93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/* Assembler macros for ARM.
|
|
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
|
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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <sysdeps/generic/sysdep.h>
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
/* Syntactic details of assembler. */
|
|
|
|
#ifdef HAVE_ELF
|
|
|
|
#define ALIGNARG(log2) 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
|
|
|
|
#define PLTJMP(_x) _x##(PLT)
|
|
|
|
#else
|
|
|
|
#define ALIGNARG(log2) log2
|
|
#define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */
|
|
#define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */
|
|
|
|
#define PLTJMP(_x) _x
|
|
|
|
#endif
|
|
|
|
/* APCS-32 doesn't preserve the condition codes across function call. */
|
|
#ifdef __APCS_32__
|
|
#define LOADREGS(cond, base, reglist...)\
|
|
ldm##cond base,reglist
|
|
#define RETINSTR(instr, regs...)\
|
|
instr regs
|
|
#else /* APCS-26 */
|
|
#define LOADREGS(cond, base, reglist...)\
|
|
ldm##cond base,reglist^
|
|
#define RETINSTR(instr, regs...)\
|
|
instr##s regs
|
|
#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(4); \
|
|
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
|
|
#define CALL_MCOUNT \
|
|
str lr,[sp, #-4]! ; \
|
|
bl PLTJMP(mcount) ; \
|
|
ldr lr, [sp], #4
|
|
#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
|
|
|
|
#endif /* __ASSEMBLER__ */
|