mirror of
https://github.com/isfshax/isfshax.git
synced 2024-06-01 09:28:45 +02:00
73 lines
1.6 KiB
ArmAsm
73 lines
1.6 KiB
ArmAsm
/*
|
|
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
|
|
|
|
ELF loader: system startup
|
|
|
|
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, version 2.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
*/
|
|
.arm
|
|
|
|
.extern _main
|
|
.extern __got_start
|
|
.extern __got_end
|
|
.extern __stack_addr
|
|
.extern delay
|
|
.globl _start
|
|
|
|
.section .init
|
|
|
|
_start:
|
|
@ Get real address of _start
|
|
sub r4, pc, #8
|
|
@ Subtract offset to get the address that we were loaded at
|
|
ldr r0, =_start
|
|
sub r4, r4, r0
|
|
|
|
@ Set up a stack
|
|
ldr sp, =__stack_addr
|
|
add sp, r4
|
|
|
|
@ relocate the GOT entries
|
|
ldr r1, =__got_start
|
|
add r1, r4
|
|
ldr r2, =__got_end
|
|
add r2, r4
|
|
got_loop:
|
|
@ check for the end
|
|
cmp r1, r2
|
|
beq done_got
|
|
@ read the GOT entry
|
|
ldr r3, [r1]
|
|
@ add our base address
|
|
add r3, r4
|
|
str r3, [r1]
|
|
@ move on
|
|
add r1, r1, #4
|
|
b got_loop
|
|
|
|
done_got:
|
|
|
|
@ take the plunge
|
|
mov r0, r4
|
|
bl _main
|
|
@ _main returned! Go to whatever address it returned...
|
|
mov r1, r0
|
|
mov r0, r4
|
|
mov pc, r1
|
|
|
|
.pool
|