diff options
Diffstat (limited to 'sysdeps/s390/bsd-setjmp.S')
| -rw-r--r-- | sysdeps/s390/bsd-setjmp.S | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/sysdeps/s390/bsd-setjmp.S b/sysdeps/s390/bsd-setjmp.S new file mode 100644 index 0000000..ab5aa0c --- /dev/null +++ b/sysdeps/s390/bsd-setjmp.S @@ -0,0 +1,46 @@ +/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. s390 version. + Copyright (C) 2000 Free Software Foundation, Inc. + Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). + This file is part of the GNU C Library. + + The GNU C Library is free software ; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation ; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY ; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* This just does a tail-call to `__sigsetjmp (ARG, 1)'. + We cannot do it in C because it must be a tail-call, so frame-unwinding + in setjmp doesn't clobber the state restored by longjmp. */ + +#include <sysdep.h> + +ENTRY(setjmp) +#ifdef PIC + /* We cannot use the PLT, because it requires that %r12 be set, but + we can't save and restore our caller's value. Instead, we do an + indirect jump through the GOT. */ + basr %r1,0 +.L0: al %r1,.L1 - .L0(0,%r1) /* get address of global offset table */ + /* get address of __sigjmp_save from got */ + l %r1,__sigjmp_save@GOT12(0,%r1) + lhi %r3,1 /* second argument of one */ + br %r1 +.L1: .long _GLOBAL_OFFSET_TABLE_ - .L0 +#else + basr %r1,0 +.L0: l %r1,.L1 - .L0(0,%r1) /* load address of __sigsetjmp */ + lhi %r3,1 /* second argument of zero */ + br %r1 /* branch to __sigsetjmp */ +.L1: .long __sigsetjmp +#endif +END (setjmp) |