: Fix indentation. * ppc-ravenscar-thread.c: Fix indentation. * ppc-sysv-tdep.c: Fix indentation. * ppc64-tdep.c: Fix indentation. * printcmd.c: Fix indentation. * proc-api.c: Fix indentation. * producer.c: Fix indentation. * producer.h: Fix indentation. * prologue-value.c: Fix indentation. * prologue-value.h: Fix indentation. * psymtab.c: Fix indentation. * python/py-arch.c: Fix indentation. * python/py-bpevent.c: Fix indentation. * python/py-event.c: Fix indentation. * python/py-event.h: Fix indentation. * python/py-finishbreakpoint.c: Fix indentation. * python/py-frame.c: Fix indentation. * python/py-framefilter.c: Fix indentation. * python/py-inferior.c: Fix indentation. * python/py-infthread.c: Fix indentation. * python/py-objfile.c: Fix indentation. * python/py-prettyprint.c: Fix indentation. * python/py-registers.c: Fix indentation. * python/py-signalevent.c: Fix indentation. * python/py-stopevent.c: Fix indentation. * python/py-stopevent.h: Fix indentation. * python/py-threadevent.c: Fix indentation. * python/py-tui.c: Fix indentation. * python/py-unwind.c: Fix indentation. * python/py-value.c: Fix indentation. * python/py-xmethods.c: Fix indentation. * python/python-internal.h: Fix indentation. * python/python.c: Fix indentation. * ravenscar-thread.c: Fix indentation. * record-btrace.c: Fix indentation. * record-full.c: Fix indentation. * record.c: Fix indentation. * reggroups.c: Fix indentation. * regset.h: Fix indentation. * remote-fileio.c: Fix indentation. * remote.c: Fix indentation. * reverse.c: Fix indentation. * riscv-linux-tdep.c: Fix indentation. * riscv-ravenscar-thread.c: Fix indentation. * riscv-tdep.c: Fix indentation. * rl78-tdep.c: Fix indentation. * rs6000-aix-tdep.c: Fix indentation. * rs6000-lynx178-tdep.c: Fix indentation. * rs6000-nat.c: Fix indentation. * rs6000-tdep.c: Fix indentation. * rust-lang.c: Fix indentation. * rx-tdep.c: Fix indentation. * s12z-tdep.c: Fix indentation. * s390-linux-tdep.c: Fix indentation. * score-tdep.c: Fix indentation. * ser-base.c: Fix indentation. * ser-mingw.c: Fix indentation. * ser-uds.c: Fix indentation. * ser-unix.c: Fix indentation. * serial.c: Fix indentation. * sh-linux-tdep.c: Fix indentation. * sh-nbsd-tdep.c: Fix indentation. * sh-tdep.c: Fix indentation. * skip.c: Fix indentation. * sol-thread.c: Fix indentation. * solib-aix.c: Fix indentation. * solib-darwin.c: Fix indentation. * solib-frv.c: Fix indentation. * solib-svr4.c: Fix indentation. * solib.c: Fix indentation. * source.c: Fix indentation. * sparc-linux-tdep.c: Fix indentation. * sparc-nbsd-tdep.c: Fix indentation. * sparc-obsd-tdep.c: Fix indentation. * sparc-ravenscar-thread.c: Fix indentation. * sparc-tdep.c: Fix indentation. * sparc64-linux-tdep.c: Fix indentation. * sparc64-nbsd-tdep.c: Fix indentation. * sparc64-obsd-tdep.c: Fix indentation. * sparc64-tdep.c: Fix indentation. * stabsread.c: Fix indentation. * stack.c: Fix indentation. * stap-probe.c: Fix indentation. * stubs/ia64vms-stub.c: Fix indentation. * stubs/m32r-stub.c: Fix indentation. * stubs/m68k-stub.c: Fix indentation. * stubs/sh-stub.c: Fix indentation. * stubs/sparc-stub.c: Fix indentation. * symfile-mem.c: Fix indentation. * symfile.c: Fix indentation. * symfile.h: Fix indentation. * symmisc.c: Fix indentation. * symtab.c: Fix indentation. * symtab.h: Fix indentation. * target-float.c: Fix indentation. * target.c: Fix indentation. * target.h: Fix indentation. * tic6x-tdep.c: Fix indentation. * tilegx-linux-tdep.c: Fix indentation. * tilegx-tdep.c: Fix indentation. * top.c: Fix indentation. * tracefile-tfile.c: Fix indentation. * tracepoint.c: Fix indentation. * tui/tui-disasm.c: Fix indentation. * tui/tui-io.c: Fix indentation. * tui/tui-regs.c: Fix indentation. * tui/tui-stack.c: Fix indentation. * tui/tui-win.c: Fix indentation. * tui/tui-winsource.c: Fix indentation. * tui/tui.c: Fix indentation. * typeprint.c: Fix indentation. * ui-out.h: Fix indentation. * unittests/copy_bitwise-selftests.c: Fix indentation. * unittests/memory-map-selftests.c: Fix indentation. * utils.c: Fix indentation. * v850-tdep.c: Fix indentation. * valarith.c: Fix indentation. * valops.c: Fix indentation. * valprint.c: Fix indentation. * valprint.h: Fix indentation. * value.c: Fix indentation. * value.h: Fix indentation. * varobj.c: Fix indentation. * vax-tdep.c: Fix indentation. * windows-nat.c: Fix indentation. * windows-tdep.c: Fix indentation. * xcoffread.c: Fix indentation. * xml-syscall.c: Fix indentation. * xml-tdesc.c: Fix indentation. * xstormy16-tdep.c: Fix indentation. * xtensa-config.c: Fix indentation. * xtensa-linux-nat.c: Fix indentation. * xtensa-linux-tdep.c: Fix indentation. * xtensa-tdep.c: Fix indentation. gdbserver/ChangeLog: * ax.cc: Fix indentation. * dll.cc: Fix indentation. * inferiors.h: Fix indentation. * linux-low.cc: Fix indentation. * linux-nios2-low.cc: Fix indentation. * linux-ppc-ipa.cc: Fix indentation. * linux-ppc-low.cc: Fix indentation. * linux-x86-low.cc: Fix indentation. * linux-xtensa-low.cc: Fix indentation. * regcache.cc: Fix indentation. * server.cc: Fix indentation. * tracepoint.cc: Fix indentation. gdbsupport/ChangeLog: * common-exceptions.h: Fix indentation. * event-loop.cc: Fix indentation. * fileio.cc: Fix indentation. * filestuff.cc: Fix indentation. * gdb-dlfcn.cc: Fix indentation. * gdb_string_view.h: Fix indentation. * job-control.cc: Fix indentation. * signals.cc: Fix indentation. Change-Id: I4bad7ae6be0fbe14168b8ebafb98ffe14964a695
2020-11-02 23:26:14 +08:00
address, or else to a glink stub. As the latter carry synthetic @plt
symbols, find_solib_trampoline_target should be able to resolve them. */
Skip-trampoline for PowerPC reverse-stepping.
2015-01-17 14:30:59 +08:00
target = find_solib_trampoline_target (frame, pc);
return target ? target : pc;
}
return 0;
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
}
[ppc64le] Use skip_entrypoint for skip_trampoline_code ppc64le loses control when stepping between two PLT-called functions inside a shared library: 29 shlib_second (); /* first-hit */^M (gdb) PASS: gdb.base/solib-intra-step.exp: first-hit step^M ^M Program received signal SIGABRT, Aborted.^M 0x00003fffb7cbe578 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56^M 56 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);^M (gdb) FAIL: gdb.base/solib-intra-step.exp: second-hit -> 29 shlib_second (); /* first-hit */^M (gdb) PASS: gdb.base/solib-intra-step.exp: first-hit step^M shlib_second () at ./gdb.base/solib-intra-step-lib.c:23^M 23 abort (); /* second-hit */^M (gdb) PASS: gdb.base/solib-intra-step.exp: second-hit This is because gdbarch_skip_trampoline_code() will resolve the final function as shlib_second+0 and place there the breakpoint, but ld.so will jump after the breakpoint - at shlib_second+8 - as it is ELFv2 local symbol optimization: Dump of assembler code for function shlib_second: 0x0000000000000804 <+0>: addis r2,r12,2 0x0000000000000808 <+4>: addi r2,r2,30668 0x000000000000080c <+8>: mflr r0 Currently gdbarch_skip_entrypoint() has been called in skip_prologue_sal() and fill_in_stop_func() but that is not enough. I believe gdbarch_skip_entrypoint() should be called after every gdbarch_skip_trampoline_code(). gdb/ChangeLog 2015-09-15 Jan Kratochvil <jan.kratochvil@redhat.com> * linespec.c (minsym_found): Call gdbarch_skip_entrypoint. * ppc64-tdep.c (ppc64_skip_trampoline_code): Rename to ... (ppc64_skip_trampoline_code_1): ... here. (ppc64_skip_trampoline_code): New wrapper function. * symtab.c (find_function_start_sal): Call gdbarch_skip_entrypoint. gdb/testsuite/ChangeLog 2015-09-15 Jan Kratochvil <jan.kratochvil@redhat.com> * gdb.opt/solib-intra-step-lib.c: New file. * gdb.opt/solib-intra-step-main.c: New file. * gdb.opt/solib-intra-step.exp: New file.
2015-09-16 01:08:04 +08:00
/* Wrapper of ppc64_skip_trampoline_code_1 checking also
ppc_elfv2_skip_entrypoint. */
CORE_ADDR
gdb: pass frames as `const frame_info_ptr &` We currently pass frames to function by value, as `frame_info_ptr`. This is somewhat expensive: - the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass by value - the constructors and destructor link/unlink the object in the global `frame_info_ptr::frame_list` list. This is an `intrusive_list`, so it's not so bad: it's just assigning a few points, there's no memory allocation as if it was `std::list`, but still it's useless to do that over and over. As suggested by Tom Tromey, change many function signatures to accept `const frame_info_ptr &` instead of `frame_info_ptr`. Some functions reassign their `frame_info_ptr` parameter, like: void the_func (frame_info_ptr frame) { for (; frame != nullptr; frame = get_prev_frame (frame)) { ... } } I wondered what to do about them, do I leave them as-is or change them (and need to introduce a separate local variable that can be re-assigned). I opted for the later for consistency. It might not be clear why some functions take `const frame_info_ptr &` while others take `frame_info_ptr`. Also, if a function took a `frame_info_ptr` because it did re-assign its parameter, I doubt that we would think to change it to `const frame_info_ptr &` should the implementation change such that it doesn't need to take `frame_info_ptr` anymore. It seems better to have a simple rule and apply it everywhere. Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0 Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
ppc64_skip_trampoline_code (const frame_info_ptr &frame, CORE_ADDR pc)
[ppc64le] Use skip_entrypoint for skip_trampoline_code ppc64le loses control when stepping between two PLT-called functions inside a shared library: 29 shlib_second (); /* first-hit */^M (gdb) PASS: gdb.base/solib-intra-step.exp: first-hit step^M ^M Program received signal SIGABRT, Aborted.^M 0x00003fffb7cbe578 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56^M 56 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);^M (gdb) FAIL: gdb.base/solib-intra-step.exp: second-hit -> 29 shlib_second (); /* first-hit */^M (gdb) PASS: gdb.base/solib-intra-step.exp: first-hit step^M shlib_second () at ./gdb.base/solib-intra-step-lib.c:23^M 23 abort (); /* second-hit */^M (gdb) PASS: gdb.base/solib-intra-step.exp: second-hit This is because gdbarch_skip_trampoline_code() will resolve the final function as shlib_second+0 and place there the breakpoint, but ld.so will jump after the breakpoint - at shlib_second+8 - as it is ELFv2 local symbol optimization: Dump of assembler code for function shlib_second: 0x0000000000000804 <+0>: addis r2,r12,2 0x0000000000000808 <+4>: addi r2,r2,30668 0x000000000000080c <+8>: mflr r0 Currently gdbarch_skip_entrypoint() has been called in skip_prologue_sal() and fill_in_stop_func() but that is not enough. I believe gdbarch_skip_entrypoint() should be called after every gdbarch_skip_trampoline_code(). gdb/ChangeLog 2015-09-15 Jan Kratochvil <jan.kratochvil@redhat.com> * linespec.c (minsym_found): Call gdbarch_skip_entrypoint. * ppc64-tdep.c (ppc64_skip_trampoline_code): Rename to ... (ppc64_skip_trampoline_code_1): ... here. (ppc64_skip_trampoline_code): New wrapper function. * symtab.c (find_function_start_sal): Call gdbarch_skip_entrypoint. gdb/testsuite/ChangeLog 2015-09-15 Jan Kratochvil <jan.kratochvil@redhat.com> * gdb.opt/solib-intra-step-lib.c: New file. * gdb.opt/solib-intra-step-main.c: New file. * gdb.opt/solib-intra-step.exp: New file.
2015-09-16 01:08:04 +08:00
{
struct gdbarch *gdbarch = get_frame_arch (frame);
pc = ppc64_skip_trampoline_code_1 (frame, pc);
if (pc != 0 && gdbarch_skip_entrypoint_p (gdbarch))
pc = gdbarch_skip_entrypoint (gdbarch, pc);
return pc;
}
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* Support for convert_from_func_ptr_addr (ARCH, ADDR, TARG) on PPC64
GNU/Linux.
Usually a function pointer's representation is simply the address
of the function. On GNU/Linux on the PowerPC however, a function
pointer may be a pointer to a function descriptor.
For PPC64, a function descriptor is a TOC entry, in a data section,
which contains three words: the first word is the address of the
function, the second word is the TOC pointer (r2), and the third word
is the static chain value.
Throughout GDB it is currently assumed that a function pointer contains
the address of the function, which is not easy to fix. In addition, the
conversion of a function address to a function pointer would
require allocation of a TOC entry in the inferior's memory space,
with all its drawbacks. To be able to call C++ virtual methods in
the inferior (which are called via function pointers),
find_function_addr uses this function to get the function address
from a function pointer.
If ADDR points at what is clearly a function descriptor, transform
it into the address of the corresponding function, if needed. Be
conservative, otherwise GDB will do the transformation on any
random addresses such as occur when there is no symbol table. */
CORE_ADDR
ppc64_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
CORE_ADDR addr,
struct target_ops *targ)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb: spread a little 'const' through the target_section_table code The code to access the target section table can be made more const, so lets do that. There should be no user visible changes after this commit. gdb/ChangeLog: * gdb/bfd-target.c (class target_bfd) <get_section_table>: Make return type const. * gdb/exec.c (struct exec_target) <get_section_table>: Likewise. (section_table_read_available_memory): Make local const. (exec_target::xfer_partial): Make local const. (print_section_info): Make parameter const. * gdb/exec.h (print_section_info): Likewise. * gdb/ppc64-tdep.c (ppc64_convert_from_func_ptr_addr): Make local const. * gdb/record-btrace.c (record_btrace_target::xfer_partial): Likewise. * gdb/remote.c (remote_target::remote_xfer_live_readonly_partial): Likewise. * gdb/s390-tdep.c (s390_load): Likewise. * gdb/solib-dsbt.c (scan_dyntag): Likewise. * gdb/solib-svr4.c (scan_dyntag): Likewise. * gdb/target-debug.h (target_debug_print_target_section_table_p): Rename to... (target_debug_print_const_target_section_table_p): ...this. * gdb/target-delegates.c: Regenerate. * gdb/target.c (target_get_section_table): Make return type const. (target_section_by_addr): Likewise. Also make some locals const. (memory_xfer_partial_1): Make some locals const. * gdb/target.h (struct target_ops) <get_section_table>: Make return type const. (target_section_by_addr): Likewise. (target_get_section_table): Likewise.
2021-02-12 19:39:23 +08:00
const struct target_section *s = target_section_by_addr (targ, addr);
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
/* Check if ADDR points to a function descriptor. */
if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
{
/* There may be relocations that need to be applied to the .opd
section. Unfortunately, this function may be called at a time
where these relocations have not yet been performed -- this can
happen for example shortly after a library has been loaded with
dlopen, but ld.so has not yet applied the relocations.
To cope with both the case where the relocation has been applied,
and the case where it has not yet been applied, we do *not* read
the (maybe) relocated value from target memory, but we instead
read the non-relocated value from the BFD, and apply the relocation
offset manually.
This makes the assumption that all .opd entries are always relocated
by the same offset the section itself was relocated. This should
always be the case for GNU/Linux executables and shared libraries.
Note that other kind of object files (e.g. those added via
add-symbol-files) will currently never end up here anyway, as this
function accesses *target* sections only; only the main exec and
shared libraries are ever added to the target. */
gdb_byte buf[8];
int res;
* nto-tdep.c (nto_relocate_section_addresses): Update, target_section.bfd deleted. * ppc64-tdep.c (ppc64_convert_from_func_ptr_addr): Ditto. * s390-tdep.c (s390_load): Ditto. * solib-aix.c (solib_aix_relocate_section_addresses): Ditto.
2013-07-17 13:28:04 +08:00
res = bfd_get_section_contents (s->the_bfd_section->owner,
s->the_bfd_section,
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
&buf, addr - s->addr, 8);
if (res != 0)
bfd_section_* macros This large patch removes the unnecessary bfd parameter from various bfd section macros and functions. The bfd is hardly ever used and if needed for the bfd_set_section_* or bfd_rename_section functions can be found via section->owner except for the com, und, abs, and ind std_section special sections. Those sections shouldn't be modified anyway. The patch also removes various bfd_get_section_<field> macros, replacing their use with bfd_section_<field>, and adds bfd_set_section_lma. I've also fixed a minor bug in gas where compressed section renaming was done directly rather than calling bfd_rename_section. This would have broken bfd_get_section_by_name and similar functions, but that hardly mattered at such a late stage in gas processing. bfd/ * bfd-in.h (bfd_get_section_name, bfd_get_section_vma), (bfd_get_section_lma, bfd_get_section_alignment), (bfd_get_section_size, bfd_get_section_flags), (bfd_get_section_userdata): Delete. (bfd_section_name, bfd_section_size, bfd_section_vma), (bfd_section_lma, bfd_section_alignment): Lose bfd parameter. (bfd_section_flags, bfd_section_userdata): New. (bfd_is_com_section): Rename parameter. * section.c (bfd_set_section_userdata, bfd_set_section_vma), (bfd_set_section_alignment, bfd_set_section_flags, bfd_rename_section), (bfd_set_section_size): Delete bfd parameter, rename section parameter. (bfd_set_section_lma): New. * bfd-in2.h: Regenerate. * mach-o.c (bfd_mach_o_init_section_from_mach_o): Delete bfd param, update callers. * aoutx.h, * bfd.c, * coff-alpha.c, * coff-arm.c, * coff-mips.c, * coff64-rs6000.c, * coffcode.h, * coffgen.c, * cofflink.c, * compress.c, * ecoff.c, * elf-eh-frame.c, * elf-hppa.h, * elf-ifunc.c, * elf-m10200.c, * elf-m10300.c, * elf-properties.c, * elf-s390-common.c, * elf-vxworks.c, * elf.c, * elf32-arc.c, * elf32-arm.c, * elf32-avr.c, * elf32-bfin.c, * elf32-cr16.c, * elf32-cr16c.c, * elf32-cris.c, * elf32-crx.c, * elf32-csky.c, * elf32-d10v.c, * elf32-epiphany.c, * elf32-fr30.c, * elf32-frv.c, * elf32-ft32.c, * elf32-h8300.c, * elf32-hppa.c, * elf32-i386.c, * elf32-ip2k.c, * elf32-iq2000.c, * elf32-lm32.c, * elf32-m32c.c, * elf32-m32r.c, * elf32-m68hc1x.c, * elf32-m68k.c, * elf32-mcore.c, * elf32-mep.c, * elf32-metag.c, * elf32-microblaze.c, * elf32-moxie.c, * elf32-msp430.c, * elf32-mt.c, * elf32-nds32.c, * elf32-nios2.c, * elf32-or1k.c, * elf32-ppc.c, * elf32-pru.c, * elf32-rl78.c, * elf32-rx.c, * elf32-s390.c, * elf32-score.c, * elf32-score7.c, * elf32-sh.c, * elf32-spu.c, * elf32-tic6x.c, * elf32-tilepro.c, * elf32-v850.c, * elf32-vax.c, * elf32-visium.c, * elf32-xstormy16.c, * elf32-xtensa.c, * elf64-alpha.c, * elf64-bpf.c, * elf64-hppa.c, * elf64-ia64-vms.c, * elf64-mmix.c, * elf64-ppc.c, * elf64-s390.c, * elf64-sparc.c, * elf64-x86-64.c, * elflink.c, * elfnn-aarch64.c, * elfnn-ia64.c, * elfnn-riscv.c, * elfxx-aarch64.c, * elfxx-mips.c, * elfxx-sparc.c, * elfxx-tilegx.c, * elfxx-x86.c, * i386msdos.c, * linker.c, * mach-o.c, * mmo.c, * opncls.c, * pdp11.c, * pei-x86_64.c, * peicode.h, * reloc.c, * section.c, * syms.c, * vms-alpha.c, * xcofflink.c: Update throughout for bfd section macro and function changes. binutils/ * addr2line.c, * bucomm.c, * coffgrok.c, * dlltool.c, * nm.c, * objcopy.c, * objdump.c, * od-elf32_avr.c, * od-macho.c, * od-xcoff.c, * prdbg.c, * rdcoff.c, * rddbg.c, * rescoff.c, * resres.c, * size.c, * srconv.c, * strings.c, * windmc.c: Update throughout for bfd section macro and function changes. gas/ * as.c, * as.h, * dw2gencfi.c, * dwarf2dbg.c, * ecoff.c, * read.c, * stabs.c, * subsegs.c, * subsegs.h, * write.c, * config/obj-coff-seh.c, * config/obj-coff.c, * config/obj-ecoff.c, * config/obj-elf.c, * config/obj-macho.c, * config/obj-som.c, * config/tc-aarch64.c, * config/tc-alpha.c, * config/tc-arc.c, * config/tc-arm.c, * config/tc-avr.c, * config/tc-bfin.c, * config/tc-bpf.c, * config/tc-d10v.c, * config/tc-d30v.c, * config/tc-epiphany.c, * config/tc-fr30.c, * config/tc-frv.c, * config/tc-h8300.c, * config/tc-hppa.c, * config/tc-i386.c, * config/tc-ia64.c, * config/tc-ip2k.c, * config/tc-iq2000.c, * config/tc-lm32.c, * config/tc-m32c.c, * config/tc-m32r.c, * config/tc-m68hc11.c, * config/tc-mep.c, * config/tc-microblaze.c, * config/tc-mips.c, * config/tc-mmix.c, * config/tc-mn10200.c, * config/tc-mn10300.c, * config/tc-msp430.c, * config/tc-mt.c, * config/tc-nds32.c, * config/tc-or1k.c, * config/tc-ppc.c, * config/tc-pru.c, * config/tc-rl78.c, * config/tc-rx.c, * config/tc-s12z.c, * config/tc-s390.c, * config/tc-score.c, * config/tc-score7.c, * config/tc-sh.c, * config/tc-sparc.c, * config/tc-spu.c, * config/tc-tic4x.c, * config/tc-tic54x.c, * config/tc-tic6x.c, * config/tc-tilegx.c, * config/tc-tilepro.c, * config/tc-v850.c, * config/tc-visium.c, * config/tc-wasm32.c, * config/tc-xc16x.c, * config/tc-xgate.c, * config/tc-xstormy16.c, * config/tc-xtensa.c, * config/tc-z8k.c: Update throughout for bfd section macro and function changes. * write.c (compress_debug): Use bfd_rename_section. gdb/ * aarch64-linux-tdep.c, * arm-tdep.c, * auto-load.c, * coff-pe-read.c, * coffread.c, * corelow.c, * dbxread.c, * dicos-tdep.c, * dwarf2-frame.c, * dwarf2read.c, * elfread.c, * exec.c, * fbsd-tdep.c, * gcore.c, * gdb_bfd.c, * gdb_bfd.h, * hppa-tdep.c, * i386-cygwin-tdep.c, * i386-fbsd-tdep.c, * i386-linux-tdep.c, * jit.c, * linux-tdep.c, * machoread.c, * maint.c, * mdebugread.c, * minidebug.c, * mips-linux-tdep.c, * mips-sde-tdep.c, * mips-tdep.c, * mipsread.c, * nto-tdep.c, * objfiles.c, * objfiles.h, * osabi.c, * ppc-linux-tdep.c, * ppc64-tdep.c, * record-btrace.c, * record-full.c, * remote.c, * rs6000-aix-tdep.c, * rs6000-tdep.c, * s390-linux-tdep.c, * s390-tdep.c, * solib-aix.c, * solib-dsbt.c, * solib-frv.c, * solib-spu.c, * solib-svr4.c, * solib-target.c, * spu-linux-nat.c, * spu-tdep.c, * symfile-mem.c, * symfile.c, * symmisc.c, * symtab.c, * target.c, * windows-nat.c, * xcoffread.c, * cli/cli-dump.c, * compile/compile-object-load.c, * mi/mi-interp.c: Update throughout for bfd section macro and function changes. * gcore (gcore_create_callback): Use bfd_set_section_lma. * spu-tdep.c (spu_overlay_new_objfile): Likewise. gprof/ * corefile.c, * symtab.c: Update throughout for bfd section macro and function changes. ld/ * ldcref.c, * ldctor.c, * ldelf.c, * ldlang.c, * pe-dll.c, * emultempl/aarch64elf.em, * emultempl/aix.em, * emultempl/armcoff.em, * emultempl/armelf.em, * emultempl/cr16elf.em, * emultempl/cskyelf.em, * emultempl/m68hc1xelf.em, * emultempl/m68kelf.em, * emultempl/mipself.em, * emultempl/mmix-elfnmmo.em, * emultempl/mmo.em, * emultempl/msp430.em, * emultempl/nios2elf.em, * emultempl/pe.em, * emultempl/pep.em, * emultempl/ppc64elf.em, * emultempl/xtensaelf.em: Update throughout for bfd section macro and function changes. libctf/ * ctf-open-bfd.c: Update throughout for bfd section macro changes. opcodes/ * arc-ext.c: Update throughout for bfd section macro changes. sim/ * common/sim-load.c, * common/sim-utils.c, * cris/sim-if.c, * erc32/func.c, * lm32/sim-if.c, * m32c/load.c, * m32c/trace.c, * m68hc11/interp.c, * ppc/hw_htab.c, * ppc/hw_init.c, * rl78/load.c, * rl78/trace.c, * rx/gdb-if.c, * rx/load.c, * rx/trace.c: Update throughout for bfd section macro changes.
2019-09-16 18:55:17 +08:00
return (extract_unsigned_integer (buf, 8, byte_order)
- bfd_section_vma (s->the_bfd_section) + s->addr);
Add missing file from the previous commit.
2013-02-02 04:59:08 +08:00
}
return addr;
}
* elfread.c (elf_symtab_read): Do not use udata.p here to find symbol size. * ppc64-tdep.c (ppc64_elf_make_msymbol_special): New function. * ppc64-tdep.h (ppc64_elf_make_msymbol_special): Declare. * ppc-linux-tdep.c (ppc_linux_init_abi): Set up to use the above. * ppcfbsd-tdep.c (ppcfbsd_init_abi): Likewise.
2013-02-23 07:24:24 +08:00
/* A synthetic 'dot' symbols on ppc64 has the udata.p entry pointing
back to the original ELF symbol it was derived from. Get the size
from that symbol. */
void
ppc64_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
{
if ((sym->flags & BSF_SYNTHETIC) != 0 && sym->udata.p != NULL)
{
elf_symbol_type *elf_sym = (elf_symbol_type *) sym->udata.p;
gdb: remove minimal symbol size macros Remove MSYMBOL_HAS_SIZE, MSYMBOL_SIZE and SET_MSYMBOL_SIZE, replace them with equivalent methods. Change-Id: I6ee1cf82df37e58dff52ea6568ceb4649c7d7538
2022-01-28 23:41:49 +08:00
msym->set_size (elf_sym->internal_elf_sym.st_size);
* elfread.c (elf_symtab_read): Do not use udata.p here to find symbol size. * ppc64-tdep.c (ppc64_elf_make_msymbol_special): New function. * ppc64-tdep.h (ppc64_elf_make_msymbol_special): Declare. * ppc-linux-tdep.c (ppc_linux_init_abi): Set up to use the above. * ppcfbsd-tdep.c (ppcfbsd_init_abi): Likewise.
2013-02-23 07:24:24 +08:00
}
}
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