Squash commits for public release

libs/libc/setjmp/x86_64/setjmp.S

@@ -0,0 +1,35 @@
+[bits 64]
+
+global setjmp
+setjmp:
+    mov [rdi], rbx
+    mov [rdi+8], r12
+    mov [rdi+16], r13
+    mov [rdi+24], r14
+    mov [rdi+32], r15
+    mov [rdi+40], rbp
+    mov [rdi+48], rsp
+
+    mov rax, [rsp]
+    mov [rdi+56], rax
+
+    xor rax, rax
+    ret
+
+global longjmp
+longjmp:
+    mov rbx, [rdi]
+    mov r12, [rdi+8]
+    mov r13, [rdi+16]
+    mov r14, [rdi+24]
+    mov r15, [rdi+32]
+    mov rbp, [rdi+40]
+    mov rsp, [rdi+48]
+    mov rcx, [rdi+56]
+
+    mov rax, rsi
+    test rax, rax
+    jnz success
+    mov rax, 1    
+success:
+    jmp rcx