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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <bits/armsigctx.h>
  21 #include "kernel-features.h"
  22
  23 #define SIGCONTEXT int _a2, int _a3, int _a4, union k_sigcontext
  24 #define SIGCONTEXT_EXTRA_ARGS _a2, _a3, _a4,
  25
  26 /* The sigcontext structure changed between 2.0 and 2.1 kernels.  On any
  27    modern system we should be able to assume that the "new" format will be
  28    in use.  */
  29 #if __LINUX_KERNEL_VERSION > 131328
  30
  31 #define GET_PC(ctx)     ((void *) ctx.v21.arm_pc)
  32 #define GET_FRAME(ctx)  ADVANCE_STACK_FRAME ((void *) ctx.v21.arm_fp)
  33 #define GET_STACK(ctx)  ((void *) ctx.v21.arm_sp)
  34
  35 #else
  36
  37 #define GET_PC(ctx)     ((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
  38                          ctx.v20.reg.ARM_pc : ctx.v21.arm_pc))
  39 #define GET_FRAME(ctx)  \
  40         ADVANCE_STACK_FRAME((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
  41                          ctx.v20.reg.ARM_fp : ctx.v21.arm_fp))
  42 #define GET_STACK(ctx)  ((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
  43                          ctx.v20.reg.ARM_sp : ctx.v21.arm_sp))
  44
  45 #endif
  46
  47 #define ADVANCE_STACK_FRAME(frm)        \
  48                         ((struct layout *)frm - 1)
  49
  50 #define CALL_SIGHANDLER(handler, signo, ctx) \
  51   (handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))