diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S b/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S deleted file mode 100644 index 2955c56a56..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S +++ /dev/null @@ -1,131 +0,0 @@ -/* Copyright (C) 2001-2017 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> - -#include <sigaltstack-offsets.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 - - -//#define __longjmp ____longjmp_chk - -#ifdef PIC -# define CALL_FAIL sub $8, %RSP_LP; \ - cfi_remember_state; \ - cfi_def_cfa_offset(16); \ - lea longjmp_msg(%rip), %RDI_LP; \ - call HIDDEN_JUMPTARGET(__fortify_fail); \ - nop; \ - cfi_restore_state -#else -# define CALL_FAIL sub $8, %RSP_LP; \ - cfi_remember_state; \ - cfi_def_cfa_offset(16); \ - mov $longjmp_msg, %RDI_LP; \ - call HIDDEN_JUMPTARGET(__fortify_fail); \ - nop; \ - cfi_restore_state -#endif - -/* Jump to the position specified by ENV, causing the - setjmp call there to return VAL, or 1 if VAL is 0. - void __longjmp (__jmp_buf env, int val). */ - .text -ENTRY(____longjmp_chk) - /* Restore registers. */ - mov (JB_RSP*8)(%rdi), %R8_LP - mov (JB_RBP*8)(%rdi),%R9_LP - mov (JB_PC*8)(%rdi), %RDX_LP -#ifdef PTR_DEMANGLE - PTR_DEMANGLE (%R8_LP) - PTR_DEMANGLE (%R9_LP) - PTR_DEMANGLE (%RDX_LP) -# ifdef __ILP32__ - /* We ignored the high bits of the %rbp value because only the low - bits are mangled. But we cannot presume that %rbp is being used - as a pointer and truncate it, so recover the high bits. */ - movl (JB_RBP*8 + 4)(%rdi), %eax - shlq $32, %rax - orq %rax, %r9 -# endif -#endif - - cmp %R8_LP, %RSP_LP - jbe .Lok - - /* Save function parameters. */ - movq %rdi, %r10 - cfi_register (%rdi, %r10) - movl %esi, %ebx - cfi_register (%rsi, %rbx) - - xorl %edi, %edi - lea -sizeSS(%rsp), %RSI_LP - movl $__NR_sigaltstack, %eax - syscall - /* Without working sigaltstack we cannot perform the test. */ - testl %eax, %eax - jne .Lok2 - testl $1, (-sizeSS + oSS_FLAGS)(%rsp) - jz .Lfail - - mov (-sizeSS + oSS_SP)(%rsp), %RAX_LP - add (-sizeSS + oSS_SIZE)(%rsp), %RAX_LP - sub %R8_LP, %RAX_LP - cmp (-sizeSS + oSS_SIZE)(%rsp), %RAX_LP - jae .Lok2 - -.Lfail: CALL_FAIL - -.Lok2: movq %r10, %rdi - cfi_restore (%rdi) - movl %ebx, %esi - cfi_restore (%rsi) - -.Lok: - LIBC_PROBE (longjmp, 3, LP_SIZE@%RDI_LP, -4@%esi, LP_SIZE@%RDX_LP) - /* We add unwind information for the target here. */ - cfi_def_cfa(%rdi, 0) - cfi_register(%rsp,%r8) - cfi_register(%rbp,%r9) - cfi_register(%rip,%rdx) - cfi_offset(%rbx,JB_RBX*8) - cfi_offset(%r12,JB_R12*8) - cfi_offset(%r13,JB_R13*8) - cfi_offset(%r14,JB_R14*8) - cfi_offset(%r15,JB_R15*8) - movq (JB_RBX*8)(%rdi), %rbx - movq (JB_R12*8)(%rdi), %r12 - movq (JB_R13*8)(%rdi), %r13 - movq (JB_R14*8)(%rdi), %r14 - movq (JB_R15*8)(%rdi), %r15 - /* Set return value for setjmp. */ - movl %esi, %eax - mov %R8_LP, %RSP_LP - movq %r9,%rbp - LIBC_PROBE (longjmp_target, 3, - LP_SIZE@%RDI_LP, -4@%eax, LP_SIZE@%RDX_LP) - jmpq *%rdx -END (____longjmp_chk) |