diff options
Diffstat (limited to 'sysdeps/s390/s390-64/crti.S')
-rw-r--r-- | sysdeps/s390/s390-64/crti.S | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/sysdeps/s390/s390-64/crti.S b/sysdeps/s390/s390-64/crti.S new file mode 100644 index 0000000000..7605f2dccf --- /dev/null +++ b/sysdeps/s390/s390-64/crti.S @@ -0,0 +1,91 @@ +/* Special .init and .fini section support for 64 bit S/390. + Copyright (C) 2001, 2012 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. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file with other + programs, and to distribute those programs without any restriction + coming from the use of this file. (The GNU Lesser General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into another program.) + + Note that people who make modified versions of this file are not + obligated to grant this special exception for their modified + versions; it is their choice whether to do so. The GNU Lesser + General Public License gives permission to release a modified + version without this exception; this exception also makes it + possible to release a modified version which carries forward this + exception. + + 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/>. */ + +/* crti.S puts a function prologue at the beginning of the .init and + .fini sections and defines global symbols for those addresses, so + they can be called as functions. The symbols _init and _fini are + magic and cause the linker to emit DT_INIT and DT_FINI. */ + +#include <libc-symbols.h> +#include <sysdep.h> + +#ifndef PREINIT_FUNCTION +# define PREINIT_FUNCTION __gmon_start__ +#endif + +#ifndef PREINIT_FUNCTION_WEAK +# define PREINIT_FUNCTION_WEAK 1 +#endif + +#if PREINIT_FUNCTION_WEAK + weak_extern (PREINIT_FUNCTION) +#else + .hidden PREINIT_FUNCTION +#endif + + .section .init,"ax",@progbits + .align 4 + .globl _init + .type _init,@function +_init: + stmg %r6,%r15,48(%r15) + lgr %r1,%r15 + aghi %r15,-160 + stg %r1,0(%r15) + larl %r12,_GLOBAL_OFFSET_TABLE_ +#if PREINIT_FUNCTION_WEAK + larl %r1,PREINIT_FUNCTION@GOTENT + lg %r1,0(%r1) + ltgr %r1,%r1 + je 1f + basr %r14,%r1 +#else + brasl %r14,PREINIT_FUNCTION +#endif + .align 4,0x07 +1: + + .section .fini,"ax",@progbits + .align 4 + .globl _fini + .type _fini,@function +_fini: + stmg %r6,%r15,48(%r15) + lgr %r1,%r15 + aghi %r15,-160 + stg %r1,0(%r15) + larl %r12,_GLOBAL_OFFSET_TABLE_ + .align 4,0x07 |