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glibc/sysdeps/powerpc/powerpc32/sysdep.h
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/* Assembly macros for 32-bit PowerPC. | |
Copyright (C) 1999, 2001, 2002, 2003, 2006 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 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, write to the Free | |
Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA | |
02110-1301 USA. */ | |
#include <sysdeps/powerpc/sysdep.h> | |
#ifdef __ASSEMBLER__ | |
#ifdef __ELF__ | |
/* If compiled for profiling, call `_mcount' at the start of each | |
function. */ | |
#ifdef PROF | |
/* The mcount code relies on a the return address being on the stack | |
to locate our caller and so it can restore it; so store one just | |
for its benefit. */ | |
# define CALL_MCOUNT \ | |
mflr r0; \ | |
stw r0,4(r1); \ | |
cfi_offset (lr, 4); \ | |
bl JUMPTARGET(_mcount); | |
#else /* PROF */ | |
# define CALL_MCOUNT /* Do nothing. */ | |
#endif /* PROF */ | |
#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 | |
#define EALIGN_W_0 /* No words to insert. */ | |
#define EALIGN_W_1 nop | |
#define EALIGN_W_2 nop;nop | |
#define EALIGN_W_3 nop;nop;nop | |
#define EALIGN_W_4 EALIGN_W_3;nop | |
#define EALIGN_W_5 EALIGN_W_4;nop | |
#define EALIGN_W_6 EALIGN_W_5;nop | |
#define EALIGN_W_7 EALIGN_W_6;nop | |
/* EALIGN is like ENTRY, but does alignment to 'words'*4 bytes | |
past a 2^align boundary. */ | |
#ifdef PROF | |
# define EALIGN(name, alignt, words) \ | |
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 \ | |
b 0f; \ | |
.align ALIGNARG(alignt); \ | |
EALIGN_W_##words; \ | |
0: | |
#else /* PROF */ | |
# define EALIGN(name, alignt, words) \ | |
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \ | |
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \ | |
.align ALIGNARG(alignt); \ | |
EALIGN_W_##words; \ | |
C_LABEL(name) \ | |
cfi_startproc; | |
#endif | |
#undef END | |
#define END(name) \ | |
cfi_endproc; \ | |
ASM_SIZE_DIRECTIVE(name) | |
#define DO_CALL(syscall) \ | |
li 0,syscall; \ | |
sc | |
#undef JUMPTARGET | |
#ifdef PIC | |
# define JUMPTARGET(name) name##@plt | |
#else | |
# define JUMPTARGET(name) name | |
#endif | |
#if defined SHARED && defined DO_VERSIONING && defined PIC \ | |
&& !defined HAVE_BROKEN_ALIAS_ATTRIBUTE && !defined NO_HIDDEN | |
# undef HIDDEN_JUMPTARGET | |
# define HIDDEN_JUMPTARGET(name) __GI_##name##@local | |
#endif | |
#define PSEUDO(name, syscall_name, args) \ | |
.section ".text"; \ | |
ENTRY (name) \ | |
DO_CALL (SYS_ify (syscall_name)); | |
#define PSEUDO_RET \ | |
bnslr+; \ | |
b __syscall_error@local | |
#define ret PSEUDO_RET | |
#undef PSEUDO_END | |
#define PSEUDO_END(name) \ | |
END (name) | |
#define PSEUDO_NOERRNO(name, syscall_name, args) \ | |
.section ".text"; \ | |
ENTRY (name) \ | |
DO_CALL (SYS_ify (syscall_name)); | |
#define PSEUDO_RET_NOERRNO \ | |
blr | |
#define ret_NOERRNO PSEUDO_RET_NOERRNO | |
#undef PSEUDO_END_NOERRNO | |
#define PSEUDO_END_NOERRNO(name) \ | |
END (name) | |
#define PSEUDO_ERRVAL(name, syscall_name, args) \ | |
.section ".text"; \ | |
ENTRY (name) \ | |
DO_CALL (SYS_ify (syscall_name)); | |
#define PSEUDO_RET_ERRVAL \ | |
blr | |
#define ret_ERRVAL PSEUDO_RET_ERRVAL | |
#undef PSEUDO_END_ERRVAL | |
#define PSEUDO_END_ERRVAL(name) \ | |
END (name) | |
/* Local labels stripped out by the linker. */ | |
#undef L | |
#define L(x) .L##x | |
/* Label in text section. */ | |
#define C_TEXT(name) name | |
#endif /* __ELF__ */ | |
#endif /* __ASSEMBLER__ */ |