diff options
Diffstat (limited to 'sysdeps/arm/sysdep.h')
| -rw-r--r-- | sysdeps/arm/sysdep.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/sysdeps/arm/sysdep.h b/sysdeps/arm/sysdep.h new file mode 100644 index 0000000000..b7964a35b1 --- /dev/null +++ b/sysdeps/arm/sysdep.h @@ -0,0 +1,92 @@ +/* Assembler macros for ARM. + Copyright (C) 1997 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 + +/* 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 + +/* ARM 6 needs slightly different handling */ +#ifdef __arm6__ +#define LOADREGS(cond, base, reglist...)\ + ldm##cond base,reglist +#define RETINSTR(instr, regs...)\ + instr regs +#else /* arm 3 */ +#define LOADREGS(cond, base, reglist...)\ + ldm##cond base,reglist^ +#define RETINSTR(instr, regs...)\ + instr##s regs +#endif + +/* Don't do floating point */ +#define __ARM_USES_FP 1 + +/* 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 +/* The mcount code relies on a normal frame pointer being on the stack + to locate our caller, so push one just for its benefit. */ +#define CALL_MCOUNT \ +#error Profiling not supported. +#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 */ |