find-centityidentity-setentityname

name	find-CEntityIdentity_SetEntityName
description	Find and identify the CEntityIdentity_SetEntityName function in CS2 binary using IDA Pro MCP. Use this skill when reverse engineering CS2 server.dll or libserver.so to locate the SetEntityName function on CEntityIdentity, which sets the targetname of an entity. Triggers: CEntityIdentity_SetEntityName, SetEntityName, entity name, set entity name
disable-model-invocation	true

CEntityIdentity_SetEntityName Function Location Workflow

Overview

This workflow locates CEntityIdentity_SetEntityName in CS2 server binary files. This function sets the targetname (entity name) on a CEntityIdentity object. It is called from a V8 script binding wrapper that logs "Entity" / "SetEntityName".

Location Steps

1. Search for Signature Strings

Use find_regex to search for the SetEntityName string:

mcp__ida-pro-mcp__find_regex(pattern="SetEntityName")

Expected result: Find string addresses containing "SetEntityName".

2. Find Cross-References

Use xrefs_to to find locations that reference the "SetEntityName" string:

mcp__ida-pro-mcp__xrefs_to(addrs="<string_addr>")

Expected result: Find the V8 binding wrapper function that references "SetEntityName" multiple times alongside "Entity".

3. Decompile the V8 Binding Wrapper

Decompile the function found in step 2 and locate the following code pattern:

if ( *(int *)(a1 + 16) >= 1 )
{
    v16 = 0LL;
    if ( (unsigned __int8)sub_XXXXX(v17) )
    {
      v14 = byte_XXXXX;
      if ( v16 )
        v14 = v16;
      sub_XXXXX(*(_QWORD *)(v13 + 16), (__int64)v14);  // <-- This is CEntityIdentity_SetEntityName
    }
    else if ( (unsigned __int8)LoggingSystem_IsChannelEnabled(...) )
    {
      LoggingSystem_Log(..., "Method %s.%s invoked with bad %s value. (parameter #%d)\n",
        "Entity", "SetEntityName", "name", 0);
    }
}
else if ( (unsigned __int8)LoggingSystem_IsChannelEnabled(...) )
{
    LoggingSystem_Log(..., "Method %s.%s requires %d argument(s), %s.",
      "Entity", "SetEntityName", 1, "(name: string)");
}

Key identification: CEntityIdentity_SetEntityName is the call sub_XXXXX(*(_QWORD *)(v13 + 16), v14) that takes 2 parameters — the entity identity pointer (obtained via *(_QWORD *)(v13 + 16)) and the name string. It appears inside the success branch after the V8 argument validation, right before the bad-value error log that mentions "name" as parameter #0.

4. Rename Function

Use rename to give the function a meaningful name:

mcp__ida-pro-mcp__rename(batch={"func": {"addr": "<SetEntityName_func_addr>", "name": "CEntityIdentity_SetEntityName"}})

5. Generate and Validate Unique Signature

ALWAYS Use SKILL /generate-signature-for-function to generate a robust and unique signature for the function.

6. Write IDA Analysis Output as YAML

ALWAYS Use SKILL /write-func-as-yaml to write the analysis results.

Required parameters:

• func_name: CEntityIdentity_SetEntityName
• func_addr: The function address from step 3
• func_sig: The validated signature from step 5

Function Characteristics

The CEntityIdentity_SetEntityName function:

• Is not a virtual function (no vtable lookup needed)
• Takes 2 parameters: (CEntityIdentity* identity, const char* name)
• Is called from a V8 script binding wrapper that logs "Entity" / "SetEntityName"
• The first argument is the entity identity pointer accessed via *(_QWORD *)(entity + 16) (offset 0x10 from the entity instance)
• The wrapper also references the argument descriptor string "(name: string)"

Output YAML Format

The output YAML filename depends on the platform:

• server.dll → CEntityIdentity_SetEntityName.windows.yaml
• libserver.so / libserver.so → CEntityIdentity_SetEntityName.linux.yaml