-/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */
.global _longjmp
.global longjmp
-.type _longjmp,%function
-.type longjmp,%function
+.type _longjmp,@function
+.type longjmp,@function
_longjmp:
longjmp:
mov %rsi,%rax /* val will be longjmp return */
test %rax,%rax
- jnz .L0
+ jnz 1f
inc %rax /* if val==0, val=1 per longjmp semantics */
-.L0:
- movq (%rdi),%rbx /* rdi is the jmp_buf, restore regs from it */
- movq 8(%rdi),%rbp
- movq 16(%rdi),%r12
- movq 24(%rdi),%r13
- movq 32(%rdi),%r14
- movq 40(%rdi),%r15
- movq 48(%rdi),%rdx /* this ends up being the stack pointer */
+1:
+ mov (%rdi),%rbx /* rdi is the jmp_buf, restore regs from it */
+ mov 8(%rdi),%rbp
+ mov 16(%rdi),%r12
+ mov 24(%rdi),%r13
+ mov 32(%rdi),%r14
+ mov 40(%rdi),%r15
+ mov 48(%rdi),%rdx /* this ends up being the stack pointer */
mov %rdx,%rsp
- movq 56(%rdi),%rdx /* this is the instruction pointer */
+ mov 56(%rdi),%rdx /* this is the instruction pointer */
jmp *%rdx /* goto saved address without altering rsp */
-.size _longjmp,.-_longjmp
-.size longjmp,.-longjmp