sysdeps/mips/mips64/bsd-_setjmp.S

   1 /* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'.  MIPS64 version.
   2    Copyright (C) 1996, 1997, 2000, 2002, 2003, 2004
   3         Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 /* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
  22    We cannot do it in C because it must be a tail-call, so frame-unwinding
  23    in setjmp doesn't clobber the state restored by longjmp.  */
  24
  25 #include <sgidefs.h>
  26 #include <sysdep.h>
  27 #include <sys/asm.h>
  28
  29 #ifdef __PIC__
  30         .option pic2
  31 #endif
  32 ENTRY (_setjmp)
  33 #ifdef __PIC__
  34         SETUP_GP
  35 #endif
  36         SETUP_GP64 (v0, C_SYMBOL_NAME (_setjmp))
  37         PTR_LA t9, C_SYMBOL_NAME (__sigsetjmp)
  38 #if _MIPS_SIM == _ABIO32
  39         nop
  40 #endif
  41         RESTORE_GP64
  42         move    a1, zero                /* Pass a second argument of zero.  */
  43 #ifdef __PIC__
  44         jr      t9
  45 #else
  46         j       C_SYMBOL_NAME (__sigsetjmp)
  47 #endif
  48         .end    _setjmp
  49 libc_hidden_def (_setjmp)