sysdeps/unix/sysv/linux/i386/sigcontextinfo.h

   1 /* Copyright (C) 1998-2013 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #define SIGCONTEXT struct sigcontext
  20 #define SIGCONTEXT_EXTRA_ARGS
  21 #define GET_PC(ctx)     ((void *) ctx.eip)
  22 #define GET_FRAME(ctx)  ((void *) ctx.ebp)
  23 #define GET_STACK(ctx)  ((void *) ctx.esp_at_signal)
  24 #define CALL_SIGHANDLER(handler, signo, ctx) \
  25 do {                                                                          \
  26   int __tmp1, __tmp2, __tmp3, __tmp4;                                         \
  27   __asm __volatile ("movl\t%%esp, %%edi\n\t"                                  \
  28                     "andl\t$-16, %%esp\n\t"                                   \
  29                     "subl\t%8, %%esp\n\t"                                     \
  30                     "movl\t%%edi, %c8-4(%%esp)\n\t"                           \
  31                     "movl\t%1, 0(%%esp)\n\t"                                  \
  32                     "leal\t4(%%esp), %%edi\n\t"                               \
  33                     "cld\n\t"                                                 \
  34                     "rep\tmovsl\n\t"                                          \
  35                     "call\t*%0\n\t"                                           \
  36                     "cld\n\t"                                                 \
  37                     "movl\t%9, %%ecx\n\t"                                     \
  38                     "subl\t%%edi, %%esi\n\t"                                  \
  39                     "leal\t4(%%esp,%%esi,1), %%edi\n\t"                       \
  40                     "leal\t4(%%esp), %%esi\n\t"                               \
  41                     "rep\tmovsl\n\t"                                          \
  42                     "movl\t%c8-4(%%esp), %%esp\n\t"                           \
  43                     : "=a" (__tmp1), "=d" (__tmp2), "=S" (__tmp3),            \
  44                       "=c" (__tmp4)                                           \
  45                     : "0" (handler), "1" (signo), "2" (&ctx),                 \
  46                       "3" (sizeof (struct sigcontext) / 4),                   \
  47                       "n" ((sizeof (struct sigcontext) + 19) & ~15),          \
  48                       "i" (sizeof (struct sigcontext) / 4)                    \
  49                     : "cc", "edi");                                           \
  50 } while (0)