bool GBADeserialize(struct GBA* gba, const struct GBASerializedState* state) {
bool error = false;
int32_t check;
uint32_t ucheck;
LOAD_32(ucheck, 0, &state->versionMagic);
if (ucheck > GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION) {
mLOG(GBA_STATE, WARN, "Invalid or too new savestate: expected %08X, got %08X", GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION, ucheck);
error = true;
} else if (ucheck < GBA_SAVESTATE_MAGIC) {
mLOG(GBA_STATE, WARN, "Invalid savestate: expected %08X, got %08X", GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION, ucheck);
error = true;
} else if (ucheck < GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION) {
mLOG(GBA_STATE, WARN, "Old savestate: expected %08X, got %08X, continuing anyway", GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION, ucheck);
}
LOAD_32(ucheck, 0, &state->biosChecksum);
if (ucheck != gba->biosChecksum) {
mLOG(GBA_STATE, WARN, "Savestate created using a different version of the BIOS: expected %08X, got %08X", gba->biosChecksum, ucheck);
uint32_t pc;
LOAD_32(pc, ARM_PC * sizeof(state->cpu.gprs[0]), state->cpu.gprs);
if (pc < SIZE_BIOS && pc >= 0x20) {
error = true;
}
}
if (gba->memory.rom && (state->id != ((struct GBACartridge*) gba->memory.rom)->id || memcmp(state->title, ((struct GBACartridge*) gba->memory.rom)->title, sizeof(state->title)))) {
mLOG(GBA_STATE, WARN, "Savestate is for a different game");
error = true;
} else if (!gba->memory.rom && state->id != 0) {
mLOG(GBA_STATE, WARN, "Savestate is for a game, but no game loaded");
error = true;
}
LOAD_32(ucheck, 0, &state->romCrc32);
if (ucheck != gba->romCrc32) {
mLOG(GBA_STATE, WARN, "Savestate is for a different version of the game");
}
LOAD_32(check, 0, &state->cpu.cycles);
if (check < 0) {
mLOG(GBA_STATE, WARN, "Savestate is corrupted: CPU cycles are negative");
error = true;
}
if (check >= (int32_t) GBA_ARM7TDMI_FREQUENCY) {
mLOG(GBA_STATE, WARN, "Savestate is corrupted: CPU cycles are too high");
error = true;
}
LOAD_32(check, 0, &state->video.eventDiff);
if (check < 0) {
mLOG(GBA_STATE, WARN, "Savestate is corrupted: video eventDiff is negative");
error = true;
}
LOAD_32(check, ARM_PC * sizeof(state->cpu.gprs[0]), state->cpu.gprs);
int region = (check >> BASE_OFFSET);
if ((region == REGION_CART0 || region == REGION_CART1 || region == REGION_CART2) && ((check - WORD_SIZE_ARM) & SIZE_CART0) >= gba->memory.romSize - WORD_SIZE_ARM) {
mLOG(GBA_STATE, WARN, "Savestate created using a differently sized version of the ROM");
error = true;
}
if (error) {
return false;
}
size_t i;
for (i = 0; i < 16; ++i) {
LOAD_32(gba->cpu->gprs[i], i * sizeof(gba->cpu->gprs[0]), state->cpu.gprs);
}
LOAD_32(gba->cpu->cpsr.packed, 0, &state->cpu.cpsr.packed);
LOAD_32(gba->cpu->spsr.packed, 0, &state->cpu.spsr.packed);
LOAD_32(gba->cpu->cycles, 0, &state->cpu.cycles);
LOAD_32(gba->cpu->nextEvent, 0, &state->cpu.nextEvent);
for (i = 0; i < 6; ++i) {
int j;
for (j = 0; j < 7; ++j) {
LOAD_32(gba->cpu->bankedRegisters[i][j], (i * 7 + j) * sizeof(gba->cpu->bankedRegisters[0][0]), state->cpu.bankedRegisters);
}
LOAD_32(gba->cpu->bankedSPSRs[i], i * sizeof(gba->cpu->bankedSPSRs[0]), state->cpu.bankedSPSRs);
}
gba->cpu->privilegeMode = gba->cpu->cpsr.a.priv;
gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
if (state->biosPrefetch) {
LOAD_32(gba->memory.biosPrefetch, 0, &state->biosPrefetch);
}
LOAD_32(gba->memory.lastPrefetchedPc, 0, &state->lastPrefetchedPc);
if (gba->cpu->cpsr.a.t) {
gba->cpu->executionMode = MODE_THUMB;
if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
LOAD_32(gba->cpu->prefetch[0], 0, state->cpuPrefetch);
LOAD_32(gba->cpu->prefetch[1], 4, state->cpuPrefetch);
gba->cpu->prefetch[0] &= 0xFFFF;
gba->cpu->prefetch[1] &= 0xFFFF;
} else {
// Maintain backwards compat
LOAD_16(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_THUMB) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
LOAD_16(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
}
} else {
gba->cpu->executionMode = MODE_ARM;
if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
LOAD_32(gba->cpu->prefetch[0], 0, state->cpuPrefetch);
LOAD_32(gba->cpu->prefetch[1], 4, state->cpuPrefetch);
} else {
// Maintain backwards compat
LOAD_32(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_ARM) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
LOAD_32(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
}
}
GBASerializedMiscFlags miscFlags = 0;
LOAD_32(miscFlags, 0, &state->miscFlags);
gba->cpu->halted = GBASerializedMiscFlagsGetHalted(miscFlags);
GBAVideoDeserialize(&gba->video, state);
GBAMemoryDeserialize(&gba->memory, state);
GBAIODeserialize(gba, state);
GBAAudioDeserialize(&gba->audio, state);
GBASavedataDeserialize(&gba->memory.savedata, state);
if (gba->rr) {
gba->rr->stateLoaded(gba->rr, state);
}
return true;
}
bool GBASavedataImportSharkPort(struct GBA* gba, struct VFile* vf, bool testChecksum) {
union {
char c[0x1C];
int32_t i;
} buffer;
if (vf->read(vf, &buffer.i, 4) < 4) {
return false;
}
int32_t size;
LOAD_32(size, 0, &buffer.i);
if (size != (int32_t) strlen(SHARKPORT_HEADER)) {
return false;
}
if (vf->read(vf, buffer.c, size) < size) {
return false;
}
if (memcmp(SHARKPORT_HEADER, buffer.c, size) != 0) {
return false;
}
if (vf->read(vf, &buffer.i, 4) < 4) {
return false;
}
LOAD_32(size, 0, &buffer.i);
if (size != 0x000F0000) {
// What is this value?
return false;
}
// Skip first three fields
if (vf->read(vf, &buffer.i, 4) < 4) {
return false;
}
LOAD_32(size, 0, &buffer.i);
if (vf->seek(vf, size, SEEK_CUR) < 0) {
return false;
}
if (vf->read(vf, &buffer.i, 4) < 4) {
return false;
}
LOAD_32(size, 0, &buffer.i);
if (vf->seek(vf, size, SEEK_CUR) < 0) {
return false;
}
if (vf->read(vf, &buffer.i, 4) < 4) {
return false;
}
LOAD_32(size, 0, &buffer.i);
if (vf->seek(vf, size, SEEK_CUR) < 0) {
return false;
}
// Read payload
if (vf->read(vf, &buffer.i, 4) < 4) {
return false;
}
LOAD_32(size, 0, &buffer.i);
if (size < 0x1C || size > SIZE_CART_FLASH1M + 0x1C) {
return false;
}
char* payload = malloc(size);
if (vf->read(vf, payload, size) < size) {
goto cleanup;
}
struct GBACartridge* cart = (struct GBACartridge*) gba->memory.rom;
memcpy(buffer.c, &cart->title, 16);
buffer.c[0x10] = 0;
buffer.c[0x11] = 0;
buffer.c[0x12] = cart->checksum;
buffer.c[0x13] = cart->maker;
buffer.c[0x14] = 1;
buffer.c[0x15] = 0;
buffer.c[0x16] = 0;
buffer.c[0x17] = 0;
buffer.c[0x18] = 0;
buffer.c[0x19] = 0;
buffer.c[0x1A] = 0;
buffer.c[0x1B] = 0;
if (memcmp(buffer.c, payload, 0x1C) != 0) {
goto cleanup;
}
uint32_t checksum;
if (vf->read(vf, &buffer.i, 4) < 4) {
goto cleanup;
}
LOAD_32(checksum, 0, &buffer.i);
if (testChecksum) {
uint32_t calcChecksum = 0;
int i;
for (i = 0; i < size; ++i) {
calcChecksum += ((int32_t) payload[i]) << (calcChecksum % 24);
}
if (calcChecksum != checksum) {
goto cleanup;
}
}
uint32_t copySize = size - 0x1C;
switch (gba->memory.savedata.type) {
case SAVEDATA_SRAM:
if (copySize > SIZE_CART_SRAM) {
copySize = SIZE_CART_SRAM;
}
break;
case SAVEDATA_FLASH512:
if (copySize > SIZE_CART_FLASH512) {
GBASavedataForceType(&gba->memory.savedata, SAVEDATA_FLASH1M, gba->memory.savedata.realisticTiming);
}
// Fall through
case SAVEDATA_FLASH1M:
if (copySize > SIZE_CART_FLASH1M) {
copySize = SIZE_CART_FLASH1M;
}
break;
case SAVEDATA_EEPROM:
if (copySize > SIZE_CART_EEPROM) {
copySize = SAVEDATA_EEPROM;
}
break;
case SAVEDATA_FORCE_NONE:
case SAVEDATA_AUTODETECT:
goto cleanup;
}
memcpy(gba->memory.savedata.data, &payload[0x1C], copySize);
free(payload);
return true;
cleanup:
free(payload);
return false;
}
bool GBADeserialize(struct GBA* gba, const struct GBASerializedState* state) {
bool error = false;
if (state->versionMagic != GBA_SAVESTATE_MAGIC) {
GBALog(gba, GBA_LOG_WARN, "Invalid or too new savestate");
error = true;
}
if (state->biosChecksum != gba->biosChecksum) {
GBALog(gba, GBA_LOG_WARN, "Savestate created using a different version of the BIOS");
if (state->cpu.gprs[ARM_PC] < SIZE_BIOS && state->cpu.gprs[ARM_PC] >= 0x20) {
error = true;
}
}
if (gba->memory.rom && (state->id != ((struct GBACartridge*) gba->memory.rom)->id || memcmp(state->title, ((struct GBACartridge*) gba->memory.rom)->title, sizeof(state->title)))) {
GBALog(gba, GBA_LOG_WARN, "Savestate is for a different game");
error = true;
} else if (!gba->memory.rom && state->id != 0) {
GBALog(gba, GBA_LOG_WARN, "Savestate is for a game, but no game loaded");
error = true;
}
if (state->romCrc32 != gba->romCrc32) {
GBALog(gba, GBA_LOG_WARN, "Savestate is for a different version of the game");
}
if (state->cpu.cycles < 0) {
GBALog(gba, GBA_LOG_WARN, "Savestate is corrupted: CPU cycles are negative");
error = true;
}
if (state->cpu.cycles >= (int32_t) GBA_ARM7TDMI_FREQUENCY) {
GBALog(gba, GBA_LOG_WARN, "Savestate is corrupted: CPU cycles are too high");
error = true;
}
if (state->video.eventDiff < 0) {
GBALog(gba, GBA_LOG_WARN, "Savestate is corrupted: video eventDiff is negative");
error = true;
}
int region = (state->cpu.gprs[ARM_PC] >> BASE_OFFSET);
if ((region == REGION_CART0 || region == REGION_CART1 || region == REGION_CART2) && ((state->cpu.gprs[ARM_PC] - WORD_SIZE_ARM) & SIZE_CART0) >= gba->memory.romSize - WORD_SIZE_ARM) {
GBALog(gba, GBA_LOG_WARN, "Savestate created using a differently sized version of the ROM");
error = true;
}
if (error) {
return false;
}
memcpy(gba->cpu->gprs, state->cpu.gprs, sizeof(gba->cpu->gprs));
gba->cpu->cpsr = state->cpu.cpsr;
gba->cpu->spsr = state->cpu.spsr;
gba->cpu->cycles = state->cpu.cycles;
gba->cpu->nextEvent = state->cpu.nextEvent;
memcpy(gba->cpu->bankedRegisters, state->cpu.bankedRegisters, 6 * 7 * sizeof(int32_t));
memcpy(gba->cpu->bankedSPSRs, state->cpu.bankedSPSRs, 6 * sizeof(int32_t));
gba->cpu->privilegeMode = gba->cpu->cpsr.priv;
gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
if (state->biosPrefetch) {
gba->memory.biosPrefetch = state->biosPrefetch;
}
if (gba->cpu->cpsr.t) {
gba->cpu->executionMode = MODE_THUMB;
if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
gba->cpu->prefetch[0] = state->cpuPrefetch[0] & 0xFFFF;
gba->cpu->prefetch[1] = state->cpuPrefetch[1] & 0xFFFF;
} else {
// Maintain backwards compat
LOAD_16(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_THUMB) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
LOAD_16(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
}
} else {
gba->cpu->executionMode = MODE_ARM;
if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
gba->cpu->prefetch[0] = state->cpuPrefetch[0];
gba->cpu->prefetch[1] = state->cpuPrefetch[1];
} else {
// Maintain backwards compat
LOAD_32(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_ARM) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
LOAD_32(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
}
}
GBAMemoryDeserialize(&gba->memory, state);
GBAIODeserialize(gba, state);
GBAVideoDeserialize(&gba->video, state);
GBAAudioDeserialize(&gba->audio, state);
GBASavedataDeserialize(&gba->memory.savedata, state, false);
if (gba->rr) {
gba->rr->stateLoaded(gba->rr, state);
}
return true;
}
