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added more lifters

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merge-requests/12/head
_xeroxz 3 years ago
parent 93402767a9
commit ea078d9847
8 changed files with 127 additions and 17 deletions
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1
CMakeLists.txt
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@ -55,6 +55,7 @@ list(APPEND vmdevirt_SOURCES
"src/lifters/pushvsp.cpp"
"src/lifters/read.cpp"
"src/lifters/readcr8.cpp"
"src/lifters/readgs.cpp"
"src/lifters/sflags.cpp"
"src/lifters/shl.cpp"
"src/lifters/shr.cpp"

14
include/vm_lifters.hpp
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@ -31,21 +31,22 @@ namespace vm
static lifter_callback_t lconstq, lconstdwsxq, lconstwsxq, lconstbzxw, lconstbsxq, lconstwsxdw, lconstdw,
lconstbsxdw;
static lifter_callback_t addq, adddw, addw;
static lifter_callback_t addq, adddw, addw, addb;
static lifter_callback_t sregq, sregdw, sregb;
static lifter_callback_t lregq, lregdw;
static lifter_callback_t imulq;
static lifter_callback_t imulq, imuldw;
static lifter_callback_t pushvsp;
static lifter_callback_t popvsp;
static lifter_callback_t writeq, writedw;
static lifter_callback_t writeq, writedw, writeb;
static lifter_callback_t readq, readdw, readw, readb;
static lifter_callback_t nandq, nanddw, nandb;
static lifter_callback_t nandq, nanddw, nandw, nandb;
static lifter_callback_t shrq, shrdw;
static lifter_callback_t shlq;
static lifter_callback_t jmp;
static lifter_callback_t lflagsq;
static lifter_callback_t vmexit;
static lifter_callback_t readcr8;
static lifter_callback_t readgsq;
std::map< vm::handler::mnemonic_t, lifter_callback_t * > lifters = { { vm::handler::LCONSTQ, &lconstq },
{ vm::handler::LCONSTDW, &lconstdw },
@ -58,10 +59,12 @@ namespace vm
{ vm::handler::ADDQ, &addq },
{ vm::handler::ADDDW, &adddw },
{ vm::handler::ADDW, &addw },
{ vm::handler::ADDB, &addb },
{ vm::handler::SHRQ, &shrq },
{ vm::handler::SHRDW, &shrdw },
{ vm::handler::SHLQ, &shlq },
{ vm::handler::IMULQ, &imulq },
{ vm::handler::IMULDW, &imuldw },
{ vm::handler::PUSHVSPQ, &pushvsp },
{ vm::handler::POPVSPQ, &popvsp },
{ vm::handler::SREGQ, &sregq },
@ -75,11 +78,14 @@ namespace vm
{ vm::handler::READB, &readb },
{ vm::handler::WRITEQ, &writeq },
{ vm::handler::WRITEDW, &writedw },
{ vm::handler::WRITEB, &writeb },
{ vm::handler::NANDQ, &nandq },
{ vm::handler::NANDDW, &nanddw },
{ vm::handler::NANDW, &nandw },
{ vm::handler::NANDB, &nandb },
{ vm::handler::LFLAGSQ, &lflagsq },
{ vm::handler::READCR8, &readcr8 },
{ vm::handler::READGSQ, &readgsq },
{ vm::handler::JMP, &jmp },
{ vm::handler::VMEXIT, &vmexit } };

34
src/lifters/add.cpp
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@ -29,15 +29,15 @@ namespace vm
auto pf = llvm::ConstantInt::get( llvm::IntegerType::get( *rtn->llvm_ctx, 64 ),
0 ); // TODO make clean PF bit computation...
auto flags_calc = rtn->flags(
cf, pf, llvm::ConstantInt::get( llvm::IntegerType::get( *rtn->llvm_ctx, 64 ), 0 ), zf, sf, of );
auto flags_calc =
rtn->flags( cf, pf, llvm::ConstantInt::get( llvm::IntegerType::get( *rtn->llvm_ctx, 64 ), 0 ), zf, sf, of );
return flags_calc;
}
lifters_t::lifter_callback_t lifters_t::addq =
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block,
const vm::instrs::virt_instr_t &vinstr, llvm::IRBuilder<> *ir_builder ) {
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
llvm::IRBuilder<> *ir_builder ) {
auto t1 = rtn->pop( 8 );
auto t2 = rtn->pop( 8 );
auto t3 = ir_builder->CreateAdd( t1, t2 );
@ -50,8 +50,8 @@ namespace vm
};
lifters_t::lifter_callback_t lifters_t::adddw =
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block,
const vm::instrs::virt_instr_t &vinstr, llvm::IRBuilder<> *ir_builder ) {
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
llvm::IRBuilder<> *ir_builder ) {
auto t1 = rtn->pop( 4 );
auto t2 = rtn->pop( 4 );
auto t3 = ir_builder->CreateAdd( t1, t2 );
@ -64,8 +64,8 @@ namespace vm
};
lifters_t::lifter_callback_t lifters_t::addw =
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block,
const vm::instrs::virt_instr_t &vinstr, llvm::IRBuilder<> *ir_builder ) {
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
llvm::IRBuilder<> *ir_builder ) {
auto t1 = rtn->pop( 2 );
auto t2 = rtn->pop( 2 );
auto t3 = ir_builder->CreateAdd( t1, t2 );
@ -77,4 +77,22 @@ namespace vm
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
lifters_t::lifter_callback_t lifters_t::addb =
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
llvm::IRBuilder<> *ir_builder ) {
auto t1 = rtn->pop( 2 );
auto t2 = rtn->pop( 2 );
auto t3 = ir_builder->CreateIntCast( t1, ir_builder->getInt8Ty(), false );
auto t4 = ir_builder->CreateIntCast( t2, ir_builder->getInt8Ty(), false );
auto t5 = ir_builder->CreateAdd( t3, t4 );
rtn->push( 2, ir_builder->CreateIntCast( t5, ir_builder->getInt16Ty(), false ) );
auto &vmp_rtn = rtn->vmp_rtns.back();
auto flags = lifters_t::add_flags( rtn, 1, t3, t4 );
ir_builder->CreateStore( flags, vmp_rtn->flags );
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
} // namespace vm

23
src/lifters/imul.cpp
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@ -19,4 +19,25 @@ namespace vm
auto &vmp_rtn = rtn->vmp_rtns.back();
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
}
lifters_t::lifter_callback_t lifters_t::imuldw =
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
llvm::IRBuilder<> *ir_builder ) {
auto t1 = rtn->pop( 4 );
auto t2 = rtn->pop( 4 );
auto t3 = ir_builder->CreateIntCast( t1, ir_builder->getInt64Ty(), false );
auto t4 = ir_builder->CreateIntCast( t2, ir_builder->getInt64Ty(), false );
auto t5 = ir_builder->CreateMul( t3, t4 );
auto t6 = ir_builder->CreateAShr( t5, llvm::APInt( 64, 32 ) );
auto t7 = ir_builder->CreateAnd( t5, 0xFFFFFFFF00000000 );
rtn->push( 8, t6 );
rtn->push( 8, t7 );
// TODO: compute flags for IMULQ
auto &vmp_rtn = rtn->vmp_rtns.back();
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
} // namespace vm

18
src/lifters/nand.cpp
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@ -51,6 +51,24 @@ namespace vm
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
lifters_t::lifter_callback_t lifters_t::nandw =
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
llvm::IRBuilder<> *ir_builder ) {
auto t1 = rtn->pop( 2 );
auto t2 = rtn->pop( 2 );
auto t1_not = ir_builder->CreateNot( t1 );
auto t2_not = ir_builder->CreateNot( t2 );
auto t3 = ir_builder->CreateAnd( { t1_not, t2_not } );
rtn->push( 2, t3 );
auto &vmp_rtn = rtn->vmp_rtns.back();
auto flags = and_flags( rtn, 2, t3 );
ir_builder->CreateStore( flags, vmp_rtn->flags );
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
lifters_t::lifter_callback_t lifters_t::nandb =
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
llvm::IRBuilder<> *ir_builder ) {

12
src/lifters/readcr8.cpp
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@ -9,15 +9,19 @@ namespace vm
if ( !( readcr8_intrin = rtn->llvm_module->getFunction( "readcr8" ) ) )
{
readcr8_intrin = llvm::Function::Create( llvm::FunctionType::get( ir_builder->getInt64Ty(), false ),
llvm::GlobalValue::LinkageTypes::ExternalLinkage );
llvm::GlobalValue::LinkageTypes::ExternalLinkage, "readcr8",
*rtn->llvm_module );
auto entry_block = llvm::BasicBlock::Create( ir_builder->getContext(), "", readcr8_intrin );
auto ib = ir_builder->GetInsertBlock();
ir_builder->SetInsertPoint( entry_block );
auto intrin = llvm::InlineAsm::get( llvm::FunctionType::get( ir_builder->getVoidTy(), false ),
"mov rax, cr8; ret", "", false, false, llvm::InlineAsm::AD_Intel );
std::string asm_str( "mov rax, cr8; ret" );
auto intrin = llvm::InlineAsm::get( llvm::FunctionType::get( ir_builder->getVoidTy(), false ), asm_str,
"", false, false, llvm::InlineAsm::AD_Intel );
ir_builder->CreateCall( intrin );
ir_builder->CreateRetVoid(); // TODO: dont return VOID here...
ir_builder->CreateRet( llvm::ConstantInt::get( *rtn->llvm_ctx, llvm::APInt( 64, 0 ) ) );
ir_builder->SetInsertPoint( ib );
}
auto t1 = ir_builder->CreateCall( readcr8_intrin );

32
src/lifters/readgs.cpp
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@ -0,0 +1,32 @@
#include <vm_lifters.hpp>
namespace vm
{
lifters_t::lifter_callback_t lifters_t::readgsq =
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
llvm::IRBuilder<> *ir_builder ) {
llvm::Function *readgs_intrin = nullptr;
if ( !( readgs_intrin = rtn->llvm_module->getFunction( "readgs" ) ) )
{
readgs_intrin = llvm::Function::Create(
llvm::FunctionType::get( ir_builder->getInt64Ty(), { ir_builder->getInt64Ty() }, false ),
llvm::GlobalValue::LinkageTypes::ExternalLinkage, "readgs", *rtn->llvm_module );
auto entry_block = llvm::BasicBlock::Create( ir_builder->getContext(), "", readgs_intrin );
auto ib = ir_builder->GetInsertBlock();
ir_builder->SetInsertPoint( entry_block );
std::string asm_str( "mov rax, gs:[rcx]; ret" );
auto intrin = llvm::InlineAsm::get( llvm::FunctionType::get( ir_builder->getVoidTy(), false ), asm_str,
"", false, false, llvm::InlineAsm::AD_Intel );
ir_builder->CreateCall( intrin );
ir_builder->CreateRet( llvm::ConstantInt::get( *rtn->llvm_ctx, llvm::APInt( 64, 0 ) ) );
ir_builder->SetInsertPoint( ib );
}
auto t1 = rtn->pop( 8 );
auto t2 = ir_builder->CreateCall( readgs_intrin, { t1 } );
rtn->push( 8, t2 );
};
} // namespace vm

10
src/lifters/write.cpp
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@ -19,4 +19,14 @@ namespace vm
auto t3 = ir_builder->CreateIntToPtr( t1, llvm::PointerType::get( ir_builder->getInt32Ty(), 0ull ) );
ir_builder->CreateStore( t2, t3 );
};
lifters_t::lifter_callback_t lifters_t::writeb =
[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
llvm::IRBuilder<> *ir_builder ) {
auto t1 = rtn->pop( 8 );
auto t2 = rtn->pop( 2 );
auto t3 = ir_builder->CreateIntToPtr( t1, llvm::PointerType::get( ir_builder->getInt8Ty(), 0ull ) );
auto t4 = ir_builder->CreateIntCast( t2, ir_builder->getInt8Ty(), false );
ir_builder->CreateStore( t4, t3 );
};
} // namespace vm
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