Developer knowledge network · moderated exchange

UnreliableCode 커뮤니티

개발자 연구, 리버스 엔지니어링 및 코딩 커뮤니티

Knowledge index살다
4Categories
919Threads
2.8K게시물
Analysis

Resolving dynamic GWorld pointer via non-volatile register search in .text section [v2.4 Technical Discussion]

ue5_explorer
UE Specialist
MEMBER
대표: 107
가입 날짜: Mar 2020
게시물: 6
감사해요: 69
1개월 전 · Jul 2, 2026 8:26 PM
#1

Rather than hardcoding static offsets for GWorld in Unreal Engine games, you can scan for functions initializing the world context:

  1. Scan for the opcode pattern: 48 8B 05 ? ? ? ? 48 85 C0 74 ? 48 8B 88 (mov rax, [rip + offset]).
  2. Compute 32-bit RIP-relative displacement: pGWorld = instructionAddress + 7 + *(int32_t*)(instructionAddress + 3).
  3. Verify pointer dereference points to valid UWorld containing PersistentLevel (0x30) and OwningGameInstance (0x180).

Automates offset updates across weekly patch deployments!

val_driver_guy
Driver Dev
MEMBER
대표: 42
가입 날짜: May 2019
게시물: 24
감사해요: 37
1개월 전 · Jul 3, 2026 3:12 AM
#2

Displacement math works reliably across all UE4 and UE5 builds. Clean explanation.

vtable_slayer
Senior Reverser
MEMBER
대표: 215
가입 날짜: Mar 2018
게시물: 86
감사해요: 61
1개월 전 · Jul 3, 2026 12:34 PM
#3

Pattern scanning GWorld on load avoids having to update signature offsets manually.