mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 04:01:10 +00:00
110 lines
2.8 KiB
ArmAsm
110 lines
2.8 KiB
ArmAsm
/* Copyright (C) 2001-2015 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/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <jmpbuf-offsets.h>
|
|
#include <asm-syntax.h>
|
|
#include <stap-probe.h>
|
|
|
|
|
|
.section .rodata.str1.1,"aMS",@progbits,1
|
|
.type longjmp_msg,@object
|
|
longjmp_msg:
|
|
.string "longjmp causes uninitialized stack frame"
|
|
.size longjmp_msg, .-longjmp_msg
|
|
|
|
|
|
#ifdef PIC
|
|
# define CALL_FAIL movl %ebx, %ecx; \
|
|
cfi_register(%ebx,%ecx); \
|
|
LOAD_PIC_REG (bx); \
|
|
leal longjmp_msg@GOTOFF(%ebx), %eax; \
|
|
call HIDDEN_JUMPTARGET(__fortify_fail)
|
|
#else
|
|
# define CALL_FAIL movl $longjmp_msg, %eax; \
|
|
call HIDDEN_JUMPTARGET(__fortify_fail)
|
|
#endif
|
|
|
|
|
|
.text
|
|
ENTRY (____longjmp_chk)
|
|
movl 4(%esp), %ecx /* User's jmp_buf in %ecx. */
|
|
|
|
/* Save the return address now. */
|
|
movl (JB_PC*4)(%ecx), %edx
|
|
/* Get the stack pointer. */
|
|
movl (JB_SP*4)(%ecx), %edi
|
|
cfi_undefined(%edi)
|
|
PTR_DEMANGLE (%edx)
|
|
PTR_DEMANGLE (%edi)
|
|
|
|
cmpl %edi, %esp
|
|
jbe .Lok
|
|
|
|
subl $12, %esp
|
|
cfi_adjust_cfa_offset(12)
|
|
xorl %ebx, %ebx
|
|
movl %esp, %ecx
|
|
movl $__NR_sigaltstack, %eax
|
|
ENTER_KERNEL
|
|
/* Without working sigaltstack we cannot perform the test. */
|
|
test %eax, %eax
|
|
jne .Lok2
|
|
testl $1, 4(%esp)
|
|
jz .Lfail
|
|
|
|
movl (%esp), %eax
|
|
addl 8(%esp), %eax
|
|
subl %edi, %eax
|
|
cmpl 8(%esp), %eax
|
|
jae .Lok2
|
|
|
|
.Lfail: CALL_FAIL
|
|
|
|
.Lok2: addl $12, %esp
|
|
cfi_adjust_cfa_offset(-12)
|
|
movl 4(%esp), %ecx
|
|
|
|
.Lok:
|
|
LIBC_PROBE (longjmp, 3, 4@%ecx, -4@8(%esp), 4@%edx)
|
|
/* We add unwind information for the target here. */
|
|
cfi_def_cfa(%ecx, 0)
|
|
cfi_register(%eip, %edx)
|
|
cfi_register(%esp, %edi)
|
|
cfi_offset(%ebx, JB_BX*4)
|
|
cfi_offset(%esi, JB_SI*4)
|
|
cfi_offset(%edi, JB_DI*4)
|
|
cfi_offset(%ebp, JB_BP*4)
|
|
|
|
movl 8(%esp), %eax /* Second argument is return value. */
|
|
movl %edi, %esp
|
|
|
|
/* 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
|
|
cfi_restore(%ebx)
|
|
cfi_restore(%esi)
|
|
cfi_restore(%edi)
|
|
cfi_restore(%ebp)
|
|
|
|
/* Jump to saved PC. */
|
|
LIBC_PROBE (longjmp_target, 3, 4@%ecx, -4@%eax, 4@%edx)
|
|
jmp *%edx
|
|
END (____longjmp_chk)
|