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Savestate game checks

This commit is contained in:
Jeffrey Pfau 2014-01-20 17:18:12 -08:00
parent 26c1fbd48f
commit 872c3ceba3
5 changed files with 28 additions and 4 deletions
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15
src/gba/gba-serialize.c
View File

@ -13,6 +13,9 @@ const uint32_t GBA_SAVESTATE_MAGIC = 0x01000000;
void GBASerialize(struct GBA* gba, struct GBASerializedState* state) {
state->versionMagic = GBA_SAVESTATE_MAGIC;
state->biosChecksum = gba->biosChecksum;
state->id = ((struct GBACartridge*) gba->memory.rom)->id;
memcpy(state->title, ((struct GBACartridge*) gba->memory.rom)->title, sizeof(state->title));
memcpy(state->cpu.gprs, gba->cpu.gprs, sizeof(state->cpu.gprs));
state->cpu.cpsr = gba->cpu.cpsr;
@ -28,6 +31,18 @@ void GBASerialize(struct GBA* gba, struct GBASerializedState* state) {
}
void GBADeserialize(struct GBA* gba, struct GBASerializedState* state) {
if (state->versionMagic != GBA_SAVESTATE_MAGIC) {
GBALog(gba, GBA_LOG_WARN, "Invalid or too new savestate");
return;
}
if (state->biosChecksum != gba->biosChecksum) {
GBALog(gba, GBA_LOG_WARN, "Savestate created using a different version of the BIOS");
return;
}
if (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");
return;
}
memcpy(gba->cpu.gprs, state->cpu.gprs, sizeof(gba->cpu.gprs));
gba->cpu.cpsr = state->cpu.cpsr;
gba->cpu.spsr = state->cpu.spsr;

3
src/gba/gba.c
View File

@ -133,6 +133,8 @@ void GBAInit(struct GBA* gba) {
gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR;
gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
ARMReset(&gba->cpu);
}
@ -371,6 +373,7 @@ void GBALoadBIOS(struct GBA* gba, int fd) {
} else {
GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
}
gba->biosChecksum = checksum;
if ((gba->cpu.gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
gba->memory.d.setActiveRegion(&gba->memory.d, gba->cpu.gprs[ARM_PC]);
}

1
src/gba/gba.h
View File

@ -86,6 +86,7 @@ struct GBA {
} timers[4];
int springIRQ;
uint32_t biosChecksum;
int* keySource;
struct GBARotationSource* rotationSource;
struct GBARumble* rumble;

6
src/gba/hle-bios.c
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@ -1,7 +1,9 @@
#include "hle-bios.h"
const unsigned int hleBiosLength = 196;
const unsigned char hleBios[] = {
#include "gba-memory.h"
const size_t hleBiosLength = 196;
const uint8_t hleBios[SIZE_BIOS] = {
0x06, 0x00, 0x00, 0xea, 0xfe, 0xff, 0xff, 0xea, 0x05, 0x00, 0x00, 0xea,
0xfe, 0xff, 0xff, 0xea, 0xfe, 0xff, 0xff, 0xea, 0x00, 0x00, 0xa0, 0xe1,
0x0e, 0x00, 0x00, 0xea, 0xfe, 0xff, 0xff, 0xea, 0x02, 0xf3, 0xa0, 0xe3,

7
src/gba/hle-bios.h
View File

@ -1,7 +1,10 @@
#ifndef HLE_BIOS_H
#define HLE_BIOS_H
extern const unsigned int hleBiosLength;
extern const unsigned char hleBios[];
#include <stdint.h>
#include <string.h>
extern const size_t hleBiosLength;
extern const uint8_t hleBios[];
#endif