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added more lifters... updated vmprofiler dep...

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merge-requests/12/head
_xeroxz 3 years ago
parent 661bc3bc16
commit 4fe8c63f49
8 changed files with 74 additions and 10 deletions
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1
CMakeLists.txt
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@ -44,6 +44,7 @@ list(APPEND vmdevirt_SOURCES
"src/devirt_utils.cpp"
"src/lifters/add.cpp"
"src/lifters/div.cpp"
"src/lifters/imul.cpp"
"src/lifters/jmp.cpp"
"src/lifters/lconst.cpp"
"src/lifters/lflags.cpp"

2
dependencies/vmprofiler vendored

@ -1 +1 @@
Subproject commit 7b1f815a73096ac33f41133b63d991019622de49
Subproject commit 1b6875d18825529907289bc87990fed5d99e7f96

8
include/vm_lifters.hpp
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@ -35,10 +35,11 @@ namespace vm
static lifter_callback_t sregq, sregdw, sregb;
static lifter_callback_t lregq, lregdw;
static lifter_callback_t imulq;
static lifter_callback_t pushvsp;
static lifter_callback_t popvsp;
static lifter_callback_t writeq;
static lifter_callback_t readq, readdw;
static lifter_callback_t writeq, writedw;
static lifter_callback_t readq, readdw, readb;
static lifter_callback_t nandq, nanddw, nandb;
static lifter_callback_t shrq;
static lifter_callback_t jmp;
@ -57,6 +58,7 @@ namespace vm
{ vm::handler::ADDDW, &adddw },
{ vm::handler::ADDW, &addw },
{ vm::handler::SHRQ, &shrq },
{ vm::handler::IMULQ, &imulq },
{ vm::handler::PUSHVSP, &pushvsp },
{ vm::handler::POPVSP, &popvsp },
{ vm::handler::SREGQ, &sregq },
@ -66,7 +68,9 @@ namespace vm
{ vm::handler::LREGDW, &lregdw },
{ vm::handler::READQ, &readq },
{ vm::handler::READDW, &readdw },
{ vm::handler::READB, &readb },
{ vm::handler::WRITEQ, &writeq },
{ vm::handler::WRITEDW, &writedw },
{ vm::handler::NANDQ, &nandq },
{ vm::handler::NANDDW, &nanddw },
{ vm::handler::NANDB, &nandb },

22
src/lifters/imul.cpp
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@ -0,0 +1,22 @@
#include <vm_lifters.hpp>
// https://lists.llvm.org/pipermail/llvm-dev/2014-July/074685.html
// credit to James Courtier-Dutton for asking this question in 2014...
namespace vm
{
lifters_t::lifter_callback_t lifters_t::imulq =
[ & ]( 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->CreateMul( t1, t2 );
auto t4 = ir_builder->CreateAShr( t3, llvm::APInt( 64, 32 ) );
auto t5 = ir_builder->CreateAnd( t3, 0xFFFFFFFF00000000 );
rtn->push( 8, t4 );
rtn->push( 8, t5 );
// TODO: compute flags for IMULQ
auto &vmp_rtn = rtn->vmp_rtns.back();
rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
};
}

18
src/lifters/jmp.cpp
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@ -9,7 +9,9 @@ namespace vm
" has_jcc = false... debug time!\n" );
auto &vmp_rtn = rtn->vmp_rtns.back();
if ( vm_code_block.jcc.type == vm::instrs::jcc_type::branching )
switch ( vm_code_block.jcc.type )
{
case vm::instrs::jcc_type::branching:
{
auto rva = rtn->pop( 8 );
auto b1 = vm_code_block.jcc.block_addr[ 0 ] & std::numeric_limits< std::uint32_t >::max();
@ -38,8 +40,9 @@ namespace vm
"[!] fatal error... unable to locate basic block for branching...\n" );
ir_builder->CreateCondBr( cmp, bb1->second, bb2->second );
break;
}
else
case vm::instrs::jcc_type::absolute:
{
auto rva = rtn->pop( 8 );
auto bb_data =
@ -52,6 +55,15 @@ namespace vm
"[!] fatal error... unable to locate basic block...\n" );
ir_builder->CreateBr( bb_data->second );
break;
}
case vm::instrs::jcc_type::switch_case:
{
// TODO: add switch case support here...
break;
}
default:
break;
}
};
}
} // namespace vm

6
src/lifters/mul.cpp
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@ -0,0 +1,6 @@
#include <vm_lifters.hpp>
namespace vm
{
}

18
src/lifters/read.cpp
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@ -3,8 +3,8 @@
namespace vm
{
lifters_t::lifter_callback_t lifters_t::readq =
[ & ]( 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 = ir_builder->CreateIntToPtr( t1, llvm::PointerType::get( ir_builder->getInt64Ty(), 0ull ) );
auto t3 = ir_builder->CreateLoad( ir_builder->getInt64Ty(), t2 );
@ -12,11 +12,21 @@ namespace vm
};
lifters_t::lifter_callback_t lifters_t::readdw =
[ & ]( 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 = ir_builder->CreateIntToPtr( t1, llvm::PointerType::get( ir_builder->getInt32Ty(), 0ull ) );
auto t3 = ir_builder->CreateLoad( ir_builder->getInt32Ty(), t2 );
rtn->push( 4, t3 );
};
lifters_t::lifter_callback_t lifters_t::readb =
[ & ]( 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 = ir_builder->CreateIntToPtr( t1, llvm::PointerType::get( ir_builder->getInt8Ty(), 0ull ) );
auto t3 = ir_builder->CreateLoad( ir_builder->getInt8Ty(), t2 );
auto t4 = ir_builder->CreateIntCast( t3, ir_builder->getInt16Ty(), false );
rtn->push( 2, t4 );
};
} // namespace vm

9
src/lifters/write.cpp
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@ -10,4 +10,13 @@ namespace vm
auto t3 = ir_builder->CreateIntToPtr( t1, llvm::PointerType::get( ir_builder->getInt64Ty(), 0ull ) );
ir_builder->CreateStore( t2, t3 );
};
lifters_t::lifter_callback_t lifters_t::writedw =
[ & ]( 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( 4 );
auto t3 = ir_builder->CreateIntToPtr( t1, llvm::PointerType::get( ir_builder->getInt32Ty(), 0ull ) );
ir_builder->CreateStore( t2, t3 );
};
} // namespace vm
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