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____longjmp_chk is now OS-specific.
We use sigaltstack internally which on some systems is a syscall and should be used as such. Move the x86-64 version to the Linux specific directory and create in its place a file which always causes compile errors.
This commit is contained in:
Ulrich Drepper
parent
8e80581787
commit
98b1e6c866
@ -1,5 +1,10 @@
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2009-07-30 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S: New file. Content
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comes from...
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* sysdeps/x86_64/____longjmp_chk.S: ...here. This is now a file
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which always causes a compile error.
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* debug/Makefile (tests): Add tst-longjmp_chk2.
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* debug/tst-longjmp_chk2.c: New file.
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145
sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S
Normal file
145
sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S
Normal file
@ -0,0 +1,145 @@
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/* 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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/* Save function parameters. */
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movq %rdi, %r10
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movl %esi, %ecx
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xorl %eax, %eax
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cmpq %r8, %rsp
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jbe .Lok
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subq $24, %rsp
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cfi_adjust_cfa_offset(24)
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xorl %edi, %edi
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movq %rsp, %rsi
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movl $__NR_sigaltstack, %eax
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syscall
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testl %eax, %eax
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movl $0, %eax
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leaq 24(%rsp), %rsp
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cfi_adjust_cfa_offset(-24)
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jne .Lok
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movl 8(%rsp), %eax
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andl $1, %eax
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.Lok:
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/* We add unwind information for the target here. */
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cfi_def_cfa(%r10, 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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xchgq %r8, %rsp
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cfi_restore(%rsp)
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xchgq %r9, %rbp
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cfi_restore(%rbp)
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movq (JB_RBX*8)(%r10),%rbx
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movq (JB_R12*8)(%r10),%r12
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movq (JB_R13*8)(%r10),%r13
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movq (JB_R14*8)(%r10),%r14
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movq (JB_R15*8)(%r10),%r15
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cmpq %rsp, %r8
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jnbe .Lcheck
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/* Set return value for setjmp. */
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.Lout: movl %ecx, %eax
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jmpq *%rdx
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.Lcheck:
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testl %eax, %eax
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je .Lfail
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subq $24, %rsp
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cfi_adjust_cfa_offset(24)
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xorl %edi, %edi
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movq %rsp, %rsi
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movl $__NR_sigaltstack, %eax
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syscall
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addq $24, %rsp
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cfi_adjust_cfa_offset(-24)
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testl $1, 8(%rsp)
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je .Lout
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.Lfail: xchgq %r8, %rsp
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/* We want the stack trace to show that of the caller. */
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cfi_def_cfa(%rsp, 8)
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cfi_restore(%rsp)
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cfi_register(%rbp, %r9)
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cfi_restore(%rip)
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cfi_restore(%rbx)
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cfi_restore(%r12)
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cfi_restore(%r13)
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cfi_restore(%r14)
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cfi_restore(%r15)
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xchgq %r9, %rbp
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cfi_restore(%rbp)
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CALL_FAIL
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hlt
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END (BP_SYM (____longjmp_chk))
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@ -1,145 +1 @@
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/* 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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/* Save function parameters. */
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movq %rdi, %r10
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movl %esi, %ecx
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xorl %eax, %eax
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cmpq %r8, %rsp
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jbe .Lok
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subq $24, %rsp
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cfi_adjust_cfa_offset(24)
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xorl %edi, %edi
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movq %rsp, %rsi
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movl $__NR_sigaltstack, %eax
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syscall
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testl %eax, %eax
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movl $0, %eax
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leaq 24(%rsp), %rsp
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cfi_adjust_cfa_offset(-24)
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jne .Lok
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movl 8(%rsp), %eax
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andl $1, %eax
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.Lok:
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/* We add unwind information for the target here. */
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cfi_def_cfa(%r10, 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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xchgq %r8, %rsp
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cfi_restore(%rsp)
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xchgq %r9, %rbp
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cfi_restore(%rbp)
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movq (JB_RBX*8)(%r10),%rbx
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movq (JB_R12*8)(%r10),%r12
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movq (JB_R13*8)(%r10),%r13
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movq (JB_R14*8)(%r10),%r14
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movq (JB_R15*8)(%r10),%r15
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cmpq %rsp, %r8
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jnbe .Lcheck
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/* Set return value for setjmp. */
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.Lout: movl %ecx, %eax
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jmpq *%rdx
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.Lcheck:
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testl %eax, %eax
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je .Lfail
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subq $24, %rsp
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cfi_adjust_cfa_offset(24)
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xorl %edi, %edi
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movq %rsp, %rsi
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movl $__NR_sigaltstack, %eax
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syscall
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addq $24, %rsp
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cfi_adjust_cfa_offset(-24)
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testl $1, 8(%rsp)
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je .Lout
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.Lfail: xchgq %r8, %rsp
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/* We want the stack trace to show that of the caller. */
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cfi_def_cfa(%rsp, 8)
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cfi_restore(%rsp)
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cfi_register(%rbp, %r9)
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cfi_restore(%rip)
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cfi_restore(%rbx)
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cfi_restore(%r12)
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cfi_restore(%r13)
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cfi_restore(%r14)
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cfi_restore(%r15)
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xchgq %r9, %rbp
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cfi_restore(%rbp)
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CALL_FAIL
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hlt
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END (BP_SYM (____longjmp_chk))
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#error "OS-specific version needed"
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