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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.
68 lines
2.1 KiB
ArmAsm
68 lines
2.1 KiB
ArmAsm
/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 version.
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Copyright (C) 1994-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This just does a tail-call to `__sigsetjmp (ARG, 1)'.
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We cannot do it in C because it must be a tail-call, so frame-unwinding
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in setjmp doesn't clobber the state restored by longjmp. */
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#include <sysdep.h>
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#include <pointer_guard.h>
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#include <jmpbuf-offsets.h>
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#include <stap-probe.h>
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#define PARMS 4 /* no space for saved regs */
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#define JMPBUF PARMS
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#define SIGMSK JMPBUF+4
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ENTRY (setjmp)
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/* Note that we have to use a non-exported symbol in the next
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jump since otherwise gas will emit it as a jump through the
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PLT which is what we cannot use here. */
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movl JMPBUF(%esp), %eax
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/* Save registers. */
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movl %ebx, (JB_BX*4)(%eax)
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movl %esi, (JB_SI*4)(%eax)
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movl %edi, (JB_DI*4)(%eax)
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leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */
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#ifdef PTR_MANGLE
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PTR_MANGLE (%ecx)
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#endif
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movl %ecx, (JB_SP*4)(%eax)
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movl 0(%esp), %ecx /* Save PC we are returning to now. */
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LIBC_PROBE (setjmp, 3, 4@%eax, -4@$1, 4@%ecx)
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#ifdef PTR_MANGLE
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PTR_MANGLE (%ecx)
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#endif
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movl %ecx, (JB_PC*4)(%eax)
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movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */
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/* Call __sigjmp_save. */
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pushl $1
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cfi_adjust_cfa_offset (4)
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pushl 8(%esp)
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cfi_adjust_cfa_offset (4)
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call __sigjmp_save
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popl %ecx
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cfi_adjust_cfa_offset (-4)
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popl %edx
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cfi_adjust_cfa_offset (-4)
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ret
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END (setjmp)
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