added more doxygen comments...

merge-requests/11/head
_xeroxz 3 years ago
parent 08635457a7
commit 3276cc96d0

@ -4,6 +4,9 @@
#include <vmhandlers.hpp> #include <vmhandlers.hpp>
#include <vmp2.hpp> #include <vmp2.hpp>
/// <summary>
/// contains all functions related to virtual instructions...
/// </summary>
namespace vm::instrs namespace vm::instrs
{ {
/// <summary> /// <summary>
@ -48,7 +51,7 @@ namespace vm::instrs
std::optional< virt_instr_t > get( vm::ctx_t &ctx, vmp2::v2::entry_t &entry ); std::optional< virt_instr_t > get( vm::ctx_t &ctx, vmp2::v2::entry_t &entry );
/// <summary> /// <summary>
/// gets the second operand (imm) given vip and vm::ctx_t... /// gets the encrypted second operand (imm) given vip and vm::ctx_t...
/// </summary> /// </summary>
/// <param name="ctx">vm context</param> /// <param name="ctx">vm context</param>
/// <param name="imm_size">immediate value size in bits...</param> /// <param name="imm_size">immediate value size in bits...</param>

@ -28,22 +28,78 @@ struct zydis_instr_t
using zydis_routine_t = std::vector< zydis_instr_t >; using zydis_routine_t = std::vector< zydis_instr_t >;
/// <summary>
/// utils used by the other cpp files... misc things that get used a lot...
/// </summary>
namespace vm::util namespace vm::util
{ {
/// <summary>
/// utils pertaining to native registers...
/// </summary>
namespace reg namespace reg
{ {
// converts say... AL to RAX... /// <summary>
/// converts say... AL to RAX...
/// </summary>
/// <param name="reg">a zydis decoded register value...</param>
/// <returns>returns the largest width register of the given register... AL gives RAX...</returns>
zydis_register_t to64( zydis_register_t reg ); zydis_register_t to64( zydis_register_t reg );
/// <summary>
/// compares to registers with each other... calls to64 and compares...
/// </summary>
/// <param name="a">register a...</param>
/// <param name="b">register b...</param>
/// <returns>returns true if register to64(a) == to64(b)...</returns>
bool compare( zydis_register_t a, zydis_register_t b ); bool compare( zydis_register_t a, zydis_register_t b );
} // namespace reg } // namespace reg
/// <summary>
/// get the instruction that fetches an operand out of VIP...
/// </summary>
/// <param name="routine">this is a deobfuscated, flattened, view of any set of native instructions that read an operand out of VIP... can be calc_jmp, vm_entry, or vm handlers...</param>
/// <param name="fetch_instr"></param>
/// <returns>returns true of the fetch operand native instruction is found...</returns>
bool get_fetch_operand( const zydis_routine_t &routine, zydis_instr_t &fetch_instr ); bool get_fetch_operand( const zydis_routine_t &routine, zydis_instr_t &fetch_instr );
/// <summary>
/// gets the instruction that fetches an operand out of VIP and returns an iterator to it...
/// </summary>
/// <param name="routine">this is a deobfuscated, flattened, view of any set of native instructions that read an operand out of VIP... can be calc_jmp, vm_entry, or vm handlers...</param>
/// <returns>returns the iterator of the native instruction, else an empty std::optional...</returns>
std::optional< zydis_routine_t::iterator > get_fetch_operand( zydis_routine_t &routine ); std::optional< zydis_routine_t::iterator > get_fetch_operand( zydis_routine_t &routine );
/// <summary>
/// prints a disassembly view of a routine...
/// </summary>
/// <param name="routine">reference to a zydis_routine_t to be printed...</param>
void print( zydis_routine_t &routine ); void print( zydis_routine_t &routine );
/// <summary>
/// prints a single disassembly view of an instruction...
/// </summary>
/// <param name="instr">instruction to print...</param>
void print( const zydis_decoded_instr_t &instr ); void print( const zydis_decoded_instr_t &instr );
/// <summary>
/// determines if a given decoded native instruction is a JCC...
/// </summary>
/// <param name="instr"></param>
/// <returns></returns>
bool is_jmp( const zydis_decoded_instr_t &instr ); bool is_jmp( const zydis_decoded_instr_t &instr );
/// <summary>
/// flatten native instruction stream, takes every JCC (follows the branch)...
/// </summary>
/// <param name="routine">filled with decoded instructions...</param>
/// <param name="routine_addr">linear virtual address to start flattening from...</param>
/// <param name="keep_jmps">keep JCC's in the flattened instruction stream...</param>
/// <returns>returns true if flattened was successful...</returns>
bool flatten( zydis_routine_t &routine, std::uintptr_t routine_addr, bool keep_jmps = false ); bool flatten( zydis_routine_t &routine, std::uintptr_t routine_addr, bool keep_jmps = false );
/// <summary>
/// deadstore deobfuscation of a flattened routine...
/// </summary>
/// <param name="routine">reference to a flattened instruction vector...</param>
void deobfuscate( zydis_routine_t &routine ); void deobfuscate( zydis_routine_t &routine );
} // namespace vm::util } // namespace vm::util
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