| 1 | /* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */ |
| 2 | .global _longjmp |
| 3 | .global longjmp |
| 4 | .type _longjmp,@function |
| 5 | .type longjmp,@function |
| 6 | _longjmp: |
| 7 | longjmp: |
| 8 | xor %eax,%eax |
| 9 | cmp $1,%esi /* CF = val ? 0 : 1 */ |
| 10 | adc %esi,%eax /* eax = val + !val */ |
| 11 | mov (%rdi),%rbx /* rdi is the jmp_buf, restore regs from it */ |
| 12 | mov 8(%rdi),%rbp |
| 13 | mov 16(%rdi),%r12 |
| 14 | mov 24(%rdi),%r13 |
| 15 | mov 32(%rdi),%r14 |
| 16 | mov 40(%rdi),%r15 |
| 17 | mov 48(%rdi),%rsp |
| 18 | jmp *56(%rdi) /* goto saved address without altering rsp */ |