rrt/docs/control-loop-atlas/crt-and-process-startup.md at 1040a131dab1e90d89c9b6ab78b8b991c28a65cb

jan/rrt

Jan Petykiewicz 1040a131da Split control-loop atlas into section files

2026-04-11 17:55:16 -07:00

CRT and Process Startup

Roots: entry at 0x005a313b, CRT helpers in the 0x005a2d..0x005ad4.. range, and app_bootstrap_main at 0x00484440.
Trigger/Cadence: single process startup path before shell or engine services exist.
Key Dispatchers: startup_init_tls_state, startup_init_file_handle_table, startup_run_init_callback_table, __setenvp, startup_build_argv, ___crtGetEnvironmentStringsA, then app_bootstrap_main.
State Anchors: CRT heap and file-handle tables; process environment and argv storage.
Subsystem Handoffs: exits the generic CRT path at app_bootstrap_main, which becomes the first RT3-owned coordinator.
Evidence: artifacts/exports/rt3-1.06/startup-call-chain.md, artifacts/exports/rt3-1.06/function-map.csv.
Open Questions: exact ownership boundary between compiler CRT shims and the first game-owned bootstrap helper; whether any nontrivial startup callbacks seed game globals before app_bootstrap_main.