diff --git a/am/src/nemu/isa/x86/trap.S b/am/src/nemu/isa/x86/trap.S
index fd0b2e4..878d068 100644
--- a/am/src/nemu/isa/x86/trap.S
+++ b/am/src/nemu/isa/x86/trap.S
@@ -1,8 +1,8 @@
-#----|------------entry------------|---usp---|---irq id---|-----handler-----|
-.globl __am_vecsys;    __am_vecsys: pushl $0; pushl $0x80; jmp __am_asm_trap
-.globl __am_vectrap;  __am_vectrap: pushl $0; pushl $0x81; jmp __am_asm_trap
-.globl __am_irq0;        __am_irq0: pushl $0; pushl   $32; jmp __am_asm_trap
-.globl __am_vecnull;  __am_vecnull: pushl $0; pushl   $-1; jmp __am_asm_trap
+#----|------------entry------------|---irq id---|-----handler-----|
+.globl __am_vecsys;    __am_vecsys: pushl $0x80; jmp __am_asm_trap
+.globl __am_vectrap;  __am_vectrap: pushl $0x81; jmp __am_asm_trap
+.globl __am_irq0;        __am_irq0: pushl   $32; jmp __am_asm_trap
+.globl __am_vecnull;  __am_vecnull: pushl   $-1; jmp __am_asm_trap
 
 
 __am_asm_trap: