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-reloading IOS to IOS58 before booting homebrew/devolution

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-added AHBPROT patch before reloading to IOS58 (thanks postloader)
This commit is contained in:
fix94.1 2012-08-18 13:38:25 +00:00
parent bcfae365b1
commit 09fb55ae74
2 changed files with 38 additions and 2 deletions
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38
source/loader/alt_ios.cpp
View File

@ -25,7 +25,7 @@ extern "C" {extern u8 currentPartition;}
extern int __Arena2Lo;
u8 use_port1 = 0;
#define HAVE_AHBPROT ((*(vu32*)0xcd800064 == 0xFFFFFFFF) ? 1 : 0)
#define HAVE_AHBPROT ((*(vu32*)0xcd800064 == 0xFFFFFFFF) ? 1 : 0)
static int load_ehc_module_ex(void)
{
@ -79,6 +79,36 @@ void load_dip_249()
mload_close();
}
/* Thanks to postloader for that patch */
#define MEM2_PROT 0x0D8B420A
#define ES_MODULE_START (u16*)0x939F0000
static const u16 ticket_check[] = {
0x685B, // ldr r3,[r3,#4] ; get TMD pointer
0x22EC, 0x0052, // movls r2, 0x1D8
0x189B, // adds r3, r3, r2; add offset of access rights field in TMD
0x681B, // ldr r3, [r3] ; load access rights (haxxme!)
0x4698, // mov r8, r3 ; store it for the DVD video bitcheck later
0x07DB // lsls r3, r3, #31; check AHBPROT bit
};
static void PatchAHB()
{
// Disable memory protection
write16(MEM2_PROT, 2);
for(u16 *patchme = ES_MODULE_START; patchme < ES_MODULE_START + 0x4000; patchme++)
{
if(!memcmp(patchme, ticket_check, sizeof(ticket_check)))
{
// write16/uncached poke doesn't work for this. Go figure.
patchme[4] = 0x23FF; // li r3, 0xFF
DCFlushRange(patchme + 4, 2);
break;
}
}
}
bool loadIOS(int ios, bool launch_game, bool emu_channel)
{
#ifndef DOLPHIN
@ -99,7 +129,10 @@ bool loadIOS(int ios, bool launch_game, bool emu_channel)
USBStorage2_Deinit();
mload_close();
gprintf("Reloading into IOS %i from %i (AHBPROT: %u)...\n", ios, IOS_GetVersion(), HAVE_AHBPROT);
gprintf("Reloading into IOS %i from %i...\n", ios, IOS_GetVersion());
if(HAVE_AHBPROT && ios == 58) //IOS58 with AHBPROT patched out for Homebrew
PatchAHB();
ISFS_Deinitialize();
bool iosOK = IOS_ReloadIOS(ios) == 0;
ISFS_Initialize();
@ -110,6 +143,7 @@ bool loadIOS(int ios, bool launch_game, bool emu_channel)
else if(CurrentIOS.Type == IOS_TYPE_WANIN && CurrentIOS.Revision >= 18)
load_dip_249();
gprintf("AHBPROT after IOS Reload: %u\n", HAVE_AHBPROT);
if(!emu_channel)
{
if(launch_game)

2
source/menu/menu_game.cpp
View File

@ -873,6 +873,7 @@ void CMenu::_launchGC(dir_discHdr *hdr, bool disc)
GC_SetLanguage(GClanguage);
if(loader == 2)
{
loadIOS(58, true, true);
writeStub();
DEVO_Boot();
}
@ -904,6 +905,7 @@ void CMenu::_launchHomebrew(const char *filepath, vector<string> arguments)
USBStorage2_Deinit();
USB_Deinitialize();
#endif
loadIOS(58, true, true);
writeStub();
BootHomebrew();
}