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Port GDB to Hurd x86_64.

Browse Source 
This port extends the existing i686 port to support x86_64 by reusing
existing code whenever it makes sense.

* gdb/amd64-gnu-tdep.c: Adds logic for handling signal frames and
  position of amd64 registers in the different Hurd structs.
  The signal code is very similar to i686, except the trampoline code
  is adapted.
* gdb/config/i386/nm-i386gnu.h: renamed to gdb/config/i386/nm-x86-gnu.h
  and adapt it for x86_64.
* gdb/config/i386/i386gnu.mn: renamed to gdb/config/i386/nm-x86-gnu.mn
  and reuse it for x86_64.
* gdb/configure.host: recognize gnu64 as a host.
* gdb/configure.nat: recognize gnu64 host and update existing i386gnu to
  reuse the new shared files.
* gdb/configure.tgt: recognize x86_64-*-gnu* triplet and use
  amd64-gnu-tdep.c.
* gdb/i386-gnu-tdep.c: added i386_gnu_thread_state_reg_offset that is
  copied from i386-gnu-nat.c. This makes it similar to amd64.
* gdb/i386-gnu-nat.c: rename it to x86-gnu-nat.c since we reuse this for
  i386 and amd64. Updated REG_ADDR to use one of the structures. Added
  VALID_REGISTER to make sure it's a register we can provide at this time
  (not all of them are available in amd64). FLAGS_REGISTER is either rfl
  or efl depending on the arch. Renamed functions and class from i386 to x86
  whenever they can be reused.

Tested on Hurd x86_64 and i686.
This commit is contained in:
Flavio Cruz 2025-02-02 23:15:22 -05:00 committed by Samuel Thibault
parent 8eca085f0a
commit 5110839934
9 changed files with 403 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gdb/Makefile.in
View File

@ -741,6 +741,7 @@ ALL_64_TARGET_OBS = \
amd64-darwin-tdep.o \
amd64-dicos-tdep.o \
amd64-fbsd-tdep.o \
amd64-gnu-tdep.o \
amd64-linux-tdep.o \
amd64-netbsd-tdep.o \
amd64-obsd-tdep.o \
@ -1700,6 +1701,7 @@ ALLDEPFILES = \
amd64-dicos-tdep.c \
amd64-fbsd-nat.c \
amd64-fbsd-tdep.c \
amd64-gnu-tdep.c \
amd64-linux-nat.c \
amd64-linux-tdep.c \
amd64-nat.c \
@ -1755,7 +1757,6 @@ ALLDEPFILES = \
i386-dicos-tdep.c \
i386-fbsd-nat.c \
i386-fbsd-tdep.c \
i386-gnu-nat.c \
i386-gnu-tdep.c \
i386-linux-nat.c \
i386-linux-tdep.c \
@ -1882,6 +1883,7 @@ ALLDEPFILES = \
vax-tdep.c \
windows-nat.c \
windows-tdep.c \
x86-gnu-nat.c \
x86-nat.c \
x86-tdep.c \
xcoffread.c \

231
gdb/amd64-gnu-tdep.c Normal file
View File

@ -0,0 +1,231 @@
/* Target-dependent code for the GNU Hurd.
Copyright (C) 2024 Free Software Foundation, Inc.
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/>. */
#include "defs.h"
#include "extract-store-integer.h"
#include "gdbcore.h"
#include "osabi.h"
#include "solib-svr4.h"
#include "amd64-tdep.h"
#include "glibc-tdep.h"
/* Recognizing signal handler frames. */
/* When the GNU/Hurd libc calls a signal handler, the return address points
inside the trampoline assembly snippet.
If the trampoline function name can not be identified, we resort to reading
memory from the process in order to identify it. */
static const gdb_byte gnu_sigtramp_code[] =
{
/* rpc_wait_trampoline: */
0x48, 0xc7, 0xc0, 0xe7, 0xff, 0xff, 0xff, /* mov $-25,%rax */
0x0f, 0x05, /* syscall */
0x49, 0x89, 0x04, 0x24, /* mov %rax,(%r12) */
0x48, 0x89, 0xdc, /* mov %rbx,%rsp */
/* trampoline: */
0x5f, /* pop %rdi */
0x5e, /* pop %rsi */
0x5a, /* pop %rdx */
0x48, 0x83, 0xc4, 0x08, /* add $0x8,%rsp */
0x41, 0xff, 0xd5, /* call *%r13 */
/* RA HERE */
0x48, 0x8b, 0x7c, 0x24, 0x10, /* mov 0x10(%rsp),%rdi */
0xc3, /* ret */
/* firewall: */
0xf4, /* hlt */
};
#define GNU_SIGTRAMP_LEN (sizeof gnu_sigtramp_code)
#define GNU_SIGTRAMP_TAIL 7 /* length of tail after RA */
/* If THIS_FRAME is a sigtramp routine, return the address of the
start of the routine. Otherwise, return 0. */
static CORE_ADDR
amd64_gnu_sigtramp_start (frame_info_ptr this_frame)
{
CORE_ADDR pc = get_frame_pc (this_frame);
gdb_byte buf[GNU_SIGTRAMP_LEN];
if (!safe_frame_unwind_memory (this_frame,
pc + GNU_SIGTRAMP_TAIL - GNU_SIGTRAMP_LEN,
buf))
return 0;
if (memcmp (buf, gnu_sigtramp_code, GNU_SIGTRAMP_LEN) != 0)
return 0;
return pc;
}
/* Return whether THIS_FRAME corresponds to a Hurd sigtramp routine. */
static int
amd64_gnu_sigtramp_p (const frame_info_ptr &this_frame)
{
CORE_ADDR pc = get_frame_pc (this_frame);
const char *name;
find_pc_partial_function (pc, &name, NULL, NULL);
/* If we have a NAME, we can check for the trampoline function */
if (name != NULL && strcmp (name, "trampoline") == 0)
return 1;
return amd64_gnu_sigtramp_start (this_frame) != 0;
}
/* Offset to sc_i386_thread_state in sigcontext, from <bits/sigcontext.h>. */
#define AMD64_GNU_SIGCONTEXT_THREAD_STATE_OFFSET 32
/* Assuming THIS_FRAME is a Hurd sigtramp routine, return the
address of the associated sigcontext structure. */
static CORE_ADDR
amd64_gnu_sigcontext_addr (const frame_info_ptr &this_frame)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR pc;
CORE_ADDR sp;
gdb_byte buf[8];
get_frame_register (this_frame, AMD64_RSP_REGNUM, buf);
sp = extract_unsigned_integer (buf, 8, byte_order);
pc = amd64_gnu_sigtramp_start (this_frame);
if (pc)
{
CORE_ADDR sigcontext_addr;
/* The sigcontext structure address is passed as the third argument
* of the signal handler but %RDX is not saved across calls. Luckily,
* the structured is saved underneath the &__sigreturn and a dummy word
* to fill the slot for the address for __sigreturn to return to.
*/
read_memory (sp + 16, buf, 8);
sigcontext_addr = extract_unsigned_integer (buf, 8, byte_order);
return sigcontext_addr + AMD64_GNU_SIGCONTEXT_THREAD_STATE_OFFSET;
}
error (_("Couldn't recognize signal trampoline."));
return 0;
}
/* Mapping between the general-purpose registers in `struct
sigcontext' format (starting at sc_i386_thread_state)
and GDB's register cache layout. */
/* From <bits/sigcontext.h>. */
static int amd64_gnu_sc_reg_offset[] =
{
15 * 8, /* %rax */
12 * 8, /* %rbx */
14 * 8, /* %rcx */
13 * 8, /* %rdx */
10 * 8, /* %rsi */
9 * 8, /* %rdi */
10 * 8, /* %rbp */
11 * 8, /* %rsp */
0 * 8, /* %r8 ... */
8 * 8,
7 * 8,
6 * 8,
3 * 8,
2 * 8,
1 * 8,
0 * 8, /* ... %r15 */
16 * 8, /* %rip */
18 * 8, /* %eflags */
17 * 8, /* %cs */
};
/* From <sys/ucontext.h>. */
static int amd64_gnu_gregset_reg_offset[] =
{
10 * 8, /* %rax */
5 * 8, /* %rbx */
11 * 8, /* %rcx */
12 * 8, /* %rdx */
13 * 8, /* %rsi */
14 * 8, /* %rdi */
4 * 8, /* %rbp */
19 * 8, /* %rsp */
9 * 8, /* %r8 ... */
8 * 8,
7 * 8,
6 * 8,
3 * 8,
2 * 8,
1 * 8,
0 * 8, /* ... %r15 */
16 * 8, /* %rip */
18 * 8, /* %eflags */
17 * 8, /* %cs */
-1, /* %ss */
-1, /* %ds */
-1, /* %es */
-1, /* %fs */
-1, /* %gs */
};
static void
amd64_gnu_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (gdbarch);
amd64_init_abi (info, gdbarch,
amd64_target_description (X86_XSTATE_SSE_MASK, true));
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
/* Hurd uses SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
/* Hurd uses the dynamic linker included in the GNU C Library. */
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
tdep->gregset_reg_offset = amd64_gnu_gregset_reg_offset;
tdep->gregset_num_regs = ARRAY_SIZE (amd64_gnu_gregset_reg_offset);
tdep->sizeof_gregset = 21 * 8; /* sizeof (struct i386_thread_state); */
tdep->sigtramp_p = amd64_gnu_sigtramp_p;
tdep->sigcontext_addr = amd64_gnu_sigcontext_addr;
tdep->sc_reg_offset = amd64_gnu_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (amd64_gnu_sc_reg_offset);
/* Hurd uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_lp64_fetch_link_map_offsets);
}
void _initialize_amd64_gnu_tdep ();
void
_initialize_amd64_gnu_tdep ()
{
gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
GDB_OSABI_HURD, amd64_gnu_init_abi);
}

7
gdb/config/i386/nm-i386gnu.h → gdb/config/i386/nm-x86-gnu.h
View File

@ -22,9 +22,16 @@
/* Thread flavors used in re-setting the T bit. */
#define THREAD_STATE_FLAVOR i386_REGS_SEGS_STATE
#define THREAD_STATE_SIZE i386_THREAD_STATE_COUNT
#ifdef __x86_64__
#define THREAD_STATE_SET_TRACED(state) \
((struct i386_thread_state *) (state))->rfl |= 0x100
#define THREAD_STATE_CLEAR_TRACED(state) \
((((struct i386_thread_state *) (state))->rfl &= ~0x100), 1)
#else
#define THREAD_STATE_SET_TRACED(state) \
((struct i386_thread_state *) (state))->efl |= 0x100
#define THREAD_STATE_CLEAR_TRACED(state) \
((((struct i386_thread_state *) (state))->efl &= ~0x100), 1)
#endif /* __x86_64__ */
#endif /* CONFIG_I386_NM_I386GNU_H */

0
gdb/config/i386/i386gnu.mn → gdb/config/i386/x86-gnu.mn
View File

1
gdb/configure.host
View File

@ -183,6 +183,7 @@ x86_64-*-mingw*) gdb_host=mingw64
gdb_host_obs=mingw-hdep.o
;;
x86_64-*-cygwin*) gdb_host=cygwin64 ;;
x86_64-*-gnu*) gdb_host=gnu64 ;;
m32r*-*-linux*) gdb_host=linux ;;
xtensa*-*-linux*) gdb_host=linux ;;

27
gdb/configure.nat
View File

@ -211,23 +211,44 @@ case ${gdb_host} in
;;
esac
;;
gnu64)
case ${gdb_host_cpu} in
i386)
# Host: x86_64 running the GNU Hurd
NATDEPFILES='x86-gnu-nat.o gnu-nat.o \
x86-nat.o nat/x86-dregs.o \
amd64-nat.o fork-child.o \
nat/fork-inferior.o \
notify_S.o process_reply_S.o msg_reply_S.o \
msg_U.o exc_request_U.o exc_request_S.o'
HAVE_NATIVE_GCORE_HOST=1
NAT_FILE='nm-x86-gnu.h'
MH_CFLAGS='-D_GNU_SOURCE'
XM_CLIBS='-lshouldbeinlibc'
nat_makefile_frag="${srcdir}/config/${gdb_host_cpu}/x86-gnu.mn"
;;
esac
;;
i386gnu)
case ${gdb_host_cpu} in
i386)
# Host: Intel 386 running the GNU Hurd
NATDEPFILES='i386-gnu-nat.o gnu-nat.o \
NATDEPFILES='x86-gnu-nat.o gnu-nat.o \
x86-nat.o nat/x86-dregs.o fork-child.o \
nat/fork-inferior.o \
notify_S.o process_reply_S.o msg_reply_S.o \
msg_U.o exc_request_U.o exc_request_S.o'
HAVE_NATIVE_GCORE_HOST=1
NAT_FILE='nm-i386gnu.h'
NAT_FILE='nm-x86-gnu.h'
MH_CFLAGS='-D_GNU_SOURCE'
XM_CLIBS='-lshouldbeinlibc'
nat_makefile_frag="${srcdir}/config/${gdb_host_cpu}/i386gnu.mn"
nat_makefile_frag="${srcdir}/config/${gdb_host_cpu}/x86-gnu.mn"
;;
esac
;;

6
gdb/configure.tgt
View File

@ -327,7 +327,7 @@ i[34567]86-*-linux*)
;;
i[34567]86-*-gnu*)
# Target: Intel 386 running the GNU Hurd
gdb_target_obs="i386-gnu-tdep.o solib-svr4.o"
gdb_target_obs="i386-gnu-tdep.o glibc-tdep.o solib-svr4.o"
;;
i[34567]86-*-cygwin*)
# Target: Intel 386 running win32
@ -734,6 +734,10 @@ x86_64-*-openbsd*)
x86_64-*-rtems*)
gdb_target_obs="${amd64_tobjs} ${i386_tobjs} i386-bsd-tdep.o"
;;
x86_64-*-gnu*)
# Target: x86_64 running the GNU Hurd
gdb_target_obs="amd64-gnu-tdep.o glibc-tdep.o solib-svr4.o"
;;
xtensa*-*-*linux*)
# Target: GNU/Linux Xtensa
gdb_target_obs="xtensa-linux-tdep.o symfile-mem.o linux-tdep.o"

13
gdb/i386-gnu-tdep.c
View File

@ -21,6 +21,7 @@
#include "osabi.h"
#include "solib-svr4.h"
#include "glibc-tdep.h"
#include "i386-tdep.h"
/* Recognizing signal handler frames. */
@ -72,8 +73,7 @@ i386_gnu_sigtramp_start (const frame_info_ptr &this_frame)
return pc;
}
/* Return whether THIS_FRAME corresponds to a GNU/Linux sigtramp
routine. */
/* Return whether THIS_FRAME corresponds to a Hurd sigtramp routine. */
static int
i386_gnu_sigtramp_p (const frame_info_ptr &this_frame)
@ -178,9 +178,18 @@ i386gnu_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU uses ELF. */
i386_elf_init_abi (info, gdbarch);
/* Hurd uses SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
/* Hurd uses the dynamic linker included in the GNU C Library. */
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
tdep->gregset_reg_offset = i386gnu_gregset_reg_offset;
tdep->gregset_num_regs = ARRAY_SIZE (i386gnu_gregset_reg_offset);
tdep->sizeof_gregset = 19 * 4;

171
gdb/i386-gnu-nat.c → gdb/x86-gnu-nat.c
View File

@ -34,7 +34,13 @@ extern "C"
#include "floatformat.h"
#include "regcache.h"
#ifdef __x86_64__
#include "amd64-tdep.h"
#include "amd64-nat.h"
#else
#include "i386-tdep.h"
#endif
#include "inf-child.h"
#include "i387-tdep.h"
@ -42,21 +48,82 @@ extern "C"
/* Offset to the thread_state_t location where REG is stored. */
#define REG_OFFSET(reg) offsetof (struct i386_thread_state, reg)
#ifdef __x86_64__
/* At REG_OFFSET[N] is the offset to the thread_state_t location where
the GDB register N is stored. */
static int reg_offset[] =
static int amd64_gnu_thread_state_reg_offset[] =
{
REG_OFFSET (eax), REG_OFFSET (ecx), REG_OFFSET (edx), REG_OFFSET (ebx),
REG_OFFSET (uesp), REG_OFFSET (ebp), REG_OFFSET (esi), REG_OFFSET (edi),
REG_OFFSET (eip), REG_OFFSET (efl), REG_OFFSET (cs), REG_OFFSET (ss),
REG_OFFSET (ds), REG_OFFSET (es), REG_OFFSET (fs), REG_OFFSET (gs)
REG_OFFSET (rax), /* %rax */
REG_OFFSET (rbx), /* %rbx */
REG_OFFSET (rcx), /* %rcx */
REG_OFFSET (rdx), /* %rdx */
REG_OFFSET (rsi), /* %rsi */
REG_OFFSET (rdi), /* %rdi */
REG_OFFSET (rbp), /* %rbp */
REG_OFFSET (ursp), /* %rsp */
REG_OFFSET (r8), /* %r8 ... */
REG_OFFSET (r9),
REG_OFFSET (r10),
REG_OFFSET (r11),
REG_OFFSET (r12),
REG_OFFSET (r13),
REG_OFFSET (r14),
REG_OFFSET (r15), /* ... %r15 */
REG_OFFSET (rip), /* %rip */
REG_OFFSET (rfl), /* %rflags */
REG_OFFSET (cs) /* %cs */
};
#define REG_ADDR(state, regnum) ((char *)(state) + reg_offset[regnum])
static const int amd64_gnu_thread_state_num_regs =
ARRAY_SIZE (amd64_gnu_thread_state_reg_offset);
#define REG_ADDR(state, regnum) \
((char *)(state) + amd64_gnu_thread_state_reg_offset[regnum])
#define VALID_REGISTER(regnum) \
((regnum) >= 0 && (regnum) < amd64_gnu_thread_state_num_regs)
#define NUM_GREGS amd64_gnu_thread_state_num_regs
#define FLAGS_REGISTER rfl
#else
/* At REG_OFFSET[N] is the offset to the thread_state_t location where
the GDB register N is stored. */
static int i386_gnu_thread_state_reg_offset[] =
{
REG_OFFSET (eax), /* %eax */
REG_OFFSET (ecx), /* %ecx */
REG_OFFSET (edx), /* %edx */
REG_OFFSET (ebx), /* %ebx */
REG_OFFSET (uesp), /* %esp */
REG_OFFSET (ebp), /* %ebp */
REG_OFFSET (esi), /* %esi */
REG_OFFSET (edi), /* %edi */
REG_OFFSET (eip), /* %eip */
REG_OFFSET (efl), /* %efl */
REG_OFFSET (cs), /* %cs */
REG_OFFSET (ss), /* %ss */
REG_OFFSET (ds), /* %ds */
REG_OFFSET (es), /* %es */
REG_OFFSET (fs), /* %fs */
REG_OFFSET (gs) /* gs */
};
static const int i386_gnu_thread_state_num_regs =
ARRAY_SIZE (i386_gnu_thread_state_reg_offset);
#define REG_ADDR(state, regnum) \
((char *)(state) + i386_gnu_thread_state_reg_offset[regnum])
#define VALID_REGISTER(regnum) \
((regnum) >= 0 && (regnum) < i386_gnu_thread_state_num_regs)
#define NUM_GREGS i386_gnu_thread_state_num_regs
#define FLAGS_REGISTER efl
#endif /* __x86_64__ */
/* The i386 GNU Hurd target. */
/* The x86 GNU Hurd target. */
#ifdef i386_DEBUG_STATE
using gnu_base_target = x86_nat_target<gnu_nat_target>;
@ -64,13 +131,13 @@ using gnu_base_target = x86_nat_target<gnu_nat_target>;
using gnu_base_target = gnu_nat_target;
#endif
struct i386_gnu_nat_target final : public gnu_base_target
struct x86_gnu_nat_target final : public gnu_base_target
{
void fetch_registers (struct regcache *, int) override;
void store_registers (struct regcache *, int) override;
};
static i386_gnu_nat_target the_i386_gnu_nat_target;
static x86_gnu_nat_target the_x86_gnu_nat_target;
/* Get the whole floating-point state of THREAD and record the values
of the corresponding (pseudo) registers. */
@ -105,7 +172,7 @@ fetch_fpregs (struct regcache *regcache, struct proc *thread)
/* Fetch register REGNO, or all regs if REGNO is -1. */
void
i386_gnu_nat_target::fetch_registers (struct regcache *regcache, int regno)
x86_gnu_nat_target::fetch_registers (struct regcache *regcache, int regno)
{
struct proc *thread;
ptid_t ptid = regcache->ptid ();
@ -118,7 +185,7 @@ i386_gnu_nat_target::fetch_registers (struct regcache *regcache, int regno)
error (_("Can't fetch registers from thread %s: No such thread"),
target_pid_to_str (ptid).c_str ());
if (regno < I386_NUM_GREGS || regno == -1)
if (VALID_REGISTER (regno) || regno == -1)
{
thread_state_t state;
@ -137,7 +204,7 @@ i386_gnu_nat_target::fetch_registers (struct regcache *regcache, int regno)
proc_debug (thread, "fetching all register");
for (i = 0; i < I386_NUM_GREGS; i++)
for (i = 0; i < NUM_GREGS; i++)
regcache->raw_supply (i, REG_ADDR (state, i));
thread->fetched_regs = ~0;
}
@ -152,7 +219,7 @@ i386_gnu_nat_target::fetch_registers (struct regcache *regcache, int regno)
}
}
if (regno >= I386_NUM_GREGS || regno == -1)
if (!VALID_REGISTER(regno) || regno == -1)
{
proc_debug (thread, "fetching floating-point registers");
@ -195,7 +262,7 @@ store_fpregs (const struct regcache *regcache, struct proc *thread, int regno)
/* Store at least register REGNO, or all regs if REGNO == -1. */
void
i386_gnu_nat_target::store_registers (struct regcache *regcache, int regno)
x86_gnu_nat_target::store_registers (struct regcache *regcache, int regno)
{
struct proc *thread;
struct gdbarch *gdbarch = regcache->arch ();
@ -209,7 +276,7 @@ i386_gnu_nat_target::store_registers (struct regcache *regcache, int regno)
error (_("Couldn't store registers into thread %s: No such thread"),
target_pid_to_str (ptid).c_str ());
if (regno < I386_NUM_GREGS || regno == -1)
if (VALID_REGISTER (regno) || regno == -1)
{
thread_state_t state;
thread_state_data_t old_state;
@ -230,14 +297,14 @@ i386_gnu_nat_target::store_registers (struct regcache *regcache, int regno)
/* Save the T bit. We might try to restore the %eflags register
below, but changing the T bit would seriously confuse GDB. */
trace = ((struct i386_thread_state *)state)->efl & 0x100;
trace = ((struct i386_thread_state *)state)->FLAGS_REGISTER & 0x100;
if (!was_aborted && was_valid)
/* See which registers have changed after aborting the thread. */
{
int check_regno;
for (check_regno = 0; check_regno < I386_NUM_GREGS; check_regno++)
for (check_regno = 0; check_regno < NUM_GREGS; check_regno++)
if ((thread->fetched_regs & (1 << check_regno))
&& memcpy (REG_ADDR (&old_state, check_regno),
REG_ADDR (state, check_regno),
@ -262,7 +329,7 @@ i386_gnu_nat_target::store_registers (struct regcache *regcache, int regno)
proc_debug (thread, "storing all registers");
for (i = 0; i < I386_NUM_GREGS; i++)
for (i = 0; i < NUM_GREGS; i++)
if (REG_VALID == regcache->get_register_status (i))
regcache->raw_collect (i, REG_ADDR (state, i));
}
@ -276,11 +343,11 @@ i386_gnu_nat_target::store_registers (struct regcache *regcache, int regno)
}
/* Restore the T bit. */
((struct i386_thread_state *)state)->efl &= ~0x100;
((struct i386_thread_state *)state)->efl |= trace;
((struct i386_thread_state *)state)->FLAGS_REGISTER &= ~0x100;
((struct i386_thread_state *)state)->FLAGS_REGISTER |= trace;
}
if (regno >= I386_NUM_GREGS || regno == -1)
if (!VALID_REGISTER (regno) || regno == -1)
{
proc_debug (thread, "storing floating-point registers");
@ -295,7 +362,7 @@ i386_gnu_nat_target::store_registers (struct regcache *regcache, int regno)
/* Get debug registers for thread THREAD. */
static void
i386_gnu_dr_get (struct i386_debug_state *regs, struct proc *thread)
x86_gnu_dr_get (struct i386_debug_state *regs, struct proc *thread)
{
mach_msg_type_number_t count = i386_DEBUG_STATE_COUNT;
kern_return_t err;
@ -310,7 +377,7 @@ i386_gnu_dr_get (struct i386_debug_state *regs, struct proc *thread)
/* Set debug registers for thread THREAD. */
static void
i386_gnu_dr_set (const struct i386_debug_state *regs, struct proc *thread)
x86_gnu_dr_set (const struct i386_debug_state *regs, struct proc *thread)
{
kern_return_t err;
@ -324,23 +391,23 @@ i386_gnu_dr_set (const struct i386_debug_state *regs, struct proc *thread)
/* Set DR_CONTROL in THREAD. */
static void
i386_gnu_dr_set_control_one (struct proc *thread, void *arg)
x86_gnu_dr_set_control_one (struct proc *thread, void *arg)
{
unsigned long *control = (unsigned long *) arg;
struct i386_debug_state regs;
i386_gnu_dr_get (&regs, thread);
x86_gnu_dr_get (&regs, thread);
regs.dr[DR_CONTROL] = *control;
i386_gnu_dr_set (&regs, thread);
x86_gnu_dr_set (&regs, thread);
}
/* Set DR_CONTROL to CONTROL in all threads. */
static void
i386_gnu_dr_set_control (unsigned long control)
x86_gnu_dr_set_control (unsigned long control)
{
inf_update_procs (gnu_current_inf);
inf_threads (gnu_current_inf, i386_gnu_dr_set_control_one, &control);
inf_threads (gnu_current_inf, x86_gnu_dr_set_control_one, &control);
}
/* Parameters to set a debugging address. */
@ -354,20 +421,20 @@ struct reg_addr
/* Set address REGNUM (zero based) to ADDR in THREAD. */
static void
i386_gnu_dr_set_addr_one (struct proc *thread, void *arg)
x86_gnu_dr_set_addr_one (struct proc *thread, void *arg)
{
struct reg_addr *reg_addr = (struct reg_addr *) arg;
struct i386_debug_state regs;
i386_gnu_dr_get (&regs, thread);
x86_gnu_dr_get (&regs, thread);
regs.dr[reg_addr->regnum] = reg_addr->addr;
i386_gnu_dr_set (&regs, thread);
x86_gnu_dr_set (&regs, thread);
}
/* Set address REGNUM (zero based) to ADDR in all threads. */
static void
i386_gnu_dr_set_addr (int regnum, CORE_ADDR addr)
x86_gnu_dr_set_addr (int regnum, CORE_ADDR addr)
{
struct reg_addr reg_addr;
@ -377,13 +444,13 @@ i386_gnu_dr_set_addr (int regnum, CORE_ADDR addr)
reg_addr.addr = addr;
inf_update_procs (gnu_current_inf);
inf_threads (gnu_current_inf, i386_gnu_dr_set_addr_one, &reg_addr);
inf_threads (gnu_current_inf, x86_gnu_dr_set_addr_one, &reg_addr);
}
/* Get debug register REGNUM value from only the one LWP of PTID. */
static unsigned long
i386_gnu_dr_get_reg (ptid_t ptid, int regnum)
x86_gnu_dr_get_reg (ptid_t ptid, int regnum)
{
struct i386_debug_state regs;
struct proc *thread;
@ -392,7 +459,7 @@ i386_gnu_dr_get_reg (ptid_t ptid, int regnum)
inf_update_procs (gnu_current_inf);
thread = inf_tid_to_thread (gnu_current_inf, ptid.lwp ());
i386_gnu_dr_get (&regs, thread);
x86_gnu_dr_get (&regs, thread);
return regs.dr[regnum];
}
@ -400,46 +467,50 @@ i386_gnu_dr_get_reg (ptid_t ptid, int regnum)
/* Return the inferior's debug register REGNUM. */
static CORE_ADDR
i386_gnu_dr_get_addr (int regnum)
x86_gnu_dr_get_addr (int regnum)
{
gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
return i386_gnu_dr_get_reg (inferior_ptid, regnum);
return x86_gnu_dr_get_reg (inferior_ptid, regnum);
}
/* Get DR_STATUS from only the one thread of INFERIOR_PTID. */
static unsigned long
i386_gnu_dr_get_status (void)
x86_gnu_dr_get_status (void)
{
return i386_gnu_dr_get_reg (inferior_ptid, DR_STATUS);
return x86_gnu_dr_get_reg (inferior_ptid, DR_STATUS);
}
/* Return the inferior's DR7 debug control register. */
static unsigned long
i386_gnu_dr_get_control (void)
x86_gnu_dr_get_control (void)
{
return i386_gnu_dr_get_reg (inferior_ptid, DR_CONTROL);
return x86_gnu_dr_get_reg (inferior_ptid, DR_CONTROL);
}
#endif /* i386_DEBUG_STATE */
void _initialize_i386gnu_nat ();
void _initialize_x86_gnu_nat ();
void
_initialize_i386gnu_nat ()
_initialize_x86_gnu_nat ()
{
#ifdef i386_DEBUG_STATE
x86_dr_low.set_control = i386_gnu_dr_set_control;
x86_dr_low.set_control = x86_gnu_dr_set_control;
gdb_assert (DR_FIRSTADDR == 0 && DR_LASTADDR < i386_DEBUG_STATE_COUNT);
x86_dr_low.set_addr = i386_gnu_dr_set_addr;
x86_dr_low.get_addr = i386_gnu_dr_get_addr;
x86_dr_low.get_status = i386_gnu_dr_get_status;
x86_dr_low.get_control = i386_gnu_dr_get_control;
x86_dr_low.set_addr = x86_gnu_dr_set_addr;
x86_dr_low.get_addr = x86_gnu_dr_get_addr;
x86_dr_low.get_status = x86_gnu_dr_get_status;
x86_dr_low.get_control = x86_gnu_dr_get_control;
#ifdef __x86_64__
x86_set_debug_register_length (8);
#else
x86_set_debug_register_length (4);
#endif
#endif /* i386_DEBUG_STATE */
gnu_target = &the_i386_gnu_nat_target;
gnu_target = &the_x86_gnu_nat_target;
/* Register the target. */
add_inf_child_target (&the_i386_gnu_nat_target);
add_inf_child_target (&the_x86_gnu_nat_target);
}