glibc/sysdeps/i386/i386-mcount.S
Adhemerval Zanella 25f1e16ef0 i386: Remove CET support
CET is only support for x86_64, this patch reverts:

  - faaee1f07e x86: Support shadow stack pointer in setjmp/longjmp.
  - be9ccd27c0 i386: Add _CET_ENDBR to indirect jump targets in
    add_n.S/sub_n.S
  - c02695d776 x86/CET: Update vfork to prevent child return
  - 5d844e1b72 i386: Enable CET support in ucontext functions
  - 124bcde683 x86: Add _CET_ENDBR to functions in crti.S
  - 562837c002 x86: Add _CET_ENDBR to functions in dl-tlsdesc.S
  - f753fa7dea x86: Support IBT and SHSTK in Intel CET [BZ #21598]
  - 825b58f3fb i386-mcount.S: Add _CET_ENDBR to _mcount and __fentry__
  - 7e119cd582 i386: Use _CET_NOTRACK in i686/memcmp.S
  - 177824e232 i386: Use _CET_NOTRACK in memcmp-sse4.S
  - 0a899af097 i386: Use _CET_NOTRACK in memcpy-ssse3-rep.S
  - 7fb613361c i386: Use _CET_NOTRACK in memcpy-ssse3.S
  - 77a8ae0948 i386: Use _CET_NOTRACK in memset-sse2-rep.S
  - 00e7b76a8f i386: Use _CET_NOTRACK in memset-sse2.S
  - 90d15dc577 i386: Use _CET_NOTRACK in strcat-sse2.S
  - f1574581c7 i386: Use _CET_NOTRACK in strcpy-sse2.S
  - 4031d7484a i386/sub_n.S: Add a missing _CET_ENDBR to indirect jump
  - target
  -
Checked on i686-linux-gnu.
2024-01-09 13:55:51 -03:00

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__))