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LunaHook-mirror/LunaHook/engine32/Elf.cpp

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Initial commit
2024-02-07 20:59:24 +08:00
#include"Elf.h"
/**
* jichi 6/1/2014:
* Observations from 愛姉妹4
* - Scenario: arg1 + 4*5 is 0, arg1+0xc is address of the text
* - Character: arg1 + 4*10 is 0, arg1+0xc is text
*/
static inline size_t _elf_strlen(LPCSTR p) // limit search address which might be bad
{
//CC_ASSERT(p);
for (size_t i = 0; i < VNR_TEXT_CAPACITY; i++)
if (!*p++)
return i;
return 0; // when len >= VNR_TEXT_CAPACITY
}
static void SpecialHookElf(hook_stack* stack, HookParam *, uintptr_t *data, uintptr_t *split, size_t *len)
{
//DWORD arg1 = *(DWORD *)(esp_base + 0x4);
DWORD arg1 = stack->stack[1];
DWORD arg2_scene = arg1 + 4*5,
arg2_chara = arg1 + 4*10;
DWORD text; //= 0; // This variable will be killed
if (*(DWORD *)arg2_scene == 0) {
text = *(DWORD *)(arg2_scene + 4*3);
if (!text || ::IsBadReadPtr((LPCVOID)text, 1)) // Text from scenario could be bad when open backlog while the character is speaking
return;
*split = 1;
} else if (*(DWORD *)arg2_chara == 0) {
text = arg2_chara + 4*3;
*split = 2;
} else
return;
//if (text && text < MemDbg::UserMemoryStopAddress) {
*len = _elf_strlen((LPCSTR)text); // in case the text is bad but still readable
//*len = ::strlen((LPCSTR)text);
*data = text;
}
/**
* jichi 5/31/2014: elf's
* Type1: SEXヂ<EFBFBD>ーチャー剛史 trial, reladdr = 0x2f0f0, 2 parameters
* Type2: 愛姉妹4, reladdr = 0x2f9b0, 3 parameters
*
* IDA: sub_42F9B0 proc near ; bp-based frame
* var_8 = dword ptr -8
* var_4 = byte ptr -4
* var_3 = word ptr -3
* arg_0 = dword ptr 8
* arg_4 = dword ptr 0Ch
* arg_8 = dword ptr 10h
*
* Call graph (Type2):
* 0x2f9b0 ; hook here
* > 0x666a0 ; called multiple time
* > TextOutA ; there are two TextOutA, the second is the right one
*
* Function starts (Type1), pattern offset: 0xc
* - 012ef0f0 /$ 55 push ebp ; jichi: hook
* - 012ef0f1 |. 8bec mov ebp,esp
* - 012ef0f3 |. 83ec 10 sub esp,0x10
* - 012ef0f6 |. 837d 0c 00 cmp dword ptr ss:[ebp+0xc],0x0
* - 012ef0fa |. 53 push ebx
* - 012ef0fb |. 56 push esi
* - 012ef0fc |. 75 0f jnz short stt_tria.012ef10d ; jicchi: pattern starts
* - 012ef0fe |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8]
* - 012ef101 |. 8b48 04 mov ecx,dword ptr ds:[eax+0x4]
* - 012ef104 |. 8b91 90000000 mov edx,dword ptr ds:[ecx+0x90] ; jichi: pattern stops
* - 012ef10a |. 8955 0c mov dword ptr ss:[ebp+0xc],edx
* - 012ef10d |> 8b4d 08 mov ecx,dword ptr ss:[ebp+0x8]
* - 012ef110 |. 8b51 04 mov edx,dword ptr ds:[ecx+0x4]
* - 012ef113 |. 33c0 xor eax,eax
* - 012ef115 |. c645 f8 00 mov byte ptr ss:[ebp-0x8],0x0
* - 012ef119 |. 66:8945 f9 mov word ptr ss:[ebp-0x7],ax
* - 012ef11d |. 8b82 b0000000 mov eax,dword ptr ds:[edx+0xb0]
* - 012ef123 |. 8945 f4 mov dword ptr ss:[ebp-0xc],eax
* - 012ef126 |. 33db xor ebx,ebx
* - 012ef128 |> 8b4f 20 /mov ecx,dword ptr ds:[edi+0x20]
* - 012ef12b |. 83f9 10 |cmp ecx,0x10
*
* Function starts (Type2), pattern offset: 0x10
* - 0093f9b0 /$ 55 push ebp ; jichi: hook here
* - 0093f9b1 |. 8bec mov ebp,esp
* - 0093f9b3 |. 83ec 08 sub esp,0x8
* - 0093f9b6 |. 837d 10 00 cmp dword ptr ss:[ebp+0x10],0x0
* - 0093f9ba |. 53 push ebx
* - 0093f9bb |. 8b5d 0c mov ebx,dword ptr ss:[ebp+0xc]
* - 0093f9be |. 56 push esi
* - 0093f9bf |. 57 push edi
* - 0093f9c0 |. 75 0f jnz short silkys.0093f9d1 ; jichi: pattern starts
* - 0093f9c2 |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8]
* - 0093f9c5 |. 8b48 04 mov ecx,dword ptr ds:[eax+0x4]
* - 0093f9c8 |. 8b91 90000000 mov edx,dword ptr ds:[ecx+0x90] ; jichi: pattern stops
* - 0093f9ce |. 8955 10 mov dword ptr ss:[ebp+0x10],edx
* - 0093f9d1 |> 33c0 xor eax,eax
* - 0093f9d3 |. c645 fc 00 mov byte ptr ss:[ebp-0x4],0x0
* - 0093f9d7 |. 66:8945 fd mov word ptr ss:[ebp-0x3],ax
* - 0093f9db |. 33ff xor edi,edi
* - 0093f9dd |> 8b53 20 /mov edx,dword ptr ds:[ebx+0x20]
* - 0093f9e0 |. 8d4b 0c |lea ecx,dword ptr ds:[ebx+0xc]
* - 0093f9e3 |. 83fa 10 |cmp edx,0x10
*/
bool InsertElfHook()
{
const BYTE bytes[] = {
//0x55, // 0093f9b0 /$ 55 push ebp ; jichi: hook here
//0x8b,0xec, // 0093f9b1 |. 8bec mov ebp,esp
//0x83,0xec, 0x08, // 0093f9b3 |. 83ec 08 sub esp,0x8
//0x83,0x7d, 0x10, 0x00, // 0093f9b6 |. 837d 10 00 cmp dword ptr ss:[ebp+0x10],0x0
//0x53, // 0093f9ba |. 53 push ebx
//0x8b,0x5d, 0x0c, // 0093f9bb |. 8b5d 0c mov ebx,dword ptr ss:[ebp+0xc]
//0x56, // 0093f9be |. 56 push esi
//0x57, // 0093f9bf |. 57 push edi
0x75, 0x0f, // 0093f9c0 |. 75 0f jnz short silkys.0093f9d1
0x8b,0x45, 0x08, // 0093f9c2 |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8]
0x8b,0x48, 0x04, // 0093f9c5 |. 8b48 04 mov ecx,dword ptr ds:[eax+0x4]
0x8b,0x91, 0x90,0x00,0x00,0x00 // 0093f9c8 |. 8b91 90000000 mov edx,dword ptr ds:[ecx+0x90]
};
//enum { addr_offset = 0xc };
ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
//GROWL_DWORD(addr);
//addr = 0x42f170; // 愛姉妹4 Trial
//reladdr = 0x2f9b0; // 愛姉妹4
//reladdr = 0x2f0f0; // SEXヂ<58>ーチャー剛史 trial
if (!addr) {
ConsoleOutput("Elf: pattern not found");
return false;
}
enum : BYTE { push_ebp = 0x55 };
for (int i = 0; i < 0x20; i++, addr--) // value of i is supposed to be 0xc or 0x10
if (*(BYTE *)addr == push_ebp) { // beginning of the function
HookParam hp;
hp.address = addr;
hp.text_fun = SpecialHookElf;
hp.type = USING_STRING|NO_CONTEXT; // = 9
ConsoleOutput("INSERT Elf");
return NewHook(hp, "Elf");
}
ConsoleOutput("Elf: function not found");
return false;
}
namespace{
bool __(){
const BYTE bytes[] = {
//姫騎士オリヴィア ～へ、変態、この変態男!少しは恥を知りなさい!～
//女系家族III～秘密HIMITSU卑蜜～
//ベロちゅー！～コスプレメイドをエロメロしちゃう魔法の舌戯～
0x0F,0xB7,XX,XX4, //v11 == 30081 // movzx edx, ds:word_4C285C //word_4C285C dw 7581h
};
for (auto addr : Util::SearchMemory(bytes, sizeof(bytes), PAGE_EXECUTE, processStartAddress, processStopAddress)) {
BYTE reg=*(BYTE*)(addr+2);
if((reg!=0x05)&&(reg!=0x0d)&&(reg!=0x1d)&&(reg!=0x15))continue;
int word_4C285C_addr=*(int*)(addr+3);
if(word_4C285C_addr<processStartAddress || word_4C285C_addr>processStopAddress)continue;
int word_4C285C=*(int*)word_4C285C_addr;
if((word_4C285C)!=0x7581)continue;
addr = findfuncstart(addr, 0x200);
if (addr == 0)continue;
HookParam hp;
hp.address = addr;
hp.offset=get_stack(1);
hp.type = USING_STRING;
return NewHook(hp, "aiwin6");
}
return false;
}
}
#include"embed_util.h"
namespace { // unnamed
namespace ScenarioHook {
namespace Private {
struct TextArgument
{
DWORD _unknown1[5];
DWORD scenarioFlag; // +4*5, 0 if it is scenario
DWORD _unknown2[2];
LPCSTR scenarioText; // +4*5+4*3, could be bad address though
DWORD _unknown3;
DWORD nameFlag; // +4*10, 0 if it is name
DWORD _unknown4[2];
char nameText[1]; // +4*10+4*3, could be bad address though
};
std::string data_;
TextArgument *scenarioArg_,
*nameArg_;
LPCSTR scenarioText_;
enum { MaxNameSize = 100 };
char nameText_[MaxNameSize + 1];
bool hookBefore(hook_stack*s,void* data, size_t* len,uintptr_t*role)
{
auto arg = (TextArgument *)s->stack[0]; // arg1 on the top of the stack
// Scenario
if (arg->scenarioFlag == 0) {
* role = Engine::ScenarioRole ;
// Text from scenario could be bad when open backlog while the character is speaking
auto text = arg->scenarioText;
if (!Engine::isAddressReadable(text))
return 0;
refactor
2024-03-21 17:57:04 +08:00
return write_string_overwrite(data,len,text);
Initial commit
2024-02-07 20:59:24 +08:00
// data_ = q->dispatchTextASTD(text, role, sig);
// scenarioArg_ = arg;
// scenarioText_ = arg->scenarioText;
// arg->scenarioText = (LPCSTR)data_.c_str();
} else if (arg->nameFlag == 0) {
* role = Engine::NameRole;
auto text = arg->nameText;
refactor
2024-03-21 17:57:04 +08:00
return write_string_overwrite(data,len,text);
Initial commit
2024-02-07 20:59:24 +08:00
// ::memcpy(text, newData.constData(), qMin(oldData.size(), newData.size()));
//int left = oldData.size() - newData.size();
//if (left > 0)
// ::memset(text + oldData.size() - left, 0, left);
}
return 0;
}
void hookafter1(hook_stack*s,void* data1, size_t len){
auto newData=std::string((char*)data1,len);
auto arg = (TextArgument *)s->stack[0]; // arg1 on the top of the stack
// Scenario
if (arg->scenarioFlag == 0) {
auto text = arg->scenarioText;
if (!Engine::isAddressReadable(text))
return ;
data_ = newData;
scenarioArg_ = arg;
scenarioText_ = arg->scenarioText;
arg->scenarioText = (LPCSTR)data_.c_str();
} else if (arg->nameFlag == 0) {
auto text = arg->nameText;
std::string oldData=text;
::memcpy(text, newData.c_str(), min(oldData.size(), newData.size()));
int left = oldData.size() - newData.size();
if (left > 0)
::memset(text + oldData.size() - left, 0, left);
}
}
bool hookAfter(hook_stack*s,void* data, size_t* len,uintptr_t*role)
{
if (scenarioArg_) {
scenarioArg_->scenarioText = scenarioText_;
scenarioArg_ = nullptr;
}
if (nameArg_) {
::strcpy(nameArg_->nameText, nameText_);
nameArg_ = nullptr;
}
return 0;
}
} // namespace Private
/**
* jichi 5/31/2014: elf's
* Type1: SEXティーチャー剛史 trial, reladdr = 0x2f0f0, 2 parameters
* Type2: 愛姉妹4, reladdr = 0x2f9b0, 3 parameters
*
* The hooked function is the caller of the caller of TextOutA.
*/
bool attach(ULONG startAddress, ULONG stopAddress)
{
const uint8_t bytes[] = {
//0x55, // 0093f9b0 /$ 55 push ebp ; jichi: hook here
//0x8b,0xec, // 0093f9b1 |. 8bec mov ebp,esp
//0x83,0xec, 0x08, // 0093f9b3 |. 83ec 08 sub esp,0x8
//0x83,0x7d, 0x10, 0x00, // 0093f9b6 |. 837d 10 00 cmp dword ptr ss:[ebp+0x10],0x0
//0x53, // 0093f9ba |. 53 push ebx
//0x8b,0x5d, 0x0c, // 0093f9bb |. 8b5d 0c mov ebx,dword ptr ss:[ebp+0xc]
//0x56, // 0093f9be |. 56 push esi
//0x57, // 0093f9bf |. 57 push edi
0x75, 0x0f, // 0093f9c0 |. 75 0f jnz short silkys.0093f9d1
0x8b,0x45, 0x08, // 0093f9c2 |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8]
0x8b,0x48, 0x04, // 0093f9c5 |. 8b48 04 mov ecx,dword ptr ds:[eax+0x4]
0x8b,0x91, 0x90,0x00,0x00,0x00 // 0093f9c8 |. 8b91 90000000 mov edx,dword ptr ds:[ecx+0x90]
};
ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), startAddress, stopAddress);
if (!addr)
return false;
addr = MemDbg::findEnclosingAlignedFunction(addr);
if (!addr)
return false;
int count = 0;
auto fun = [&count](ULONG addr) -> bool {
bool succ=false;
HookParam hp;
hp.address=addr;
hp.hook_before=Private::hookBefore;
hp.hook_after=Private::hookafter1;
hp.type=USING_STRING|EMBED_ABLE|EMBED_DYNA_SJIS;
hp.hook_font=F_TextOutA;
succ|=NewHook(hp,"EmbedElf");
hp.address=addr+5;
hp.hook_before=Private::hookAfter;
succ|=NewHook(hp,"EmbedElf");
count+=1;
return succ; // replace all functions
};
MemDbg::iterNearCallAddress(fun, addr, startAddress, stopAddress);
return count;
//lastCaller = MemDbg::findEnclosingAlignedFunction(lastCaller);
//Private::attached_ = false;
//return winhook::hook_before(lastCaller, [=](winhook::hook_stack *s) -> bool {
// if (Private::attached_)
// return true;
// Private::attached_ = true;
// if (ULONG addr = MemDbg::findEnclosingAlignedFunction(s->stack[0])) {
// DOUT("dynamic pattern found");
// Private::oldHookFun = (Private::hook_fun_t)winhook::replace_fun(addr, (ULONG)Private::newHookFun);
// }
// return true;
//});
}
} // namespace ScenarioHook
} // unnamed namespace
bool Elf::attach_function() {
auto _1= InsertElfHook()||__();
return ScenarioHook::attach(processStartAddress,processStopAddress)||_1;
}
bool isshiftjisX(WORD w){
return (((BYTE)(w))<=0xfc)&& (((BYTE)(w))>=0x80);
}
void SpecialHookElf2(hook_stack* stack, HookParam *, uintptr_t *data, uintptr_t *split, size_t *len)
{
static DWORD lasttext;
DWORD eax = stack->eax;
DWORD edx = stack->edx;
*data = *(WORD*)(eax+edx);
if(isshiftjisX(*data)==false){
*len=0;
return;
}
*len = 2;
*split=stack->stack[1];
}
bool Elf2attach_function() {
//这个有好多乱码
//[エルフ]あしたの雪之丞 DVD Special Edition
const uint8_t bytes[] = {
0x53,
0x8a,0x1c,0x02,
0x8b,0x54,0x24,0x08,
0x03,0xc2
};
ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStopAddress);
if (!addr)
return false;
HookParam hp;
hp.address=addr+1;
hp.text_fun = SpecialHookElf2;
hp.type=NO_CONTEXT;
return NewHook(hp,"Elf");
}
bool elf2(){
//[エルフ]あしたの雪之丞 DVD Special Edition
//勝　あしたの雪之丞２
const uint8_t bytes[] = {
0x66,0x8b,0x8e,XX4,
0x66,0x8b,0x96,XX4,
0x66,0x01,0x8e,XX4,
0x66,0x89,0x96,XX4,
0x8b,0x06,
0x6a,0x00,
0x8b,0xce,
0xff,0x50,0x08,
0x84,0xc0
};
ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStopAddress);
if (!addr)
return false;
HookParam hp;
hp.address=addr+sizeof(bytes);
hp.type=NO_CONTEXT|USING_STRING;
hp.offset=get_reg(regs::ebx);
return NewHook(hp,"Elf");
}
bool Elf2::attach_function(){
return elf2()||Elf2attach_function();
elf
2024-02-09 00:42:25 +08:00
}
bool ElfFunClubFinal::attach_function(){
auto entry=Util::FindImportEntry(processStartAddress,(DWORD)TextOutA);
if(entry==0)return false;
BYTE bytes[]={0x8b,XX,XX4};//mov reg,ds:TextOutA
memcpy(bytes+2,&entry,4);
bool succ=false;
for(auto addr:Util::SearchMemory(bytes, sizeof(bytes), PAGE_EXECUTE, processStartAddress, processStopAddress)){
BYTE s[]={XX,0xCC,0xCC,0xCC};
addr=reverseFindBytes(s,4,addr-0x100,addr);
if(addr==0)continue;
HookParam hp;
hp.address=addr+4;
hp.type=CODEC_ANSI_BE|USING_CHAR;
hp.text_fun=[](hook_stack* stack, HookParam *hp, uintptr_t* data, uintptr_t* split, size_t* len){
*data=(WORD)stack->stack[3];
*len=2;
*split=stack->stack[2]>8;
};
succ|= NewHook(hp,"ElfFunClubFinal");
}
return succ;
Initial commit
2024-02-07 20:59:24 +08:00
}
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