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https://github.com/HIllya51/LunaHook.git
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82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
#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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namespace{
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//C.D.C.D.2～シーディーシーディー2～
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//https://vndb.org/v947
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bool circus12()
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{
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BYTE sig[]={
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0x3C,0x24,
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0x0F,0x85,XX4,
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0x8A,0x47,0x01,
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0x47,
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0x3C,0x6E,
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0x75,XX,
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0xA0,XX4,
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0xB9,XX4,
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0x84,0xC0,
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0x0F,0x84,XX4,
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0x88,0x06,
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0x8A,0x41,0x01,
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0x46,
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0x41,
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0x84,0xC0,
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0x75,XX,
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0xE9,XX4,
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0x3C,0x66,
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0x75,XX
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};
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auto addr=MemDbg::findBytes(sig,sizeof(sig),processStartAddress,processStopAddress);
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if(!addr)return false;
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addr=MemDbg::findEnclosingAlignedFunction(addr,0x40);
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if(!addr)return false;
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HookParam hp;
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hp.address =addr;
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hp.offset=get_stack(2);
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hp.type = USING_STRING|EMBED_ABLE|EMBED_AFTER_NEW|EMBED_BEFORE_SIMPLE|EMBED_DYNA_SJIS;
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hp.hook_font=F_GetGlyphOutlineA;
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return NewHook(hp, "Circus1");
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}
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}
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bool Circus1::attach_function() {
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return InsertCircusHook1()|circus12();
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}
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