sysdeps/unix/sysv/linux/sparc/sparc64/longjmp.S

   1 /* Copyright (C) 1997-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Richard Henderson (rth@tamu.edu).
   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 /* longjmp is implemented in terms of the setcontext trap on Linux/Sparc64.  */
  20
  21 #include <sysdep.h>
  22
  23 /* Offsets into the jmp_buf structure.  */
  24
  25 #define O_mask_was_saved        512
  26 #define O_gregs                 32
  27 #define O_g1                    (O_gregs + 4*8)
  28
  29
  30 /* void longjmp (sigjmp_buf env, int val) */
  31
  32 ENTRY(__libc_siglongjmp)
  33
  34         /* Modify the context with the value we want to return.  */
  35         movre   %o1, 1, %o1
  36         stx     %o1, [%o0 + O_g1]
  37
  38         /* Let setcontext know if we want to modify the current sigmask. */
  39         ld      [%o0 + O_mask_was_saved], %o1
  40
  41         /* And bamf back to where we belong!  */
  42         ta      0x6f
  43
  44 END(__libc_siglongjmp)
  45
  46 strong_alias(__libc_siglongjmp, __longjmp)
  47 strong_alias(__libc_siglongjmp, __libc_longjmp)
  48 libc_hidden_def (__libc_longjmp)
  49 weak_alias (__libc_siglongjmp, longjmp)
  50 weak_alias (__libc_siglongjmp, _longjmp)
  51 weak_alias (__libc_siglongjmp, siglongjmp)