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Unified Diff: fusl/src/setjmp/x86_64/setjmp.s

Issue 1573973002: Add a "fork" of musl as //fusl. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: fusl/src/setjmp/x86_64/setjmp.s
diff --git a/fusl/src/setjmp/x86_64/setjmp.s b/fusl/src/setjmp/x86_64/setjmp.s
new file mode 100644
index 0000000000000000000000000000000000000000..98f58b8d6551e391f426fc53c81678a03ac89074
--- /dev/null
+++ b/fusl/src/setjmp/x86_64/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
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