ARM64汇编打印hello

不用链接C库的裸程序，向标准输出打印hello并调用exit退出：

.section .rodata

hellostr:
.ascii "hello\n"


.section .text
.global _start

_start:
        mov x0, #1
        ldr x1, =hellostr
        mov x2, #6
        mov x8, #64  //syscall write
        svc #0


        mov x0, #0
        mov x8, #93  //syscall exit
        svc #0

all:
        as main.s -o main.o
        ld main.o -o a.out
        rm main.o

---

链接C库，调用printf打印hello并退出：

.section .rodata

hellostr:
.ascii "hello\n"


.section .text
.global _start

_start:
        ldr x0, =hellostr
        bl printf

        mov x0, #0
        bl exit

all:
        as main.s -o main.o
        ld -dynamic-linker /lib/ld-linux-aarch64.so.1 -lc  main.o -o a.out
        rm main.o

$ ldd a.out
        linux-vdso.so.1 (0x0000007fa9beb000)
        libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0