\ Copyright (c) 1999 Daniel C. Sobral \ Copyright (c) 2011-2015 Devin Teske \ All rights reserved. \ \ Redistribution and use in source and binary forms, with or without \ modification, are permitted provided that the following conditions \ are met: \ 1. Redistributions of source code must retain the above copyright \ notice, this list of conditions and the following disclaimer. \ 2. Redistributions in binary form must reproduce the above copyright \ notice, this list of conditions and the following disclaimer in the \ documentation and/or other materials provided with the distribution. \ \ THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND \ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE \ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE \ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE \ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL \ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS \ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) \ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT \ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY \ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF \ SUCH DAMAGE. \ \ $FreeBSD: head/sys/boot/forth/loader.4th 300115 2016-05-18 05:58:57Z imp $ only forth definitions s" arch-i386" environment? [if] [if] s" loader_version" environment? [if] 11 < [if] .( Loader version 1.1+ required) cr abort [then] [else] .( Could not get loader version!) cr abort [then] [then] [then] 256 dictthreshold ! \ 256 cells minimum free space 2048 dictincrease ! \ 2048 additional cells each time include /boot/support.4th include /boot/color.4th include /boot/delay.4th include /boot/check-password.4th only forth definitions : bootmsg ( -- ) loader_color? dup ( -- bool bool ) if 7 fg 4 bg then ." Booting..." if me then cr ; : try-menu-unset \ menu-unset may not be present s" beastie_disable" getenv dup -1 <> if s" YES" compare-insensitive 0= if exit then else drop then s" menu-unset" sfind if execute else drop then s" menusets-unset" sfind if execute else drop then ; only forth also support-functions also builtins definitions : boot 0= if ( interpreted ) get_arguments then \ Unload only if a path was passed dup if >r over r> swap c@ [char] - <> if 0 1 unload drop else s" kernelname" getenv? if ( a kernel has been loaded ) try-menu-unset bootmsg 1 boot exit then load_kernel_and_modules ?dup if exit then try-menu-unset bootmsg 0 1 boot exit then else s" kernelname" getenv? if ( a kernel has been loaded ) try-menu-unset bootmsg 1 boot exit then load_kernel_and_modules ?dup if exit then try-menu-unset bootmsg 0 1 boot exit then load_kernel_and_modules ?dup 0= if bootmsg 0 1 boot then ; \ ***** boot-conf \ \ Prepares to boot as specified by loaded configuration files. : boot-conf 0= if ( interpreted ) get_arguments then 0 1 unload drop load_kernel_and_modules ?dup 0= if 0 1 autoboot then ; also forth definitions previous builtin: boot builtin: boot-conf only forth definitions also support-functions \ ***** start \ \ Initializes support.4th global variables, sets loader_conf_files, \ processes conf files, and, if any one such file was successfully \ read to the end, loads kernel and modules. : start ( -- ) ( throws: abort & user-defined ) s" /boot/defaults/loader.conf" initialize include_conf_files include_nextboot_file \ Will *NOT* try to load kernel and modules if no configuration file \ was successfully loaded! any_conf_read? if s" loader_delay" getenv -1 = if load_xen_throw load_kernel load_modules else drop ." Loading Kernel and Modules (Ctrl-C to Abort)" cr s" also support-functions" evaluate s" set delay_command='load_xen_throw load_kernel load_modules'" evaluate s" set delay_showdots" evaluate delay_execute then then ; \ ***** initialize \ \ Overrides support.4th initialization word with one that does \ everything start one does, short of loading the kernel and \ modules. Returns a flag : initialize ( -- flag ) s" /boot/defaults/loader.conf" initialize include_conf_files include_nextboot_file any_conf_read? ; \ ***** read-conf \ \ Read a configuration file, whose name was specified on the command \ line, if interpreted, or given on the stack, if compiled in. : (read-conf) ( addr len -- ) conf_files string= include_conf_files \ Will recurse on new loader_conf_files definitions ; : read-conf ( | addr len -- ) ( throws: abort & user-defined ) state @ if \ Compiling postpone (read-conf) else \ Interpreting bl parse (read-conf) then ; immediate \ show, enable, disable, toggle module loading. They all take module from \ the next word : set-module-flag ( module_addr val -- ) \ set and print flag over module.flag ! dup module.name strtype module.flag @ if ." will be loaded" else ." will not be loaded" then cr ; : enable-module find-module ?dup if true set-module-flag then ; : disable-module find-module ?dup if false set-module-flag then ; : toggle-module find-module ?dup if dup module.flag @ 0= set-module-flag then ; \ ***** show-module \ \ Show loading information about a module. : show-module ( -- ) find-module ?dup if show-one-module then ; \ Words to be used inside configuration files : retry false ; \ For use in load error commands : ignore true ; \ For use in load error commands \ Return to strict forth vocabulary : #type over - >r type r> spaces ; : .? 2 spaces 2swap 15 #type 2 spaces type cr ; \ Execute the ? command to print all the commands defined in \ C, then list the ones we support here. Please note that this \ doesn't use pager_* routines that the C implementation of ? \ does, so these will always appear, even if you stop early \ there. And they may cause the commands to scroll off the \ screen if the number of commands modulus LINES is close \ to LINEs.... : ? ['] ? execute s" boot-conf" s" load kernel and modules, then autoboot" .? s" read-conf" s" read a configuration file" .? s" enable-module" s" enable loading of a module" .? s" disable-module" s" disable loading of a module" .? s" toggle-module" s" toggle loading of a module" .? s" show-module" s" show module load data" .? s" try-include" s" try to load/interpret files" .? ; : try-include ( -- ) \ see loader.4th(8) ['] include ( -- xt ) \ get the execution token of `include' catch ( xt -- exception# | 0 ) if \ failed LF parse ( c -- s-addr/u ) 2drop \ advance >in to EOL (drop data) \ ... prevents words unused by `include' from being interpreted then ; immediate \ interpret immediately for access to `source' (aka tib) only forth definitions