/* GNU/Linux/i386 specific low level interface, for the remote server for GDB.
|
/* GNU/Linux/i386 specific low level interface, for the remote server for GDB.
|
Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006,
|
Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006,
|
2007, 2008 Free Software Foundation, Inc.
|
2007, 2008 Free Software Foundation, Inc.
|
|
|
This file is part of GDB.
|
This file is part of GDB.
|
|
|
This program is free software; you can redistribute it and/or modify
|
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
|
it under the terms of the GNU General Public License as published by
|
the Free Software Foundation; either version 3 of the License, or
|
the Free Software Foundation; either version 3 of the License, or
|
(at your option) any later version.
|
(at your option) any later version.
|
|
|
This program is distributed in the hope that it will be useful,
|
This program is distributed in the hope that it will be useful,
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
GNU General Public License for more details.
|
GNU General Public License for more details.
|
|
|
You should have received a copy of the GNU General Public License
|
You should have received a copy of the GNU General Public License
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
#include "server.h"
|
#include "server.h"
|
#include "linux-low.h"
|
#include "linux-low.h"
|
#include "i387-fp.h"
|
#include "i387-fp.h"
|
|
|
#include "gdb_proc_service.h"
|
#include "gdb_proc_service.h"
|
|
|
#include <sys/ptrace.h>
|
#include <sys/ptrace.h>
|
|
|
#ifdef HAVE_SYS_REG_H
|
#ifdef HAVE_SYS_REG_H
|
#include <sys/reg.h>
|
#include <sys/reg.h>
|
#endif
|
#endif
|
|
|
#ifndef PTRACE_GET_THREAD_AREA
|
#ifndef PTRACE_GET_THREAD_AREA
|
#define PTRACE_GET_THREAD_AREA 25
|
#define PTRACE_GET_THREAD_AREA 25
|
#endif
|
#endif
|
|
|
/* This module only supports access to the general purpose registers. */
|
/* This module only supports access to the general purpose registers. */
|
|
|
#define i386_num_regs 16
|
#define i386_num_regs 16
|
|
|
/* This stuff comes from i386-linux-nat.c. */
|
/* This stuff comes from i386-linux-nat.c. */
|
|
|
/* Mapping between the general-purpose registers in `struct user'
|
/* Mapping between the general-purpose registers in `struct user'
|
format and GDB's register array layout. */
|
format and GDB's register array layout. */
|
static int i386_regmap[] =
|
static int i386_regmap[] =
|
{
|
{
|
EAX * 4, ECX * 4, EDX * 4, EBX * 4,
|
EAX * 4, ECX * 4, EDX * 4, EBX * 4,
|
UESP * 4, EBP * 4, ESI * 4, EDI * 4,
|
UESP * 4, EBP * 4, ESI * 4, EDI * 4,
|
EIP * 4, EFL * 4, CS * 4, SS * 4,
|
EIP * 4, EFL * 4, CS * 4, SS * 4,
|
DS * 4, ES * 4, FS * 4, GS * 4
|
DS * 4, ES * 4, FS * 4, GS * 4
|
};
|
};
|
|
|
/* Called by libthread_db. */
|
/* Called by libthread_db. */
|
|
|
ps_err_e
|
ps_err_e
|
ps_get_thread_area (const struct ps_prochandle *ph,
|
ps_get_thread_area (const struct ps_prochandle *ph,
|
lwpid_t lwpid, int idx, void **base)
|
lwpid_t lwpid, int idx, void **base)
|
{
|
{
|
unsigned int desc[4];
|
unsigned int desc[4];
|
|
|
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid,
|
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid,
|
(void *) idx, (unsigned long) &desc) < 0)
|
(void *) idx, (unsigned long) &desc) < 0)
|
return PS_ERR;
|
return PS_ERR;
|
|
|
*(int *)base = desc[1];
|
*(int *)base = desc[1];
|
return PS_OK;
|
return PS_OK;
|
}
|
}
|
|
|
static int
|
static int
|
i386_cannot_store_register (int regno)
|
i386_cannot_store_register (int regno)
|
{
|
{
|
return (regno >= i386_num_regs);
|
return (regno >= i386_num_regs);
|
}
|
}
|
|
|
static int
|
static int
|
i386_cannot_fetch_register (int regno)
|
i386_cannot_fetch_register (int regno)
|
{
|
{
|
return (regno >= i386_num_regs);
|
return (regno >= i386_num_regs);
|
}
|
}
|
|
|
|
|
#ifdef HAVE_PTRACE_GETREGS
|
#ifdef HAVE_PTRACE_GETREGS
|
#include <sys/procfs.h>
|
#include <sys/procfs.h>
|
#include <sys/ptrace.h>
|
#include <sys/ptrace.h>
|
|
|
static void
|
static void
|
i386_fill_gregset (void *buf)
|
i386_fill_gregset (void *buf)
|
{
|
{
|
int i;
|
int i;
|
|
|
for (i = 0; i < i386_num_regs; i++)
|
for (i = 0; i < i386_num_regs; i++)
|
collect_register (i, ((char *) buf) + i386_regmap[i]);
|
collect_register (i, ((char *) buf) + i386_regmap[i]);
|
|
|
collect_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
|
collect_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
|
}
|
}
|
|
|
static void
|
static void
|
i386_store_gregset (const void *buf)
|
i386_store_gregset (const void *buf)
|
{
|
{
|
int i;
|
int i;
|
|
|
for (i = 0; i < i386_num_regs; i++)
|
for (i = 0; i < i386_num_regs; i++)
|
supply_register (i, ((char *) buf) + i386_regmap[i]);
|
supply_register (i, ((char *) buf) + i386_regmap[i]);
|
|
|
supply_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
|
supply_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
|
}
|
}
|
|
|
static void
|
static void
|
i386_fill_fpregset (void *buf)
|
i386_fill_fpregset (void *buf)
|
{
|
{
|
i387_cache_to_fsave (buf);
|
i387_cache_to_fsave (buf);
|
}
|
}
|
|
|
static void
|
static void
|
i386_store_fpregset (const void *buf)
|
i386_store_fpregset (const void *buf)
|
{
|
{
|
i387_fsave_to_cache (buf);
|
i387_fsave_to_cache (buf);
|
}
|
}
|
|
|
static void
|
static void
|
i386_fill_fpxregset (void *buf)
|
i386_fill_fpxregset (void *buf)
|
{
|
{
|
i387_cache_to_fxsave (buf);
|
i387_cache_to_fxsave (buf);
|
}
|
}
|
|
|
static void
|
static void
|
i386_store_fpxregset (const void *buf)
|
i386_store_fpxregset (const void *buf)
|
{
|
{
|
i387_fxsave_to_cache (buf);
|
i387_fxsave_to_cache (buf);
|
}
|
}
|
|
|
#endif /* HAVE_PTRACE_GETREGS */
|
#endif /* HAVE_PTRACE_GETREGS */
|
|
|
struct regset_info target_regsets[] = {
|
struct regset_info target_regsets[] = {
|
#ifdef HAVE_PTRACE_GETREGS
|
#ifdef HAVE_PTRACE_GETREGS
|
{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
|
{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
|
GENERAL_REGS,
|
GENERAL_REGS,
|
i386_fill_gregset, i386_store_gregset },
|
i386_fill_gregset, i386_store_gregset },
|
# ifdef HAVE_PTRACE_GETFPXREGS
|
# ifdef HAVE_PTRACE_GETFPXREGS
|
{ PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, sizeof (elf_fpxregset_t),
|
{ PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, sizeof (elf_fpxregset_t),
|
EXTENDED_REGS,
|
EXTENDED_REGS,
|
i386_fill_fpxregset, i386_store_fpxregset },
|
i386_fill_fpxregset, i386_store_fpxregset },
|
# endif
|
# endif
|
{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
|
{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
|
FP_REGS,
|
FP_REGS,
|
i386_fill_fpregset, i386_store_fpregset },
|
i386_fill_fpregset, i386_store_fpregset },
|
#endif /* HAVE_PTRACE_GETREGS */
|
#endif /* HAVE_PTRACE_GETREGS */
|
{ 0, 0, -1, -1, NULL, NULL }
|
{ 0, 0, -1, -1, NULL, NULL }
|
};
|
};
|
|
|
static const unsigned char i386_breakpoint[] = { 0xCC };
|
static const unsigned char i386_breakpoint[] = { 0xCC };
|
#define i386_breakpoint_len 1
|
#define i386_breakpoint_len 1
|
|
|
extern int debug_threads;
|
extern int debug_threads;
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
i386_get_pc ()
|
i386_get_pc ()
|
{
|
{
|
unsigned long pc;
|
unsigned long pc;
|
|
|
collect_register_by_name ("eip", &pc);
|
collect_register_by_name ("eip", &pc);
|
|
|
if (debug_threads)
|
if (debug_threads)
|
fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc);
|
fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc);
|
return pc;
|
return pc;
|
}
|
}
|
|
|
static void
|
static void
|
i386_set_pc (CORE_ADDR newpc)
|
i386_set_pc (CORE_ADDR newpc)
|
{
|
{
|
if (debug_threads)
|
if (debug_threads)
|
fprintf (stderr, "set pc to %08lx\n", (long) newpc);
|
fprintf (stderr, "set pc to %08lx\n", (long) newpc);
|
supply_register_by_name ("eip", &newpc);
|
supply_register_by_name ("eip", &newpc);
|
}
|
}
|
|
|
static int
|
static int
|
i386_breakpoint_at (CORE_ADDR pc)
|
i386_breakpoint_at (CORE_ADDR pc)
|
{
|
{
|
unsigned char c;
|
unsigned char c;
|
|
|
read_inferior_memory (pc, &c, 1);
|
read_inferior_memory (pc, &c, 1);
|
if (c == 0xCC)
|
if (c == 0xCC)
|
return 1;
|
return 1;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
struct linux_target_ops the_low_target = {
|
struct linux_target_ops the_low_target = {
|
i386_num_regs,
|
i386_num_regs,
|
i386_regmap,
|
i386_regmap,
|
i386_cannot_fetch_register,
|
i386_cannot_fetch_register,
|
i386_cannot_store_register,
|
i386_cannot_store_register,
|
i386_get_pc,
|
i386_get_pc,
|
i386_set_pc,
|
i386_set_pc,
|
i386_breakpoint,
|
i386_breakpoint,
|
i386_breakpoint_len,
|
i386_breakpoint_len,
|
NULL,
|
NULL,
|
1,
|
1,
|
i386_breakpoint_at,
|
i386_breakpoint_at,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
0,
|
0,
|
"i386"
|
"i386"
|
};
|
};
|
|
|
