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//////////////////////////////////////////////////////////////////////////////
// emudebug.cpp //
//////////////////////////////////////////////////////////////////////////////
/*
EmuDebug by Rafael Vuijk (aka Dark Fader)
see emudebug.txt for more info
*/
//////////////////////////////////////////////////////////////////////////////
// Includes //
//////////////////////////////////////////////////////////////////////////////
#include <windows.h>
#include <stdio.h>
#include <conio.h>
//////////////////////////////////////////////////////////////////////////////
// Pragmas //
//////////////////////////////////////////////////////////////////////////////
#pragma comment(lib, "user32")
//////////////////////////////////////////////////////////////////////////////
// Defines //
//////////////////////////////////////////////////////////////////////////////
#define VER "1.02"
//////////////////////////////////////////////////////////////////////////////
// Variables //
//////////////////////////////////////////////////////////////////////////////
// set in InitDebug
HWND hDebugWnd = 0;
HWND hEmuWnd = 0;
HANDLE hProcess = 0;
// set in ScanBuffer
void *debugBufferBeginAddr = 0;
void *debugBufferEndAddr = 0;
void *debugBufferDataAddr = 0;
int debugBufferDataSize = 0;
char *debugBufferData = 0; // temp. data
// default options
int minDebugBufferSize = 31;
int maxDebugBufferSize = 16*1024;
int pollInterval = 10;
int priorityClass = NORMAL_PRIORITY_CLASS;
char windowClass[256] = "BOYCOTTADVANCE"; // :)
char windowTitle[256] = "BoycottAdvance - ";
bool waitForKey = false;
//////////////////////////////////////////////////////////////////////////////
// InitDebug //
//////////////////////////////////////////////////////////////////////////////
int InitDebug()
{
// minimize debug window
//ShowWindow(hDebugWnd, SW_MINIMIZE); //ph0x
restart:
printf("Searching debugging target...");
char *pWindowClass = windowClass[0] ? windowClass : 0;
char *pWindowTitle = windowTitle[0] ? windowTitle : 0;
// loop
while (1)
{
hEmuWnd = FindWindow(pWindowClass, pWindowTitle);
//if (!hEmuWnd) { printf("Can't find window!\n"); return -1; }
if (hEmuWnd) break;
if (kbhit() && (getch() == 27)) return -1; // abort?
Sleep(20);
}
DWORD processId = 0;
GetWindowThreadProcessId(hEmuWnd, &processId);
if (!processId) { printf("Can't get process ID!\n"); return -1; }
hProcess = OpenProcess(PROCESS_ALL_ACCESS, TRUE, processId);
if (!hProcess) { printf("Can't open process!\n"); return -1; }
SetPriorityClass(hProcess, priorityClass); // set process priority class
printf(" done.\n");
int bufferSize = 1*1024*1024; // start with 1MB or so
char *buffer = new char[bufferSize]; // temp ReadProcessMemory buffer
if (!waitForKey) printf("Searching debug buffer...");
// loop
while (1)
{
if (waitForKey)
{
printf("Press any key to begin searching for debug buffer...");
getch();
printf("\n");
printf("Searching debug buffer...");
}
DWORD exitCode;
if (!GetExitCodeProcess(hProcess, &exitCode)) { printf("\n"); goto restart; }
if (exitCode != STILL_ACTIVE) { printf("\n"); goto restart; }
bool something = false; // some data found?
MEMORY_BASIC_INFORMATION mbi;
unsigned int addr;
for (addr=0; VirtualQueryEx(hProcess, (void*)addr, &mbi, sizeof(mbi)); addr = (unsigned int)mbi.BaseAddress + mbi.RegionSize)
{
//printf("base=%08X, size=%d, protect=%08X, type=%08X\n", mbi.BaseAddress, mbi.RegionSize, mbi.Protect, mbi.Type);
if (mbi.Type == MEM_PRIVATE) // type=00020000
if (mbi.Protect == PAGE_READWRITE) // protect=00000004
{
if (mbi.RegionSize > bufferSize)
{
delete buffer;
bufferSize = mbi.RegionSize * 3/2;
buffer = new char[bufferSize];
}
if (ReadProcessMemory(hProcess, mbi.BaseAddress, buffer, mbi.RegionSize, NULL))
{
something = true;
for (unsigned int i=0; i<mbi.RegionSize; i += minDebugBufferSize-2)
{
if (buffer[i] == ' ') // might be somewhere in the buffer
{
//printf("scan left\n");
// scan to left
int left = i;
while (buffer[left] == ' ') if (--left <= 0) { continue; } // nothing left
if (buffer[left] != '{') { continue; } // nope, wrong start
//printf("scan right\n");
// scan to right
int right = i;
while (buffer[right] == ' ') if (++right >= mbi.RegionSize) { i = right; continue; } // nothing left
if (buffer[right] != '}') { i = right; continue; } // nope, wrong end
// alloc new temp. debug buffer with max debug buffer length
debugBufferDataSize = right - left + 1;
//printf("debugBufferDataSize = %d\n", debugBufferDataSize);
if (
(debugBufferDataSize >= minDebugBufferSize) && // minimum size
(debugBufferDataSize <= maxDebugBufferSize) && // maximum size
(*(unsigned int *)(buffer + left - 8) == 0xEDEBEDEB) && // start
(*(unsigned int *)(buffer + left - 4) == 0xEDEBEDEB) // end
)
{
// remember addresses
debugBufferBeginAddr = (void *)((int)mbi.BaseAddress + left - 8);
debugBufferEndAddr = (void *)((int)mbi.BaseAddress + left - 4);
debugBufferDataAddr = (void *)((int)mbi.BaseAddress + left - 0);
// allocate temporary buffer
if (debugBufferData) delete debugBufferData;
debugBufferData = new char[debugBufferDataSize];
// start debugging
int n = 0;
WriteProcessMemory(hProcess, debugBufferBeginAddr, &n, sizeof(n), NULL);
WriteProcessMemory(hProcess, debugBufferEndAddr, &n, sizeof(n), NULL);
// show done
printf(" done.\n");
delete buffer;
//printf("base=%08X, size=%d, protect=%08X, type=%08X\n", mbi.BaseAddress, mbi.RegionSize, mbi.Protect, mbi.Type);
// do things to activate/show debugger
ShowWindow(hEmuWnd, SW_RESTORE); //ph0x
SetActiveWindow(hEmuWnd); //ph0x
SetForegroundWindow(hEmuWnd); //ph0x
FlashWindow(hDebugWnd, TRUE);
SetWindowPos(hDebugWnd, HWND_TOP, 0,0,0,0, SWP_NOMOVE|SWP_NOSIZE);
return 0; // ok
}
} // ' '
} // for
} // ReadProcessMemory
else
{
// can't read memory anymore
//printf("\n"); goto restart;
}
//printf("\n");
} // type
} // for VirtualQueryEx
if (waitForKey) printf("\n");
//if (!addr) { printf("\n"); goto restart; } // no VirtualQueryEx data
//if (!something) { printf("\n"); goto restart; } // invalid process or something
if (kbhit() && (getch() == 27)) break; // abort
Sleep(20);
} // while
delete buffer;
return -1;
}
//////////////////////////////////////////////////////////////////////////////
// ShowHelp //
//////////////////////////////////////////////////////////////////////////////
void ShowHelp()
{
printf("EmuDebug "VER" by Rafael Vuijk (aka Dark Fader)\n\n");
printf("Flags:\n");
printf(" -h -? Show this help.\n");
printf(" -b Set emulator process to below priority class.\n");
printf(" -i Set emulator process to idle priority class.\n");
printf(" -p<n> Set polling interval in milliseconds.\n");
printf(" -c[<n>] Window class name to find. Default: \"BOYCOTTADVANCE\".\n");
printf(" You can use MS Spy++ or something to find this.\n");
printf(" -t[<n>] Window title name to find. Default: \"BoycottAdvance - \".\n");
printf(" -s<n> Set mininum debug buffer size to look for.\n");
printf(" -k Wait for a key to commence searching.\n");
printf("\n");
printf("Some 'good' working examples:\n");
printf(" emudebug -i -p100 -s127\n");
printf(" emudebug -p20 -k -b -c\"\" -t\"VGBA-Windows 1.1r\" -s63\n");
}
//////////////////////////////////////////////////////////////////////////////
// main //
//////////////////////////////////////////////////////////////////////////////
int main(int argc, char *argv[])
{
// check parameters
for (int a=1; a<argc; a++)
{
if (argv[a][0] == '-')
switch (argv[a][1])
{
case 'h': case '?': ShowHelp(); return 0;
case 'i': priorityClass = IDLE_PRIORITY_CLASS; break;
//case 'b': priorityClass = BELOW_NORMAL_PRIORITY_CLASS; break; //ph0x
case 'p': pollInterval = strtoul(argv[a]+2, NULL, 0); break;
case 'c': strcpy(windowClass, argv[a]+2); break;
case 't': strcpy(windowTitle, argv[a]+2); break;
case 's': minDebugBufferSize = strtoul(argv[a]+2, NULL, 0); break;
case 'k': waitForKey = true; break;
default: printf("Unknown uption: %c\n", argv[a][1]); break;
}
}
// find debug window
SetConsoleTitle("EmuDebug Console");
hDebugWnd = FindWindow(NULL, "EmuDebug Console");
// search for debug buffer
if (InitDebug()) return -1;
// do debug console
int boostPollInterval = pollInterval;
while (1)
{
// check keyboard input
if (kbhit())
{
char c = getch();
if (c == 27) // escape
{
// try to close emulator & minimize debug window
SendMessage(hEmuWnd, WM_CLOSE, 0, 0);
SendMessage(hDebugWnd, WM_CLOSE, 0, 0); //ph0x
//SetWindowPos(hDebugWnd, HWND_TOP, 0,0,0,0, SWP_HIDEWINDOW|SWP_NOMOVE|SWP_NOSIZE);
//ShowWindow(hDebugWnd, SW_MINIMIZE); //ph0x
}
}
// get begin/end from debug buffer
int end = 0;
if (!ReadProcessMemory(hProcess, (void *)debugBufferEndAddr, &end, sizeof(end), NULL))
{
// re-init debug after failure
if (InitDebug()) break;
continue;
}
int begin = 0;
ReadProcessMemory(hProcess, (void *)debugBufferBeginAddr, &begin, sizeof(begin), NULL);
// some data?
if (begin != end)
{
unsigned int nextBegin;
while (1) //begin != end)
{
int begin = end;
ReadProcessMemory(hProcess, (void *)debugBufferBeginAddr, &begin, sizeof(begin), NULL);
if (begin == end) break; // no more data
nextBegin = begin + 1;
if (nextBegin >= debugBufferDataSize) nextBegin = 0;
char c;
ReadProcessMemory(hProcess, (void *)((int)debugBufferDataAddr + begin), &c, 1, NULL);
putchar(c);
begin = nextBegin;
WriteProcessMemory(hProcess, debugBufferBeginAddr, &begin, sizeof(begin), NULL);
}
// boost poll interval
boostPollInterval /= 2;
}
else
{
// slow down again
if (boostPollInterval == 0) boostPollInterval = 1; else boostPollInterval *= 2;
if (boostPollInterval > pollInterval) boostPollInterval = pollInterval;
}
// poll interval
Sleep(boostPollInterval);
}
// clean up
if (debugBufferData) delete debugBufferData;
CloseHandle(hProcess);
return 0;
}
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