i386-signal.c

gdb-6.8 Linux下的调试程序 最新版本

/* Unwinder test program for signal frames.

   Copyright 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 3 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, see <http://www.gnu.org/licenses/>.  */

void sigframe (void);
void setup (void);

void
func (void)
{
}

int
main (void)
{
  setup ();
}

/* Create an imitation signal frame.  This will work on any x86 or
   x86-64 target which uses a version of GAS recent enough for
   .cfi_signal_frame (added 2006-02-27 and included in binutils 2.17).
   The default CIE created by gas suffices to unwind from an empty
   function.  */

asm(".text\n"
    "    .align 8\n"
    "    .globl setup\n"
    "setup:\n"
    "    push $sigframe\n"
    "    jmp func\n"
    "\n"
    "    .cfi_startproc\n"
    "    .cfi_signal_frame\n"
    "    nop\n"
    "    .globl sigframe\n"
    "sigframe:\n"
    "    ret\n"
    "    .cfi_endproc");