code.flowtr.dev/mirrors/u-root@v1.0.0/pkg/bzimage/testdata/init.S (about)

     1  #include <x86_64-linux-gnu/asm/unistd_64.h>
     2  1:
     3  	.string	"------------------------------------------ hi from bzimage test ---------------------\n"
     4  .globl _start
     5  _start:
     6  	movl	$70, %edx
     7  	movq	$1b, %rsi
     8  	movl	$1, %edi
     9  	movl	$__NR_write, %eax 
    10  	syscall
    11  1:	jmp 1b