sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c

   1 /* POSIX.1 sigaction call for Linux/SPARC.
   2    Copyright (C) 1997-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Miguel de Icaza <miguel@nuclecu.unam.mx>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <string.h>
  21 #include <syscall.h>
  22 #include <sys/signal.h>
  23 #include <errno.h>
  24 #include <kernel_sigaction.h>
  25 #include <sysdep.h>
  26
  27 static void __rt_sigreturn_stub (void);
  28 static void __sigreturn_stub (void);
  29
  30 #define STUB(act) \
  31   (act) ? ((unsigned long)((act->sa_flags & SA_SIGINFO) \
  32                             ? &__rt_sigreturn_stub      \
  33                             : &__sigreturn_stub) - 8)   \
  34         : 0,
  35
  36 #include <sysdeps/unix/sysv/linux/sigaction.c>
  37
  38 static
  39 inhibit_stack_protector
  40 void
  41 __rt_sigreturn_stub (void)
  42 {
  43   __asm__ ("mov %0, %%g1\n\t"
  44            "ta  0x10\n\t"
  45            : /* no outputs */
  46            : "i" (__NR_rt_sigreturn));
  47 }
  48
  49 static
  50 inhibit_stack_protector
  51 void
  52 __sigreturn_stub (void)
  53 {
  54   __asm__ ("mov %0, %%g1\n\t"
  55            "ta  0x10\n\t"
  56            : /* no outputs */
  57            : "i" (__NR_sigreturn));
  58 }