diff options
Diffstat (limited to 'REORG.TODO/sysdeps/x86_64/setjmp.S')
| -rw-r--r-- | REORG.TODO/sysdeps/x86_64/setjmp.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/x86_64/setjmp.S b/REORG.TODO/sysdeps/x86_64/setjmp.S new file mode 100644 index 0000000000..3a889033cd --- /dev/null +++ b/REORG.TODO/sysdeps/x86_64/setjmp.S @@ -0,0 +1,66 @@ +/* setjmp for x86-64. + 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> + +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) |