find-ccsplayer-itemservices-removeweapons

name	find-CCSPlayer_ItemServices_RemoveWeapons
description	Find and identify the CCSPlayer_ItemServices_RemoveWeapons function in CS2 binary using IDA Pro MCP. Use this skill when reverse engineering CS2 server.dll or server.so to locate the RemoveWeapons virtual function in the CCSPlayer_ItemServices vtable. Trigger: CCSPlayer_ItemServices_RemoveWeapons
disable-model-invocation	true

CCSPlayer_ItemServices_RemoveWeapons Function Location Workflow

Overview

This workflow locates the CCSPlayer_ItemServices_RemoveWeapons function in CS2 server binary files. This is a virtual function in the CCSPlayer_ItemServices vtable, called during the death animation state to strip all weapons from a player pawn.

The identification strategy is:

1. Find CCSPlayerStateDeathAnim vtable → decompile vtable[0] (OnEnter)
2. In OnEnter, the first virtual call targets m_pItemServices->RemoveWeapons
3. Cross-reference with CCSPlayer_ItemServices vtable to confirm the vtable index

Location Steps

1. Get CCSPlayerStateDeathAnim VTable

• ALWAYS Use SKILL /get-vtable-from-yaml with class_name=CCSPlayerStateDeathAnim.

  If the skill returns an error, STOP and report to user.

  Otherwise, extract vtable_entries[0] — this is CCSPlayerStateDeathAnim::OnEnter.

2. Decompile OnEnter and Identify the RemoveWeapons Call

Decompile vtable_entries[0]:

mcp__ida-pro-mcp__decompile(addr="<vtable_entries_0>")

In the decompiled output, look for the first virtual call pattern near the top of the function:

(*(void (__fastcall **)(_QWORD, __int64))(**(_QWORD **)(*(_QWORD *)(a1 + 32) + <m_pItemServices_offset>) + <vfunc_byte_offset>))(...)

Key pattern:

• a1 + 32 → the player pawn pointer
• + <m_pItemServices_offset> → offset to m_pItemServices member (e.g., 2936 on Windows)
• + <vfunc_byte_offset> → byte offset into CCSPlayer_ItemServices vtable

Calculate the vtable index: vfunc_index = vfunc_byte_offset / 8 (64-bit pointers).

3. Get CCSPlayer_ItemServices VTable

• ALWAYS Use SKILL /get-vtable-from-yaml with class_name=CCSPlayer_ItemServices.

  If the skill returns an error, STOP and report to user.

  Otherwise, use the vfunc_index from Step 2 to look up the function address in vtable_entries.

4. Rename Function

Use rename to give the function a meaningful name:

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

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-vfunc-as-yaml to write the analysis results.

Required parameters:

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

VTable parameters:

• vtable_name: CCSPlayer_ItemServices
• vfunc_offset: vfunc_index * 8 (from step 2)
• vfunc_index: The index from step 2

Function Characteristics

The CCSPlayer_ItemServices_RemoveWeapons function:

• Is called from CCSPlayerStateDeathAnim::OnEnter as the first virtual call
• Takes a boolean parameter (set to 1/true when called from death state)
• Strips all weapons from the player pawn's inventory

VTable Information

• VTable Name: CCSPlayer_ItemServices
• VTable Mangled Name:
  • Windows: ??_7CCSPlayer_ItemServices@@6B@
  • Linux: _ZTV22CCSPlayer_ItemServices
• VTable Offset: 0xB8 (may change with game updates)
• VTable Index: 23 (may change with game updates)

Output YAML Format

The output YAML filename depends on the platform:

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

Related Functions

• CCSPlayerStateDeathAnim::OnEnter (vtable[0]) - Death state entry, calls RemoveWeapons
• CCSPlayer_ItemServices::DropActivePlayerWeapon - Drops the active weapon