2017-09-15 07:24:53 +00:00
|
|
|
/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */
|
2017-10-07 12:03:44 +00:00
|
|
|
.global musl_longjmp
|
|
|
|
|
.type musl_longjmp,@function
|
|
|
|
|
musl_longjmp:
|
2017-09-15 07:24:53 +00:00
|
|
|
mov %rsi,%rax /* val will be longjmp return */
|
|
|
|
|
test %rax,%rax
|
|
|
|
|
jnz 1f
|
|
|
|
|
inc %rax /* if val==0, val=1 per longjmp semantics */
|
|
|
|
|
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
|
|
|
|
|
mov 56(%rdi),%rdx /* this is the instruction pointer */
|
|
|
|
|
jmp *%rdx /* goto saved address without altering rsp */
|
