mirror of
https://gitlab.com/Nanolx/homebrewfilter.git
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86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
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/*--------------------------------------------------------------
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Copyright (C) 2011 Tueidj
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This software falls under the GPL license
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you
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must not claim that you wrote the original software. If you use
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this software in a product, an acknowledgment in the product
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documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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-------------------------------------------------------------*/
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#include <stdlib.h>
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#include <string.h>
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#include <gccore.h>
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#include <ogc/machine/processor.h>
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#include "gecko.h"
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#define CHECK_AHB 0x0D800064
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#define MEM2_PROT 0x0D8B420A
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#define ES_MODULE_START (u16*)0x939F0000
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static const u16 ticket_check[] = {
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0x685B, // ldr r3,[r3,#4] ; get TMD pointer
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0x22EC, 0x0052, // movls r2, 0x1D8
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0x189B, // adds r3, r3, r2 ; add offset of access rights field in TMD
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0x681B, // ldr r3, [r3] ; load access rights (haxxme!)
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0x4698, // mov r8, r3 ; store it for the DVD video bitcheck later
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0x07DB // lsls r3, r3, #31; check AHBPROT bit
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};
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s32 Patch_ahbprot(void)
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{
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// patch HID4 write in HBC stub - this should be done when the extra HID4 bits are turned on
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*(u32*)0x80002174 = 0x60000000;
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if (read32(CHECK_AHB) != -1)
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{
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gprintf("AHBPROT doesn't seem to be disabled.\n");
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return false;
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}
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else
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{
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u16 *patchme;
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write16(MEM2_PROT, 2);
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for (patchme=ES_MODULE_START; patchme < ES_MODULE_START+0x4000; patchme++)
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{
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if (!memcmp(patchme, ticket_check, sizeof(ticket_check)))
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{
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gprintf("Found TMD Access rights check at %p\n", patchme);
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// write16/uncached poke doesn't work for this. Go figure.
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patchme[4] = 0x23FF; // li r3, 0xFF
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DCFlushRange(patchme+4, 2);
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return true;
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//break;
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}
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}
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}
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return false;
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}
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/*
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IOS_ReloadIOS(58); // MEM2 protection re-enabled here
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dprintf("Loaded a new IOS.\n");
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if (read32(CHECK_AHB) != -1)
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dprintf("AHBPROT doesn't seem to be disabled.\n");
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else
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dprintf("AHBPROT is disabled (TADA!).\n");
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*/
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