push and pop

src/arch/x86_64/test/bin.rs

@@ -22,6 +22,8 @@ pub fn run() {
     })]);
     let entry = program.func([BInstr::Asm(Asm {
         instrs: vec![
+            mov(di, 39),
+            push(rdi),
             mov(ax, 1),
             mov(di, 1),
             lea(rsi, text_sym),
@@ -29,7 +31,7 @@ pub fn run() {
             Instr::Syscall,
             Instr::Call(hello2),
             mov(ax, 0x3c),
-            mov(di, 39),
+            pop(rdi),
             Instr::Syscall,
         ],
     })]);