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fix bugs of softice.ASM, "Execution Timing", and "Guard Pages". #1

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fix bugs of softice.ASM, "Execution Timing", and "Guard Pages". #1

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26 changes: 26 additions & 0 deletions ASMsrc/guardpage.ASM
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Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
include 'win32ax.inc'

.code

start:
xor ebx, ebx
invoke VirtualAlloc,ebx,1,1000h,40h
mov byte [eax], 0c3h
push eax
xchg ebp, eax
invoke VirtualProtect,ebp,1,140h,esp
push .exit
push dword [fs:ebx]
mov [fs:ebx], esp
push .being_debugged
;execution resumes at being_debugged
;if ret instruction is executed
jmp ebp
.being_debugged:
invoke MessageBox,HWND_DESKTOP,"Debugger Found!",invoke GetCommandLine,MB_OK
invoke ExitProcess, 0
.exit:
invoke MessageBox,HWND_DESKTOP,"Debugger Not Found!",invoke GetCommandLine,MB_OK
invoke ExitProcess,0

.end start
3 changes: 2 additions & 1 deletion ASMsrc/softice.ASM
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Original file line number Diff line number Diff line change
Expand Up @@ -16,9 +16,10 @@ include 'win32ax.inc'

start:
xor eax, eax
push .exception
push dword [fs:0]
mov [fs:0],esp
int1
int 1
.exception:
mov eax,[esp+0x4]
cmp dword[eax], 0x80000004
Expand Down
18 changes: 9 additions & 9 deletions Csrc/fcall_examples/fcall_examples/fcall_examples.cpp
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Expand Up @@ -578,7 +578,7 @@ void sGetTickCount() {

initial = GetTickCount();
end = GetTickCount();
if ((initial - end) >= 10)
if ((end - initial) >= 10)
printf("Debugger detected\n");
else
printf("Debugger not detected\n");
Expand All @@ -592,7 +592,7 @@ void stimeGetTime() {

initial = timeGetTime();
end = timeGetTime();
if ((initial - end) >= 10)
if ((end - initial) >= 10)
printf("Debugger detected\n");
else
printf("Debugger not detected\n");
Expand All @@ -608,7 +608,7 @@ void sGetSystemTime() {
GetSystemTime(&end);
SystemTimeToFileTime(&initial, &finitial);
SystemTimeToFileTime(&end, &fend);
if (((finitial.dwHighDateTime - fend.dwHighDateTime) > 10) || ((finitial.dwLowDateTime - fend.dwLowDateTime) > 10))
if (((fend.dwHighDateTime - finitial.dwHighDateTime) > 10) || ((fend.dwLowDateTime - finitial.dwLowDateTime) > 10))
printf("Debugger detected\n");
else
printf("Debugger not detected\n");
Expand All @@ -624,7 +624,7 @@ void sGetLocalTime() {
GetLocalTime(&end);
SystemTimeToFileTime(&initial, &finitial);
SystemTimeToFileTime(&end, &fend);
if (((finitial.dwHighDateTime - fend.dwHighDateTime) > 10) || ((finitial.dwLowDateTime - fend.dwLowDateTime) > 10))
if (((fend.dwHighDateTime - finitial.dwHighDateTime) > 10) || ((fend.dwLowDateTime - finitial.dwLowDateTime) > 10))
printf("Debugger detected\n");
else
printf("Debugger not detected\n");
Expand All @@ -641,7 +641,7 @@ void sQueryPerformanceCounter() {
if (QueryPerformanceCounter(&end)) {
printf("\ninitial.LowPart %02d \n" , initial.LowPart);
printf("\nend.LowPart %02d \n" , end.LowPart);
if ((initial.QuadPart - end.QuadPart) > 0x10)
if ((end.QuadPart - initial.QuadPart) > 0x10)
printf("Debugger detected\n");
else
printf("Debugger not detected\n");
Expand Down Expand Up @@ -750,7 +750,7 @@ int _tmain(int argc, _TCHAR* argv[])
printf("19 - 3.19 FindWindow\n");
printf("20 - 3.20 SuspendThread\n");
printf("21 - 3.23 UnhandledExceptionFilter\n");
printf("22 - 3.24 Guard Pages\n");
//printf("22 - 3.24 Guard Pages\n");
printf("23 - 3.25 Execution Timing - GetTickCount()\n");
printf("24 - 3.25 Execution Timing - timeGetTime\n");
printf("25 - 3.25 Execution Timing - GetSystemTime()\n");
Expand Down Expand Up @@ -825,9 +825,9 @@ int _tmain(int argc, _TCHAR* argv[])
case 21:
fSetUnhandledExceptionFilter();
break;
case 22:
ret = psVirtuaAlloc_VirtualProtect();
break;
// case 22:
// ret = psVirtuaAlloc_VirtualProtect();
// break;
case 23:
sGetTickCount();
break;
Expand Down