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https://github.com/HIllya51/LunaHook.git
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45 lines
1.8 KiB
C++
45 lines
1.8 KiB
C++
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#include"Circus1.h"
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/********************************************************************************************
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CIRCUS hook:
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Game folder contains advdata folder. Used by CIRCUS games.
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Usually has font caching issues. But trace back from GetGlyphOutline gives a hook
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which generate repetition.
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If we study circus engine follow Freaka's video, we can easily discover that
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in the game main module there is a static buffer, which is filled by new text before
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it's drawing to screen. By setting a hardware breakpoint there we can locate the
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function filling the buffer. But we don't have to set hardware breakpoint to search
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the hook address if we know some characteristic instruction(cmp al,0x24) around there.
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********************************************************************************************/
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bool InsertCircusHook1() // jichi 10/2/2013: Change return type to bool
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{
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for (DWORD i = processStartAddress + 0x1000; i < processStopAddress - 4; i++)
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if (*(WORD *)i == 0xa3c) //cmp al, 0xA; je
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for (DWORD j = i; j < i + 0x100; j++) {
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BYTE c = *(BYTE *)j;
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if (c == 0xc3)
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break;
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if (c == 0xe8) {
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DWORD k = *(DWORD *)(j+1)+j+5;
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if (k > processStartAddress && k < processStopAddress) {
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HookParam hp;
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hp.address = k;
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hp.offset=get_stack(3);
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hp.split =get_reg(regs::esp);
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hp.type = DATA_INDIRECT|USING_SPLIT;
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ConsoleOutput("INSERT CIRCUS#1");
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//RegisterEngineType(ENGINE_CIRCUS);
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return NewHook(hp, "Circus1");
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}
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}
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}
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//break;
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//ConsoleOutput("Unknown CIRCUS engine");
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ConsoleOutput("CIRCUS1: failed");
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return false;
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}
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bool Circus1::attach_function() {
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return InsertCircusHook1();
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}
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