about summary refs log tree commit diff
path: root/src/setjmp/x32/setjmp.s
diff options
context:
space:
mode:
authorrofl0r <retnyg@gmx.net>2014-01-07 22:43:34 +0100
committerrofl0r <retnyg@gmx.net>2014-02-23 11:07:18 +0100
commit323272db175204b951f119dae4bd99ef05e20f13 (patch)
tree70329156d5189294b1e9e7f9c7c326924ad62e35 /src/setjmp/x32/setjmp.s
parent0f169cbb79c39a5b15f7a27d9283cdeb6e122b8f (diff)
downloadmusl-323272db175204b951f119dae4bd99ef05e20f13.tar.gz
musl-323272db175204b951f119dae4bd99ef05e20f13.tar.xz
musl-323272db175204b951f119dae4bd99ef05e20f13.zip
import vanilla x86_64 code as x32
Diffstat (limited to 'src/setjmp/x32/setjmp.s')
-rw-r--r--src/setjmp/x32/setjmp.s22
1 files changed, 22 insertions, 0 deletions
diff --git a/src/setjmp/x32/setjmp.s b/src/setjmp/x32/setjmp.s
new file mode 100644
index 00000000..98f58b8d
--- /dev/null
+++ b/src/setjmp/x32/setjmp.s
@@ -0,0 +1,22 @@
+/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */
+.global __setjmp
+.global _setjmp
+.global setjmp
+.type __setjmp,@function
+.type _setjmp,@function
+.type setjmp,@function
+__setjmp:
+_setjmp:
+setjmp:
+	mov %rbx,(%rdi)         /* rdi is jmp_buf, move registers onto it */
+	mov %rbp,8(%rdi)
+	mov %r12,16(%rdi)
+	mov %r13,24(%rdi)
+	mov %r14,32(%rdi)
+	mov %r15,40(%rdi)
+	lea 8(%rsp),%rdx        /* this is our rsp WITHOUT current ret addr */
+	mov %rdx,48(%rdi)
+	mov (%rsp),%rdx         /* save return addr ptr for new rip */
+	mov %rdx,56(%rdi)
+	xor %rax,%rax           /* always return 0 */
+	ret