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

   1 /* Copyright (C) 1999, 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Philip Blundell <philb@gnu.org>, 1999.
   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 #include <sys/ucontext.h>
  20 #include "kernel-features.h"
  21
  22 #define SIGCONTEXT siginfo_t *_si, struct ucontext *
  23 #define SIGCONTEXT_EXTRA_ARGS _si,
  24
  25 /* The sigcontext structure changed between 2.0 and 2.1 kernels.  On any
  26    modern system we should be able to assume that the "new" format will be
  27    in use.  */
  28
  29 #define GET_PC(ctx)     ((void *) (ctx)->uc_mcontext.arm_pc)
  30 #define GET_FRAME(ctx)  ADVANCE_STACK_FRAME ((void *) ctx->uc_mcontext.arm_fp)
  31 #define GET_STACK(ctx)  ((void *) (ctx)->uc_mcontext.arm_sp)
  32
  33 #define ADVANCE_STACK_FRAME(frm)        \
  34                         ((struct layout *)frm - 1)
  35
  36 #define CALL_SIGHANDLER(handler, signo, ctx) \
  37   (handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))
  38
  39 /* There is no reliable way to get the sigcontext unless we use a
  40    three-argument signal handler.  */
  41 #define __sigaction(sig, act, oact) ({ \
  42   (act)->sa_flags |= SA_SIGINFO; \
  43   (__sigaction) (sig, act, oact); \
  44 })
  45
  46 #define sigaction(sig, act, oact) ({ \
  47   (act)->sa_flags |= SA_SIGINFO; \
  48   (sigaction) (sig, act, oact); \
  49 })