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Handle illegal and stub opcodes separately

This commit is contained in:
Jeffrey Pfau 2014-01-18 00:39:51 -08:00
parent ce4d0b5203
commit a969d70de3
5 changed files with 29 additions and 8 deletions
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1
src/arm/arm.h
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@ -117,6 +117,7 @@ struct ARMBoard {
void (*processEvents)(struct ARMBoard* board);
void (*swi16)(struct ARMBoard* board, int immediate);
void (*swi32)(struct ARMBoard* board, int immediate);
void (*hitIllegal)(struct ARMBoard* board, uint32_t opcode);
void (*readCPSR)(struct ARMBoard* board);
void (*hitStub)(struct ARMBoard* board, uint32_t opcode);

20
src/arm/isa-arm.c
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@ -744,10 +744,18 @@ DEFINE_INSTRUCTION_ARM(BX,
// End branch definitions
// Begin coprocessor definitions
DEFINE_INSTRUCTION_ARM(CDP, ARM_STUB)
DEFINE_INSTRUCTION_ARM(LDC, ARM_STUB)
DEFINE_INSTRUCTION_ARM(STC, ARM_STUB)
DEFINE_INSTRUCTION_ARM(MCR, ARM_STUB)
DEFINE_INSTRUCTION_ARM(MRC, ARM_STUB)
// Begin miscellaneous definitions
DEFINE_INSTRUCTION_ARM(BKPT, ARM_STUB) // Not strictly in ARMv4T, but here for convenience
DEFINE_INSTRUCTION_ARM(ILL, ARM_STUB) // Illegal opcode
DEFINE_INSTRUCTION_ARM(ILL, ARM_ILL) // Illegal opcode
DEFINE_INSTRUCTION_ARM(MSR,
int c = opcode & 0x00010000;
@ -858,13 +866,12 @@ DEFINE_INSTRUCTION_ARM(SWI, cpu->board->swi32(cpu->board, opcode & 0xFFFFFF))
DO_256(DECLARE_INSTRUCTION_ARM(EMITTER, NAME))
// TODO: Support coprocessors
#define DECLARE_ARM_LOAD_STORE_COPROCESSOR_BLOCK(EMITTER, NAME, P, U, W, N) \
DO_8(0), \
DO_8(0)
#define DECLARE_ARM_LOAD_STORE_COPROCESSOR_BLOCK(EMITTER, NAME, P, U, N, W) \
DO_8(DECLARE_INSTRUCTION_ARM(EMITTER, NAME)), \
DO_8(DECLARE_INSTRUCTION_ARM(EMITTER, NAME))
#define DECLARE_ARM_COPROCESSOR_BLOCK(EMITTER, NAME1, NAME2) \
DO_8(DO_8(DO_INTERLACE(0, 0))), \
DO_8(DO_8(DO_INTERLACE(0, 0)))
DO_8(DO_8(DO_INTERLACE(DECLARE_INSTRUCTION_ARM(EMITTER, NAME1), DECLARE_INSTRUCTION_ARM(EMITTER, NAME2))))
#define DECLARE_ARM_SWI_BLOCK(EMITTER) \
DO_256(DECLARE_INSTRUCTION_ARM(EMITTER, SWI))
@ -1125,6 +1132,7 @@ DEFINE_INSTRUCTION_ARM(SWI, cpu->board->swi32(cpu->board, opcode & 0xFFFFFF))
DECLARE_ARM_LOAD_STORE_COPROCESSOR_BLOCK(EMITTER, STC, P, U, N, W), \
DECLARE_ARM_LOAD_STORE_COPROCESSOR_BLOCK(EMITTER, LDC, P, U, N, W), \
DECLARE_ARM_COPROCESSOR_BLOCK(EMITTER, CDP, MCR), \
DECLARE_ARM_COPROCESSOR_BLOCK(EMITTER, CDP, MRC), \
DECLARE_ARM_SWI_BLOCK(EMITTER)
static const ARMInstruction _armTable[0x1000] = {

1
src/arm/isa-inlines.h
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@ -64,6 +64,7 @@
}
#define ARM_STUB cpu->board->hitStub(cpu->board, opcode)
#define ARM_ILL cpu->board->hitIllegal(cpu->board, opcode)
#define ARM_WRITE_PC \
cpu->gprs[ARM_PC] = (cpu->gprs[ARM_PC] & -WORD_SIZE_ARM) + WORD_SIZE_ARM; \

4
src/arm/isa-thumb.c
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@ -448,7 +448,7 @@ DEFINE_LOAD_STORE_MULTIPLE_EX_THUMB(PUSHR,
THUMB_STORE_POST_BODY,
cpu->gprs[ARM_SP] = address + 4)
DEFINE_INSTRUCTION_THUMB(ILL, ARM_STUB)
DEFINE_INSTRUCTION_THUMB(ILL, ARM_ILL)
DEFINE_INSTRUCTION_THUMB(BKPT, ARM_STUB)
DEFINE_INSTRUCTION_THUMB(B,
int16_t immediate = (opcode & 0x07FF) << 5;
@ -589,7 +589,7 @@ DEFINE_INSTRUCTION_THUMB(SWI, cpu->board->swi16(cpu->board, opcode & 0xFF))
DO_8(DO_4(DECLARE_INSTRUCTION_THUMB(EMITTER, B))), \
DO_8(DO_4(DECLARE_INSTRUCTION_THUMB(EMITTER, ILL))), \
DO_8(DO_4(DECLARE_INSTRUCTION_THUMB(EMITTER, BL1))), \
DO_8(DO_4(DECLARE_INSTRUCTION_THUMB(EMITTER, BL2))) \
DO_8(DO_4(DECLARE_INSTRUCTION_THUMB(EMITTER, BL2)))
static const ThumbInstruction _thumbTable[0x400] = {
DECLARE_THUMB_EMITTER_BLOCK(_ThumbInstruction)

11
src/gba/gba.c
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@ -97,6 +97,7 @@ static const struct GBACartridgeOverride _overrides[] = {
static void GBAProcessEvents(struct ARMBoard* board);
static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
static void GBAHitStub(struct ARMBoard* board, uint32_t opcode);
static void GBAIllegal(struct ARMBoard* board, uint32_t opcode);
static void _checkOverrides(struct GBA* gba, uint32_t code);
@ -146,6 +147,7 @@ void GBABoardInit(struct GBABoard* board) {
board->d.processEvents = GBAProcessEvents;
board->d.swi16 = GBASwi16;
board->d.swi32 = GBASwi32;
board->d.hitIllegal = GBAIllegal;
board->d.readCPSR = GBATestIRQ;
board->d.hitStub = GBAHitStub;
}
@ -528,7 +530,16 @@ void GBAHitStub(struct ARMBoard* board, uint32_t opcode) {
#else
abort();
#endif
}
void GBAIllegal(struct ARMBoard* board, uint32_t opcode) {
struct GBABoard* gbaBoard = (struct GBABoard*) board;
GBALog(gbaBoard->p, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
#ifdef USE_DEBUGGER
if (gbaBoard->p->debugger) {
ARMDebuggerEnter(gbaBoard->p->debugger);
}
#endif
}
void _checkOverrides(struct GBA* gba, uint32_t id) {