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final form usercall detour!!

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ineed bots 2023-04-29 14:39:37 -06:00
parent ffa637e8a7
commit 599bc5664f
1 changed files with 7 additions and 18 deletions
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25
src/component/test.cpp
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@ -95,36 +95,25 @@ namespace test
}
}
unsigned int __stdcall scr_getentityid_call(void* caller_addr, game::scriptInstance_t inst, game::classNum_e classnum, unsigned int clientnum, unsigned int entnum)
unsigned int scr_getentityid_call(unsigned int entnum, [[maybe_unused]] void* caller_addr, game::scriptInstance_t inst, game::classNum_e classnum, unsigned int clientnum)
{
printf("scr_getentityid_call: called from %p\n", caller_addr);
// minhook allocated space for the original asm, we want to execute that instead because the original gamecode has the jump from the detour
return game::Scr_GetEntityId(inst, entnum, classnum, clientnum, scr_getentityid_hook.get_original());
}
unsigned int __declspec(naked) __cdecl scr_getentityid_stub(game::scriptInstance_t inst, game::classNum_e classnum, unsigned int clientnum)
unsigned int __declspec(naked) scr_getentityid_stub()
{
// 00692520 unsigned int __usercall Scr_GetEntityId@<eax>(unsigned int entnum@<eax>, scriptInstance_t inst, classNum_e classnum, unsigned int clientnum)
__asm
{
// prol
push ebp;
mov ebp, esp;
// eax is a param, lets push it!
push eax;
// push shit for our call, remember eax is a param in the usercall, rest was on stack
// we can access params like this in naked because we correctly setup the ebp
push eax;
push clientnum;
push classnum;
push inst;
mov eax, [ebp + 4]; // caller address! where did we get called from?
push eax;
// ok so scr_getentityid_call intentionally has more params than it should, so we can access everything on the stack
call scr_getentityid_call;
// we made this a __stdcall, so we dont need to clean up stack
// epil
mov esp, ebp;
pop ebp;
// clean up and return
add esp, 4;
ret;
}
}