void link(CompilerState& state, const LinkDesc& desc)
{
StackMaps sm;
DataView dv(state.m_stackMapsSection->data());
sm.parse(&dv);
auto rm = sm.computeRecordMap();
EMASSERT(state.m_codeSectionList.size() == 1);
uint8_t* prologue = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(state.m_codeSectionList.front().data()));
uint8_t* body = static_cast<uint8_t*>(state.m_entryPoint);
desc.m_patchPrologue(desc.m_opaque, prologue);
for (auto& record : rm) {
EMASSERT(record.second.size() == 1);
auto found = state.m_patchMap.find(record.first);
if (found == state.m_patchMap.end()) {
// should be the tcg helpers.
continue;
}
PatchDesc& patchDesc = found->second;
switch (patchDesc.m_type) {
case PatchType::Assist: {
desc.m_patchAssist(desc.m_opaque, body + record.second[0].instructionOffset, desc.m_dispAssist);
} break;
case PatchType::TcgDirect: {
auto& recordUnit = record.second[0];
desc.m_patchTcgDirect(desc.m_opaque, body + recordUnit.instructionOffset, desc.m_dispTcgDirect);
} break;
case PatchType::TcgIndirect: {
auto& recordUnit = record.second[0];
desc.m_patchTcgIndirect(desc.m_opaque, body + recordUnit.instructionOffset, desc.m_dispTcgIndirect);
} break;
default:
EMUNREACHABLE();
}
}
}
void Output::buildTcgIndirectPatch(void)
{
PatchDesc desc = { PatchType::TcgIndirect };
LValue call = buildCall(repo().patchpointVoidIntrinsic(), constInt64(m_stackMapsId), constInt32(m_state.m_platformDesc.m_tcgSize), constNull(repo().ref8), constInt32(0));
llvmAPI->SetInstructionCallConv(call, LLVMAnyRegCallConv);
buildUnreachable(m_builder);
// record the stack map info
auto result = m_state.m_patchMap.insert(std::make_pair(m_stackMapsId++, desc));
EMASSERT(result.second == true);
m_currentBlockTerminated = true;
}
void LLVMDisasContext::link()
{
StackMaps sm;
const LinkDesc desc = {
nullptr,
m_dispDirect,
m_dispIndirect,
patchProloge,
patchDirect,
patchIndirect,
};
DataView dv(state()->m_stackMapsSection->data());
sm.parse(&dv);
auto rm = sm.computeRecordMap();
EMASSERT(state()->m_codeSectionList.size() == 1);
uint8_t* prologue = state()->m_codeSectionList.front();
uint8_t* body = static_cast<uint8_t*>(state()->m_entryPoint);
desc.m_patchPrologue(desc.m_opaque, prologue);
for (auto& record : rm) {
auto found = state()->m_patchMap.find(record.first);
if (found == state()->m_patchMap.end()) {
// should be the tcg helpers.
continue;
}
PatchDesc& patchDesc = found->second;
switch (patchDesc.m_type) {
case PatchType::TcgDirect: {
for (auto& recordUnit : record.second) {
desc.m_patchTcgDirect(desc.m_opaque, body + recordUnit.instructionOffset, desc.m_dispTcgDirect);
}
} break;
case PatchType::TcgIndirect: {
for (auto& recordUnit : record.second) {
desc.m_patchTcgIndirect(desc.m_opaque, body + recordUnit.instructionOffset, desc.m_dispTcgIndirect);
}
} break;
default:
EMUNREACHABLE();
}
}
}
