diff options
Diffstat (limited to 'src/setjmp/x32/longjmp.s')
| -rw-r--r-- | src/setjmp/x32/longjmp.s | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/src/setjmp/x32/longjmp.s b/src/setjmp/x32/longjmp.s index e175a4b9..1b2661c3 100644 --- a/src/setjmp/x32/longjmp.s +++ b/src/setjmp/x32/longjmp.s @@ -5,18 +5,14 @@ .type longjmp,@function _longjmp: longjmp: - mov %rsi,%rax /* val will be longjmp return */ - test %rax,%rax - jnz 1f - inc %rax /* if val==0, val=1 per longjmp semantics */ -1: + xor %eax,%eax + cmp $1,%esi /* CF = val ? 0 : 1 */ + adc %esi,%eax /* eax = val + !val */ 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 */ + mov 48(%rdi),%rsp + jmp *56(%rdi) /* goto saved address without altering rsp */ |