name: find-CCSGameRules_TerminateRound
description: Find and identify the CCSGameRules_TerminateRound function in CS2 binary using IDA Pro MCP. Use this skill when reverse engineering CS2 server.dll or server.so to locate the TerminateRound function by searching for known debug string references and analyzing cross-references.

Find CCSGameRules_TerminateRound

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

Method

1. Search for the debug string:
   mcp__ida-pro-mcp__find_regex pattern="TerminateRound"

Expected matches:
- TerminateRound - Plain string reference
- TerminateRound: unknown round end ID %i\n - Error message

1. Get cross-references to the plain string TerminateRound:
   mcp__ida-pro-mcp__xrefs_to addrs="<string_addr>"

2. Decompile the referencing function to verify:
   mcp__ida-pro-mcp__decompile addr="<function_addr>"

3. Rename the function:
   mcp__ida-pro-mcp__rename batch={"func": [{"addr": "<function_addr>", "name": "CCSGameRules_TerminateRound"}]}

4. Generate and validate unique signature:

DO NOT use find_bytes as it won't work for function.
ALWAYS Use SKILL /generate-signature-for-function to generate a robust and unique signature for the function.

1. 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: CCSGameRules_TerminateRound
- func_addr: The function address from step 3
- func_sig: The validated signature from step 5

Signature Pattern

The function has a distinctive prologue pattern:
- Uses xmm6 register for floating-point parameter handling
- Has a unique combination of movaps instructions in prologue
- References the string "TerminateRound" for debug logging

Function Characteristics

• Purpose: Terminates the current round with a specified reason and delay
• Parameters:
• this - CCSGameRules pointer
• delay (xmm1) - Float delay before round ends
• reason (r8d) - Round end reason ID
• Additional parameters for legacy support

Round End Reason IDs

Common values (may vary by game version):
- 0: Target bombed
- 1: VIP escaped
- 2: VIP killed
- 3: Terrorists escaped
- 4: CTs prevented escape
- 5: Escaping terrorists neutralized
- 6: Bomb defused
- 7: CTs win
- 8: Terrorists win
- 9: Round draw
- 10: All hostages rescued
- 11: Target saved
- 12: Hostages not rescued
- 13: Terrorists not escaped
- 14: VIP not escaped
- 15: Game commencing
- 16: Terrorists surrender
- 17: CTs surrender
- 18: Terrorists planted bomb
- 19: CTs reached hostage

Output YAML Format

The output YAML filename depends on the platform:
- server.dll → CCSGameRules_TerminateRound.windows.yaml
- server.so / libserver.so → CCSGameRules_TerminateRound.linux.yaml

func_va: 0x1808AF770   # Virtual address - changes with game updates
func_rva: 0x8AF770     # Relative virtual address (VA - image base) - changes with game updates
func_size: 0x165C      # Function size in bytes - changes with game updates
func_sig: XX XX XX XX  # Unique byte signature for pattern scanning

Note: This is NOT a virtual function, so no vtable information is included.