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systemHook.s
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systemHook.s
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.include "r5900_regs.h"
.set noreorder
.global j_defhandler
.extern dump_memory
.extern jal_cheat
.section .resident, "a" # really gay that i have to compile this specific part at 0x00080000!!
.global systemHook
.ent systemHook
systemHook:
addiu $sp, $sp, -240
sq $ra, 0($sp)
sq $s0, 16($sp)
sq $s1, 32($sp)
sq $s2, 48($sp)
sq $s3, 64($sp)
sq $s4, 80($sp)
sq $s5, 96($sp)
sq $s6, 112($sp)
sq $s7, 128($sp)
sq $a0, 144($sp)
sq $a1, 160($sp)
sq $a2, 176($sp)
sq $v0, 192($sp)
sq $v1, 208($sp)
# --- FOR CHEATING ---
li $v0, 0x001bfa68
li $v1, 0x0c0655f4
sw $v1, _orig_jal
lw $v1, jal_cheats
#li $v1, 0x00090000
sw $v1, 0($v0)
# --- FOR CHEATING ---
lq $v1, 208($sp)
lq $v0, 192($sp)
lq $a2, 176($sp)
lq $a1, 160($sp)
lq $a0, 144($sp)
lq $s7, 128($sp)
lq $s6, 112($sp)
lq $s5, 96($sp)
lq $s4, 80($sp)
lq $s3, 64($sp)
lq $s2, 48($sp)
lq $s1, 32($sp)
lq $s0, 16($sp)
lq $ra, 0($sp)
addiu $sp, $sp, 240
j_defhandler:
nop
nop
jr $ra
nop
.end systemHook
.global readPad
.ent readPad
readPad:
addiu $sp, $sp, -240
sq $ra, 0($sp)
sq $s0, 16($sp)
sq $s1, 32($sp)
sq $s2, 48($sp)
sq $s3, 64($sp)
sq $s4, 80($sp)
sq $s5, 96($sp)
sq $s6, 112($sp)
sq $s7, 128($sp)
sq $a0, 144($sp)
sq $a1, 160($sp)
sq $a2, 176($sp)
sq $v0, 192($sp)
sq $v1, 208($sp)
# -- read joker --
lui $t7, 0x0044
lh $t8, 0xd81c($t7)
# -- read joker --
# L2 + RIGHT
addiu $t7, $zero, 0xFEDF
bne $t7, $t8, end
nop
# DI
mfc0 $v1, $12
lui $v0, 0x0001
and $v1, $v1, $v0
daddu $a0, $zero, $zero
beq $v1, $zero, end
sltu $a1, $zero, $v1
lui $v0, 0x0001
nop
loop:
di
sync.p
mfc0 $v1, $12
nop
and $v1, $v1, $v0
nop
bne $v1, $zero, loop
nop
daddu $a0, $a1, $zero
#jal dump_memory
nop
# EI
mfc0 $v0, $12
lui $v1, 0x0001
and $v0, $v0, $v1
ei
end:
lq $v1, 208($sp)
lq $v0, 192($sp)
lq $a2, 176($sp)
lq $a1, 160($sp)
lq $a0, 144($sp)
lq $s7, 128($sp)
lq $s6, 112($sp)
lq $s5, 96($sp)
lq $s4, 80($sp)
lq $s3, 64($sp)
lq $s2, 48($sp)
lq $s1, 32($sp)
lq $s0, 16($sp)
_orig_jal:
nop
nop
lq $ra, 0($sp)
jr $ra
addiu $sp, $sp, 240
.end readPad