011a70c2ea
* linux-x86-64-low.c (x86_64_breakpoint, x86_64_breakpoint_len) (x86_64_get_pc, x86_64_set_pc, x86_64_breakpoint_at): New. (the_low_target): Update.
181 lines
4.2 KiB
C
181 lines
4.2 KiB
C
/* GNU/Linux/x86-64 specific low level interface, for the remote server
|
|
for GDB.
|
|
Copyright 2002, 2004, 2005
|
|
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 2 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, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include "server.h"
|
|
#include "linux-low.h"
|
|
#include "i387-fp.h"
|
|
|
|
/* Correct for all GNU/Linux targets (for quite some time). */
|
|
#define GDB_GREGSET_T elf_gregset_t
|
|
#define GDB_FPREGSET_T elf_fpregset_t
|
|
|
|
#ifndef HAVE_ELF_FPREGSET_T
|
|
/* Make sure we have said types. Not all platforms bring in <linux/elf.h>
|
|
via <sys/procfs.h>. */
|
|
#ifdef HAVE_LINUX_ELF_H
|
|
#include <linux/elf.h>
|
|
#endif
|
|
#endif
|
|
|
|
#include "../gdb_proc_service.h"
|
|
|
|
#include <sys/reg.h>
|
|
#include <sys/procfs.h>
|
|
#include <sys/ptrace.h>
|
|
|
|
/* This definition comes from prctl.h, but some kernels may not have it. */
|
|
#ifndef PTRACE_ARCH_PRCTL
|
|
#define PTRACE_ARCH_PRCTL 30
|
|
#endif
|
|
|
|
/* The following definitions come from prctl.h, but may be absent
|
|
for certain configurations. */
|
|
#ifndef ARCH_GET_FS
|
|
#define ARCH_SET_GS 0x1001
|
|
#define ARCH_SET_FS 0x1002
|
|
#define ARCH_GET_FS 0x1003
|
|
#define ARCH_GET_GS 0x1004
|
|
#endif
|
|
|
|
static int x86_64_regmap[] = {
|
|
RAX * 8, RBX * 8, RCX * 8, RDX * 8,
|
|
RSI * 8, RDI * 8, RBP * 8, RSP * 8,
|
|
R8 * 8, R9 * 8, R10 * 8, R11 * 8,
|
|
R12 * 8, R13 * 8, R14 * 8, R15 * 8,
|
|
RIP * 8, EFLAGS * 8, CS * 8, SS * 8,
|
|
DS * 8, ES * 8, FS * 8, GS * 8
|
|
};
|
|
|
|
#define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int))
|
|
|
|
/* Called by libthread_db. */
|
|
|
|
ps_err_e
|
|
ps_get_thread_area (const struct ps_prochandle *ph,
|
|
lwpid_t lwpid, int idx, void **base)
|
|
{
|
|
switch (idx)
|
|
{
|
|
case FS:
|
|
if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0)
|
|
return PS_OK;
|
|
break;
|
|
case GS:
|
|
if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0)
|
|
return PS_OK;
|
|
break;
|
|
default:
|
|
return PS_BADADDR;
|
|
}
|
|
return PS_ERR;
|
|
}
|
|
|
|
static void
|
|
x86_64_fill_gregset (void *buf)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < X86_64_NUM_GREGS; i++)
|
|
collect_register (i, ((char *) buf) + x86_64_regmap[i]);
|
|
}
|
|
|
|
static void
|
|
x86_64_store_gregset (const void *buf)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < X86_64_NUM_GREGS; i++)
|
|
supply_register (i, ((char *) buf) + x86_64_regmap[i]);
|
|
}
|
|
|
|
static void
|
|
x86_64_fill_fpregset (void *buf)
|
|
{
|
|
i387_cache_to_fxsave (buf);
|
|
}
|
|
|
|
static void
|
|
x86_64_store_fpregset (const void *buf)
|
|
{
|
|
i387_fxsave_to_cache (buf);
|
|
}
|
|
|
|
struct regset_info target_regsets[] = {
|
|
{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
|
|
GENERAL_REGS,
|
|
x86_64_fill_gregset, x86_64_store_gregset },
|
|
{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
|
|
FP_REGS,
|
|
x86_64_fill_fpregset, x86_64_store_fpregset },
|
|
{ 0, 0, -1, -1, NULL, NULL }
|
|
};
|
|
|
|
static const unsigned char x86_64_breakpoint[] = { 0xCC };
|
|
#define x86_64_breakpoint_len 1
|
|
|
|
extern int debug_threads;
|
|
|
|
static CORE_ADDR
|
|
x86_64_get_pc ()
|
|
{
|
|
unsigned long pc;
|
|
|
|
collect_register_by_name ("rip", &pc);
|
|
|
|
if (debug_threads)
|
|
fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc);
|
|
return pc;
|
|
}
|
|
|
|
static void
|
|
x86_64_set_pc (CORE_ADDR newpc)
|
|
{
|
|
if (debug_threads)
|
|
fprintf (stderr, "set pc to %08lx\n", (long) newpc);
|
|
supply_register_by_name ("rip", &newpc);
|
|
}
|
|
|
|
static int
|
|
x86_64_breakpoint_at (CORE_ADDR pc)
|
|
{
|
|
unsigned char c;
|
|
|
|
read_inferior_memory (pc, &c, 1);
|
|
if (c == 0xCC)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct linux_target_ops the_low_target = {
|
|
-1,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
x86_64_get_pc,
|
|
x86_64_set_pc,
|
|
x86_64_breakpoint,
|
|
x86_64_breakpoint_len,
|
|
NULL,
|
|
1,
|
|
x86_64_breakpoint_at,
|
|
};
|