tinygo/targets/nintendoswitch.s
Lucas Teske 3650c2c739 nintendoswitch: Add experimental Nintendo Switch support without CRT
Bare minimal nintendo switch support using LLD
2020-07-31 00:58:09 +02:00

51 строка
907 Б
ArmAsm

.section .text.jmp, "x"
.global _start
_start:
b start
.word _mod_header - _start
.section .data.mod0
.word 0, 8
.global _mod_header
_mod_header:
.ascii "MOD0"
.word __dynamic_start - _mod_header
.word __bss_start - _mod_header
.word __bss_end - _mod_header
.word 0, 0 // eh_frame_hdr start/end
.word 0 // runtime-generated module object offset
.section .text, "x"
.global start
start:
// save lr
mov x7, x30
// get aslr base
bl +4
sub x6, x30, #0x88
// context ptr and main thread handle
mov x5, x0
mov x4, x1
// clear .bss
adrp x5, __bss_start
add x5, x5, #:lo12:__bss_start
adrp x6, __bss_end
add x6, x6, #:lo12:__bss_end
bssloop:
cmp x5, x6
b.eq run
str xzr, [x5]
add x5, x5, 8
b bssloop
run:
// call entrypoint
adrp x30, exit
add x30, x30, #:lo12:exit
b main