mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 19:00:07 +00:00
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/* Copyright (C) 1997-2015 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdeps/generic/sysdep.h>
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
/* Syntactic details of assembler. */
|
|
|
|
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
|
|
|
|
/* Define an entry point visible from C. */
|
|
#define ENTRY(name) \
|
|
.globl C_SYMBOL_NAME(name); \
|
|
.type C_SYMBOL_NAME(name),%function; \
|
|
.align 4; \
|
|
C_LABEL(name) \
|
|
cfi_startproc; \
|
|
CALL_MCOUNT
|
|
|
|
/* Define an entry point visible from C. */
|
|
#define ENTRY_ALIGN(name, align) \
|
|
.globl C_SYMBOL_NAME(name); \
|
|
.type C_SYMBOL_NAME(name),%function; \
|
|
.p2align align; \
|
|
C_LABEL(name) \
|
|
cfi_startproc; \
|
|
CALL_MCOUNT
|
|
|
|
/* Define an entry point visible from C with a specified alignment and
|
|
pre-padding with NOPs. This can be used to ensure that a critical
|
|
loop within a function is cache line aligned. Note this version
|
|
does not adjust the padding if CALL_MCOUNT is defined. */
|
|
|
|
#define ENTRY_ALIGN_AND_PAD(name, align, padding) \
|
|
.globl C_SYMBOL_NAME(name); \
|
|
.type C_SYMBOL_NAME(name),%function; \
|
|
.p2align align; \
|
|
.rep padding; \
|
|
nop; \
|
|
.endr; \
|
|
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
|
|
# define CALL_MCOUNT \
|
|
str x30, [sp, #-16]!; \
|
|
bl mcount; \
|
|
ldr x30, [sp], #16 ;
|
|
#else
|
|
# define CALL_MCOUNT /* Do nothing. */
|
|
#endif
|
|
|
|
/* Local label name for asm code. */
|
|
#ifndef L
|
|
# define L(name) .L##name
|
|
#endif
|
|
|
|
/* Load or store to/from a pc-relative EXPR into/from R, using T. */
|
|
#define LDST_PCREL(OP, R, T, EXPR) \
|
|
adrp T, EXPR; \
|
|
OP R, [T, #:lo12:EXPR];\
|
|
|
|
/* Load or store to/from a got-relative EXPR into/from R, using T. */
|
|
#define LDST_GLOBAL(OP, R, T, EXPR) \
|
|
adrp T, :got:EXPR; \
|
|
ldr T, [T, #:got_lo12:EXPR];\
|
|
OP R, [T];
|
|
|
|
/* 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 /* __ASSEMBLER__ */
|