| Re: Function Hooking [message #490170 is a reply to message #490115] |
Sun, 28 December 2014 07:05   |
iRANian
Messages: 4308
Registered: April 2011
Karma:
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General (4 Stars) |
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What you can also do is place a JMP at the very start of the original function to your own hook. Then when you want to call the original function you re-create the first 5 bytes you overwrote in assembly then just jmp 5 bytes into the original function.
function:
push ebp ; byte 1
push edi ; byte 2
push esi ; byte 3
push ebx ; byte 4
push ecx ; byte 5
push edx ; byte 6
Then after jumping hooking:
function:
jmp <hookfunc> ; byte 1-5
push edx ; byte 6
void HookFunc()
{
blabla
}
void _declspec(naked)Call original func()
{
_asm
{
push ebp ; byte 1
push edi ; byte 2
push esi ; byte 3
push ebx ; byte 4
push ecx ; byte 5
jmp to byte 6; where 'push edx' is located
}
}
Long time and well respected Renegade community member, programmer, modder and tester.
Scripts 4.0 private beta tester since May 2011.
My Renegade server plugins releases
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