mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 19:00:09 +00:00
25f1e16ef0
CET is only support for x86_64, this patch reverts: -faaee1f07ex86: Support shadow stack pointer in setjmp/longjmp. -be9ccd27c0i386: Add _CET_ENDBR to indirect jump targets in add_n.S/sub_n.S -c02695d776x86/CET: Update vfork to prevent child return -5d844e1b72i386: Enable CET support in ucontext functions -124bcde683x86: Add _CET_ENDBR to functions in crti.S -562837c002x86: Add _CET_ENDBR to functions in dl-tlsdesc.S -f753fa7deax86: Support IBT and SHSTK in Intel CET [BZ #21598] -825b58f3fbi386-mcount.S: Add _CET_ENDBR to _mcount and __fentry__ -7e119cd582i386: Use _CET_NOTRACK in i686/memcmp.S -177824e232i386: Use _CET_NOTRACK in memcmp-sse4.S -0a899af097i386: Use _CET_NOTRACK in memcpy-ssse3-rep.S -7fb613361ci386: Use _CET_NOTRACK in memcpy-ssse3.S -77a8ae0948i386: Use _CET_NOTRACK in memset-sse2-rep.S -00e7b76a8fi386: Use _CET_NOTRACK in memset-sse2.S -90d15dc577i386: Use _CET_NOTRACK in strcat-sse2.S -f1574581c7i386: Use _CET_NOTRACK in strcpy-sse2.S -4031d7484ai386/sub_n.S: Add a missing _CET_ENDBR to indirect jump - target - Checked on i686-linux-gnu.
79 lines
2.4 KiB
ArmAsm
79 lines
2.4 KiB
ArmAsm
/* i386-specific implementation of profiling support.
|
|
Copyright (C) 1997-2024 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 <sysdep.h>
|
|
|
|
/* We need a special version of the `mcount' function since for ix86 it
|
|
must not clobber any register. This has several reasons:
|
|
- there is a bug in gcc as of version 2.7.2.2 which prohibits the
|
|
use of profiling together with nested functions
|
|
- the ELF `fixup' function uses GCC's regparm feature
|
|
- some (future) systems might want to pass parameters in registers. */
|
|
|
|
.globl C_SYMBOL_NAME(_mcount)
|
|
.type C_SYMBOL_NAME(_mcount), @function
|
|
.align ALIGNARG(4)
|
|
C_LABEL(_mcount)
|
|
/* Save the caller-clobbered registers. */
|
|
pushl %eax
|
|
pushl %ecx
|
|
pushl %edx
|
|
|
|
movl 12(%esp), %edx
|
|
movl 4(%ebp), %eax
|
|
|
|
/* No need to access the PLT or GOT, __mcount_internal is an
|
|
internal function and we can make a relative call. */
|
|
call C_SYMBOL_NAME(__mcount_internal)
|
|
|
|
/* Pop the saved registers. Please note that `mcount' has no
|
|
return value. */
|
|
popl %edx
|
|
popl %ecx
|
|
popl %eax
|
|
ret
|
|
ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(_mcount))
|
|
|
|
#undef mcount
|
|
weak_alias (_mcount, mcount)
|
|
|
|
/* Same as above, but doesn't require a frame pointer */
|
|
.globl C_SYMBOL_NAME(__fentry__)
|
|
.type C_SYMBOL_NAME(__fentry__), @function
|
|
.align ALIGNARG(4)
|
|
C_LABEL(__fentry__)
|
|
/* Save the caller-clobbered registers. */
|
|
pushl %eax
|
|
pushl %ecx
|
|
pushl %edx
|
|
|
|
movl 12(%esp), %edx
|
|
movl 16(%esp), %eax
|
|
|
|
/* No need to access the PLT or GOT, __mcount_internal is an
|
|
internal function and we can make a relative call. */
|
|
call C_SYMBOL_NAME(__mcount_internal)
|
|
|
|
/* Pop the saved registers. Please note that `__fentry__' has no
|
|
return value. */
|
|
popl %edx
|
|
popl %ecx
|
|
popl %eax
|
|
ret
|
|
ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(__fentry__))
|