Flat Assembler (FASM) >> Assembly (ARM)
hello, world! (swi, oabi)
參考資訊：
1. syscall
2. example
3. helloworld
4. ARM-assembly-hello-world
5. implementation-of-syscall-on-arm-oabi-what-is-svc-0x900071
System Call (OABI)
| 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 |
main.s
format elf executable 3
entry start
segment readable executable
start:
mov r0, 1
mov r1, msg
mov r2, len
swi 0x900004
mov r0, 0
swi 0x900001
segment readable writeable
msg db "hello, world!", 10
len = $ - msg
編譯、執行
$ qemu-i386 /usr/local/bin/fasmarm main.s
$ qemu-arm-static ./main
hello, world!