mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 06:20:06 +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.
74 lines
2.2 KiB
ArmAsm
74 lines
2.2 KiB
ArmAsm
/* longjmp for i386.
|
|
Copyright (C) 1995-2024 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>
|
|
#include <pointer_guard.h>
|
|
#include <jmpbuf-offsets.h>
|
|
#include <asm-syntax.h>
|
|
#include <stap-probe.h>
|
|
|
|
.text
|
|
ENTRY (__longjmp)
|
|
#ifdef PTR_DEMANGLE
|
|
movl 4(%esp), %eax /* User's jmp_buf in %eax. */
|
|
|
|
/* Save the return address now. */
|
|
movl (JB_PC*4)(%eax), %edx
|
|
/* Get the stack pointer. */
|
|
movl (JB_SP*4)(%eax), %ecx
|
|
PTR_DEMANGLE (%edx)
|
|
PTR_DEMANGLE (%ecx)
|
|
LIBC_PROBE (longjmp, 3, 4@%eax, -4@8(%esp), 4@%edx)
|
|
cfi_def_cfa(%eax, 0)
|
|
cfi_register(%eip, %edx)
|
|
cfi_register(%esp, %ecx)
|
|
cfi_offset(%ebx, JB_BX*4)
|
|
cfi_offset(%esi, JB_SI*4)
|
|
cfi_offset(%edi, JB_DI*4)
|
|
cfi_offset(%ebp, JB_BP*4)
|
|
/* Restore registers. */
|
|
movl (JB_BX*4)(%eax), %ebx
|
|
movl (JB_SI*4)(%eax), %esi
|
|
movl (JB_DI*4)(%eax), %edi
|
|
movl (JB_BP*4)(%eax), %ebp
|
|
cfi_restore(%ebx)
|
|
cfi_restore(%esi)
|
|
cfi_restore(%edi)
|
|
cfi_restore(%ebp)
|
|
|
|
LIBC_PROBE (longjmp_target, 3, 4@%eax, -4@8(%esp), 4@%edx)
|
|
movl 8(%esp), %eax /* Second argument is return value. */
|
|
movl %ecx, %esp
|
|
#else
|
|
movl 4(%esp), %ecx /* User's jmp_buf in %ecx. */
|
|
movl 8(%esp), %eax /* Second argument is return value. */
|
|
/* Save the return address now. */
|
|
movl (JB_PC*4)(%ecx), %edx
|
|
LIBC_PROBE (longjmp, 3, 4@%ecx, -4@%eax, 4@%edx)
|
|
/* Restore registers. */
|
|
movl (JB_BX*4)(%ecx), %ebx
|
|
movl (JB_SI*4)(%ecx), %esi
|
|
movl (JB_DI*4)(%ecx), %edi
|
|
movl (JB_BP*4)(%ecx), %ebp
|
|
movl (JB_SP*4)(%ecx), %esp
|
|
LIBC_PROBE (longjmp_target, 3, 4@%ecx, -4@%ecx, 4@%edx)
|
|
#endif
|
|
/* Jump to saved PC. */
|
|
jmp *%edx
|
|
END (__longjmp)
|