find-CBaseModelEntity_SetModel

Find CBaseModelEntity_SetModel

Locate CBaseModelEntity_SetModel in CS2 server.dll or server.so using IDA Pro MCP tools.

Method

1. Search for a known model path string:

   mcp__ida-pro-mcp__find_regex pattern="weapons/models/defuser/defuser\.vmdl"
   

   • You should ALWAYS use single back-slash here instead of double back-slash(which means you should go with escaped dot).

2. Get cross-references to the string:

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

3. Decompile the referencing functions to identify which one calls SetModel:

   mcp__ida-pro-mcp__decompile addr="<function_addr>"
   

   Look for a function that takes (this, model_path) as parameters and is called early in entity initialization.

4. Identify the SetModel function from the decompiled code. It will be called like:

   sub_XXXXXX(a1, "weapons/models/defuser/defuser.vmdl");
   

   The first argument is the entity pointer, second is the model path.

5. Get function info:

   mcp__ida-pro-mcp__lookup_funcs queries="<setmodel_func_addr>"
   

6. Rename the function:

   mcp__ida-pro-mcp__rename batch={"func": {"addr": "<function_addr>", "name": "CBaseModelEntity_SetModel"}}
   

7. Generate and validate unique signature:

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

8. Write IDA analysis output as YAML beside the binary:

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

   Required parameters:

   • func_name: CBaseModelEntity_SetModel
   • func_addr: The function address from step 5
   • func_sig: The validated signature from step 7

Signature Pattern

The function is called with a model path string as the second parameter:

CBaseModelEntity_SetModel(entity_ptr, "path/to/model.vmdl");

Common model paths that reference this function:

• weapons/models/defuser/defuser.vmdl
• Other .vmdl model paths in entity spawn/initialization code

Function Characteristics

• Parameters: (this, model_path) where this is CBaseModelEntity pointer, model_path is the VMDL model path string
• Purpose: Sets the visual model for an entity
• Called by: Entity spawn functions, item drop functions, weapon equip functions

Output YAML Format

The output YAML filename depends on the platform:

• server.dll → CBaseModelEntity_SetModel.windows.yaml
• server.so → CBaseModelEntity_SetModel.linux.yaml

func_va: 0x142de40       # Virtual address of the function - This can change when game updates.
func_rva: 0x142de40      # Relative virtual address (VA - image base) - This can change when game updates.
func_size: 0x3d          # Function size in bytes - This can change when game updates.
func_sig: XX XX XX XX XX # Unique byte signature for pattern scanning - This can change when game updates.