sysdeps/sparc/setjmp.S

   1 /* Copyright (C) 1991, 1993, 1994, 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <sysdep.h>
  20
  21 #define _ASM 1
  22 #include <jmp_buf.h>
  23
  24 ENTRY (__sigsetjmp)
  25         /* Save our SP and FP; in the delay slot of the jump, save our
  26            return PC.  Save the signal mask if requested with a tail-call
  27            for simplicity; it always returns zero.  */
  28 #ifdef PIC
  29 2:
  30         jmpl 1f,%g2
  31         nop
  32 1:
  33         sethi %hi(_GLOBAL_OFFSET_TABLE_-(2b-.)),%l7
  34         sethi %hi(C_SYMBOL_NAME (__sigjmp_save)), %g3
  35         st    %sp, [%o0 + (JB_SP * 4)]
  36         or    %l7,%lo(_GLOBAL_OFFSET_TABLE_-(2b-.)),%l7
  37         or    %g3,%lo(C_SYMBOL_NAME (__sigjmp_save)), %g3
  38         st    %fp, [%o0 + (JB_FP * 4)]
  39         ld    [%l7+%g3],%g1
  40         jmp   %g1
  41         st   %o7, [%o0+(JB_PC*4)]
  42 #else
  43         sethi %hi(C_SYMBOL_NAME (__sigjmp_save)), %g1
  44         st %sp, [%o0 + (JB_SP*4)]
  45         or %lo(C_SYMBOL_NAME (__sigjmp_save)), %g1, %g1
  46         st %fp, [%o0 + (JB_FP*4)]
  47         jmp %g1
  48          st %o7, [%o0 + (JB_PC*4)]
  49 #endif /* PIC */