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unaligned jump exceptions handled properly now

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This commit is contained in:
SimoneN64
2023-09-09 07:19:55 +02:00
parent f143da561b
commit b14977547d
3 changed files with 15 additions and 17 deletions
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6
src/backend/core/Interpreter.cpp
View File

@@ -7,6 +7,12 @@ int Interpreter::Step() {
regs.prevDelaySlot = regs.delaySlot;
regs.delaySlot = false;
if(check_address_error(0b11, u64(regs.pc))) [[unlikely]] {
HandleTLBException(regs, regs.pc);
FireException(regs, ExceptionCode::AddressErrorLoad, 0, false);
return 1;
}
u32 paddr = 0;
if(!MapVAddr(regs, LOAD, regs.pc, paddr)) {
HandleTLBException(regs, regs.pc);

1
src/backend/core/Interpreter.hpp
View File

@@ -12,6 +12,7 @@ struct Interpreter : BaseCPU {
private:
u64 cop2Latch{};
friend struct Cop1;
#define check_address_error(mask, vaddr) (((!regs.cop0.is_64bit_addressing) && (s32)(vaddr) != (vaddr)) || (((vaddr) & (mask)) != 0))
[[nodiscard]] FORCE_INLINE bool ShouldServiceInterrupt() override {
bool interrupts_pending = (regs.cop0.status.im & regs.cop0.cause.interruptPending) != 0;

17
src/backend/core/interpreter/instructions.cpp
View File

@@ -1,6 +1,5 @@
#include <core/Interpreter.hpp>
#define check_address_error(mask, vaddr) (((!regs.cop0.is_64bit_addressing) && (s32)(vaddr) != (vaddr)) || (((vaddr) & (mask)) != 0))
#define check_signed_overflow(op1, op2, res) (((~((op1) ^ (op2)) & ((op1) ^ (res))) >> ((sizeof(res) * 8) - 1)) & 1)
#define check_signed_underflow(op1, op2, res) (((((op1) ^ (op2)) & ((op1) ^ (res))) >> ((sizeof(res) * 8) - 1)) & 1)
@@ -663,14 +662,15 @@ void Interpreter::jal(u32 instr) {
void Interpreter::jalr(u32 instr) {
u64 addr = regs.gpr[RS(instr)];
if(check_address_error(0b11, addr)) {
FireException(regs, ExceptionCode::AddressErrorLoad, 0, true);
} else {
branch(true, addr);
if (RD(instr) != 0) [[likely]] {
regs.gpr[RD(instr)] = regs.pc + 4;
}
}
void Interpreter::jr(u32 instr) {
u64 address = regs.gpr[RS(instr)];
branch(true, address);
}
void Interpreter::slti(u32 instr) {
@@ -858,15 +858,6 @@ void Interpreter::dsra32(u32 instr) {
}
}
void Interpreter::jr(u32 instr) {
s64 address = regs.gpr[RS(instr)];
if(check_address_error(0b11, address)) {
FireException(regs, ExceptionCode::AddressErrorLoad, 0, true);
} else {
branch(true, address);
}
}
void Interpreter::dsub(u32 instr) {
s64 rt = regs.gpr[RT(instr)];
s64 rs = regs.gpr[RS(instr)];