usbloadergx/source/patches/patchhook.S

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# (c) Nuke www.usbgecko.com. Licensed under GPL V2
.text
#include "ppc.h"
.globl patchhook # r3 address
patchhook:
mtctr r4
lis r6, 0x4E80
ori r6, r6, 0x0020 # blr
findblr:
lwz r5, 0(r3)
cmpw r6, r5
beq writebranch
addi r3, r3, 4 # next word
bdnz findblr # loop length
b exit # stop unhooked game hanging
writebranch:
lis r4, 0x8000 # 800018A0 hook location (source)
ori r4, r4, 0x18A8
subf r4, r3, r4 # subtract r3 from r4 and place in r4
lis r5, 0x3FF
ori r5, r5, 0xFFFF # 0x3FFFFFF
and r4, r4, r5
lis r5, 0x4800 # 0x48000000
or r4, r4, r5
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exit:
blr # return
.globl patchhook2 # r3 address
patchhook2:
mtctr r4
lis r6, 0x4E80
ori r6, r6, 0x0020 # blr
findblr2:
lwz r5, 0(r3)
cmpw r6, r5
beq writebranch2
addi r3, r3, 4 # next word
bdnz findblr2 # loop length
b exit2 # stop unhooked game hanging
writebranch2:
lis r4, 0x8000 # 81700000 our temp patcher
ori r4, r4, 0x18a8
subf r4, r3, r4 # subtract r3 from r4 and place in r4
lis r5, 0x3FF
ori r5, r5, 0xFFFF # 0x3FFFFFF
and r4, r4, r5
lis r5, 0x4800 # 0x48000000
or r4, r4, r5
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exit2:
blr # return
.globl patchhook3 # r3 address
patchhook3:
mtctr r4
lis r6, 0x4BFF
ori r6, r6, 0xE955 # blr
findbne:
lwz r5, 0(r3)
cmpw r6, r5
beq writebl
addi r3, r3, 4 # next word
bdnz findbne # loop length
b exit3 # stop unhooked game hanging
writebl:
lis r4, 0x4BFF # 81700000 our temp patcher
ori r4, r4, 0xEA91
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exit3:
blr # return
.globl patchhook4 # r3 address
patchhook4:
mtctr r4
lis r6, 0x4082
ori r6, r6, 0x001C # blr
findregion:
lwz r5, 0(r3)
cmpw r6, r5
beq writebr
addi r3, r3, 4 # next word
bdnz findregion # loop length
b exit4 # stop unhooked game hanging
writebr:
lis r4, 0x4800
ori r4, r4, 0x001C
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exit4:
blr # return
.globl multidolpatchone # r3 address
multidolpatchone:
mtctr r4
lis r6, 0x3800
ori r6, r6, 0x0001 # (li r0,1)
findmulti:
lwz r5, 0(r3)
cmpw r6, r5
beq writemulti
subi r3, r3, 4 # go back
bdnz findmulti # loop length
b exit5 # stop unhooked game hanging
writemulti:
lis r4, 0x8170 # 81700000
ori r4, r4, 0x0020
subf r18, r3, r4 # subf r18,(source),(dest)
lis r6, 0x4800
ori r6,r6,1
rlwimi r6,r18,0,6,29
stw r6,0(r3)
stw r6,0(r19)
stw r3,4(r19)
dcbf r0, r3
sync
icbi r0, r3
isync
exit5:
blr # return
.globl multidolpatchtwo # r3 address
multidolpatchtwo:
mtctr r4
lis r6, 0x3F60
ori r6, r6, 0x8000 # (lis r27,-32768)
findmulti2:
lwz r5, 0(r3)
cmpw r6, r5
beq writemulti2
addi r3, r3, 4 # go forward
bdnz findmulti2 # loop length
b exit6 # stop unhooked game hanging
writemulti2:
lis r4, 0x8170 # 81700020
ori r4, r4, 0x0000
subf r18, r3, r4 # subf r18,(source),(dest)
lis r6, 0x4800
ori r6,r6,1
rlwimi r6,r18,0,6,29
stw r6,0(r3)
stw r6,0(r19)
stw r3,4(r19)
dcbf r0, r3
sync
icbi r0, r3
isync
exit6:
blr # return
.globl langvipatch # r3 address, r4 len, r5 lang byte
langvipatch:
mtctr r4
lis r6, 0x8861
ori r6, r6, 0x0008 # lbz r3, 8(sp)
findlang:
lwz r7, 0(r3)
cmpw r6, r7
beq patchlang
addi r3, r3, 4 # next word
bdnz findlang # loop length
b exitlang # stop unhooked game hanging
patchlang:
lis r4, 0x3860 # 0x38600001 li %r3, 1 # eng
add r4, r4, r5
gofinal:
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitlang:
blr # return
.globl vipatch # r3 address
vipatch:
mtctr r4
lis r6, 0x5400
ori r6, r6, 0xFFFE
findvi:
lwz r5, 0(r3)
cmpw r6, r5
beq patchvi
addi r3, r3, 4 # next word
bdnz findvi # loop length
b exitvi # stop unhooked game hanging
patchvi:
lis r4, 0x8000
ori r4, r4, 0x0003
lbz r5, 0(r4)
cmpwi r5, 0x45 # USA
beq patchusa
cmpwi r5, 0x4A
beq patchjap2 # JAP
b exitvi
patchjap2:
lis r4, 0x3800
ori r4, r4, 0x0001
b gofinal2
patchusa:
lis r4, 0x3800
ori r4, r4, 0x0000
gofinal2:
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitvi:
blr # return
.globl regionfreejap # r3 address
regionfreejap:
mtctr r4
lis r6, 0x2C1B
ori r6, r6, 0x0000 # blr
findjap:
lwz r5, 0(r3)
cmpw r6, r5
beq writenop
addi r3, r3, 4 # next word
bdnz findjap # loop length
b exitjap # stop unhooked game hanging
writenop:
addi r3, r3, 4 # next word
lis r4, 0x6000 # nop
ori r4, r4, 0x0000
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitjap:
blr # return
.globl regionfreeusa # r3 address
regionfreeusa:
mtctr r4
lis r6, 0x281B
ori r6, r6, 0x0001 # blr
findusa:
lwz r5, 0(r3)
cmpw r6, r5
beq writenop1
addi r3, r3, 4 # next word
bdnz findusa # loop length
b exitusa # stop unhooked game hanging
writenop1:
addi r3, r3, 4 # next word
lis r4, 0x6000 # nop
ori r4, r4, 0x0000
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitusa:
blr # return
.globl regionfreepal # r3 address
regionfreepal:
mtctr r4
lis r6, 0x281B
ori r6, r6, 0x0002 # blr
findpal:
lwz r5, 0(r3)
cmpw r6, r5
beq writenop2
addi r3, r3, 4 # next word
bdnz findpal # loop length
b exitpal # stop unhooked game hanging
writenop2:
addi r3, r3, 4 # next word
lis r4, 0x6000 # nop
ori r4, r4, 0x0000
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
lis r6, 0x4082
ori r6, r6, 0x001C # bne loc_81377A2C
findextra: #this is just the bne to b patch
lwz r5, 0(r3)
cmpw r6, r5
beq writeb
addi r3, r3, 4 # next word
bdnz findextra # loop length
b exitpal # stop unhooked game hanging
writeb:
addi r3, r3, 4 # next word
lis r4, 0x4800
ori r4, r4, 0x001c # b loc_81377A2C
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitpal:
blr # return
.globl removehealthcheck # r3 address
removehealthcheck:
mtctr r4
lis r6, 0x4182
ori r6, r6, 0x004C # blr
findhe:
lwz r5, 0(r3)
cmpw r6, r5
beq writebhe
addi r3, r3, 4 # next word
bdnz findhe # loop length
b exithe # stop unhooked game hanging
writebhe:
lis r4, 0x6000
ori r4, r4, 0x0000
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exithe:
blr # return
.globl patchupdatecheck # r3 address
patchupdatecheck:
mtctr r4
lis r6, 0x4082
ori r6, r6, 0x0020 # blr
finduc:
lwz r5, 0(r3)
cmpw r6, r5
beq writenopuc
addi r3, r3, 4 # next word
bdnz finduc # loop length
b exituc # stop unhooked game hanging
writenopuc:
lis r4, 0x6000
ori r4, r4, 0x0000
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exituc:
blr # return
.globl copyflagcheck1 # r3 address
copyflagcheck1:
mtctr r4
lis r6, 0x5400
ori r6, r6, 0x07FF
findncf1:
lwz r5, 0(r3)
cmpw r6, r5
beq writencf1
subi r3, r3, 4 # next word
bdnz findncf1 # loop length
b exitncf1 # stop unhooked game hanging
writencf1:
lis r4, 0x7C00
ori r4, r4, 0x0000
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitncf1:
blr # return
.globl copyflagcheck2 # r3 address
copyflagcheck2:
mtctr r4
lis r6, 0x5400
ori r6, r6, 0x07FF
findncf2:
lwz r5, 0(r3)
cmpw r6, r5
beq writencf2
subi r3, r3, 4 # next word
bdnz findncf2 # loop length
b exitncf2 # stop unhooked game hanging
writencf2:
lis r4, 0x7C00
ori r4, r4, 0x0000
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitncf2:
blr # return
.globl copyflagcheck3 # r3 address
copyflagcheck3:
findncf3:
addi r3, r3, 20 # go back one dword (4 bytes)
lwz r5, 0(r3)
writencf3:
lis r4, 0x3860
ori r4, r4, 0x0001 # li r3,1
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitncf3:
blr # return
.globl copyflagcheck4 # r3 address
copyflagcheck4:
mtctr r4
lis r6, 0x3BE0
ori r6, r6, 0x0001 # li r31,1
findncf4:
lwz r5, 0(r3)
cmpw r6, r5
beq writencf4
addi r3, r3, 4 # next word
bdnz findncf4 # loop length
b exitncf4 # stop unhooked game hanging
writencf4:
lis r4, 0x3BE0
ori r4, r4, 0x0000 # change this to 3BE00000 (li r31,0)
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitncf4:
blr # return
.globl copyflagcheck5 # r3 address
copyflagcheck5:
mtctr r4
lis r6, 0x4182
ori r6, r6, 0x0024 # beq loc_8134AA60
findncf5:
lwz r5, 0(r3)
cmpw r6, r5
beq writencf5
addi r3, r3, 4 # next word
bdnz findncf5 # loop length
b exitncf5 # stop unhooked game hanging
writencf5:
#addi r3, r3, 8 # skip 2
lis r4, 0x801D
ori r4, r4, 0x0024 # change to 801D0024 (lwz r0,36(r29))
stw r4, 0(r3)
dcbf r0, r3
icbi r0, r3
addi r3, r3, 4 # next word
lis r4, 0x5400
ori r4, r4, 0x003C # change to 5400003C (rlwinm r0,r0,0,0,30)
stw r4, 0(r3)
dcbf r0, r3
icbi r0, r3
addi r3, r3, 4 # next word
lis r4, 0x901D
ori r4, r4, 0x0024 # change to 901D0024 (stw r0,36(r29))
stw r4, 0(r3)
dcbf r0, r3
icbi r0, r3
addi r3, r3, 4 # next word
lis r4, 0x4800
ori r4, r4, 0x0018 # change to 48000018 (b 0x8134aa60)
stw r4, 0(r3)
dcbf r0, r3
icbi r0, r3
exitncf5:
blr # return
.globl movedvdhooks # r3 address
movedvdhooks:
lis r6, 0x4182
ori r6, r6, 0x0120 # beq loc_813A7938
findmd1:
addi r3, r3, 4 # next word
lwz r5, 0(r3)
writemd1:
lis r4, 0x6000
ori r4, r4, 0x0000 # nop
stw r4, 0(r3) # result in r3
dcbf r0, r3 # data cache block flush
icbi r0, r3
exitmd1:
blr # return