longjmp.s raw

   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 */
  19