Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/sysdeps/x86_64/setjmp.S
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
66 lines (60 sloc)
2.06 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* setjmp for x86-64. | |
Copyright (C) 2001-2016 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> | |
ENTRY (__sigsetjmp) | |
/* Save registers. */ | |
movq %rbx, (JB_RBX*8)(%rdi) | |
#ifdef PTR_MANGLE | |
# ifdef __ILP32__ | |
/* Save the high bits of %rbp first, since PTR_MANGLE will | |
only handle the low bits but we cannot presume %rbp is | |
being used as a pointer and truncate it. Here we write all | |
of %rbp, but the low bits will be overwritten below. */ | |
movq %rbp, (JB_RBP*8)(%rdi) | |
# endif | |
mov %RBP_LP, %RAX_LP | |
PTR_MANGLE (%RAX_LP) | |
mov %RAX_LP, (JB_RBP*8)(%rdi) | |
#else | |
movq %rbp, (JB_RBP*8)(%rdi) | |
#endif | |
movq %r12, (JB_R12*8)(%rdi) | |
movq %r13, (JB_R13*8)(%rdi) | |
movq %r14, (JB_R14*8)(%rdi) | |
movq %r15, (JB_R15*8)(%rdi) | |
lea 8(%rsp), %RDX_LP /* Save SP as it will be after we return. */ | |
#ifdef PTR_MANGLE | |
PTR_MANGLE (%RDX_LP) | |
#endif | |
movq %rdx, (JB_RSP*8)(%rdi) | |
mov (%rsp), %RAX_LP /* Save PC we are returning to now. */ | |
LIBC_PROBE (setjmp, 3, LP_SIZE@%RDI_LP, -4@%esi, LP_SIZE@%RAX_LP) | |
#ifdef PTR_MANGLE | |
PTR_MANGLE (%RAX_LP) | |
#endif | |
movq %rax, (JB_PC*8)(%rdi) | |
#if IS_IN (rtld) | |
/* In ld.so we never save the signal mask. */ | |
xorl %eax, %eax | |
retq | |
#else | |
/* Make a tail call to __sigjmp_save; it takes the same args. */ | |
jmp __sigjmp_save | |
#endif | |
END (__sigsetjmp) | |
hidden_def (__sigsetjmp) |