2000-08-02 15:15:00 +00:00
|
|
|
/* Assembler macros for s390.
|
2003-01-09 20:30:21 +00:00
|
|
|
Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
|
2000-08-02 15:15:00 +00:00
|
|
|
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
|
2001-07-06 04:58:11 +00:00
|
|
|
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.
|
2000-08-02 15:15:00 +00:00
|
|
|
|
|
|
|
|
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
|
2001-07-06 04:58:11 +00:00
|
|
|
Lesser General Public License for more details.
|
2000-08-02 15:15:00 +00:00
|
|
|
|
2001-07-06 04:58:11 +00:00
|
|
|
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. */
|
2000-08-02 15:15:00 +00:00
|
|
|
|
|
|
|
|
#include <sysdeps/generic/sysdep.h>
|
|
|
|
|
|
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
|
|
|
|
|
|
/* Syntactic details of assembler. */
|
|
|
|
|
|
|
|
|
|
#ifdef HAVE_ELF
|
|
|
|
|
|
|
|
|
|
/* 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;
|
|
|
|
|
|
|
|
|
|
/* In ELF C symbols are asm symbols. */
|
|
|
|
|
#undef NO_UNDERSCORES
|
|
|
|
|
#define NO_UNDERSCORES
|
|
|
|
|
|
|
|
|
|
#else
|
|
|
|
|
|
|
|
|
|
#define ALIGNARG(log2) log2
|
|
|
|
|
#define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */
|
|
|
|
|
#define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* 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) \
|
|
|
|
|
CALL_MCOUNT
|
|
|
|
|
|
|
|
|
|
#undef END
|
|
|
|
|
#define END(name) \
|
|
|
|
|
ASM_SIZE_DIRECTIVE(name) \
|
|
|
|
|
|
|
|
|
|
/* If compiled for profiling, call `mcount' at the start of each function. */
|
|
|
|
|
#ifdef PROF
|
|
|
|
|
#ifdef PIC
|
|
|
|
|
#define CALL_MCOUNT \
|
|
|
|
|
lr 0,14 ; bras 14,.+12 ; .long _GLOBAL_OFFSET_TABLE_ - . ; .long 0f-. ; \
|
|
|
|
|
lr 1,14 ; al 1,4(14) ; al 14,0(14) ; l 14,_mcount@GOT(14) ; \
|
|
|
|
|
basr 14,14 ; lr 14,0 ; .data ; .align 4 ; 0: .long 0 ; .text ;
|
|
|
|
|
#else
|
|
|
|
|
#define CALL_MCOUNT \
|
|
|
|
|
lr 0,14 ; bras 14,.+12 ; .long _mcount ; .long 0f ; \
|
|
|
|
|
l 1,4(14) ; l 14,0(14) ; basr 14,14 ; lr 14,0 ; \
|
|
|
|
|
.data ; .align 4 ; 0: .long 0 ; .text ;
|
|
|
|
|
#endif
|
|
|
|
|
#else
|
|
|
|
|
#define CALL_MCOUNT /* Do nothing. */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#ifdef NO_UNDERSCORES
|
|
|
|
|
/* 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
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#define PSEUDO(name, syscall_name, args) \
|
|
|
|
|
lose: SYSCALL_PIC_SETUP \
|
|
|
|
|
JUMPTARGET(syscall_error) \
|
|
|
|
|
.globl syscall_error; \
|
|
|
|
|
ENTRY (name) \
|
|
|
|
|
DO_CALL (syscall_name, args); \
|
|
|
|
|
jm lose
|
|
|
|
|
|
|
|
|
|
#undef PSEUDO_END
|
|
|
|
|
#define PSEUDO_END(name) \
|
|
|
|
|
END (name)
|
|
|
|
|
|
2003-01-09 20:30:21 +00:00
|
|
|
#undef JUMPTARGET
|
2000-08-02 15:15:00 +00:00
|
|
|
#ifdef PIC
|
|
|
|
|
#define JUMPTARGET(name) \
|
|
|
|
|
basr %r1,0 \
|
|
|
|
|
0: al %r1,1f-0b(0,%r1) \
|
|
|
|
|
br %r1 \
|
|
|
|
|
1: .long name##@PLT - 0b
|
|
|
|
|
#define SYSCALL_PIC_SETUP \
|
|
|
|
|
bras %r12,1f \
|
|
|
|
|
0: .long _GLOBAL_OFFSET_TABLE_-0b \
|
|
|
|
|
1: al %r12,0(%r12)
|
|
|
|
|
#else
|
|
|
|
|
#define JUMPTARGET(name) \
|
|
|
|
|
basr %r1,0 \
|
|
|
|
|
0: al %r1,1f-0b(0,%r1) \
|
|
|
|
|
br %r1 \
|
|
|
|
|
1: .long name - 0b
|
|
|
|
|
#define SYSCALL_PIC_SETUP /* Nothing. */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Local label name for asm code. */
|
|
|
|
|
#ifndef L
|
|
|
|
|
#define L(name) name
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#endif /* __ASSEMBLER__ */
|
