问题
I am new to GNU Assembler and I'm trying to execute this piece of code:
.globl _main
_main:
movl $1, %eax
movl $0, %ebx
int $0x80
This programm should exit by the system call exit (1). Compiled it (no warnings):
gcc test.s
But running it gives me the error: Illegal instruction: 4
Thanks for help!
回答1:
If you're compiling a 64-bit executable, then you should write something like this:
movq $0x2000001, %rax
movq $0, %rdi
syscall
Source.
来源：https://stackoverflow.com/questions/11178313/gnu-assembler-mac-os-x-64-bit-illegal-instruction-4