elf.h: add ELFCOMPRESS_ZSTD

[musl] / src / setjmp / x86_64 / longjmp.s

diff --git a/src/setjmp/x86_64/longjmp.s b/src/setjmp/x86_64/longjmp.s
index c63b0c9..1b2661c 100644 (file)
--- a/src/setjmp/x86_64/longjmp.s
+++ b/src/setjmp/x86_64/longjmp.s
@@ -1,24 +1,18 @@
-/* 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
-       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 */
-       mov %rdx,%rsp
-       movq 56(%rdi),%rdx      /* this is the instruction pointer */
-       jmp *%rdx               /* goto saved address without altering rsp */
-.size _longjmp,.-_longjmp
-.size longjmp,.-longjmp
+       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),%rsp
+       jmp *56(%rdi)           /* goto saved address without altering rsp */