/* Target-dependent code for GNU/Linux i386.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
Free Software Foundation, Inc.
This file is part of GDB.
#include "i386-tdep.h"
#include "i386-linux-tdep.h"
+#include "linux-tdep.h"
#include "glibc-tdep.h"
#include "solib-svr4.h"
#include "symtab.h"
+#include "arch-utils.h"
+#include "regset.h"
+
+/* Supported register note sections. */
+static struct core_regset_section i386_linux_regset_sections[] =
+{
+ { ".reg", 144 },
+ { ".reg2", 108 },
+ { ".reg-xfp", 512 },
+ { NULL, 0 }
+};
/* Return the name of register REG. */
#define LINUX_SIGTRAMP_LEN (sizeof linux_sigtramp_code)
-/* If NEXT_FRAME unwinds into a sigtramp routine, return the address
- of the start of the routine. Otherwise, return 0. */
+/* If THIS_FRAME is a sigtramp routine, return the address of the
+ start of the routine. Otherwise, return 0. */
static CORE_ADDR
-i386_linux_sigtramp_start (struct frame_info *next_frame)
+i386_linux_sigtramp_start (struct frame_info *this_frame)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
+ CORE_ADDR pc = get_frame_pc (this_frame);
gdb_byte buf[LINUX_SIGTRAMP_LEN];
/* We only recognize a signal trampoline if PC is at the start of
PC is not at the start of the instruction sequence, there will be
a few trailing readable bytes on the stack. */
- if (!safe_frame_unwind_memory (next_frame, pc, buf, LINUX_SIGTRAMP_LEN))
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_SIGTRAMP_LEN))
return 0;
if (buf[0] != LINUX_SIGTRAMP_INSN0)
pc -= adjust;
- if (!safe_frame_unwind_memory (next_frame, pc, buf, LINUX_SIGTRAMP_LEN))
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_SIGTRAMP_LEN))
return 0;
}
#define LINUX_RT_SIGTRAMP_LEN (sizeof linux_rt_sigtramp_code)
-/* If NEXT_FRAME unwinds into an RT sigtramp routine, return the
- address of the start of the routine. Otherwise, return 0. */
+/* If THIS_FRAME is an RT sigtramp routine, return the address of the
+ start of the routine. Otherwise, return 0. */
static CORE_ADDR
-i386_linux_rt_sigtramp_start (struct frame_info *next_frame)
+i386_linux_rt_sigtramp_start (struct frame_info *this_frame)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
+ CORE_ADDR pc = get_frame_pc (this_frame);
gdb_byte buf[LINUX_RT_SIGTRAMP_LEN];
/* We only recognize a signal trampoline if PC is at the start of
PC is not at the start of the instruction sequence, there will be
a few trailing readable bytes on the stack. */
- if (!safe_frame_unwind_memory (next_frame, pc, buf, LINUX_RT_SIGTRAMP_LEN))
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_RT_SIGTRAMP_LEN))
return 0;
if (buf[0] != LINUX_RT_SIGTRAMP_INSN0)
pc -= LINUX_RT_SIGTRAMP_OFFSET1;
- if (!safe_frame_unwind_memory (next_frame, pc, buf,
+ if (!safe_frame_unwind_memory (this_frame, pc, buf,
LINUX_RT_SIGTRAMP_LEN))
return 0;
}
return pc;
}
-/* Return whether the frame preceding NEXT_FRAME corresponds to a
- GNU/Linux sigtramp routine. */
+/* Return whether THIS_FRAME corresponds to a GNU/Linux sigtramp
+ routine. */
static int
-i386_linux_sigtramp_p (struct frame_info *next_frame)
+i386_linux_sigtramp_p (struct frame_info *this_frame)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
+ CORE_ADDR pc = get_frame_pc (this_frame);
char *name;
find_pc_partial_function (pc, &name, NULL, NULL);
be part of the preceding function. This should always be sigaction,
__sigaction, or __libc_sigaction (all aliases to the same function). */
if (name == NULL || strstr (name, "sigaction") != NULL)
- return (i386_linux_sigtramp_start (next_frame) != 0
- || i386_linux_rt_sigtramp_start (next_frame) != 0);
+ return (i386_linux_sigtramp_start (this_frame) != 0
+ || i386_linux_rt_sigtramp_start (this_frame) != 0);
return (strcmp ("__restore", name) == 0
|| strcmp ("__restore_rt", name) == 0);
/* Offset to struct sigcontext in ucontext, from <asm/ucontext.h>. */
#define I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET 20
-/* Assuming NEXT_FRAME is a frame following a GNU/Linux sigtramp
- routine, return the address of the associated sigcontext structure. */
+/* Assuming THIS_FRAME is a GNU/Linux sigtramp routine, return the
+ address of the associated sigcontext structure. */
static CORE_ADDR
-i386_linux_sigcontext_addr (struct frame_info *next_frame)
+i386_linux_sigcontext_addr (struct frame_info *this_frame)
{
CORE_ADDR pc;
CORE_ADDR sp;
gdb_byte buf[4];
- frame_unwind_register (next_frame, I386_ESP_REGNUM, buf);
+ get_frame_register (this_frame, I386_ESP_REGNUM, buf);
sp = extract_unsigned_integer (buf, 4);
- pc = i386_linux_sigtramp_start (next_frame);
+ pc = i386_linux_sigtramp_start (this_frame);
if (pc)
{
/* The sigcontext structure lives on the stack, right after
pointer. Keep in mind that the first instruction of the
sigtramp code is "pop %eax". If the PC is after this
instruction, adjust the returned value accordingly. */
- if (pc == frame_pc_unwind (next_frame))
+ if (pc == get_frame_pc (this_frame))
return sp + 4;
return sp;
}
- pc = i386_linux_rt_sigtramp_start (next_frame);
+ pc = i386_linux_rt_sigtramp_start (this_frame);
if (pc)
{
CORE_ADDR ucontext_addr;
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
+
+ /* Install supported register note sections. */
+ set_gdbarch_core_regset_sections (gdbarch, i386_linux_regset_sections);
+
+ /* Displaced stepping. */
+ set_gdbarch_displaced_step_copy_insn (gdbarch,
+ simple_displaced_step_copy_insn);
+ set_gdbarch_displaced_step_fixup (gdbarch, i386_displaced_step_fixup);
+ set_gdbarch_displaced_step_free_closure (gdbarch,
+ simple_displaced_step_free_closure);
+ set_gdbarch_displaced_step_location (gdbarch,
+ displaced_step_at_entry_point);
+
+ set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
}
/* Provide a prototype to silence -Wmissing-prototypes. */