binutils-gdb/gdb/gdbserver/linux-x86-64-low.c
Daniel Jacobowitz 23181151a2 XML feature description support.
* NEWS: Mention target descriptions, "set tdesc filename",
	"unset tdesc filename", "show tdesc filename", and
	qXfer:features:read.
	* arch-utils.c (choose_architecture_for_target): New function.
	(gdbarch_info_fill): Call it.
	* target-descriptions.c (struct property): Make members non-const.
	(struct target_desc): Add arch member.
	(target_description_filename): New variable.
	(target_find_description): Try via XML first.
	(tdesc_architecture): New.
	(free_target_description, make_cleanup_free_target_description): New.
	(set_tdesc_property): Call xstrdup.
	(set_tdesc_architecture, tdesc_set_cmdlist, tdesc_show_cmdlist)
	(tdesc_unset_cmdlist, unset_tdesc_cmd, unset_tdesc_filename_cmd)
	(set_tdesc_cmd, show_tdesc_cmd, set_tdesc_filename_cmd)
	(show_tdesc_filename_cmd, _initialize_target_descriptions): New.
	* target-descriptions.h (tdesc_architecture)
	(make_cleanup_free_target_description, set_tdesc_architecture): New
	prototypes.
	* Makefile.in (SFILES): Add xml-tdesc.c.
	(COMMON_OBS): Add xml-tdesc.o.
	(target-descriptions.o): Update.
	(xml-tdesc.o): New rule.
	* xml-tdesc.c, xml-tdesc.h: New files.
	* remote.c (PACKET_qXfer_features): New enum.
	(remote_protocol_features): Add qXfer:features:read.
	(remote_xfer_partial): Handle TARGET_OBJECT_AVAILABLE_FEATURES.
	(_initialize_remote): Register qXfer:features:read.
	* target.h (enum target_object): Add TARGET_OBJECT_AVAILABLE_FEATURES.
	* features/gdb-target.dtd: New file.

	* linux-i386-low.c (the_low_target): Set arch_string.
	* linux-x86-64-low.c (the_low_target): Likewise.
	* linux-low.c (linux_arch_string): New.
	(linux_target_ops): Add it.
	* linux-low.h (struct linux_target_ops): Add arch_string.
	* server.c (write_qxfer_response): Use const void * for DATA.
	(get_features_xml): New.
	(handle_query): Handle qXfer:features:read.  Report it for qSupported.
	* target.h (struct target_ops): Add arch_string method.

	* gdb.texinfo (Target Descriptions): New section.
	(General Query Packets): Add QPassSignals anchor.  Mention
	qXfer:features:read under qSupported.  Expand mentions of
	qXfer:memory-map:read and QPassSignals.  Document
	qXfer:features:read.
2007-01-09 22:55:10 +00:00

182 lines
4.1 KiB
C

/* GNU/Linux/x86-64 specific low level interface, for the remote server
for GDB.
Copyright (C) 2002, 2004, 2005, 2006, 2007 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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "server.h"
#include "linux-low.h"
#include "i387-fp.h"
#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,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1,
ORIG_RAX * 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++)
if (x86_64_regmap[i] != -1)
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++)
if (x86_64_regmap[i] != -1)
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,
NULL,
NULL,
NULL,
NULL,
0,
"i386:x86-64",
};