Entrypoint trace¶

Top-down call trace from the PE entrypoint through the VC6 CRT startup into crimsonland_main. The game's own startup continues in Boot / Loading Sequence.

Entry address¶

PE entrypoint VA: 0x00463026
Function: start, the VC6 SP6 WinMainCRTStartup from LIBCMT's wincrt0.obj, matched byte-exact against the archive member; it calls crimsonland_main as WinMain.

Trace (depth 2, internal calls only)¶

- start -> crt_mt_init, crt_io_init, crt_build_argv, crt_fast_error_exit, crt_exit, crt_build_environ, crt_skip_program_name, crt_heap_init ...
  - crt_mt_init -> crt_init_locks, crt_init_thread_data (0x004654a5), crt_calloc (0x004667ac)
  - crt_io_init -> __amsg_exit, _malloc
  - crt_build_argv -> __amsg_exit, _malloc, crt_mbcs_init (0x0046d5c7), crt_parse_cmdline
  - crt_fast_error_exit -> crt_runtime_error_banner, crt_report_runtime_error
  - crt_exit -> crt_doexit
  - crt_build_environ -> _strlen, __amsg_exit, crt_strcpy (0x00465c30), crt_free_base, _malloc, crt_mbcs_init (0x0046d5c7)
  - crt_skip_program_name -> crt_ismbblead, crt_mbcs_init (0x0046d5c7)
  - crt_heap_init -> crt_sbh_init, crt_sbh_create_region, crt_heap_select
  - crt_get_environment_strings -> crt_free_base, _malloc, crt_bufcpy (0x004658f0)
  - crt_exception_filter -> crt_xcptlookup, crt_get_thread_data
  - crimsonland_main -> crt_srand (0x00461739), texture_get_or_load, crt_getcwd (0x0046248e), audio_shutdown_all, reg_write_dword, crt_free, game_load_status, console_flush_log ...
  - crt_run_initializers -> crt_fpmath, crt_call_fn_range
    - crt_init_locks
    - crt_init_thread_data (0x004654a5)
    - crt_calloc (0x004667ac) -> crt_old_sbh_alloc_block, crt_calloc_sbh_unlock_cleanup, crt_calloc_old_sbh_unlock_cleanup, crt_call_new_handler (0x00467e47), crt_lock, crt_sbh_alloc_block, _memset
    - __amsg_exit -> crt_runtime_error_banner, __exit, crt_report_runtime_error
    - _malloc -> __nh_malloc
    - crt_mbcs_init (0x0046d5c7) -> crt_setmbcp (0x0046d1ef)
    - crt_parse_cmdline
    - crt_runtime_error_banner -> crt_report_runtime_error
    - crt_report_runtime_error -> crt_strcat (0x00465c40), crt_message_box_a, _strlen, _strncpy, crt_strcpy (0x00465c30)
    - crt_doexit -> crt_exit_unlock, crt_exit_lock, crt_call_fn_range
    - _strlen
    - crt_strcpy (0x00465c30)
    - crt_free_base -> crt_free_sbh_unlock_cleanup, crt_sbh_find_block (0x004679d6), crt_sbh_find_region (0x00466c7b), crt_lock, crt_old_sbh_free_block, crt_free_old_sbh_unlock_cleanup, crt_sbh_free_block
    - crt_ismbblead -> crt_ismbbtype
    - crt_sbh_init
    - crt_sbh_create_region -> _memset
    - crt_heap_select -> crt_chkstk (0x0046cda0), _strchr, _strncmp, crt_strtol_l (0x0046cdcf), crt_get_linker_version, _strstr
    - crt_bufcpy (0x004658f0)
    - crt_xcptlookup
    - crt_get_thread_data -> __amsg_exit, crt_init_thread_data (0x004654a5), crt_calloc (0x004667ac)
    - crt_srand (0x00461739) -> crt_get_thread_data
    - texture_get_or_load -> console_printf
    - crt_getcwd (0x0046248e) -> crt_unlock, crt_lock, crt_getdcwd (0x004624b5)
    - audio_shutdown_all -> sfx_release_all, dsound_shutdown (0x0043bc20), music_release_all
    - reg_write_dword
    - crt_free -> crt_free_base
    - game_load_status -> game_build_path (0x00402bd0), play_time_load, crt_fopen (0x0046103f), crt_fseek (0x00461d91), crt_ftell (0x00461c0e), crt_fclose, game_save_status, console_printf ...
    - console_flush_log -> crt_fflush (0x00461448), game_build_path (0x00402bd0), crt_fopen (0x0046103f), crt_fclose, crt_fwrite (0x004615ae)
    - dx_get_version -> dx_get_version_fallback_from_files, crt_tolower (0x00461e9b), dx_get_version_from_dxdiag, crt_snprintf (0x00461e4a)
    - HlinkNavigateString
    - Direct3DCreate8
    - crt_time -> crt_mktime (0x00465da5)
    - console_register_command -> operator_new, strdup_malloc
    - grim_load_interface
    - console_register_cvar (0x00402350) -> crt_free, operator_new, strdup_malloc, console_cvar_find (0x00402480), crt_atof_l (0x004610da)
    - crt_fpmath -> crt_ms_p5_mp_test_fdiv, crt_cfltcvt_init, crt_set_default_precision
    - crt_call_fn_range

Classic Windows entry sequence (ordered)¶

From start (0x00463026), the classic binary performs a short CRT/bootstrap sequence and then enters the main game loop.

High-level call order:

1) GetVersion → populate version globals 2) crt_heap_init(1) → CRT heap init (small-block selection) 3) crt_mt_init() → CRT thread/TLS init 4) crt_io_init() → CRT file handle table init 5) GetCommandLineA() → stored in crt_ansi_command_line 6) crt_get_environment_strings() → environment block copy 7) crt_build_argv() → parse command line into argv/argc 8) crt_build_environ() → build environ from environment block 9) crt_run_initializers() → invoke CRT initializer ranges 10) GetStartupInfoA() → captures startup flags 11) crt_skip_program_name() → command-line tail after argv[0] 12) GetModuleHandleA(NULL) 13) crimsonland_main() (0x0042c450) → full game init/run/shutdown 14) crt_exit(exit_code) → exit handling 15) crt_exception_filter(exception_code, exception_ptr) → CRT exception filter

crimsonland_main (decomp/1.9/crimsonland/crimsonland/crimsonland_main.cpp) covers DirectX checks, Grim2D loading, config, input/audio/renderer setup, the game loop and shutdown; Boot / Loading Sequence walks it in order.

The crt_* functions are byte-exact archive matches against the VC6 SP6 LIBCMT.LIB (see analysis/library_provenance.json).