diff options
Diffstat (limited to 'src/setjmp/x86_64/setjmp.s')
| -rw-r--r-- | src/setjmp/x86_64/setjmp.s | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/setjmp/x86_64/setjmp.s b/src/setjmp/x86_64/setjmp.s new file mode 100644 index 00000000..8f29fa81 --- /dev/null +++ b/src/setjmp/x86_64/setjmp.s @@ -0,0 +1,25 @@ +/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */ +.global __setjmp +.global _setjmp +.global setjmp +.type __setjmp,%function +.type _setjmp,%function +.type setjmp,%function +__setjmp: +_setjmp: +setjmp: + mov %rbx,(%rdi) /* rdi is jmp_buf, move registers onto it */ + mov %rbp,8(%rdi) + mov %r12,16(%rdi) + mov %r13,24(%rdi) + mov %r14,32(%rdi) + mov %r15,40(%rdi) + leaq 8(%rsp),%rdx /* this is our rsp WITHOUT current ret addr */ + mov %rdx,48(%rdi) + movq (%rsp),%rdx /* save return addr ptr for new rip */ + mov %rdx,56(%rdi) + xor %rax,%rax /* always return 0 */ + ret +.size __setjmp,.-__setjmp +.size _setjmp,.-_setjmp +.size setjmp,.-setjmp |