diff options
Diffstat (limited to 'sysdeps/s390/s390-32/setjmp-common.S')
| -rw-r--r-- | sysdeps/s390/s390-32/setjmp-common.S | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/sysdeps/s390/s390-32/setjmp-common.S b/sysdeps/s390/s390-32/setjmp-common.S new file mode 100644 index 0000000000..d7bb720454 --- /dev/null +++ b/sysdeps/s390/s390-32/setjmp-common.S @@ -0,0 +1,84 @@ +/* setjmp for s390, ELF version. + Copyright (C) 2000-2014 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, see + <http://www.gnu.org/licenses/>. */ + +#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 0f /* branch relativ to __sigsetjmp */ +END (setjmp) + + /* Binary compatibility entry point. */ +ENTRY(_setjmp) + .weak C_SYMBOL_NAME (_setjmp) + lhi %r3,0 /* second argument of zero */ + j 0f /* branch relativ to __sigsetjmp */ +END (_setjmp) +libc_hidden_def (_setjmp) + +ENTRY(__setjmp) + lhi %r3,0 /* second argument of zero */ + j 0f /* branch relativ to __sigsetjmp */ +END (__setjmp) + +ENTRY(__sigsetjmp) +0: +#ifdef PTR_MANGLE + stm %r6,%r13,0(%r2) /* store registers in jmp_buf */ + lr %r4,%r14 + lr %r5,%r15 + PTR_MANGLE (%r4, %r1) + PTR_MANGLE2 (%r5, %r1) + stm %r4,%r5,32(%r2) +#else + stm %r6,%r15,0(%r2) /* store registers in jmp_buf */ +#endif +#ifndef __V1_JMPBUF + lhi %r4,0 + st %r4,56(%r2) /* Set __flags to 0. */ +#endif + std %f4,40(%r2) + std %f6,48(%r2) +#if defined NOT_IN_libc && defined IS_IN_rtld + /* In ld.so we never save the signal mask. */ + lhi %r2,0 + br %r14 +#elif defined 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 +0: al %r1,1f-0b(0,%r1) /* get address of global offset table */ + /* get address of __sigjmp_save from got */ + l %r1,__sigjmp_save@GOT12(0,%r1) + br %r1 +1: .long _GLOBAL_OFFSET_TABLE_ - 0b +#else + basr %r1,0 +0: l %r1,1f-0b(0,%r1) /* load address of __sigjmp_save */ + br %r1 /* tail-call __sigjmp_save */ +1: .long __sigjmp_save +#endif +END (__sigsetjmp) |