vmp2
/
vmdevirt
3
0
Fork 0
Code Issues 1 Pull Requests Projects Releases Wiki Activity

added more lifters...

Browse Source
merge-requests/12/head
_xeroxz 3 years ago
parent d2da38cad1
commit b82072e2ed
6 changed files with 110 additions and 2 deletions
Show Stats Download Patch File Download Diff File

3
CMakeLists.txt
Unescape View File

@ -44,6 +44,7 @@ list(APPEND vmdevirt_SOURCES
"src/devirt_utils.cpp"
"src/lifters/add.cpp"
"src/lifters/div.cpp"
"src/lifters/idiv.cpp"
"src/lifters/imul.cpp"
"src/lifters/jmp.cpp"
"src/lifters/lconst.cpp"
@ -54,6 +55,7 @@ list(APPEND vmdevirt_SOURCES
"src/lifters/popvsp.cpp"
"src/lifters/pushvsp.cpp"
"src/lifters/read.cpp"
"src/lifters/readcr3.cpp"
"src/lifters/readcr8.cpp"
"src/lifters/readgs.cpp"
"src/lifters/sflags.cpp"
@ -64,6 +66,7 @@ list(APPEND vmdevirt_SOURCES
"src/lifters/sreg.cpp"
"src/lifters/vmexit.cpp"
"src/lifters/write.cpp"
"src/lifters/writecr3.cpp"
"src/main.cpp"
"src/vmp_rtn_t.cpp"
"include/devirt_t.hpp"

9
include/vm_lifters.hpp
Unescape View File

@ -44,13 +44,16 @@ namespace vm
static lifter_callback_t shrq, shrdw, shrw;
static lifter_callback_t shlq, shldw;
static lifter_callback_t shlddw;
static lifter_callback_t shrdq;
static lifter_callback_t shrdq, shrddw;
static lifter_callback_t jmp;
static lifter_callback_t lflagsq;
static lifter_callback_t vmexit;
static lifter_callback_t readcr8;
static lifter_callback_t readcr3;
static lifter_callback_t writecr3;
static lifter_callback_t readgsq;
static lifter_callback_t divdw;
static lifter_callback_t idivdw;
std::map< vm::handler::mnemonic_t, lifter_callback_t * > lifters = { { vm::handler::LCONSTQ, &lconstq },
{ vm::handler::LCONSTDW, &lconstdw },
@ -62,6 +65,7 @@ namespace vm
{ vm::handler::LCONSTWSXDW, &lconstwsxdw },
{ vm::handler::LCONSTBSXDW, &lconstbsxdw },
{ vm::handler::DIVDW, &divdw },
{ vm::handler::IDIVDW, &idivdw },
{ vm::handler::ADDQ, &addq },
{ vm::handler::ADDDW, &adddw },
{ vm::handler::ADDW, &addw },
@ -73,6 +77,7 @@ namespace vm
{ vm::handler::SHLDW, &shldw },
{ vm::handler::SHLDDW, &shlddw },
{ vm::handler::SHRDQ, &shrdq },
{ vm::handler::SHRDDW, &shrddw },
{ vm::handler::IMULQ, &imulq },
{ vm::handler::IMULDW, &imuldw },
{ vm::handler::MULQ, &mulq },
@ -98,6 +103,8 @@ namespace vm
{ vm::handler::NANDB, &nandb },
{ vm::handler::LFLAGSQ, &lflagsq },
{ vm::handler::READCR8, &readcr8 },
{ vm::handler::READCR3, &readcr3 },
{ vm::handler::WRITECR3, &writecr3 },
{ vm::handler::READGSQ, &readgsq },
{ vm::handler::JMP, &jmp },
{ vm::handler::VMEXIT, &vmexit } };

20
src/lifters/idiv.cpp
Unescape View File

@ -0,0 +1,20 @@
#include <vm_lifters.hpp>
namespace vm
{
lifters_t::lifter_callback_t lifters_t::idivdw =
[ & ]( 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 );
// TODO: this is wrong...
ir_builder->CreateUDiv( t1, t2 );
rtn->push( 4, t1 );
rtn->push( 4, t2 );
auto &vmp_rtn = rtn->vmp_rtns.back();
// TODO: compute flags...
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
}

30
src/lifters/readcr3.cpp
Unescape View File

@ -0,0 +1,30 @@
#include <vm_lifters.hpp>
namespace vm
{
lifters_t::lifter_callback_t lifters_t::readcr3 =
[ & ]( 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 *readcr3_intrin = nullptr;
if ( !( readcr3_intrin = rtn->llvm_module->getFunction( "readcr3" ) ) )
{
readcr3_intrin = llvm::Function::Create( llvm::FunctionType::get( ir_builder->getInt64Ty(), false ),
llvm::GlobalValue::LinkageTypes::ExternalLinkage, "readcr3",
*rtn->llvm_module );
auto entry_block = llvm::BasicBlock::Create( ir_builder->getContext(), "", readcr3_intrin );
auto ib = ir_builder->GetInsertBlock();
ir_builder->SetInsertPoint( entry_block );
std::string asm_str( "mov rax, cr3; 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 = ir_builder->CreateCall( readcr3_intrin );
rtn->push( 8, t1 );
};
}

19
src/lifters/shrd.cpp
Unescape View File

@ -18,4 +18,21 @@ namespace vm
// TODO: update rflags...
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
}
lifters_t::lifter_callback_t lifters_t::shrddw =
[ & ]( 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 = rtn->pop( 2 );
// TODO: this is wrong - replace with more logic!
auto t4 = ir_builder->CreateLShr( t1, ir_builder->CreateIntCast( t3, ir_builder->getInt32Ty(), false ) );
rtn->push( 4, t4 );
auto &vmp_rtn = rtn->vmp_rtns.back();
// TODO: update rflags...
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
} // namespace vm

31
src/lifters/writecr3.cpp
Unescape View File

@ -0,0 +1,31 @@
#include <vm_lifters.hpp>
namespace vm
{
lifters_t::lifter_callback_t lifters_t::writecr3 =
[ & ]( 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 *writecr3_intrin = nullptr;
if ( !( writecr3_intrin = rtn->llvm_module->getFunction( "writecr3" ) ) )
{
writecr3_intrin = llvm::Function::Create(
llvm::FunctionType::get( ir_builder->getVoidTy(), { ir_builder->getInt64Ty() }, false ),
llvm::GlobalValue::LinkageTypes::ExternalLinkage, "writecr3", *rtn->llvm_module );
auto entry_block = llvm::BasicBlock::Create( ir_builder->getContext(), "", writecr3_intrin );
auto ib = ir_builder->GetInsertBlock();
ir_builder->SetInsertPoint( entry_block );
std::string asm_str( "mov cr3, 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->CreateRetVoid();
ir_builder->SetInsertPoint( ib );
}
auto t1 = rtn->pop( 8 );
ir_builder->CreateCall( writecr3_intrin, { t1 } );
};
}
Write Preview
Loading…
Cancel
Save