segmentation fault at every assembly code

Question

I\'am trying to learn assemly on raspberry pi.But I couldn\'t get started, every code i write gets \"Segmentation Fault\".

.text
.global _start
_start:
   MOV R0         


        

Answer 1

In the EABI that the Raspberry Pi uses, SWI 0 is just the system call entry. You still need to specify which function you want using r7. So, something like this should work:

.text
.global _start
_start:
   MOV R0, #2
   MOV R7, #1 ; sys_exit
   SWI 0