Usage ---- There are many environment variables to control Box64 behaviour. #### BOX64_LOG Controls the Verbosity level of the logs * 0: NONE : No message (except some fatal error). (Default.) * 1: INFO : Show some minimum log (Example: librairies not found) * 2: DEBUG : Details a lot of stuff (Example: relocations or functions called). * 3: DUMP : All DEBUG plus DUMP of all ELF Info. #### BOX64_NOBANNER Disables Box64 printing its version and build * 0 : Enable printing its banner. (Default.) * 1 : Disable printing its banner. #### BOX64_LD_LIBRARY_PATH Path to look for x86_64 libraries. Default is current folder and `lib` in current folder. Also, `/usr/lib/x86_64-linux-gnu` and `/lib/x86_64-linux-gnu` are added if they exist. #### BOX64_PATH Path to look for x86_64 executable. Default is current folder and `bin` in current folder. #### BOX64_DLSYM_ERROR Enables/Disables the logging of `dlsym` errors. * 0 : Don't log `dlsym` errors. (Default.) * 1 : Log dlsym errors. #### BOX64_TRACE_FILE Send all log and trace to a file instead of `stdout` Also, if name contains `%pid` then this is replaced by the actual PID of box64 instance Use `stderr` to use this instead of default `stdout` #### BOX64_TRACE Only on build with trace enabled. Trace allow the logging of all instruction executed, along with register dump * 0 : No trace. (Default.) * 1 : Trace enabled. Trace start after the initialisation of all depending libraries is done. * symbolname : Trace only `symbolname` (trace is disable if the symbol is not found). * 0xXXXXXXX-0xYYYYYYY : Trace only between the 2 addresses. #### BOX64_TRACE_INIT Use BOX64_TRACE_INIT instead of BOX_TRACE to start trace before the initialisation of libraries and the running program * 0 : No trace. (Default.) * 1 : Trace enabled. The trace start with the initialisation of all depending libraries is done. #### BOX64_TRACE_START Only on builds with trace enabled. * NNNNNNN : Start trace only after NNNNNNNN opcode execute (number is an `uint64_t`). #### BOX64_TRACE_XMM Only on builds with trace enabled. * 0 : The XMM (i.e. SSE/SSE2) register will not be logged with the general and x86 registers. (Default.) * 1 : Dump the XMM registers. #### BOX64_TRACE_EMM Only on builds with trace enabled. * 0 : The EMM (i.e. XMM/x87) register will not be logged with the general and x86 registers. (Default.) * 1 : Dump the EMM registers. #### BOX64_TRACE_COLOR Only on builds with trace enabled. * 0 : The general registers will always be the default white color. (Default.) * 1 : The general registers will change color in the dumps when they changed value. #### BOX64_LOAD_ADDR Try to load at 0xXXXXXX main binary (if binary is a PIE) * 0xXXXXXXXX : The load address . (Only active on PIE programs.) #### BOX64_NOSIGSEGV Disable handling of SigSEGV. (Very useful for debugging.) * 0 : Let the x86 program set sighandler for SEGV (Default.) * 1 : Disable the handling of SigSEGV. #### BOX64_NOSIGILL Disable handling of SigILL (to ease debugging mainly). * 0 : Let x86 program set sighandler for Illegal Instruction * 1 : Disables the handling of SigILL #### BOX64_X11THREADS Call XInitThreads when loading X11. (This is mostly for old Loki games with the Loki_Compat library.) * 0 : Don't force call XInitThreads. (Default.) * 1 : Call XInitThreads as soon as libX11 is loaded. #### BOX64_X11GLX Force libX11's GLX extension to be present. * 0 : Do not force libX11's GLX extension to be present. * 1 : GLX will always be present when using XQueryExtension. (Default.) #### BOX64_DYNAREC_DUMP Enables/disables Box64's Dynarec's dump. * 0 : Disable Dynarec's blocks dump. (Default.) * 1 : Enable Dynarec's blocks dump. * 2 : Enable Dynarec's blocks dump with some colors. #### BOX64_DYNAREC_LOG Set the level of DynaRec's logs. * 0 : NONE : No Logs for DynaRec. (Default.) * 1 :INFO : Minimum Dynarec Logs (only unimplemented OpCode). * 2 : DEBUG : Debug Logs for Dynarec (with details on block created / executed). * 3 : VERBOSE : All of the above plus more. #### BOX64_DYNAREC Enables/Disables Box64's Dynarec. * 0 : Disables Dynarec. * 1 : Enable Dynarec. (Default.) #### BOX64_DYNAREC_TRACE Enables/Disables trace for generated code. * 0 : Disable trace for generated code. (Default.) * 1 : Enable trace for generated code (like regular Trace, this will slow down the program a lot and generate huge logs). #### BOX64_NODYNAREC Forbid dynablock creation in the interval specified (helpfull for debugging behaviour difference between Dynarec and Interpretor) * 0xXXXXXXXX-0xYYYYYYYY : define the interval where dynablock cannot start (inclusive-exclusive) #### BOX64_LIBGL * libXXXX set the name for libGL (defaults to libGL.so.1). * /PATH/TO/libGLXXX : Sets the name and path for libGL You can also use SDL_VIDEO_GL_DRIVER #### BOX64_LD_PRELOAD * XXXX[:YYYYY] force loading XXXX (and YYYY...) libraries with the binary PreLoaded libs can be emulated or native, and are treated the same way as if they were comming from the binary #### BOX64_EMULATED_LIBS * XXXX[:YYYYY] force lib XXXX (and YYYY...) to be emulated (and not wrapped) Some games uses an old version of some libraries, with an ABI incompatible with native version. Note that LittleInferno for example is auto detected, and libvorbis.so.0 is automatical added to emulated libs, and same for Don't Starve (and Together / Server variant) that use an old SDL2 too #### BOX64_ALLOWMISSINGLIBS Allow Box64 to continue even if a library is missing. * 0 : Box64 will stop if a library cannot be loaded. (Default.) * 1 : Continue even if a needed library cannot be loaded. Unadvised, this will, in most cases, crash later on. #### BOX64_NOPULSE Disables the load of pulseaudio libraries. * 0 : Load pulseaudio libraries if found. (Default.) * 1 : Disables the load of pulse audio libraries (libpulse and libpulse-simple), both the native library and the x86 library #### BOX64_JITGDB * 0 : Just print the Segfault message on segfault (default) * 1 : Launch `gdb` when a segfault, bus error or illegal instruction signal is trapped, attached to the offending process and go in an endless loop, waiting. When in gdb, you need to find the correct thread yourself (the one with `my_box64signalhandler` in is stack) then probably need to `finish` 1 or 2 functions (inside `usleep(..)`) and then you'll be in `my_box64signalhandler`, just before the printf of the Segfault message. Then simply `set waiting=0` to exit the infinite loop. * 2 : Launch `gdbserver` when a segfault, bus error or illegal instruction signal is trapped, attached to the offending process, and go in an endless loop, waiting. Use `gdb /PATH/TO/box64` and then `target remote 127.0.0.1:1234` to connect to the gdbserver (or use actual IP if not on the machine). After that, the procedure is the same as with ` BOX64_JITGDB=1`. This mode can be usefullwhen programs redirect all console output to a file (like Unity3D Games)