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Pas à pas & pas à pas détaillé fonctionnel

This commit is contained in:
Horde Nicolas 2021-07-13 09:30:52 +02:00
parent cb1cbae9c9
commit bbb96f6381
3 changed files with 212 additions and 97 deletions
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229
ia86.cpp
View File

@ -80,6 +80,17 @@ Scenario scenario;
Unasm unasm;
int marker;
bool debug=true;
uc_hook uh_mem;
uc_hook uh_code;
uc_hook uh_call;
uc_hook uh_int;
bool step=false;
bool call=false;
bool ok=false;
bool executed=false;
bool initialized=false;
uint32_t hadcall=0x0;
//----------------------------------------------------------------------
// Classe ScenarioWindow
//----------------------------------------------------------------------
@ -153,7 +164,6 @@ InstructionWindow::InstructionWindow (finalcut::FWidget* parent)
{
listview.ignorePadding();
listview.addColumn ("P");
listview.addColumn ("Adresse");
listview.addColumn ("Opcodes ");
listview.addColumn ("Mnémo.");
@ -162,7 +172,7 @@ InstructionWindow::InstructionWindow (finalcut::FWidget* parent)
listview.setFocus();
}
std::vector<std::array<std::string, 5>> InstructionWindow::get()
std::vector<std::array<std::string, 4>> InstructionWindow::get()
{
return content;
}
@ -183,7 +193,7 @@ int InstructionWindow::getsize()
return listview.getCount();
}
void InstructionWindow::set(std::vector<std::array<std::string, 5>> src)
void InstructionWindow::set(std::vector<std::array<std::string, 4>> src)
{
content=src;
listview.clear();
@ -284,7 +294,7 @@ void TextWindow::append(const finalcut::FString& str)
std::string TextWindow::get()
{
return scrolltext.getText().toString () ;
return scrolltext.getText().toString() ;
}
void TextWindow::set(const finalcut::FString& str)
@ -316,18 +326,18 @@ void TextWindow::adjustSize()
// Classe Desassembler
//----------------------------------------------------------------------
Desassembler::Desassembler(TextWindow *log) : log(log)
Desassembler::Desassembler(Menu *widget) : widget(widget)
{
try
{
err = cs_open(CS_ARCH_X86, CS_MODE_16, &handle);
if (err != CS_ERR_OK)
throw Error("Désassembleur - initialisation....................[ERREUR]");
log->append("Désassembleur - initialisation....................[ OK ]");
widget->log.append("Désassembleur - initialisation....................[ OK ]");
}
catch(exception const& e)
{
log->append(e.what());
widget->log.append(e.what());
}
}
@ -341,7 +351,7 @@ void Desassembler::Desassemble(uint8_t *content, uint32_t address,uint32_t size,
throw Error("Désassembleur - désassemblage.....................[ERREUR]");
else
{
if (debug) log->append("Désassemblage - désassemblage.....................[ "+to_string(srcsize)+"l ]");
if (debug) widget->log.append("Désassemblage - désassemblage.....................[ "+to_string(srcsize)+"l ]");
unasm->src.clear();
unasm->pos.clear();
for (size_t j = 0; j < srcsize; j++)
@ -352,7 +362,7 @@ void Desassembler::Desassemble(uint8_t *content, uint32_t address,uint32_t size,
std::string adresse = intToHexString((int)insn[j].address, 8);
std::string *menmonic = new std::string((char *)insn[j].mnemonic);
std::string *op_str = new std::string((char *)insn[j].op_str);
std::array<std::string, 5> *array = new std::array<std::string, 5>{"", adresse, *bytes, *menmonic, *op_str};
std::array<std::string, 4> *array = new std::array<std::string, 4>{adresse, *bytes, *menmonic, *op_str};
unasm->src.push_back(*array);
unasm->pos.push_back(insn[j].address);
}
@ -363,7 +373,7 @@ void Desassembler::Desassemble(uint8_t *content, uint32_t address,uint32_t size,
{
unasm->src.clear();
unasm->pos.clear();
log->append(e.what());
widget->log.append(e.what());
}
}
@ -372,18 +382,18 @@ void Desassembler::Desassemble(uint8_t *content, uint32_t address,uint32_t size,
// Classe Assembler
//----------------------------------------------------------------------
Assembler::Assembler(TextWindow *log) : log(log)
Assembler::Assembler(Menu *widget) : widget(widget)
{
try
{
err = ks_open(KS_ARCH_X86, KS_MODE_16, &ks);
if (err != KS_ERR_OK)
throw Error("Assembleur - initialisation.......................[ERREUR]");
log->append("Assembleur - initialisation.......................[ OK ]");
widget->log.append("Assembleur - initialisation.......................[ OK ]");
}
catch(exception const& e)
{
log->append(e.what());
widget->log.append(e.what());
}
ks_option(ks, KS_OPT_SYNTAX, KS_OPT_SYNTAX_NASM);
}
@ -426,13 +436,13 @@ std::vector<Code> Assembler::MultiAssemble(std::string source,uint32_t address)
mcode.push_back(*code);
for(size_t i=0;i<mcode.size();i++)
this->Assemble(&mcode[i]);
log->append("Assembleur - assemblage...........................[ OK ]");
widget->log.append("Assembleur - assemblage...........................[ OK ]");
return mcode;
}
catch(exception const& e)
{
std::vector<Code> mcode;
log->append(e.what());
widget->log.append(e.what());
return mcode;
}
@ -449,7 +459,7 @@ void Assembler::Assemble(Code *code)
code->size=0;
code->assembled=false;
code->loaded=false;
throw Error("Assembleur - assemblage...........................[ERREUR]");
throw Error("Assembleur - assemblage...........................[ERREUR]\n Nombre:"+to_string(srcsize)+"\n Erreur:"+std::string(ks_strerror(ks_errno(ks))));
}
else
code->assembled=true;
@ -459,7 +469,7 @@ void Assembler::Assemble(Code *code)
// Classe VMEngine
//----------------------------------------------------------------------
VMEngine::VMEngine(TextWindow *log) : log(log)
VMEngine::VMEngine(Menu *widget) : widget(widget)
{
code=new uint8_t[500];
Init();
@ -623,25 +633,26 @@ void VMEngine::Init()
{
try
{
hadcall=0;
err = uc_open(UC_ARCH_X86, UC_MODE_16, &uc);
if (err != UC_ERR_OK)
throw Error("VM IA86 - initilisation...........................[ERREUR]");
log->append("VM IA86 - initilisation...........................[ OK ]");
widget->log.append("VM IA86 - initilisation...........................[ OK ]");
}
catch(exception const& e)
{
log->append(e.what());
widget->log.append(e.what());
}
}
bool VMEngine::isExecuted()
{
return this->executed;
return executed;
}
bool VMEngine::isInitialized()
{
return this->initialized;
return initialized;
}
void VMEngine::Close()
@ -651,31 +662,17 @@ void VMEngine::Close()
void VMEngine::Halt()
{
if (this->executed)
log->append("VM IA86 - arret...................................[ INFO ]");
this->executed=false;
if (executed)
widget->log.append("VM IA86 - arret...................................[ INFO ]");
executed=false;
}
void VMEngine::Unconfigure()
{
this->Halt();
if (this->initialized)
log->append("VM IA86 - déconfiguration.........................[ INFO ]");
this->initialized=false;
}
uint32_t VMEngine::getNextInstr()
{
uint32_t now=getEIP();
bool flag=false;
for(int pos: unasm.pos)
{
if (pos==now)
flag=true;
else if (flag)
return pos;
}
return 0;
if (initialized)
widget->log.append("VM IA86 - déconfiguration.........................[ INFO ]");
initialized=false;
}
std::string VMEngine::getRam(int segment, int address,int lines, int linesize)
@ -708,7 +705,7 @@ std::string VMEngine::getRam(int segment, int address,int lines, int linesize)
return result;
}
std::vector<std::array<std::string, 5>> VMEngine::getInstr(int segment, int address,int size)
std::vector<std::array<std::string, 4>> VMEngine::getInstr(int segment, int address,int size)
{
uint32_t realaddress=segment*16+address;
if (realaddress<bufferaddress || realaddress+(size*7)>bufferaddress+500)
@ -743,10 +740,10 @@ std::vector<std::array<std::string, 5>> VMEngine::getInstr(int segment, int addr
int last=first+size;
marker=0;
std::string reference=intToHexString(address, 8);
std::vector<std::array<std::string, 5>> result = {unasm.src.begin()+first,unasm.src.begin()+last};
for(std::array<std::string, 5> item: result)
std::vector<std::array<std::string, 4>> result = {unasm.src.begin()+first,unasm.src.begin()+last};
for(std::array<std::string, 4> item: result)
{
if (item[1]==reference)
if (item[0]==reference)
break;
marker++;
}
@ -759,6 +756,63 @@ int VMEngine::getLine()
return marker;
}
//----------------------------------------------------------------------
// Hook
//----------------------------------------------------------------------
static void hook_int(uc_engine *uc, uint32_t intno, void *user_data)
{
((Menu *)user_data)->tolog("INT "+to_string(intno));
}
static void hook_code (uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
{
if (!ok)
{
ok=true;
return;
}
uint8_t code[2];
uc_err err = uc_mem_read(uc, address, &code, 2);
if (err)
throw Error("VM IA86 - hook instructions.......................[ERREUR]");
//((Menu *)user_data)->tolog(intToHexString(code[0],2));
//((Menu *)user_data)->tolog(intToHexString(code[1],2));
if (code[0]==0xF4)
executed=false;
else if (step && (code[0]==0xE8 || code[0]==0xFF || code[0]==0x9A || (code[0]==0x66 && (code[1]==0xE8 || code[1]==0xFF || code[1]==0x9A))))
hadcall=address+size;
else if (!step || (hadcall>0 && !call)) return;
uc_emu_stop(uc);
}
static void hook_call(uc_engine *uc, uint32_t intno, void *user_data)
{
((Menu *)user_data)->tolog("SYSCALL");
}
static void hook_memory_write(uc_engine *uc, uc_mem_type type, uint64_t address, int size, int64_t value, void *user_data)
{
switch (type)
{
case UC_MEM_WRITE:
if ((address>=0xB8000) && (address<=0xB8000+80*25*2))
{
uint16_t offset=address-0xB8000;
uint16_t y=(int)(offset/(80*2));
uint16_t x=offset%(80*2);
char achar;
if (std::isprint(value))
achar=(char)value;
else
achar='.';
if ((size==1) && (x%2==0))
((Menu *)user_data)->SetScreen(x/2,y,achar);
}
}
}
void VMEngine::Configure(State *init, std::string code)
{
try
@ -771,31 +825,35 @@ void VMEngine::Configure(State *init, std::string code)
Close();
Init();
bufferaddress=-666;
this->initialized=false;
this->executed=false;
//log->append("Mappage de la mémoire virtuelle");
initialized=false;
executed=false;
//widget->log.append("Mappage de la mémoire virtuelle");
uc_mem_map(uc, 0, 1 * 1024 * 1024, UC_PROT_ALL);
uc_hook_add(uc, &uh_call, UC_HOOK_INSN, (void*)hook_call, (void*)widget, 1, 0, UC_X86_INS_SYSCALL);
uc_hook_add(uc, &uh_mem, UC_HOOK_MEM_WRITE, (void*)hook_memory_write, (void*)widget, 1, 0);
uc_hook_add(uc, &uh_code, UC_HOOK_CODE, (void*)hook_code, (void*)widget, 1, 0);
uc_hook_add(uc, &uh_int, UC_HOOK_INTR, (void*)hook_int, (void*)widget, 1, 0);
for(size_t i=0;i<mcode.size();i++)
{
if (mcode[i].assembled)
SetMem(&mcode[i]);
else
throw Error("VM IA86 - code non assemblé...................[ERREUR]");
if (debug) log->append("Section N°"+std::to_string(i)+" : "+intToHexString(mcode[i].address,8)+" -> "+to_string(mcode[i].size)+" octets");
if (debug) widget->log.append("Section N°"+std::to_string(i)+" : "+intToHexString(mcode[i].address,8)+" -> "+to_string(mcode[i].size)+" octets");
}
status=verify();
if (status==0)
{
this->initialized=true;
initialized=true;
SetRegs(init);
}
else
this->initialized=false;
initialized=false;
}
catch(exception const& e)
{
log->append(e.what());
this->initialized=false;
widget->log.append(e.what());
initialized=false;
}
}
@ -964,37 +1022,42 @@ void VMEngine::SetRegs(State *init)
out << " AX=" << std::uppercase << std::setfill('0') << std::setw(4) << std::hex << init->dump.regs.ax << " ";
else
out << "EAX=" << std::uppercase << std::setfill('0') << std::setw(8) << std::hex << init->dump.regs.eax << " ";
log->append(out.str());
widget->log.append(out.str());
}
void VMEngine::Run(uint32_t end,uint64_t timeout)
void VMEngine::Run(bool astep, bool acall, uint64_t timeout)
{
try
{
if (verify()==0 && this->initialized)
if (verify()==0 && initialized)
{
err=uc_emu_start(uc, this->getCurrent(), end, timeout, 0);
ok=false;
step=astep;
call=acall;
if (hadcall==0)
err=uc_emu_start(uc, this->getCurrent(), 0xFFFFFFFF, timeout, 0);
else
{
err=uc_emu_start(uc, this->getCurrent(), hadcall, timeout, 0);
hadcall=0;
}
if (err)
throw Error("VM IA86 - execution...............................[ERREUR]");
else
{
if (!this->executed)
log->append("VM IA86 - execution...............................[ INFO ]");
this->executed="true";
if (!executed)
widget->log.append("VM IA86 - execution...............................[ INFO ]");
executed="true";
}
}
}
catch(exception const& e)
{
this->Halt();
log->append(e.what());
widget->log.append(e.what());
}
}
//----------------------------------------------------------------------
// Classe
//----------------------------------------------------------------------
//----------------------------------------------------------------------
// Classe Menu
//----------------------------------------------------------------------
@ -1090,7 +1153,7 @@ void Menu::initWindows()
}
// Level 1 : IP AL
// Level 2 : IP AX
// Level 2 : I:P AX
// Level 3 : IP AX BX CX DX
// Level 4 : IP AX BX CX DX FLAGS
// Level 5 : IP AX BX CX DX FLAGS SI DI
@ -1112,7 +1175,7 @@ void Menu::AdjustWindows()
stack.setGeometry ( FPoint { 43, 01 }, FSize{15, 15} );
mem.setGeometry ( FPoint { 77, 01 }, FSize{108, 15} );
tuto.setGeometry ( FPoint { 125, 45 }, FSize{60, 11} );
screen.setGeometry ( FPoint { 105, 18 }, FSize{80, 25} );
screen.setGeometry ( FPoint { 103, 16 }, FSize{82, 28} );
debug.setGeometry ( FPoint { 42, 17 }, FSize{60, 27} );
scenar.setGeometry ( FPoint { 187, 01 }, FSize{25, 55} );
this->hide();
@ -1167,6 +1230,26 @@ void Menu::initMenus()
About.setStatusbarMessage ("A propos de IA86");
}
void Menu::ClearScreen()
{
std::string empty="";
for(int i=0;i<80*25;i++)
{
if ((i%80==0) && i!=0)
empty+="\n";
empty+="X";
}
screen.set(empty);
}
void Menu::SetScreen(uint16_t x, uint16_t y, char value)
{
std::string temp=screen.get();
if (x<25 && y<80)
temp[x+y*81]=value;
screen.set(temp);
}
void Menu::onTimer (finalcut::FTimerEvent* ev)
{
refresh();
@ -1284,9 +1367,15 @@ void Menu::end()
void Menu::compile()
{
vm.Configure(&scenario.levels[scenar.getselected()].init,edit.get());
ClearScreen();
showInstr();
}
void Menu::tolog(std::string str)
{
log.append(str);
}
void Menu::about()
{
log.hide();
@ -1366,7 +1455,7 @@ void Menu::exec()
{
if (!vm.isInitialized())
compile();
vm.Run(0xFFFF,0);
vm.Run(false,false,0);
showInstr();
}
@ -1374,7 +1463,7 @@ void Menu::trace()
{
if (!vm.isInitialized())
compile();
vm.Run(vm.getNextInstr(),0);
vm.Run(true,false,0);
showInstr();
}
@ -1382,7 +1471,7 @@ void Menu::step()
{
if (!vm.isInitialized())
compile();
vm.Run(vm.getNextInstr(),0);
vm.Run(true,true,0);
showInstr();
}

41
ia86.h
View File

@ -139,7 +139,7 @@ struct Code
struct Unasm
{
std::vector<std::array<std::string, 5>> src;
std::vector<std::array<std::string, 4>> src;
std::vector<uint32_t> pos;
};
@ -199,14 +199,14 @@ class InstructionWindow final : public finalcut::FDialog
// Disable copy assignment operator (=)
InstructionWindow& operator = (const InstructionWindow&) = delete;
// Method
std::vector<std::array<std::string, 5>> get();
void set(std::vector<std::array<std::string, 5>> src);
std::vector<std::array<std::string, 4>> get();
void set(std::vector<std::array<std::string, 4>> src);
void clear();
void setmark(int index);
int getsize();
private:
// Method
std::vector<std::array<std::string, 5>> content;
std::vector<std::array<std::string, 4>> content;
void initLayout() override;
void adjustSize() override;
// Data members
@ -263,50 +263,51 @@ class TextWindow final : public finalcut::FDialog
finalcut::FTextView scrolltext{this};
};
class Menu;
class Desassembler
{
public:
Desassembler(TextWindow *log);
Desassembler(Menu *widget);
void Desassemble(uint8_t *content, uint32_t address,uint32_t size, Unasm *unasm);
private:
csh handle;
cs_insn *insn;
int err;
TextWindow *log;
Menu *widget;
TextEditWindow *edit;
size_t srcsize;
size_t codesize;
std::vector<std::array<std::string, 5>> src;
std::vector<std::array<std::string, 4>> src;
unsigned char *src_char = new unsigned char[64*1024];
};
class Assembler
{
public:
Assembler(TextWindow *log);
Assembler(Menu *widget);
void Assemble(Code *code);
std::vector<Code> MultiAssemble(std::string source,uint32_t address);
private:
ks_engine *ks;
ks_err err;
int err2;
TextWindow *log;
Menu *widget;
TextEditWindow *edit;
};
class VMEngine
{
public:
VMEngine(TextWindow *log);
VMEngine(Menu *widget);
void Configure(State *init, std::string code);
void Halt();
void Unconfigure();
uint32_t getNextInstr();
uint32_t getCurrent();
void Run(uint32_t end,uint64_t timeout);
void Run(bool astep, bool acall, uint64_t timeout);
std::string getFlags();
std::string getRegs();
std::vector<std::array<std::string, 5>> getInstr(int segment, int address,int size);
std::vector<std::array<std::string, 4>> getInstr(int segment, int address,int size);
void SetMem(Code *code);
void SetRegs(State *init);
std::string getRam(int segment, int address,int lines, int linesize);
@ -314,6 +315,7 @@ class VMEngine
bool isExecuted();
bool isInitialized();
void setRights(int rights);
void ClearScreen();
int getLine();
uint32_t getEIP();
uint16_t getCS();
@ -324,8 +326,6 @@ class VMEngine
int rights;
void Init();
void Close();
bool executed=false;
bool initialized=false;
uc_engine *uc;
uc_err err;
int bufferaddress;
@ -333,9 +333,9 @@ class VMEngine
uint8_t *code;
uLong crc,crc_old;
std::vector<Code> mcode;
TextWindow *log;
Assembler asmer{log};
Desassembler unasmer{log};
Menu *widget;
Assembler asmer{widget};
Desassembler unasmer{widget};
};
class Menu final : public finalcut::FDialog
@ -351,6 +351,8 @@ class Menu final : public finalcut::FDialog
Menu& operator = (const Menu&) = delete;
// Methods
void loadLevel();
void tolog(std::string str);
void SetScreen(uint16_t x, uint16_t y, char value);
TextWindow log{this};
private:
void onTimer (finalcut::FTimerEvent*) override;
@ -370,6 +372,7 @@ class Menu final : public finalcut::FDialog
void about();
void mini();
void maxi();
void ClearScreen();
void AdjustWindows();
void initWindows();
void initLayout() override;
@ -415,7 +418,7 @@ class Menu final : public finalcut::FDialog
TextWindow screen{this};
TextEditWindow edit{this};
ScenarioWindow scenar{this};
VMEngine vm{&log};
VMEngine vm{this};
};

39
scenarios.json
View File

@ -9,6 +9,7 @@
"niveau_code" : "mov ax,0x545
inc dx
mov esi,0x44440234
syscall
hlt
jmp 0x14D
.org 0x8D
@ -58,15 +59,37 @@ mov es,ax
"niveau_tutoriel" : "Ceci vous...",
"niveau_code" : "mov ax,0x545
_pour:
inc dx
lea ebx,[_pour]
lea si,[msg]
call show
int 21
hlt
show:
push ax
push es
push di
push cx
mov ax,0xB800
mov es,ax
mov di,(80*2+40)*2
mov cx,16
mov al,0
boucle:
movsb
stosb
dec cx
cmp cx,0
jnz boucle
pop cx
pop di
pop es
pop ax
ret
msg:
db 'c','e','c','i',' ','e','s','t',' ','u','n',' ','t','e','s','t',0
.org 0x9000
_pour:
db 0x00
lea eax,[_pour]
mov esi,0x44441234
.org 0x3002
.org 0x1000
hlt",
"niveau_droits" : 10,
"niveau_initial" :