/* GNU/Linux/i386 specific low level interface, for the remote server for GDB.
- Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
+ Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006,
+ 2007, 2008 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
+ 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,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "linux-low.h"
#include "i387-fp.h"
+#include "gdb_proc_service.h"
+
+#include <sys/ptrace.h>
+
#ifdef HAVE_SYS_REG_H
#include <sys/reg.h>
#endif
+#ifndef PTRACE_GET_THREAD_AREA
+#define PTRACE_GET_THREAD_AREA 25
+#endif
+
+/* Defined in auto-generated file reg-i386-linux.c. */
+void init_registers_i386_linux (void);
+
+
/* This module only supports access to the general purpose registers. */
-int num_regs = 16;
+#define i386_num_regs 16
/* This stuff comes from i386-linux-nat.c. */
/* Mapping between the general-purpose registers in `struct user'
format and GDB's register array layout. */
-int regmap[] =
+static int i386_regmap[] =
{
EAX * 4, ECX * 4, EDX * 4, EBX * 4,
UESP * 4, EBP * 4, ESI * 4, EDI * 4,
DS * 4, ES * 4, FS * 4, GS * 4
};
-int
-cannot_store_register (int regno)
+/* Called by libthread_db. */
+
+ps_err_e
+ps_get_thread_area (const struct ps_prochandle *ph,
+ lwpid_t lwpid, int idx, void **base)
{
- return (regno >= num_regs);
+ unsigned int desc[4];
+
+ if (ptrace (PTRACE_GET_THREAD_AREA, lwpid,
+ (void *) idx, (unsigned long) &desc) < 0)
+ return PS_ERR;
+
+ *(int *)base = desc[1];
+ return PS_OK;
}
-int
-cannot_fetch_register (int regno)
+static int
+i386_cannot_store_register (int regno)
{
- return (regno >= num_regs);
+ return (regno >= i386_num_regs);
}
+static int
+i386_cannot_fetch_register (int regno)
+{
+ return (regno >= i386_num_regs);
+}
-#ifdef HAVE_LINUX_REGSETS
+
+#ifdef HAVE_PTRACE_GETREGS
#include <sys/procfs.h>
#include <sys/ptrace.h>
{
int i;
- for (i = 0; i < num_regs; i++)
- collect_register (i, ((char *) buf) + regmap[i]);
+ for (i = 0; i < i386_num_regs; i++)
+ collect_register (i, ((char *) buf) + i386_regmap[i]);
collect_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
}
static void
-i386_store_gregset (void *buf)
+i386_store_gregset (const void *buf)
{
int i;
- for (i = 0; i < num_regs; i++)
- supply_register (i, ((char *) buf) + regmap[i]);
+ for (i = 0; i < i386_num_regs; i++)
+ supply_register (i, ((char *) buf) + i386_regmap[i]);
supply_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
}
}
static void
-i386_store_fpregset (void *buf)
+i386_store_fpregset (const void *buf)
{
i387_fsave_to_cache (buf);
}
}
static void
-i386_store_fpxregset (void *buf)
+i386_store_fpxregset (const void *buf)
{
i387_fxsave_to_cache (buf);
}
+#endif /* HAVE_PTRACE_GETREGS */
struct regset_info target_regsets[] = {
+#ifdef HAVE_PTRACE_GETREGS
{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
+ GENERAL_REGS,
i386_fill_gregset, i386_store_gregset },
-#ifdef HAVE_PTRACE_GETFPXREGS
+# ifdef HAVE_PTRACE_GETFPXREGS
{ PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, sizeof (elf_fpxregset_t),
+ EXTENDED_REGS,
i386_fill_fpxregset, i386_store_fpxregset },
-#endif
+# endif
{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
+ FP_REGS,
i386_fill_fpregset, i386_store_fpregset },
- { 0, 0, -1, NULL, NULL }
+#endif /* HAVE_PTRACE_GETREGS */
+ { 0, 0, -1, -1, NULL, NULL }
};
-#endif /* HAVE_LINUX_REGSETS */
+static const unsigned char i386_breakpoint[] = { 0xCC };
+#define i386_breakpoint_len 1
+
+extern int debug_threads;
+static CORE_ADDR
+i386_get_pc ()
+{
+ unsigned long pc;
+
+ collect_register_by_name ("eip", &pc);
+
+ if (debug_threads)
+ fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc);
+ return pc;
+}
+
+static void
+i386_set_pc (CORE_ADDR newpc)
+{
+ if (debug_threads)
+ fprintf (stderr, "set pc to %08lx\n", (long) newpc);
+ supply_register_by_name ("eip", &newpc);
+}
+
+static int
+i386_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 = {
+ init_registers_i386_linux,
+ i386_num_regs,
+ i386_regmap,
+ i386_cannot_fetch_register,
+ i386_cannot_store_register,
+ i386_get_pc,
+ i386_set_pc,
+ i386_breakpoint,
+ i386_breakpoint_len,
+ NULL,
+ 1,
+ i386_breakpoint_at,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+};
projects / binutils.git / blobdiff