From: yu.dongliang <18588496441@163.com>
Date: Sat, 13 Dec 2025 13:52:25 +0000 (+0800)
Subject: asm.s
X-Git-Url: http://baseworks.info/?a=commitdiff_plain;h=f706e3692dda6ce2b605b67b41807887404953cb;p=asm_demo.git

asm.s
---

diff --git a/asm.s b/asm.s
index e92ef74..ecebc71 100644
--- a/asm.s
+++ b/asm.s
@@ -7,7 +7,7 @@ asm_main:
 #rsi = argv
 #rdx = envp
 	cmp $2, %rdi
-	jl  5f
+	jl  _print_usage
 
 	mov 8(%rsi), %rdi
 0:
@@ -55,3 +55,12 @@ asm_main:
 	jmp 0b
 6:
 	ret
+_print_usage:
+	push %rdi
+	leaq usage, %rdi
+	mov  $0, %eax
+	call printf
+	pop  %rdi
+	ret
+.data
+usage: .asciz "./a.out asm_code\n"