diff options
Diffstat (limited to 'berry_fix/payload/asm/crt0.s')
| -rw-r--r-- | berry_fix/payload/asm/crt0.s | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/berry_fix/payload/asm/crt0.s b/berry_fix/payload/asm/crt0.s new file mode 100644 index 000000000..872a63018 --- /dev/null +++ b/berry_fix/payload/asm/crt0.s @@ -0,0 +1,82 @@ + .include "asm/macros/function.inc" + .include "constants/gba_constants.inc" + + .syntax unified + + .text + + .arm + .align 2, 0 + .global Init +Init: + mov r0, PSR_IRQ_MODE + msr cpsr_cf, r0 + ldr sp, sp_irq + mov r0, PSR_SYS_MODE + msr cpsr_cf, r0 + ldr sp, sp_sys + ldr r1, =INTR_VECTOR + ldr r0, =IntrMain + str r0, [r1] + ldr r1, =AgbMain + 1 + mov lr, pc + bx r1 + b Init + + .align 2, 0 +sp_sys: .word IWRAM_END - 0x100 +sp_irq: .word IWRAM_END - 0x60 + + .pool + .size Init, .-Init + + .arm + .align 2, 0 + .global IntrMain +IntrMain: @ 0x2010048 + mov ip, REG_BASE + add r3, ip, OFFSET_REG_IE + ldr r2, [r3] + and r1, r2, r2, lsr #16 + mov r2, #0 + ands r0, r1, #0x2000 + strbne r0, [r3, #-0x17c] +_02010064: + bne _02010064 + ands r0, r1, #0xc0 + bne _020100DC + add r2, r2, #4 + ands r0, r1, #1 + strhne r0, [ip, #-8] + bne _020100DC + add r2, r2, #4 + ands r0, r1, #2 + bne _020100DC + add r2, r2, #4 + ands r0, r1, #4 + bne _020100DC + add r2, r2, #4 + ands r0, r1, #0x100 + bne _020100DC + add r2, r2, #4 + ands r0, r1, #0x200 + bne _020100DC + add r2, r2, #4 + ands r0, r1, #0x400 + bne _020100DC + add r2, r2, #4 + ands r0, r1, #0x800 + bne _020100DC + add r2, r2, #4 + ands r0, r1, #0x1000 + bne _020100DC + add r2, r2, #4 + ands r0, r1, #8 +_020100DC: + strh r0, [r3, #2] + ldr r1, =gIntrTable + add r1, r1, r2 + ldr r0, [r1] + bx r0 + .pool + .size IntrMain, .-IntrMain |