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Make GBAIsROM more portable

This commit is contained in:
Jeffrey Pfau 2014-09-30 01:48:04 -07:00
parent c035d97286
commit d8b0bba968
1 changed files with 5 additions and 4 deletions
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9
src/gba/gba.c
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@ -14,7 +14,8 @@
const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
static const uint64_t GBA_ROM_MAGIC = 0x21A29A6951AEFF24;
static const size_t GBA_ROM_MAGIC_OFFSET = 4;
static const uint8_t GBA_ROM_MAGIC[] = { 0x24, 0xFF, 0xAE, 0x51, 0x69, 0x9A, 0xA2, 0x21 };
enum {
SP_BASE_SYSTEM = 0x03FFFF00,
@ -607,14 +608,14 @@ void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel leve
}
bool GBAIsROM(struct VFile* vf) {
if (vf->seek(vf, 4, SEEK_SET) < 0) {
if (vf->seek(vf, GBA_ROM_MAGIC_OFFSET, SEEK_SET) < 0) {
return false;
}
uint64_t signature;
uint8_t signature[sizeof(GBA_ROM_MAGIC)];
if (vf->read(vf, &signature, sizeof(signature)) != sizeof(signature)) {
return false;
}
return signature == GBA_ROM_MAGIC;
return memcmp(signature, GBA_ROM_MAGIC, sizeof(signature)) == 0;
}
void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {