參考資訊:
https://gist.github.com/bellbind/753290
https://syscalls.w3challs.com/?arch=arm_strong
http://kerseykyle.com/articles/ARM-assembly-hello-world
https://github.com/kevinhooke/learning-arm-asm/blob/master/helloworld.s
https://stackoverflow.com/questions/48183434/implementation-of-syscall-on-arm-oabi-what-is-svc-0x900071
main.s
.global _start .data msg: .ascii "hello, world!\n" len = . - msg .text _start: mov r0, #1 ldr r1, =msg ldr r2, =len swi 0x900004 mov r0, #0 swi 0x900001
NR | syscall name | arg0(r0) | arg1(r1) | arg2(r2) |
---|---|---|---|---|
0x900001 | exit | int error_code | ||
0x900004 | write | unsigned int fd | const char *buf | size_t count |
編譯、執行
$ arm-linux-gnueabihf-gcc main.s -o main -nostdlib -static $ qemu-arm ./main hello, world!