void Jit::CallProtectedFunction(void *func, const OpArg &arg1, const u32 arg2, const u32 arg3)
{
// On x64, we need to save R8, which is caller saved.
ABI_CallFunction((void *)thunks.GetSaveRegsFunction());
ABI_CallFunctionACC(func, arg1, arg2, arg3);
ABI_CallFunction((void *)thunks.GetLoadRegsFunction());
}
bool Jit::CheckJitBreakpoint(u32 addr, int downcountOffset)
{
if (CBreakPoints::IsAddressBreakPoint(addr))
{
SAVE_FLAGS;
FlushAll();
MOV(32, M(&mips_->pc), Imm32(js.compilerPC));
ABI_CallFunction(&JitBreakpoint);
// If 0, the conditional breakpoint wasn't taken.
CMP(32, R(EAX), Imm32(0));
FixupBranch skip = J_CC(CC_Z);
WriteDowncount(downcountOffset);
// Just to fix the stack.
LOAD_FLAGS;
JMP(asm_.dispatcherCheckCoreState, true);
SetJumpTarget(skip);
LOAD_FLAGS;
return true;
}
return false;
}
void Jit::WriteSyscallExit()
{
WriteDowncount();
if (js.afterOp & JitState::AFTER_MEMCHECK_CLEANUP) {
ABI_CallFunction(&JitMemCheckCleanup);
}
JMP(asm_.dispatcherCheckCoreState, true);
}
void Jit::Comp_ReplacementFunc(MIPSOpcode op)
{
// We get here if we execute the first instruction of a replaced function. This means
// that we do need to return to RA.
// Inlined function calls (caught in jal) are handled differently.
int index = op.encoding & MIPS_EMUHACK_VALUE_MASK;
const ReplacementTableEntry *entry = GetReplacementFunc(index);
if (!entry) {
ERROR_LOG(HLE, "Invalid replacement op %08x", op.encoding);
return;
}
if (entry->flags & REPFLAG_DISABLED) {
MIPSCompileOp(Memory::Read_Instruction(js.compilerPC, true));
} else if (entry->jitReplaceFunc) {
MIPSReplaceFunc repl = entry->jitReplaceFunc;
int cycles = (this->*repl)();
if (entry->flags & (REPFLAG_HOOKENTER | REPFLAG_HOOKEXIT)) {
// Compile the original instruction at this address. We ignore cycles for hooks.
MIPSCompileOp(Memory::Read_Instruction(js.compilerPC, true));
} else {
FlushAll();
MOV(32, R(ECX), M(¤tMIPS->r[MIPS_REG_RA]));
js.downcountAmount += cycles;
WriteExitDestInReg(ECX);
js.compiling = false;
}
} else if (entry->replaceFunc) {
FlushAll();
// Standard function call, nothing fancy.
// The function returns the number of cycles it took in EAX.
MOV(32, M(&mips_->pc), Imm32(js.compilerPC));
ABI_CallFunction(entry->replaceFunc);
if (entry->flags & (REPFLAG_HOOKENTER | REPFLAG_HOOKEXIT)) {
// Compile the original instruction at this address. We ignore cycles for hooks.
MIPSCompileOp(Memory::Read_Instruction(js.compilerPC, true));
} else {
MOV(32, R(ECX), M(¤tMIPS->r[MIPS_REG_RA]));
SUB(32, M(¤tMIPS->downcount), R(EAX));
WriteExitDestInReg(ECX);
js.compiling = false;
}
} else {
ERROR_LOG(HLE, "Replacement function %s has neither jit nor regular impl", entry->name);
}
}
bool Jit::ReplaceJalTo(u32 dest) {
MIPSOpcode op(Memory::Read_Opcode_JIT(dest));
if (!MIPS_IS_REPLACEMENT(op.encoding))
return false;
int index = op.encoding & MIPS_EMUHACK_VALUE_MASK;
const ReplacementTableEntry *entry = GetReplacementFunc(index);
if (!entry) {
ERROR_LOG(HLE, "ReplaceJalTo: Invalid replacement op %08x at %08x", op.encoding, dest);
return false;
}
if (entry->flags & (REPFLAG_HOOKENTER | REPFLAG_HOOKEXIT | REPFLAG_DISABLED)) {
// If it's a hook, we can't replace the jal, we have to go inside the func.
return false;
}
// Warning - this might be bad if the code at the destination changes...
if (entry->flags & REPFLAG_ALLOWINLINE) {
// Jackpot! Just do it, no flushing. The code will be entirely inlined.
// First, compile the delay slot. It's unconditional so no issues.
CompileDelaySlot(DELAYSLOT_NICE);
// Technically, we should write the unused return address to RA, but meh.
MIPSReplaceFunc repl = entry->jitReplaceFunc;
int cycles = (this->*repl)();
js.downcountAmount += cycles;
} else {
gpr.SetImm(MIPS_REG_RA, js.compilerPC + 8);
CompileDelaySlot(DELAYSLOT_NICE);
FlushAll();
MOV(32, M(&mips_->pc), Imm32(js.compilerPC));
ABI_CallFunction(entry->replaceFunc);
SUB(32, M(¤tMIPS->downcount), R(EAX));
}
js.compilerPC += 4;
// No writing exits, keep going!
// Add a trigger so that if the inlined code changes, we invalidate this block.
// TODO: Correctly determine the size of this block.
blocks.ProxyBlock(js.blockStart, dest, 4, GetCodePtr());
return true;
}