diff options
author | H.J. Lu <hjl.tools@gmail.com> | 2017-11-01 05:37:10 -0700 |
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committer | H.J. Lu <hjl.tools@gmail.com> | 2017-11-01 05:37:26 -0700 |
commit | 95b93c6e0d7bf0321f265cf6e85c7fb4417cbda6 (patch) | |
tree | f43d997aba07996bd5f6b7ed8035920dcc4c2d0f /sysdeps/x86 | |
parent | 1bb3653925eae1226cd18a3d700371291850b20f (diff) | |
download | glibc-95b93c6e0d7bf0321f265cf6e85c7fb4417cbda6.tar.gz |
x86: Add sysdeps/x86/sysdep.h
Add a new header file, sysdeps/x86/sysdep.h, for common assembly code
macros between i386 and x86-64. Tested on i686 and x86-64. There are
no differences in outputs of "readelf -a" and "objdump -dw" on all glibc
shared objects before and after the patch.
* sysdeps/i386/sysdep.h: Include <sysdeps/x86/sysdep.h> instead
of <sysdeps/generic/sysdep.h>.
(ALIGNARG): Removed.
(ASM_SIZE_DIRECTIVE): Likewise.
(ENTRY): Likewise.
(END): Likewise.
(ENTRY_CHK): Likewise.
(END_CHK): Likewise.
(syscall_error): Likewise.
(mcount): Likewise.
(PSEUDO_END): Likewise.
(L): Likewise.
(atom_text_section): Likewise.
* sysdeps/x86/sysdep.h: New file.
* sysdeps/x86_64/sysdep.h: Include <sysdeps/x86/sysdep.h> instead
of <sysdeps/generic/sysdep.h>.
(ALIGNARG): Removed.
(ASM_SIZE_DIRECTIVE): Likewise.
(ENTRY): Likewise.
(END): Likewise.
(ENTRY_CHK): Likewise.
(END_CHK): Likewise.
(syscall_error): Likewise.
(mcount): Likewise.
(PSEUDO_END): Likewise.
(L): Likewise.
(atom_text_section): Likewise.
Diffstat (limited to 'sysdeps/x86')
-rw-r--r-- | sysdeps/x86/sysdep.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sysdeps/x86/sysdep.h b/sysdeps/x86/sysdep.h new file mode 100644 index 0000000000..eb25e4b658 --- /dev/null +++ b/sysdeps/x86/sysdep.h @@ -0,0 +1,69 @@ +/* Assembler macros for x86. + Copyright (C) 2017 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/>. */ + +#ifndef _X86_SYSDEP_H +#define _X86_SYSDEP_H 1 + +#include <sysdeps/generic/sysdep.h> + +#ifdef __ASSEMBLER__ + +/* Syntactic details of assembler. */ + +/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */ +#define ALIGNARG(log2) 1<<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(4); \ + C_LABEL(name) \ + cfi_startproc; \ + CALL_MCOUNT + +#undef END +#define END(name) \ + cfi_endproc; \ + ASM_SIZE_DIRECTIVE(name) + +#define ENTRY_CHK(name) ENTRY (name) +#define END_CHK(name) END (name) + +/* 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 + +#undef PSEUDO_END +#define PSEUDO_END(name) \ + END (name) + +/* Local label name for asm code. */ +#ifndef L +/* ELF-like local names start with `.L'. */ +# define L(name) .L##name +#endif + +#define atom_text_section .section ".text.atom", "ax" + +#endif /* __ASSEMBLER__ */ + +#endif /* _X86_SYSDEP_H */ |