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Handle out-of-bounds SRAM and ROM reads

This commit is contained in:
Jeffrey Pfau 2014-10-24 01:09:46 -07:00
parent 5450bd8d59
commit 86003496b0
1 changed files with 16 additions and 0 deletions
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16
src/gba/gba-memory.c
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@ -198,7 +198,9 @@ static void GBASetActiveRegion(struct ARMCore* cpu, uint32_t address) {
if ((address & (SIZE_CART0 - 1)) < memory->romSize) { \
LOAD_32(value, address & (SIZE_CART0 - 1), memory->rom); \
} else { \
GBALog(gba, GBA_LOG_GAME_ERROR, "Out of bounds ROM Load32: 0x%08X", address); \
value = (address >> 1) & 0xFFFF; \
value |= value << 16; \
}
#define LOAD_SRAM \
@ -315,6 +317,9 @@ int16_t GBALoad16(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
wait = memory->waitstatesNonseq16[address >> BASE_OFFSET];
if ((address & (SIZE_CART0 - 1)) < memory->romSize) {
LOAD_16(value, address & (SIZE_CART0 - 1), memory->rom);
} else {
GBALog(gba, GBA_LOG_GAME_ERROR, "Out of bounds ROM Load16: 0x%08X", address);
value = (address >> 1) & 0xFFFF; \
}
break;
case REGION_CART2_EX:
@ -323,6 +328,9 @@ int16_t GBALoad16(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
value = GBASavedataReadEEPROM(&memory->savedata);
} else if ((address & (SIZE_CART0 - 1)) < memory->romSize) {
LOAD_16(value, address & (SIZE_CART0 - 1), memory->rom);
} else {
GBALog(gba, GBA_LOG_GAME_ERROR, "Out of bounds ROM Load16: 0x%08X", address);
value = (address >> 1) & 0xFFFF; \
}
break;
case REGION_CART_SRAM:
@ -393,6 +401,9 @@ int8_t GBALoad8(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
wait = memory->waitstatesNonseq16[address >> BASE_OFFSET];
if ((address & (SIZE_CART0 - 1)) < memory->romSize) {
value = ((int8_t*) memory->rom)[address & (SIZE_CART0 - 1)];
} else {
GBALog(gba, GBA_LOG_GAME_ERROR, "Out of bounds ROM Load8: 0x%08X", address);
value = (address >> 1) & 0xFF; \
}
break;
case REGION_CART_SRAM:
@ -406,6 +417,9 @@ int8_t GBALoad8(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
value = memory->savedata.data[address & (SIZE_CART_SRAM - 1)];
} else if (memory->savedata.type == SAVEDATA_FLASH512 || memory->savedata.type == SAVEDATA_FLASH1M) {
value = GBASavedataReadFlash(&memory->savedata, address);
} else {
GBALog(gba, GBA_LOG_GAME_ERROR, "Reading from non-existent SRAM: 0x%08X", address);
value = 7;
}
break;
default:
@ -614,6 +628,8 @@ void GBAStore8(struct ARMCore* cpu, uint32_t address, int8_t value, int* cycleCo
GBASavedataWriteFlash(&memory->savedata, address, value);
} else if (memory->savedata.type == SAVEDATA_SRAM) {
memory->savedata.data[address & (SIZE_CART_SRAM - 1)] = value;
} else {
GBALog(gba, GBA_LOG_GAME_ERROR, "Writing to non-existent SRAM: 0x%08X", address);
}
wait = memory->waitstatesNonseq16[REGION_CART_SRAM];
break;