Index: fusl/src/setjmp/x32/longjmp.s |
diff --git a/fusl/src/setjmp/x32/longjmp.s b/fusl/src/setjmp/x32/longjmp.s |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e175a4b9606bba41eccc8972c22244e533718f0a |
--- /dev/null |
+++ b/fusl/src/setjmp/x32/longjmp.s |
@@ -0,0 +1,22 @@ |
+/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */ |
+.global _longjmp |
+.global longjmp |
+.type _longjmp,@function |
+.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: |
+ 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 */ |