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/* setjmp for s390, ELF version.
Copyright (C) 2000, 2002 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#define _ASM
#define _SETJMP_H
#include <bits/setjmp.h>
/* We include the BSD entry points here as well but we make
them weak. */
ENTRY (setjmp)
.weak C_SYMBOL_NAME (setjmp)
lhi %r3,1 /* second argument of one */
j .Linternal_sigsetjmp /* branch relativ to __sigsetjmp */
END (setjmp)
/* Binary compatibility entry point. */
ENTRY(_setjmp)
.weak C_SYMBOL_NAME (_setjmp)
strong_alias (_setjmp, __GI__setjmp)
ENTRY(__setjmp)
lhi %r3,0 /* second argument of zero */
ENTRY(__sigsetjmp)
.Linternal_sigsetjmp:
stm %r6,%r15,0(%r2) /* store registers in jmp_buf */
std %f4,40(%r2)
std %f6,48(%r2)
#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)
br %r1
.L1: .long _GLOBAL_OFFSET_TABLE_ - .L0
#else
basr %r1,0
.L0: l %r1,.L1-.L0(0,%r1) /* load address of __sigjmp_save */
br %r1 /* tail-call __sigjmp_save */
.L1: .long __sigjmp_save
#endif
END (__sigsetjmp)
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