Find CCSGameRules_TerminateRound
Locate CCSGameRules::TerminateRound in CS2 server.dll / libserver.so using IDA Pro MCP tools.
Method
1. Find the TerminateRound Strings
mcp__ida-pro-mcp__find_regex pattern="TerminateRound"
There are exactly two hits:
- A bare
"TerminateRound" string (a debug/log tag, e.g. used in a Msg/net_showmsg-style trace of the
function name).
"TerminateRound: unknown round end ID %i\n" — a warning format string printed when an invalid round-end
reason id is passed in.
2. Get the Referencing Function for Both Strings
mcp__ida-pro-mcp__xrefs_to addr="<bare_TerminateRound_string_addr>"
mcp__ida-pro-mcp__xrefs_to addr="<unknown_round_end_ID_string_addr>"
Both strings are referenced from the exact same function — this agreement is the primary confirmation signal
(two independent strings converging on one function is very unlikely to be a coincidence).
Linux 14168 reference: bare "TerminateRound" is at 0x8edd6c, referenced from 0x138538b;
"TerminateRound: unknown round end ID %i\n" is at 0x989d78, referenced from 0x1386f93. Both xrefs land
inside the same function starting at 0x1385380 (size 0x2063).
3. Sanity-Check the Candidate
mcp__ida-pro-mcp__decompile addr="0x1385380"
Confirm the decompilation is consistent with TerminateRound(int iReason, float flDelay = ...): takes this +
an integer round-end-reason parameter (used in a large switch/if-chain that sets round-end state, awards money,
updates score, fires round-end events, etc.), plus additional float/optional parameters. The function is large
(hundreds of instructions) since it drives most of the end-of-round bookkeeping.
4. Generate Function Signature
ALWAYS Use SKILL /generate-signature-for-function with addr=0x1385380 to generate a robust and unique
func_sig.
Linux 14168 reference: generated signature is 55 48 89 E5 41 57 41 89 F7 41 56 48 8D 35 — already unique
across the binary at this length (no wildcards needed in the head).
5. Write IDA Analysis Output as YAML
ALWAYS Use SKILL /write-func-as-yaml to write the analysis results.
Required parameters:
func_name: CCSGameRules_TerminateRoundfunc_addr: 0x1385380func_sig: The validated signature from step 4
Function Characteristics
- Purpose: Ends the current round for a given reason id (e.g. bomb defused, T/CT wiped, time expired),
driving score updates, money awards, round-end event broadcast, and round-restart scheduling.
- Binary:
server.dll / libserver.so
- Parameters:
(this, unsigned int reason, ...) — additional trailing parameters (observed as __int64,
float) control timing/延迟 of the subsequent round restart.
- Return value: not consumed by callers of interest (bookkeeping side-effects only).
Discovery Strategy
TerminateRound has two distinct, independently-placed string literals in the binary: a bare debug tag and a
full warning-format string for the invalid-reason-id error path.- Both strings are referenced from exactly one function each, and — critically — from the same function.
This double-string agreement is a strong, code-shape-independent fingerprint that survives compiler
refactoring/inlining changes far better than a fixed byte pattern alone would.
- The candidate's parameter shape (integer round-end reason + optional delay) and its size (large, since it
drives most round-end bookkeeping) are consistent with
TerminateRound's known role.
This is robust because two unrelated strings (a log tag and an error message) both trace back to the same
function, which is very unlikely to happen by chance for any other function in the binary.
Output YAML Format
The output YAML filename depends on the platform:
server.dll -> CCSGameRules_TerminateRound.windows.yamllibserver.so -> CCSGameRules_TerminateRound.linux.yaml
Fields: func_name, func_va, func_rva, func_size, func_sig.