[teh ORiON]

Hi,

I'm trying to hook this function:

SoundPointerForIndex

PHP Code:

//=========================================================
// SoundPointerForIndex - returns a pointer to the instance
// of CSound at index's position in the sound pool.
//=========================================================
CSound*    CSoundEnt :: SoundPointerForIndex( int iIndex )
{
    if ( !pSoundEnt )
    {
        return NULL;
    }

    if ( iIndex > ( MAX_WORLD_SOUNDS - 1 ) )
    {
        ALERT ( at_console, "SoundPointerForIndex() - Index too large!\n" );
        return NULL;
    }

    if ( iIndex < 0 )
    {
        ALERT ( at_console, "SoundPointerForIndex() - Index < 0!\n" );
        return NULL;
    }

    return &pSoundEnt->m_SoundPool[ iIndex ];
} 


And here's the signature for it:

Signature

PHP Code:

{
    "name" : "SoundPointerForIndex",
    "class" : "CSoundEnt",
    "library" : "mod",
    "arguments" :
    [
        {
            "type" : "int"
        }
    ],
    "return" : 
    {
        "type" : "CSound *"
    },
    "identifiers" : 
    [
        {
            "os"    : "windows",
            "mod"   : "tfc",
            "value" : [0x8B,"*","*","*","*","*",0x85,"*",0x75,"*",0x33,"*",0xC3,0x8B,"*","*","*",0x83,"*","*",0x7E,"*",0x68,"*","*","*","*",0x6A,"*"]
        }
    ]
} 


The signature is found and argument/return validates just fine.
However when I register a hook for the function it crashes on mapload and I'm not quite sure why, as the signature should be solid.

For search in IDA "8B ? ? ? ? ? 85 ? 75 ? 33 ? C3 8B ? ? ? 83 ? ? 7E ? 68 ? ? ? ? 6A ?"

[Arkshine]

Function is static so you should hook it like a no-class function.

[teh ORiON]

I tried, same story, crashes on load, unless Im doing something wrong:

Sig

PHP Code:

{
    "name" : "SoundPointerForIndex",
    "library" : "mod",
    "arguments" :
    [
        {
            "type" : "int"
        }
    ],
    "return" : 
    {
        "type" : "CSound *"
    },
    "identifiers" : 
    [
        {
            "os"    : "windows",
            "mod"   : "tfc",
            "value" : [0x8B,"*","*","*","*","*",0x85,"*",0x75,"*",0x33,"*",0xC3,0x8B,"*","*","*",0x83,"*","*",0x7E,"*",0x68,"*","*","*","*",0x6A,"*"]
        }
    ]
} 


Pawn

PHP Code:

OrpheuRegisterHook(OrpheuGetFunction("SoundPointerForIndex"),"SoundPointerForIndex",OrpheuHookPre)

public OrpheuHookReturn:SoundPointerForIndex(iSound, iIndex)
{
    return OrpheuIgnored
} 


[Arkshine]

Replace "CSound *" by "pointer", the former is not a class associated to an entity.

Signature works for cstrike as well, and you can cut after 0x83.

[teh ORiON]

Thanks a bunch, works well!