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110 lines
2.8 KiB
ArmAsm
110 lines
2.8 KiB
ArmAsm
/* Copyright (C) 2001,2004,2005,2006,2009 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep.h>
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#include <jmpbuf-offsets.h>
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#include <asm-syntax.h>
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.section .rodata.str1.1,"aMS",@progbits,1
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.type longjmp_msg,@object
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longjmp_msg:
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.string "longjmp causes uninitialized stack frame"
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.size longjmp_msg, .-longjmp_msg
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//#define __longjmp ____longjmp_chk
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#ifdef PIC
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# define CALL_FAIL leaq longjmp_msg(%rip), %rdi; \
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call __GI___fortify_fail
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#else
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# define CALL_FAIL movq $longjmp_msg, %rdi; \
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call __fortify_fail
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#endif
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#define CHECK_RSP(reg) \
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cmpq reg, %rsp; \
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jbe .Lok; \
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CALL_FAIL; \
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.Lok:
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/* Jump to the position specified by ENV, causing the
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setjmp call there to return VAL, or 1 if VAL is 0.
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void __longjmp (__jmp_buf env, int val). */
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.text
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ENTRY(____longjmp_chk)
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/* Restore registers. */
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movq (JB_RSP*8)(%rdi),%r8
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movq (JB_RBP*8)(%rdi),%r9
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movq (JB_PC*8)(%rdi),%rdx
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#ifdef PTR_DEMANGLE
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PTR_DEMANGLE (%r8)
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PTR_DEMANGLE (%r9)
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PTR_DEMANGLE (%rdx)
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#endif
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cmpq %r8, %rsp
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jbe .Lok
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/* Save function parameters. */
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movq %rdi, %r10
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movl %esi, %ecx
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xorl %edi, %edi
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leaq -24(%rsp), %rsi
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movl $__NR_sigaltstack, %eax
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syscall
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/* Without working sigaltstack we cannot perform the test. */
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testl %eax, %eax
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jne .Lok2
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testl $1, -16(%rsp)
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jz .Lfail
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movq -24(%rsp), %rax
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addq -8(%rsp), %rax
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subq %r8, %rax
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cmpq -8(%rsp), %rax
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jae .Lok2
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.Lfail: CALL_FAIL
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.Lok2: movq %r10, %rdi
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movl %ecx, %esi
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.Lok: /* We add unwind information for the target here. */
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cfi_def_cfa(%rdi, 0)
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cfi_register(%rsp,%r8)
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cfi_register(%rbp,%r9)
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cfi_register(%rip,%rdx)
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cfi_offset(%rbx,JB_RBX*8)
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cfi_offset(%r12,JB_R12*8)
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cfi_offset(%r13,JB_R13*8)
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cfi_offset(%r14,JB_R14*8)
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cfi_offset(%r15,JB_R15*8)
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movq (JB_RBX*8)(%rdi),%rbx
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movq (JB_R12*8)(%rdi),%r12
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movq (JB_R13*8)(%rdi),%r13
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movq (JB_R14*8)(%rdi),%r14
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movq (JB_R15*8)(%rdi),%r15
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/* Set return value for setjmp. */
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movl %esi, %eax
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movq %r8,%rsp
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movq %r9,%rbp
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jmpq *%rdx
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END (____longjmp_chk)
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