vmp3
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vmemu
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made it so that branching data is better 4 lifting

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pull/1/head
xtremegamer1 2 years ago
parent aa99328820
commit 93d03c0fb5
2 changed files with 7 additions and 12 deletions
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2
deps/vmprofiler vendored

@ -1 +1 @@
Subproject commit 63c10f71dd5c96c6b2a96f5ae5b7fd2a93fa07f3 Subproject commit d63f9b1af1b2eb42334f4c34a594f7faabd20903

15
src/vmemu_t.cpp
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@ -65,10 +65,6 @@ bool emu_t::init() {
} }
bool emu_t::emulate(std::uint32_t vmenter_rva, vm::instrs::vrtn_t& vrtn) { bool emu_t::emulate(std::uint32_t vmenter_rva, vm::instrs::vrtn_t& vrtn) {
static int vmenter_number = 0;
std::printf("\n[%.4d] STARTING FROM NEW VMENTER AT %p (%p)\n\n", vmenter_number++,
vmenter_rva + m_vm->m_module_base,
vmenter_rva + m_vm->m_image_base);
uc_err err; uc_err err;
vrtn.m_rva = vmenter_rva; vrtn.m_rva = vmenter_rva;
@ -128,6 +124,7 @@ bool emu_t::emulate(std::uint32_t vmenter_rva, vm::instrs::vrtn_t& vrtn) {
auto& new_blk = vrtn.m_blks.emplace_back(); auto& new_blk = vrtn.m_blks.emplace_back();
new_blk.m_vip = {0ull, 0ull}; new_blk.m_vip = {0ull, 0ull};
new_blk.m_vm = {blk.m_jmp.m_vm.vip, blk.m_jmp.m_vm.vsp}; new_blk.m_vm = {blk.m_jmp.m_vm.vip, blk.m_jmp.m_vm.vsp};
new_blk.is_branch = true;
cc_blk = &new_blk; cc_blk = &new_blk;
// emulate the branch... // emulate the branch...
@ -176,7 +173,6 @@ void emu_t::extract_branch_data() {
br1 += m_vm->m_module_base; br1 += m_vm->m_module_base;
br2 += m_vm->m_module_base; br2 += m_vm->m_module_base;
// We need to handle the case that the jump points to another jump
auto br1_legit = legit_branch(*cc_blk, br1); auto br1_legit = legit_branch(*cc_blk, br1);
auto br2_legit = legit_branch(*cc_blk, br2); auto br2_legit = legit_branch(*cc_blk, br2);
std::printf("> br1 legit: %d, br2 legit: %d\n", br1_legit, br2_legit); std::printf("> br1 legit: %d, br2 legit: %d\n", br1_legit, br2_legit);
@ -416,7 +412,7 @@ bool emu_t::code_exec_callback(uc_engine* uc, uint64_t address, uint32_t size,
uc_context* backup; uc_context* backup;
uct_context_alloc(uc, &backup); uct_context_alloc(uc, &backup);
uc_context_save(uc, backup); uc_context_save(uc, backup);
uc_context_restore(uc, (--vip_write)->m_cpu); uc_context_restore(uc, vip_write->m_cpu);
std::uintptr_t vip_addr = 0ull; std::uintptr_t vip_addr = 0ull;
uc_reg_read(uc, vm::instrs::reg_map[obj->cc_trace.m_vip], &vip_addr); uc_reg_read(uc, vm::instrs::reg_map[obj->cc_trace.m_vip], &vip_addr);
@ -461,8 +457,8 @@ bool emu_t::code_exec_callback(uc_engine* uc, uint64_t address, uint32_t size,
uc_emu_stop(uc); uc_emu_stop(uc);
return false; return false;
} }
//I don't think this if statement is neccesary
if (obj->cc_blk->m_vinstrs.size()) { //if (obj->cc_blk->m_vinstrs.size()) {
if (vinstr.mnemonic == vm::instrs::mnemonic_t::jmp) { if (vinstr.mnemonic == vm::instrs::mnemonic_t::jmp) {
uc_context *backup, *copy; uc_context *backup, *copy;
@ -491,8 +487,7 @@ bool emu_t::code_exec_callback(uc_engine* uc, uint64_t address, uint32_t size,
if (vinstr.mnemonic == vm::instrs::mnemonic_t::jmp || if (vinstr.mnemonic == vm::instrs::mnemonic_t::jmp ||
vinstr.mnemonic == vm::instrs::mnemonic_t::vmexit) vinstr.mnemonic == vm::instrs::mnemonic_t::vmexit)
uc_emu_stop(obj->uc); uc_emu_stop(obj->uc);
} //}
obj->cc_blk->m_vinstrs.push_back(vinstr); obj->cc_blk->m_vinstrs.push_back(vinstr);
} }

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