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https://sourceware.org/git/binutils-gdb.git
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f34652de0b
Currently, every internal_error call must be passed __FILE__/__LINE__
explicitly, like:
internal_error (__FILE__, __LINE__, "foo %d", var);
The need to pass in explicit __FILE__/__LINE__ is there probably
because the function predates widespread and portable variadic macros
availability. We can use variadic macros nowadays, and in fact, we
already use them in several places, including the related
gdb_assert_not_reached.
So this patch renames the internal_error function to something else,
and then reimplements internal_error as a variadic macro that expands
__FILE__/__LINE__ itself.
The result is that we now should call internal_error like so:
internal_error ("foo %d", var);
Likewise for internal_warning.
The patch adjusts all calls sites. 99% of the adjustments were done
with a perl/sed script.
The non-mechanical changes are in gdbsupport/errors.h,
gdbsupport/gdb_assert.h, and gdb/gdbarch.py.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
Change-Id: Ia6f372c11550ca876829e8fd85048f4502bdcf06
259 lines
7.5 KiB
C++
259 lines
7.5 KiB
C++
/* GNU/Linux/PowerPC specific low level interface, for the in-process
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agent library for GDB.
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Copyright (C) 2016-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include <sys/mman.h>
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#include "tracepoint.h"
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#include "arch/ppc-linux-tdesc.h"
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#include "linux-ppc-tdesc-init.h"
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#include <elf.h>
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#ifdef HAVE_GETAUXVAL
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#include <sys/auxv.h>
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#endif
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/* These macros define the position of registers in the buffer collected
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by the fast tracepoint jump pad. */
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#define FT_CR_R0 0
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#define FT_CR_CR 32
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#define FT_CR_XER 33
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#define FT_CR_LR 34
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#define FT_CR_CTR 35
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#define FT_CR_PC 36
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#define FT_CR_GPR(n) (FT_CR_R0 + (n))
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static const int ppc_ft_collect_regmap[] = {
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/* GPRs */
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FT_CR_GPR (0), FT_CR_GPR (1), FT_CR_GPR (2),
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FT_CR_GPR (3), FT_CR_GPR (4), FT_CR_GPR (5),
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FT_CR_GPR (6), FT_CR_GPR (7), FT_CR_GPR (8),
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FT_CR_GPR (9), FT_CR_GPR (10), FT_CR_GPR (11),
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FT_CR_GPR (12), FT_CR_GPR (13), FT_CR_GPR (14),
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FT_CR_GPR (15), FT_CR_GPR (16), FT_CR_GPR (17),
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FT_CR_GPR (18), FT_CR_GPR (19), FT_CR_GPR (20),
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FT_CR_GPR (21), FT_CR_GPR (22), FT_CR_GPR (23),
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FT_CR_GPR (24), FT_CR_GPR (25), FT_CR_GPR (26),
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FT_CR_GPR (27), FT_CR_GPR (28), FT_CR_GPR (29),
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FT_CR_GPR (30), FT_CR_GPR (31),
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/* FPRs - not collected. */
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-1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1,
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FT_CR_PC, /* PC */
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-1, /* MSR */
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FT_CR_CR, /* CR */
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FT_CR_LR, /* LR */
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FT_CR_CTR, /* CTR */
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FT_CR_XER, /* XER */
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-1, /* FPSCR */
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};
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#define PPC_NUM_FT_COLLECT_GREGS \
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(sizeof (ppc_ft_collect_regmap) / sizeof(ppc_ft_collect_regmap[0]))
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/* Supply registers collected by the fast tracepoint jump pad.
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BUF is the second argument we pass to gdb_collect in jump pad. */
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void
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supply_fast_tracepoint_registers (struct regcache *regcache,
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const unsigned char *buf)
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{
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int i;
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for (i = 0; i < PPC_NUM_FT_COLLECT_GREGS; i++)
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{
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if (ppc_ft_collect_regmap[i] == -1)
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continue;
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supply_register (regcache, i,
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((char *) buf)
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+ ppc_ft_collect_regmap[i] * sizeof (long));
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}
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}
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/* Return the value of register REGNUM. RAW_REGS is collected buffer
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by jump pad. This function is called by emit_reg. */
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ULONGEST
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get_raw_reg (const unsigned char *raw_regs, int regnum)
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{
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if (regnum >= PPC_NUM_FT_COLLECT_GREGS)
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return 0;
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if (ppc_ft_collect_regmap[regnum] == -1)
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return 0;
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return *(unsigned long *) (raw_regs
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+ ppc_ft_collect_regmap[regnum] * sizeof (long));
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}
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/* Allocate buffer for the jump pads. The branch instruction has a reach
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of +/- 32MiB, and the executable is loaded at 0x10000000 (256MiB).
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64-bit: To maximize the area of executable that can use tracepoints,
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try allocating at 0x10000000 - size initially, decreasing until we hit
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a free area.
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32-bit: ld.so loads dynamic libraries right below the executable, so
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we cannot depend on that area (dynamic libraries can be quite large).
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Instead, aim right after the executable - at sbrk(0). This will
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cause future brk to fail, and malloc will fallback to mmap. */
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void *
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alloc_jump_pad_buffer (size_t size)
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{
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#ifdef __powerpc64__
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uintptr_t addr;
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uintptr_t exec_base = getauxval (AT_PHDR);
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int pagesize;
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void *res;
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if (exec_base == 0)
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exec_base = 0x10000000;
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pagesize = sysconf (_SC_PAGE_SIZE);
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if (pagesize == -1)
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perror_with_name ("sysconf");
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addr = exec_base - size;
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/* size should already be page-aligned, but this can't hurt. */
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addr &= ~(pagesize - 1);
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/* Search for a free area. If we hit 0, we're out of luck. */
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for (; addr; addr -= pagesize)
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{
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/* No MAP_FIXED - we don't want to zap someone's mapping. */
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res = mmap ((void *) addr, size,
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PROT_READ | PROT_WRITE | PROT_EXEC,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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/* If we got what we wanted, return. */
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if ((uintptr_t) res == addr)
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return res;
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/* If we got a mapping, but at a wrong address, undo it. */
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if (res != MAP_FAILED)
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munmap (res, size);
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}
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return NULL;
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#else
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void *target = sbrk (0);
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void *res = mmap (target, size, PROT_READ | PROT_WRITE | PROT_EXEC,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if (res == target)
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return res;
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if (res != MAP_FAILED)
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munmap (res, size);
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return NULL;
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#endif
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}
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/* Return target_desc to use for IPA, given the tdesc index passed by
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gdbserver. */
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const struct target_desc *
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get_ipa_tdesc (int idx)
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{
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switch (idx)
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{
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#ifdef __powerpc64__
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case PPC_TDESC_BASE:
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return tdesc_powerpc_64l;
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case PPC_TDESC_ALTIVEC:
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return tdesc_powerpc_altivec64l;
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case PPC_TDESC_VSX:
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return tdesc_powerpc_vsx64l;
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case PPC_TDESC_ISA205:
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return tdesc_powerpc_isa205_64l;
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case PPC_TDESC_ISA205_ALTIVEC:
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return tdesc_powerpc_isa205_altivec64l;
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case PPC_TDESC_ISA205_VSX:
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return tdesc_powerpc_isa205_vsx64l;
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case PPC_TDESC_ISA205_PPR_DSCR_VSX:
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return tdesc_powerpc_isa205_ppr_dscr_vsx64l;
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case PPC_TDESC_ISA207_VSX:
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return tdesc_powerpc_isa207_vsx64l;
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case PPC_TDESC_ISA207_HTM_VSX:
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return tdesc_powerpc_isa207_htm_vsx64l;
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#else
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case PPC_TDESC_BASE:
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return tdesc_powerpc_32l;
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case PPC_TDESC_ALTIVEC:
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return tdesc_powerpc_altivec32l;
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case PPC_TDESC_VSX:
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return tdesc_powerpc_vsx32l;
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case PPC_TDESC_ISA205:
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return tdesc_powerpc_isa205_32l;
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case PPC_TDESC_ISA205_ALTIVEC:
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return tdesc_powerpc_isa205_altivec32l;
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case PPC_TDESC_ISA205_VSX:
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return tdesc_powerpc_isa205_vsx32l;
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case PPC_TDESC_ISA205_PPR_DSCR_VSX:
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return tdesc_powerpc_isa205_ppr_dscr_vsx32l;
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case PPC_TDESC_ISA207_VSX:
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return tdesc_powerpc_isa207_vsx32l;
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case PPC_TDESC_ISA207_HTM_VSX:
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return tdesc_powerpc_isa207_htm_vsx32l;
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case PPC_TDESC_E500:
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return tdesc_powerpc_e500l;
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#endif
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default:
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internal_error ("unknown ipa tdesc index: %d", idx);
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#ifdef __powerpc64__
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return tdesc_powerpc_64l;
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#else
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return tdesc_powerpc_32l;
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#endif
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}
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}
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/* Initialize ipa_tdesc and others. */
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void
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initialize_low_tracepoint (void)
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{
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#ifdef __powerpc64__
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init_registers_powerpc_64l ();
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init_registers_powerpc_altivec64l ();
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init_registers_powerpc_vsx64l ();
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init_registers_powerpc_isa205_64l ();
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init_registers_powerpc_isa205_altivec64l ();
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init_registers_powerpc_isa205_vsx64l ();
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init_registers_powerpc_isa205_ppr_dscr_vsx64l ();
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init_registers_powerpc_isa207_vsx64l ();
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init_registers_powerpc_isa207_htm_vsx64l ();
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#else
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init_registers_powerpc_32l ();
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init_registers_powerpc_altivec32l ();
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init_registers_powerpc_vsx32l ();
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init_registers_powerpc_isa205_32l ();
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init_registers_powerpc_isa205_altivec32l ();
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init_registers_powerpc_isa205_vsx32l ();
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init_registers_powerpc_isa205_ppr_dscr_vsx32l ();
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init_registers_powerpc_isa207_vsx32l ();
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init_registers_powerpc_isa207_htm_vsx32l ();
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init_registers_powerpc_e500l ();
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#endif
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}
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