mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 16:50:07 +00:00
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/* Assembler macros for 64 bit S/390.
|
|
Copyright (C) 2001, 2003, 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.
|
|
|
|
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 <sysdeps/generic/sysdep.h>
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
/* Syntactic details of assembler. */
|
|
|
|
/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */
|
|
#define ALIGNARG(log2) 1<<log2
|
|
/* For ELF we need the `.type' directive to make shared libs work right. */
|
|
#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
|
|
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
|
|
|
|
|
|
/* Define an entry point visible from C. */
|
|
#define ENTRY(name) \
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
|
|
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
|
|
.align ALIGNARG(2); \
|
|
C_LABEL(name) \
|
|
cfi_startproc; \
|
|
CALL_MCOUNT
|
|
|
|
#undef END
|
|
#define END(name) \
|
|
cfi_endproc; \
|
|
ASM_SIZE_DIRECTIVE(name) \
|
|
|
|
/* If compiled for profiling, call `mcount' at the start of each function. */
|
|
#ifdef PROF
|
|
#ifdef PIC
|
|
#define CALL_MCOUNT \
|
|
lgr 0,14 ; larl 1,0f ; brasl 14,_mcount@PLT ; lgr 14,0 ; \
|
|
.data ; .align 4 ; 0: .long 0 ; .text ;
|
|
#else
|
|
#define CALL_MCOUNT \
|
|
lgr 0,14 ; larl 1,0f ; brasl 14,_mcount ; lgr 14,0 ; \
|
|
.data ; .align 4 ; 0: .long 0 ; .text ;
|
|
#endif
|
|
#else
|
|
#define CALL_MCOUNT /* Do nothing. */
|
|
#endif
|
|
|
|
/* Since C identifiers are not normally prefixed with an underscore
|
|
on this system, the asm identifier `syscall_error' intrudes on the
|
|
C name space. Make sure we use an innocuous name. */
|
|
#define syscall_error __syscall_error
|
|
#define mcount _mcount
|
|
|
|
#define PSEUDO(name, syscall_name, args) \
|
|
lose: SYSCALL_PIC_SETUP \
|
|
jg JUMPTARGET(syscall_error); \
|
|
.globl syscall_error; \
|
|
ENTRY (name) \
|
|
DO_CALL (syscall_name, args); \
|
|
jm lose
|
|
|
|
#undef PSEUDO_END
|
|
#define PSEUDO_END(name) \
|
|
END (name)
|
|
|
|
#undef JUMPTARGET
|
|
#ifdef PIC
|
|
#define JUMPTARGET(name) name##@PLT
|
|
#define SYSCALL_PIC_SETUP \
|
|
larl %r12,_GLOBAL_OFFSET_TABLE_
|
|
#else
|
|
#define JUMPTARGET(name) name
|
|
#define SYSCALL_PIC_SETUP /* Nothing. */
|
|
#endif
|
|
|
|
/* Local label name for asm code. */
|
|
#ifndef L
|
|
#define L(name) .L##name
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLER__ */
|