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updates templates and vm impls for better LAST_BRANCH handling

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Eyck-Alexander Jentzsch
2024-07-22 09:04:17 +02:00
parent 4f5d9214ed
commit 0432803d82
6 changed files with 103 additions and 54 deletions
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4
gen_input/templates/llvm/CORENAME.cpp.gtl
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@ -338,7 +338,7 @@ template <typename ARCH>
void vm_impl<ARCH>::gen_leave_trap(unsigned lvl) {
std::vector<Value *> args{ this->core_ptr, ConstantInt::get(getContext(), APInt(64, lvl)) };
this->builder.CreateCall(this->mod->getFunction("leave_trap"), args);
this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()), get_reg_ptr(traits::LAST_BRANCH), false);
this->builder.CreateStore(this->gen_const(32U, static_cast<int>(UNKNOWN_JUMP)), get_reg_ptr(traits::LAST_BRANCH), false);
}
template <typename ARCH>
@ -366,7 +366,7 @@ void vm_impl<ARCH>::gen_trap_behavior(BasicBlock *trap_blk) {
this->adj_to64(cur_pc_val),
this->adj_to64(this->builder.CreateLoad(this->get_type(64),this->tval))};
this->builder.CreateCall(this->mod->getFunction("enter_trap"), args);
this->builder.CreateStore(this->gen_const(32U, std::numeric_limits<uint32_t>::max()), get_reg_ptr(traits::LAST_BRANCH), false);
this->builder.CreateStore(this->gen_const(32U, static_cast<int>(UNKNOWN_JUMP)), get_reg_ptr(traits::LAST_BRANCH), false);
auto *trap_addr_val = this->builder.CreateLoad(this->get_typeptr(traits::NEXT_PC), get_reg_ptr(traits::NEXT_PC), false);
this->builder.CreateRet(trap_addr_val);