mirror of
https://github.com/HIllya51/LunaHook.git
synced 2024-10-22 23:18:16 +08:00
221 lines
8.6 KiB
C++
221 lines
8.6 KiB
C++
#include"RUGP.h"
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namespace { // unnamed rUGP
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/********************************************************************************************
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rUGP hook:
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Process name is rugp.exe. Used by AGE/GIGA games.
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Font caching issue. Find call to GetGlyphOutlineA and keep stepping out functions.
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After several tries we comes to address in rvmm.dll and everything is catched.
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We see CALL [E*X+0x*] while EBP contains the character data.
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It's not as simple to reverse in rugp at run time as like reallive since rugp dosen't set
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up stack frame. In other words EBP is used for other purpose. We need to find alternative
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approaches.
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The way to the entry of that function gives us clue to find it. There is one CMP EBP,0x8140
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instruction in this function and that's enough! 0x8140 is the start of SHIFT-JIS
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characters. It's determining if ebp contains a SHIFT-JIS character. This function is not likely
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to be used in other ways. We simply search for this instruction and place hook around.
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********************************************************************************************/
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void SpecialHookRUGP1(hook_stack* stack, HookParam *hp, uintptr_t *data, uintptr_t *split, size_t*len)
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{
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//CC_UNUSED(split);
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DWORD *_stack = (DWORD *)stack->base;
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DWORD i, val;
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for (i = 0; i < 4; i++) {
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val = *_stack++;
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if ((val >> 16) == 0)
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break;
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}
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if (i < 4) {
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hp->offset = i << 2;
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*data = val;
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*len = 2;
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hp->text_fun = nullptr;
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//hp->type &= ~EXTERN_HOOK;
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}
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else
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*len = 0;
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}
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// jichi 10/1/2013: Change return type to bool
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bool InsertRUGP1Hook()
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{
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DWORD low;
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if (!Util::CheckFile(L"rvmm.dll")) {
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ConsoleOutput("rUGP: rvmm.dll does not exist");
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return false;
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}
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//WCHAR str[0x40];
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LPVOID ch = (LPVOID)0x8140;
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enum { range = 0x20000 };
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low = (DWORD)GetModuleHandleW(L"rvmm.dll");
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DWORD t = SearchPattern(low + range, processStopAddress, &ch, 4) + range;
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BYTE *s = (BYTE *)(low + t);
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//if (t) {
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if (t != range) { // jichi 10/1/2013: Changed to compare with 0x20000
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if (*(s - 2) != 0x81)
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return false;
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if (DWORD i = SafeFindEnclosingAlignedFunction((DWORD)s, 0x200)) {
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HookParam hp;
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hp.address = i;
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hp.text_fun = SpecialHookRUGP1;
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hp.type = CODEC_ANSI_BE|USING_CHAR;
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ConsoleOutput("INSERT rUGP#1");
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return NewHook(hp, "rUGP");
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}
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} else {
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t = SearchPattern(low, range, &s, 4);
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if (!t) {
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ConsoleOutput("rUGP: pattern not found");
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//ConsoleOutput("Can't find characteristic instruction.");
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return false;
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}
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s = (BYTE *)(low + t);
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for (int i = 0; i < 0x200; i++, s--)
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if (s[0] == 0x90
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&& *(DWORD *)(s - 3) == 0x90909090) {
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t = low+ t - i + 1;
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//swprintf(str, L"HookAddr 0x%.8x", t);
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//ConsoleOutput(str);
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HookParam hp;
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hp.address = t;
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hp.offset=get_stack(1);
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hp.type = CODEC_ANSI_BE;
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ConsoleOutput("INSERT rUGP#2");
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return NewHook(hp, "rUGP");
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}
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}
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ConsoleOutput("rUGP: failed");
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return false;
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//rt:
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//ConsoleOutput("Unknown rUGP engine.");
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}
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/** rUGP2 10/11/2014 jichi
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*
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* Sample game: マブラヴ オルタネイヂ<E382A4>ヴ ト<>タル・イクリプス
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* The existing rUGP#1/#2 cannot be identified.
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* H-codes:
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* - /HAN-4@1E51D:VM60.DLL
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* - addr: 124189 = 0x1e51d
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* - length_offset: 1
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* - module: 3037492083 = 0xb50c7373
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* - off: 4294967288 = 0xfffffff8 = -8
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* - type: 1092 = 0x444
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* - /HAN-4@1001E51D ( alternative)
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* - addr: 268559645 = 0x1001e51d
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* - length_offset: 1
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* - type: 1028 = 0x404
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*
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* This function is very long.
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* 1001e4b2 ^e9 c0fcffff jmp _18.1001e177
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* 1001e4b7 8b45 14 mov eax,dword ptr ss:[ebp+0x14]
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* 1001e4ba c745 08 08000000 mov dword ptr ss:[ebp+0x8],0x8
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* 1001e4c1 85c0 test eax,eax
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* 1001e4c3 74 3c je short _18.1001e501
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* 1001e4c5 8378 04 00 cmp dword ptr ds:[eax+0x4],0x0
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* 1001e4c9 7f 36 jg short _18.1001e501
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* 1001e4cb 7c 05 jl short _18.1001e4d2
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* 1001e4cd 8338 00 cmp dword ptr ds:[eax],0x0
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* 1001e4d0 73 2f jnb short _18.1001e501
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* 1001e4d2 8b4d f0 mov ecx,dword ptr ss:[ebp-0x10]
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* 1001e4d5 8b91 38a20000 mov edx,dword ptr ds:[ecx+0xa238]
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* 1001e4db 8910 mov dword ptr ds:[eax],edx
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* 1001e4dd 8b89 3ca20000 mov ecx,dword ptr ds:[ecx+0xa23c]
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* 1001e4e3 8948 04 mov dword ptr ds:[eax+0x4],ecx
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* 1001e4e6 eb 19 jmp short _18.1001e501
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* 1001e4e8 c745 08 09000000 mov dword ptr ss:[ebp+0x8],0x9
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* 1001e4ef eb 10 jmp short _18.1001e501
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* 1001e4f1 c745 08 16000000 mov dword ptr ss:[ebp+0x8],0x16
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* 1001e4f8 eb 07 jmp short _18.1001e501
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* 1001e4fa c745 08 1f000000 mov dword ptr ss:[ebp+0x8],0x1f
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* 1001e501 8b45 08 mov eax,dword ptr ss:[ebp+0x8]
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* 1001e504 8ad0 mov dl,al
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* 1001e506 80f2 20 xor dl,0x20
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* 1001e509 80c2 5f add dl,0x5f
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* 1001e50c 80fa 3b cmp dl,0x3b
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* 1001e50f 0f87 80010000 ja _18.1001e695
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* 1001e515 0fb60e movzx ecx,byte ptr ds:[esi]
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* 1001e518 c1e0 08 shl eax,0x8
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* 1001e51b 0bc1 or eax,ecx
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* 1001e51d b9 01000000 mov ecx,0x1 ; jichi: hook here
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* 1001e522 03f1 add esi,ecx
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* 1001e524 8945 08 mov dword ptr ss:[ebp+0x8],eax
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* 1001e527 8975 0c mov dword ptr ss:[ebp+0xc],esi
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* 1001e52a 3d 79810000 cmp eax,0x8179
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* 1001e52f 0f85 9d000000 jnz _18.1001e5d2
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* 1001e535 8b4d f0 mov ecx,dword ptr ss:[ebp-0x10]
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* 1001e538 56 push esi
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* 1001e539 8d55 d0 lea edx,dword ptr ss:[ebp-0x30]
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* 1001e53c 52 push edx
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* 1001e53d e8 0e0bffff call _18.1000f050
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* 1001e542 8d4d d0 lea ecx,dword ptr ss:[ebp-0x30]
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* 1001e545 c745 fc 07000000 mov dword ptr ss:[ebp-0x4],0x7
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* 1001e54c ff15 500a0e10 call dword ptr ds:[0x100e0a50] ; _19.6a712fa9
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* 1001e552 84c0 test al,al
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* 1001e554 75 67 jnz short _18.1001e5bd
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* 1001e556 8b75 f0 mov esi,dword ptr ss:[ebp-0x10]
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* 1001e559 8d45 d0 lea eax,dword ptr ss:[ebp-0x30]
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* 1001e55c 50 push eax
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* 1001e55d 8bce mov ecx,esi
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* 1001e55f c745 e4 01000000 mov dword ptr ss:[ebp-0x1c],0x1
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* 1001e566 c745 e0 00000000 mov dword ptr ss:[ebp-0x20],0x0
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* 1001e56d e8 5e80ffff call _18.100165d0
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* 1001e572 0fb7f8 movzx edi,ax
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* 1001e575 57 push edi
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* 1001e576 8bce mov ecx,esi
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* 1001e578 e8 c380ffff call _18.10016640
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* 1001e57d 85c0 test eax,eax
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* 1001e57f 74 0d je short _18.1001e58e
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* 1001e581 f640 38 02 test byte ptr ds:[eax+0x38],0x2
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* 1001e585 74 07 je short _18.1001e58e
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* 1001e587 c745 e0 01000000 mov dword ptr ss:[ebp-0x20],0x1
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* 1001e58e 837d bc 10 cmp dword ptr ss:[ebp-0x44],0x10
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* 1001e592 74 29 je short _18.1001e5bd
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* 1001e594 8b43 28 mov eax,dword ptr ds:[ebx+0x28]
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* 1001e597 85c0 test eax,eax
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*/
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bool InsertRUGP2Hook()
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{
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auto module = GetModuleHandleW(L"vm60.dll");
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if (!module /*|| !SafeFillRange(L"vm60.dll", &low, &high)*/) {
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ConsoleOutput("rUGP2: vm60.dll does not exist");
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return false;
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}
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const BYTE bytes[] = {
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0x0f,0xb6,0x0e, // 1001e515 0fb60e movzx ecx,byte ptr ds:[esi]
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0xc1,0xe0, 0x08, // 1001e518 c1e0 08 shl eax,0x8
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0x0b,0xc1, // 1001e51b 0bc1 or eax,ecx
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0xb9, 0x01,0x00,0x00,0x00, // 1001e51d b9 01000000 mov ecx,0x1 ; jichi: hook here
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0x03,0xf1, // 1001e522 03f1 add esi,ecx
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0x89,0x45, 0x08, // 1001e524 8945 08 mov dword ptr ss:[ebp+0x8],eax
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0x89,0x75, 0x0c // 1001e527 8975 0c mov dword ptr ss:[ebp+0xc],esi
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};
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enum { addr_offset = 0x1001e51d - 0x1001e515 };
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ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), (DWORD)module, Util::QueryModuleLimits(module).second);
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//GROWL_DWORD(addr);
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if (!addr) {
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ConsoleOutput("rUGP2: pattern not found");
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return false;
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}
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HookParam hp;
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hp.address = addr + addr_offset;
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hp.offset=get_reg(regs::eax);
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hp.type = NO_CONTEXT|CODEC_ANSI_BE;
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ConsoleOutput("INSERT rUGP2");
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return NewHook(hp, "rUGP2");
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}
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} // unnamed namespace
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bool InsertRUGPHook()
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{ return InsertRUGP1Hook() || InsertRUGP2Hook(); }
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bool RUGP::attach_function() {
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return InsertRUGPHook();
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}
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