mirror of
https://github.com/ziglang/zig.git
synced 2024-12-04 02:48:50 +00:00
19ca2415f2
This commit introduces tools/update_glibc.zig to update the start files for next time. Some notable changes in recent glibc: * abi-note.S has been changed to abi-note.c but we resist the change to keep it easier to compile the start files. * elf-init.c has been deleted upstream. Further testing should be done to verify that binaries against glibc omitting elf-init.c still run properly on oldel glibc linux systems. Closes #4926
86 lines
2.7 KiB
C
Vendored
86 lines
2.7 KiB
C
Vendored
/* Copyright (C) 1997-2021 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdeps/generic/sysdep.h>
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
/* Syntactic details of assembler. */
|
|
|
|
# define ALIGNARG(log2) log2
|
|
# 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 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
|
|
/* 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 \
|
|
addik r1,r1,-4; \
|
|
swi r15,r1,0; \
|
|
brlid r15,JUMPTARGET(mcount); \
|
|
nop; \
|
|
lwi r15,r1,0; \
|
|
addik r1,r1,4;
|
|
# else
|
|
# define CALL_MCOUNT /* Do nothing. */
|
|
# endif
|
|
|
|
/* 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
|
|
|
|
# define PSEUDO(name, syscall_name, args) \
|
|
.globl syscall_error; \
|
|
ENTRY (name) \
|
|
DO_CALL (syscall_name, args);
|
|
|
|
# define ret \
|
|
rtsd r15,8; nop;
|
|
|
|
# undef PSEUDO_END
|
|
# define PSEUDO_END(name) \
|
|
END (name)
|
|
|
|
# undef JUMPTARGET
|
|
# ifdef PIC
|
|
# define JUMPTARGET(name) name##@PLTPC
|
|
# else
|
|
# define JUMPTARGET(name) name
|
|
# endif
|
|
|
|
/* Local label name for asm code. */
|
|
# ifndef L
|
|
# define L(name) $L##name
|
|
# endif
|
|
|
|
# endif /* __ASSEMBLER__ */
|