v/vlib/os/bare/bare.S

29 lines
584 B
ArmAsm

.intel_syntax noprefix
.text
.globl _start, syscall5
_start:
xor rbp,rbp
pop rdi
mov rsi,rsp
and rsp,-16
call main__main
mov rdi,rax /* syscall param 1 = rax (ret value of main) */
mov rax,60 /* SYS_exit */
syscall
ret /* should never be reached, but if the OS somehow fails
to kill us, it will cause a segmentation fault */
syscall5:
mov rax,rdi
mov rdi,rsi
mov rsi,rdx
mov rdx,rcx
mov r10,r8
mov r8,r9
syscall
ret