| /* setjmp for x86-64. |
| Copyright (C) 2001-2014 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 defined NOT_IN_libc && defined 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. */ |
| # ifdef PIC |
| jmp C_SYMBOL_NAME (__sigjmp_save)@PLT |
| # else |
| jmp __sigjmp_save |
| # endif |
| #endif |
| END (__sigsetjmp) |
| hidden_def (__sigsetjmp) |
