/* Copyright (c) 2013-2015 Jeffrey Pfau * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include #include "gba/cheats/gameshark.h" #include #include const uint32_t GBACheatProActionReplaySeeds[4] = { 0x7AA9648F, 0x7FAE6994, 0xC0EFAAD5, 0x42712C57 }; static const uint8_t _par3T1[256] = { 0xD0, 0xFF, 0xBA, 0xE5, 0xC1, 0xC7, 0xDB, 0x5B, 0x16, 0xE3, 0x6E, 0x26, 0x62, 0x31, 0x2E, 0x2A, 0xD1, 0xBB, 0x4A, 0xE6, 0xAE, 0x2F, 0x0A, 0x90, 0x29, 0x90, 0xB6, 0x67, 0x58, 0x2A, 0xB4, 0x45, 0x7B, 0xCB, 0xF0, 0x73, 0x84, 0x30, 0x81, 0xC2, 0xD7, 0xBE, 0x89, 0xD7, 0x4E, 0x73, 0x5C, 0xC7, 0x80, 0x1B, 0xE5, 0xE4, 0x43, 0xC7, 0x46, 0xD6, 0x6F, 0x7B, 0xBF, 0xED, 0xE5, 0x27, 0xD1, 0xB5, 0xD0, 0xD8, 0xA3, 0xCB, 0x2B, 0x30, 0xA4, 0xF0, 0x84, 0x14, 0x72, 0x5C, 0xFF, 0xA4, 0xFB, 0x54, 0x9D, 0x70, 0xE2, 0xFF, 0xBE, 0xE8, 0x24, 0x76, 0xE5, 0x15, 0xFB, 0x1A, 0xBC, 0x87, 0x02, 0x2A, 0x58, 0x8F, 0x9A, 0x95, 0xBD, 0xAE, 0x8D, 0x0C, 0xA5, 0x4C, 0xF2, 0x5C, 0x7D, 0xAD, 0x51, 0xFB, 0xB1, 0x22, 0x07, 0xE0, 0x29, 0x7C, 0xEB, 0x98, 0x14, 0xC6, 0x31, 0x97, 0xE4, 0x34, 0x8F, 0xCC, 0x99, 0x56, 0x9F, 0x78, 0x43, 0x91, 0x85, 0x3F, 0xC2, 0xD0, 0xD1, 0x80, 0xD1, 0x77, 0xA7, 0xE2, 0x43, 0x99, 0x1D, 0x2F, 0x8B, 0x6A, 0xE4, 0x66, 0x82, 0xF7, 0x2B, 0x0B, 0x65, 0x14, 0xC0, 0xC2, 0x1D, 0x96, 0x78, 0x1C, 0xC4, 0xC3, 0xD2, 0xB1, 0x64, 0x07, 0xD7, 0x6F, 0x02, 0xE9, 0x44, 0x31, 0xDB, 0x3C, 0xEB, 0x93, 0xED, 0x9A, 0x57, 0x05, 0xB9, 0x0E, 0xAF, 0x1F, 0x48, 0x11, 0xDC, 0x35, 0x6C, 0xB8, 0xEE, 0x2A, 0x48, 0x2B, 0xBC, 0x89, 0x12, 0x59, 0xCB, 0xD1, 0x18, 0xEA, 0x72, 0x11, 0x01, 0x75, 0x3B, 0xB5, 0x56, 0xF4, 0x8B, 0xA0, 0x41, 0x75, 0x86, 0x7B, 0x94, 0x12, 0x2D, 0x4C, 0x0C, 0x22, 0xC9, 0x4A, 0xD8, 0xB1, 0x8D, 0xF0, 0x55, 0x2E, 0x77, 0x50, 0x1C, 0x64, 0x77, 0xAA, 0x3E, 0xAC, 0xD3, 0x3D, 0xCE, 0x60, 0xCA, 0x5D, 0xA0, 0x92, 0x78, 0xC6, 0x51, 0xFE, 0xF9, 0x30 }; static const uint8_t _par3T2[256] = { 0xAA, 0xAF, 0xF0, 0x72, 0x90, 0xF7, 0x71, 0x27, 0x06, 0x11, 0xEB, 0x9C, 0x37, 0x12, 0x72, 0xAA, 0x65, 0xBC, 0x0D, 0x4A, 0x76, 0xF6, 0x5C, 0xAA, 0xB0, 0x7A, 0x7D, 0x81, 0xC1, 0xCE, 0x2F, 0x9F, 0x02, 0x75, 0x38, 0xC8, 0xFC, 0x66, 0x05, 0xC2, 0x2C, 0xBD, 0x91, 0xAD, 0x03, 0xB1, 0x88, 0x93, 0x31, 0xC6, 0xAB, 0x40, 0x23, 0x43, 0x76, 0x54, 0xCA, 0xE7, 0x00, 0x96, 0x9F, 0xD8, 0x24, 0x8B, 0xE4, 0xDC, 0xDE, 0x48, 0x2C, 0xCB, 0xF7, 0x84, 0x1D, 0x45, 0xE5, 0xF1, 0x75, 0xA0, 0xED, 0xCD, 0x4B, 0x24, 0x8A, 0xB3, 0x98, 0x7B, 0x12, 0xB8, 0xF5, 0x63, 0x97, 0xB3, 0xA6, 0xA6, 0x0B, 0xDC, 0xD8, 0x4C, 0xA8, 0x99, 0x27, 0x0F, 0x8F, 0x94, 0x63, 0x0F, 0xB0, 0x11, 0x94, 0xC7, 0xE9, 0x7F, 0x3B, 0x40, 0x72, 0x4C, 0xDB, 0x84, 0x78, 0xFE, 0xB8, 0x56, 0x08, 0x80, 0xDF, 0x20, 0x2F, 0xB9, 0x66, 0x2D, 0x60, 0x63, 0xF5, 0x18, 0x15, 0x1B, 0x86, 0x85, 0xB9, 0xB4, 0x68, 0x0E, 0xC6, 0xD1, 0x8A, 0x81, 0x2B, 0xB3, 0xF6, 0x48, 0xF0, 0x4F, 0x9C, 0x28, 0x1C, 0xA4, 0x51, 0x2F, 0xD7, 0x4B, 0x17, 0xE7, 0xCC, 0x50, 0x9F, 0xD0, 0xD1, 0x40, 0x0C, 0x0D, 0xCA, 0x83, 0xFA, 0x5E, 0xCA, 0xEC, 0xBF, 0x4E, 0x7C, 0x8F, 0xF0, 0xAE, 0xC2, 0xD3, 0x28, 0x41, 0x9B, 0xC8, 0x04, 0xB9, 0x4A, 0xBA, 0x72, 0xE2, 0xB5, 0x06, 0x2C, 0x1E, 0x0B, 0x2C, 0x7F, 0x11, 0xA9, 0x26, 0x51, 0x9D, 0x3F, 0xF8, 0x62, 0x11, 0x2E, 0x89, 0xD2, 0x9D, 0x35, 0xB1, 0xE4, 0x0A, 0x4D, 0x93, 0x01, 0xA7, 0xD1, 0x2D, 0x00, 0x87, 0xE2, 0x2D, 0xA4, 0xE9, 0x0A, 0x06, 0x66, 0xF8, 0x1F, 0x44, 0x75, 0xB5, 0x6B, 0x1C, 0xFC, 0x31, 0x09, 0x48, 0xA3, 0xFF, 0x92, 0x12, 0x58, 0xE9, 0xFA, 0xAE, 0x4F, 0xE2, 0xB4, 0xCC }; static uint32_t _parAddr(uint32_t x) { return (x & 0xFFFFF) | ((x << 4) & 0x0F000000); } static void _parEndBlock(struct GBACheatSet* cheats) { size_t size = mCheatListSize(&cheats->d.list) - cheats->currentBlock; struct mCheat* currentBlock = mCheatListGetPointer(&cheats->d.list, cheats->currentBlock); if (currentBlock->repeat) { currentBlock->negativeRepeat = size - currentBlock->repeat; } else { currentBlock->repeat = size; } cheats->currentBlock = COMPLETE; } static void _parElseBlock(struct GBACheatSet* cheats) { size_t size = mCheatListSize(&cheats->d.list) - cheats->currentBlock; struct mCheat* currentBlock = mCheatListGetPointer(&cheats->d.list, cheats->currentBlock); currentBlock->repeat = size; } static bool _addPAR3Cond(struct GBACheatSet* cheats, uint32_t op1, uint32_t op2) { enum GBAActionReplay3Condition condition = op1 & PAR3_COND; int width = 1 << ((op1 & PAR3_WIDTH) >> PAR3_WIDTH_BASE); if (width > 4) { // TODO: Always false conditions return false; } if ((op1 & PAR3_ACTION) == PAR3_ACTION_DISABLE) { // TODO: Codes that disable return false; } struct mCheat* cheat = mCheatListAppend(&cheats->d.list); cheat->address = _parAddr(op1); cheat->width = width; cheat->operand = op2 & (0xFFFFFFFFU >> ((4 - width) * 8)); cheat->addressOffset = 0; cheat->operandOffset = 0; switch (op1 & PAR3_ACTION) { case PAR3_ACTION_NEXT: cheat->repeat = 1; cheat->negativeRepeat = 0; break; case PAR3_ACTION_NEXT_TWO: cheat->repeat = 2; cheat->negativeRepeat = 0; break; case PAR3_ACTION_BLOCK: cheat->repeat = 0; cheat->negativeRepeat = 0; if (cheats->currentBlock != COMPLETE) { _parEndBlock(cheats); } cheats->currentBlock = mCheatListIndex(&cheats->d.list, cheat); break; } switch (condition) { case PAR3_COND_OTHER: // We shouldn't be able to get here mLOG(CHEATS, ERROR, "Unexpectedly created 'other' PARv3 code"); cheat->type = CHEAT_IF_LAND; cheat->operand = 0; break; case PAR3_COND_EQ: cheat->type = CHEAT_IF_EQ; break; case PAR3_COND_NE: cheat->type = CHEAT_IF_NE; break; case PAR3_COND_LT: cheat->type = CHEAT_IF_LT; break; case PAR3_COND_GT: cheat->type = CHEAT_IF_GT; break; case PAR3_COND_ULT: cheat->type = CHEAT_IF_ULT; break; case PAR3_COND_UGT: cheat->type = CHEAT_IF_UGT; break; case PAR3_COND_LAND: cheat->type = CHEAT_IF_LAND; break; } return true; } static bool _addPAR3Special(struct GBACheatSet* cheats, uint32_t op2) { struct mCheat* cheat; switch (op2 & 0xFF000000) { case PAR3_OTHER_SLOWDOWN: // TODO: Slowdown return false; case PAR3_OTHER_BUTTON_1: case PAR3_OTHER_BUTTON_2: case PAR3_OTHER_BUTTON_4: // TODO: Button mLOG(CHEATS, STUB, "GameShark button unimplemented"); return false; // TODO: Fix overriding existing patches case PAR3_OTHER_PATCH_1: cheats->romPatches[0].address = BASE_CART0 | ((op2 & 0xFFFFFF) << 1); cheats->romPatches[0].applied = false; cheats->romPatches[0].exists = true; cheats->incompletePatch = &cheats->romPatches[0]; break; case PAR3_OTHER_PATCH_2: cheats->romPatches[1].address = BASE_CART0 | ((op2 & 0xFFFFFF) << 1); cheats->romPatches[1].applied = false; cheats->romPatches[1].exists = true; cheats->incompletePatch = &cheats->romPatches[1]; break; case PAR3_OTHER_PATCH_3: cheats->romPatches[2].address = BASE_CART0 | ((op2 & 0xFFFFFF) << 1); cheats->romPatches[2].applied = false; cheats->romPatches[2].exists = true; cheats->incompletePatch = &cheats->romPatches[2]; break; case PAR3_OTHER_PATCH_4: cheats->romPatches[3].address = BASE_CART0 | ((op2 & 0xFFFFFF) << 1); cheats->romPatches[3].applied = false; cheats->romPatches[3].exists = true; cheats->incompletePatch = &cheats->romPatches[3]; break; case PAR3_OTHER_ENDIF: if (cheats->currentBlock != COMPLETE) { _parEndBlock(cheats); return true; } return false; case PAR3_OTHER_ELSE: if (cheats->currentBlock != COMPLETE) { _parElseBlock(cheats); return true; } return false; case PAR3_OTHER_FILL_1: cheat = mCheatListAppend(&cheats->d.list); cheat->address = _parAddr(op2); cheat->width = 1; cheats->incompleteCheat = mCheatListIndex(&cheats->d.list, cheat); break; case PAR3_OTHER_FILL_2: cheat = mCheatListAppend(&cheats->d.list); cheat->address = _parAddr(op2); cheat->width = 2; cheats->incompleteCheat = mCheatListIndex(&cheats->d.list, cheat); break; case PAR3_OTHER_FILL_4: cheat = mCheatListAppend(&cheats->d.list); cheat->address = _parAddr(op2); cheat->width = 3; cheats->incompleteCheat = mCheatListIndex(&cheats->d.list, cheat); break; } return true; } bool GBACheatAddProActionReplayRaw(struct GBACheatSet* cheats, uint32_t op1, uint32_t op2) { if (cheats->incompletePatch) { cheats->incompletePatch->newValue = op1; cheats->incompletePatch = 0; return true; } if (cheats->incompleteCheat != COMPLETE) { struct mCheat* incompleteCheat = mCheatListGetPointer(&cheats->d.list, cheats->incompleteCheat); incompleteCheat->operand = op1 & (0xFFFFFFFFU >> ((4 - incompleteCheat->width) * 8)); incompleteCheat->addressOffset = op2 >> 24; incompleteCheat->repeat = (op2 >> 16) & 0xFF; incompleteCheat->addressOffset = (op2 & 0xFFFF) * incompleteCheat->width; cheats->incompleteCheat = COMPLETE; return true; } if (op2 == 0x001DC0DE) { return true; } switch (op1) { case 0x00000000: return _addPAR3Special(cheats, op2); case 0xDEADFACE: GBACheatReseedGameShark(cheats->gsaSeeds, op2, _par3T1, _par3T2); return true; } if (op1 >> 24 == 0xC4) { if (cheats->hook) { return false; } cheats->hook = malloc(sizeof(*cheats->hook)); cheats->hook->address = BASE_CART0 | (op1 & (SIZE_CART0 - 1)); cheats->hook->mode = MODE_THUMB; cheats->hook->refs = 1; cheats->hook->reentries = 0; return true; } if (op1 & PAR3_COND) { return _addPAR3Cond(cheats, op1, op2); } int width = 1 << ((op1 & PAR3_WIDTH) >> PAR3_WIDTH_BASE); struct mCheat* cheat = mCheatListAppend(&cheats->d.list); cheat->address = _parAddr(op1); cheat->operandOffset = 0; cheat->addressOffset = 0; cheat->repeat = 1; switch (op1 & PAR3_BASE) { case PAR3_BASE_ASSIGN: cheat->type = CHEAT_ASSIGN; cheat->addressOffset = width; if (width < 4) { cheat->repeat = (op2 >> (width * 8)) + 1; } break; case PAR3_BASE_INDIRECT: cheat->type = CHEAT_ASSIGN_INDIRECT; if (width < 4) { cheat->addressOffset = (op2 >> (width * 8)) * width; } break; case PAR3_BASE_ADD: cheat->type = CHEAT_ADD; break; case PAR3_BASE_OTHER: width = ((op1 >> 24) & 1) + 1; cheat->type = CHEAT_ASSIGN; cheat->address = BASE_IO | (op1 & OFFSET_MASK); break; } cheat->width = width; cheat->operand = op2 & (0xFFFFFFFFU >> ((4 - width) * 8)); return true; } bool GBACheatAddProActionReplay(struct GBACheatSet* set, uint32_t op1, uint32_t op2) { uint32_t o1 = op1; uint32_t o2 = op2; char line[18] = "XXXXXXXX XXXXXXXX"; snprintf(line, sizeof(line), "%08X %08X", op1, op2); switch (set->gsaVersion) { case 0: case 1: case 2: GBACheatSetGameSharkVersion(set, 3); // Fall through case 3: case 4: GBACheatDecryptGameShark(&o1, &o2, set->gsaSeeds); return GBACheatAddProActionReplayRaw(set, o1, o2); } return false; } bool GBACheatAddProActionReplayLine(struct GBACheatSet* cheats, const char* line) { uint32_t op1; uint32_t op2; line = hex32(line, &op1); if (!line) { return false; } while (*line == ' ') { ++line; } line = hex32(line, &op2); if (!line) { return false; } return GBACheatAddProActionReplay(cheats, op1, op2); } int GBACheatProActionReplayProbability(uint32_t op1, uint32_t op2) { int probability = 0; if (op2 == 0x001DC0DE) { return 0x100; } if (op1 == 0xDEADFACE && !(op2 & 0xFFFF0000)) { return 0x100; } if (!op1) { probability += 0x20; uint32_t address = _parAddr(op2); switch (op2 & 0xFE000000) { case PAR3_OTHER_FILL_1: case PAR3_OTHER_FILL_2: case PAR3_OTHER_FILL_4: probability += GBACheatAddressIsReal(address); break; case PAR3_OTHER_PATCH_1: case PAR3_OTHER_PATCH_2: case PAR3_OTHER_PATCH_3: case PAR3_OTHER_PATCH_4: // TODO: Detect ROM address break; case PAR3_OTHER_END: case PAR3_OTHER_SLOWDOWN: case PAR3_OTHER_BUTTON_1: case PAR3_OTHER_BUTTON_2: case PAR3_OTHER_BUTTON_4: case PAR3_OTHER_ENDIF: case PAR3_OTHER_ELSE: if (op2 & 0x01FFFFFF) { probability -= 0x20; } break; default: probability -= 0x40; break; } return probability; } int width = ((op1 & PAR3_WIDTH) >> (PAR3_WIDTH_BASE - 3)); if (op1 & PAR3_COND) { probability += 0x20; if (width == 32) { return 0; } if (op2 & ~((1 << width) - 1)) { probability -= 0x10; } } else { uint32_t address = _parAddr(op1); probability += 0x20; switch (op1 & PAR3_BASE) { case PAR3_BASE_ADD: if (op2 & ~((1 << width) - 1)) { probability -= 0x10; } case PAR3_BASE_ASSIGN: case PAR3_BASE_INDIRECT: probability += GBACheatAddressIsReal(address); // Fall through break; case PAR3_BASE_OTHER: break; } } return probability; }