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more mono hooks

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This commit is contained in:
Akash Mozumdar 2019-02-12 23:54:46 -05:00
parent 551d5ba49d
commit 99d7d69b75
2 changed files with 40 additions and 3 deletions
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33
vnrhook/engine/engine.cc
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@ -16593,6 +16593,38 @@ bool InsertMonoHook()
return found;
}
void InsertMonoHook3()
{
const BYTE bytes[] = { // Characteristic pattern of System.String.CharCopy in Venus Blood Lagoon https://vndb.org/v23125 and レイジングループ
// Cheat Engine 'Dissect Mono' feature is very useful in finding Mono hooks. Gives functions to look at in the stacktrace
0x55, // push ebp
0x8b, 0xec, // mov ebp,esp
0x53, // push ebx
0x57, // push edi
0x56, // push esi
0x83, 0xec, 0x0c, // sub esp,0x0c
0x8b, 0x5d, 0x08, // mov ebx,[ebp+0x08] ; wchar_t*
0x8b, 0x75, 0x0c, // mov esi,[ebp+0x0c] ; length
0x8b, 0x7d, 0x10, // mov edi,[ebp+0x10] ; ?
0x8b, 0xc3, // mov eax,ebx
0x0b, 0xc6, // or eax,esi
0x25, 0x03, 0x00, 0x00, 0x00, // and eax,0x03
0x85, 0xc0, // test eax,eax
0x0f, 0x84, XX4, // je ??
0x8b, 0xc3, // mov eax,ebx
0x25, 0x02, 0x00, 0x00, 0x00 // and eax,0x02
};
for (auto addr : Util::SearchMemory(bytes, sizeof(bytes), PAGE_EXECUTE_READWRITE))
{
HookParam hp = {};
hp.address = addr;
hp.type = USING_UNICODE | USING_STRING;
hp.offset = 8;
hp.length_offset = 3;
NewHook(hp, "Mono3");
}
}
/** jichi 12/26/2014 Mono
* Sample game: [141226] ハ<EFBFBD>レ<EFBFBD>めいと
*/
@ -16632,6 +16664,7 @@ bool InsertMonoHooks()
InsertBaldrHook(); // Artikash 8/28/2018: insert for all mono games: maybe itll work for more than baldr sky zero?
InsertMonoHook(); // Artikash 10/20/2018: dunno why this was removed, works for some stuff so readd
InsertMonoHook3();
bool ret = false;
// mono_unichar2* mono_string_to_utf16 (MonoString *s);

10
vnrhook/engine/mono/funcinfo.h
View File

@ -33,10 +33,10 @@
// gchar* mono_unicode_to_external (const gunichar2 *uni);
// gchar* mono_utf8_from_external (const gchar *in);
struct MonoFunction {
struct MonoFunction { // argument indices start from 0 for SpecialHookMonoString, otherwise 1
const char *functionName;
size_t textIndex; // argument index, starting from 0
size_t lengthIndex; // argument index, start from 0
size_t textIndex; // argument index
short lengthIndex; // argument index
unsigned long hookType; // HookParam type
void *text_fun; // HookParam::text_fun_t
};
@ -47,13 +47,17 @@ struct MonoFunction {
, { "mono_string_to_utf16", 0, 0, USING_UNICODE|NO_CONTEXT, SpecialHookMonoString } \
, { "mono_string_intern", 0, 0, USING_UNICODE|NO_CONTEXT, SpecialHookMonoString } \
, { "mono_string_is_interned", 0, 0, USING_UNICODE|NO_CONTEXT, SpecialHookMonoString } \
, { "mono_marshal_string_to_utf16", 0, 0, USING_UNICODE|NO_CONTEXT, SpecialHookMonoString } \
, { "mono_string_hash", 0, 0, USING_UNICODE, SpecialHookMonoString } \
, { "mono_string_chars", 0, 0, USING_UNICODE, SpecialHookMonoString } \
, { "mono_string_length", 0, 0, USING_UNICODE, SpecialHookMonoString } \
, { "mono_utf8_from_external", 1, 0, USING_STRING|USING_UTF8, nullptr } \
, { "mono_string_from_utf16", 1, 0, USING_UNICODE, nullptr } \
, { "mono_string_new_utf16", 2, 3, USING_UNICODE, nullptr } \
, { "mono_unicode_from_external", 1, 0, USING_UNICODE, nullptr } \
, { "mono_unicode_to_external", 1, 0, USING_UNICODE, nullptr } \
, { "mono_string_new", 2, 0, USING_STRING|USING_UTF8, nullptr } \
, { "mono_string_new_len", 2, 3, USING_STRING|USING_UTF8, nullptr } \
, { "mono_string_new_wrapper", 1, 0, USING_STRING|USING_UTF8, nullptr }
// EOF