构建 Arm64 汇编
Table of Contents
1. 安装交叉编译的工具链
# 交叉编译器 sudo apt install gcc-aarch64-linux-gnu # Qemu 用户态模拟器 sudo apt install qemu-user
2. 编写 hello world 代码
新建 hello.S 并写入以下代码
.data /* Data segment: define our message string and calculate its length. */ msg: .ascii "Hello, ARM64!\n" len = . - msg .text /* Our application's entry point. */ .globl _start _start: /* syscall write(int fd, const void *buf, size_t count) */ mov x0, #1 /* fd := STDOUT_FILENO */ ldr x1, =msg /* buf := msg */ ldr x2, =len /* count := len */ mov w8, #64 /* write is syscall #64 */ svc #0 /* invoke syscall */ /* syscall exit(int status) */ mov x0, #0 /* status := 0 */ mov w8, #93 /* exit is syscall #93 */ svc #0 /* invoke syscall */
3. 编译代码
aarch64-linux-gnu-as -o hello.o hello.S aarch64-linux-gnu-ld -s -o hello hello.o
4. 运行代码
$ qemu-aarch64 ./hello Hello, ARM64! $