From 6c9385dcefb7ec487683757f5de4c168f8c1dbf2 Mon Sep 17 00:00:00 2001
From: yushiuan9499 <yushiuan9499@gmail.com>
Date: Tue, 1 Apr 2025 20:01:51 +0800
Subject: [PATCH] add print.S

---
 print.S | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 print.S

diff --git a/print.S b/print.S
new file mode 100644
index 0000000..660e199
--- /dev/null
+++ b/print.S
@@ -0,0 +1,45 @@
+.intel_syntax noprefix
+.globl _start
+.section .text
+_start:
+	// create some stack memory
+	sub rsp, 1024 // 1KB
+	// stack 
+	// char buffer[256] = [rsp:rsp+256]
+	// open the file in O_RDONLY
+	mov rax, 2 // open
+	lea rdi, [rip+FILE_NAME] // FILE_NAME = "找找自己問題.txt"
+	mov rsi, 0 // O_RDONLY
+	mov rdx, 0 // NULL
+	syscall
+
+	mov r12, rax // store the fd
+
+getline_loop:
+	// read the line
+	mov rax, 0 // read
+	mov rdi, r12 // fd
+	lea rsi, [rsp]  // buffer
+	mov rdx, 256 // read_size = 256
+	syscall
+
+	mov r13, rax // store the read content's size
+
+	// output the file content
+	mov rax, 1 // write
+	mov rdi, 1 // write to std output
+	lea rsi, [rsp] // buffer
+	mov rdx, r13 // write the r13 bytes
+	syscall
+
+	cmp r13, 256 // the size of read content == 256
+	je getline_loop // repeat if true
+
+ 	// exit(0)
+	mov rax, 60
+	mov rdi, 0
+	syscall
+
+.section .data
+FILE_NAME:
+	.string "找找自己問題.txt"