M CHANGES → CHANGES

@@ -32,6 +32,7 @@ - GBA Thread: Fix possible hang when loading an archive
  - Perf: Fix crash when the GBA thread fails to start
  - SDL: Properly clean up if a game doesn't launch
  - Debugger: Disassembly now lists PSR bitmasks (fixes #191)
+ - GBA BIOS: Prevent CpuSet and CpuFastSet from using BIOS addresses as a source (fixes #184)
 Misc:
  - GBA Audio: Change internal audio sample buffer from 32-bit to 16-bit samples
  - GBA Memory: Simplify memory API and use fixed bus width

M src/gba/gba-bios.c → src/gba/gba-bios.c

@@ -212,6 +212,10 @@ cpu->gprs[0] = atan2f(cpu->gprs[1] / 16384.f, cpu->gprs[0] / 16384.f) / (2 * M_PI) * 0x10000;
 		break;
 	case 0xB:
 	case 0xC:
+		if (cpu->gprs[0] >> BASE_OFFSET == REGION_BIOS) {
+			GBALog(gba, GBA_LOG_GAME_ERROR, "Cannot CpuSet from BIOS");
+			return;
+		}
 		ARMRaiseSWI(cpu);
 		break;
 	case 0xD: