/* Target-dependent code for GNU/Linux i386.
- Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright 2000, 2001, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
This file is part of GDB.
#include "inferior.h"
#include "osabi.h"
#include "reggroups.h"
-
+#include "dwarf2-frame.h"
#include "gdb_string.h"
#include "i386-tdep.h"
#define LINUX_SIGTRAMP_INSN2 0xcd /* int */
#define LINUX_SIGTRAMP_OFFSET2 6
-static const unsigned char linux_sigtramp_code[] =
+static const gdb_byte linux_sigtramp_code[] =
{
LINUX_SIGTRAMP_INSN0, /* pop %eax */
LINUX_SIGTRAMP_INSN1, 0x77, 0x00, 0x00, 0x00, /* mov $0x77, %eax */
i386_linux_sigtramp_start (struct frame_info *next_frame)
{
CORE_ADDR pc = frame_pc_unwind (next_frame);
- unsigned char buf[LINUX_SIGTRAMP_LEN];
+ gdb_byte buf[LINUX_SIGTRAMP_LEN];
/* We only recognize a signal trampoline if PC is at the start of
one of the three instructions. We optimize for finding the PC at
#define LINUX_RT_SIGTRAMP_INSN1 0xcd /* int */
#define LINUX_RT_SIGTRAMP_OFFSET1 5
-static const unsigned char linux_rt_sigtramp_code[] =
+static const gdb_byte linux_rt_sigtramp_code[] =
{
LINUX_RT_SIGTRAMP_INSN0, 0xad, 0x00, 0x00, 0x00, /* mov $0xad, %eax */
LINUX_RT_SIGTRAMP_INSN1, 0x80 /* int $0x80 */
i386_linux_rt_sigtramp_start (struct frame_info *next_frame)
{
CORE_ADDR pc = frame_pc_unwind (next_frame);
- unsigned char buf[LINUX_RT_SIGTRAMP_LEN];
+ gdb_byte buf[LINUX_RT_SIGTRAMP_LEN];
/* We only recognize a signal trampoline if PC is at the start of
one of the two instructions. We optimize for finding the PC at
|| strcmp ("__restore_rt", name) == 0);
}
+/* Return one if the unwound PC from NEXT_FRAME is in a signal trampoline
+ which may have DWARF-2 CFI. */
+
+static int
+i386_linux_dwarf_signal_frame_p (struct gdbarch *gdbarch,
+ struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ char *name;
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
+
+ /* If a vsyscall DSO is in use, the signal trampolines may have these
+ names. */
+ if (name && (strcmp (name, "__kernel_sigreturn") == 0
+ || strcmp (name, "__kernel_rt_sigreturn") == 0))
+ return 1;
+
+ return 0;
+}
+
/* Offset to struct sigcontext in ucontext, from <asm/ucontext.h>. */
#define I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET 20
{
CORE_ADDR pc;
CORE_ADDR sp;
- char buf[4];
+ gdb_byte buf[4];
frame_unwind_register (next_frame, I386_ESP_REGNUM, buf);
sp = extract_unsigned_integer (buf, 4);
return ucontext_addr + I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET;
}
- error ("Couldn't recognize signal trampoline.");
+ error (_("Couldn't recognize signal trampoline."));
return 0;
}
/* GNU/Linux uses the dynamic linker included in the GNU C Library. */
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
+
+ dwarf2_frame_set_signal_frame_p (gdbarch, i386_linux_dwarf_signal_frame_p);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
}
/* Provide a prototype to silence -Wmissing-prototypes. */