sysdeps/mips/mips64/bsd-_setjmp.S

   1 /* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'.  MIPS64 version.
   2    Copyright (C) 1996-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 /* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
  20    We cannot do it in C because it must be a tail-call, so frame-unwinding
  21    in setjmp doesn't clobber the state restored by longjmp.  */
  22
  23 #include <sgidefs.h>
  24 #include <sysdep.h>
  25 #include <sys/asm.h>
  26
  27 #ifdef __PIC__
  28         .option pic2
  29 #endif
  30 ENTRY (_setjmp)
  31 #ifdef __PIC__
  32         SETUP_GP
  33 #endif
  34         SETUP_GP64_REG (v0, C_SYMBOL_NAME (_setjmp))
  35         PTR_LA t9, C_SYMBOL_NAME (__sigsetjmp)
  36 #if _MIPS_SIM == _ABIO32
  37         nop
  38 #endif
  39         RESTORE_GP64_REG
  40         move    a1, zero                /* Pass a second argument of zero.  */
  41 #ifdef __PIC__
  42         jr      t9
  43 #else
  44         j       C_SYMBOL_NAME (__sigsetjmp)
  45 #endif
  46 END (_setjmp)
  47 libc_hidden_def (_setjmp)