xv6-riscv-kernel/initcode.S

# Initial process execs /init.
# This code runs in user space.

#include "syscall.h"
#include "traps.h"


# exec(init, argv)
.globl start
start:
  mov $init, %rdi
  mov $argv, %rsi
  mov $SYS_exec, %rax  
  syscall

# for(;;) exit();
exit:
  mov $SYS_exit, %rax
  syscall
  jmp exit

# char init[] = "/init\0";
init:
  .string "/init\0"

# char *argv[] = { init, 0 };
.p2align 2
argv:
  .long init
  .long 0