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Diffstat (limited to 'stand/forth/loader.4th')
| -rw-r--r-- | stand/forth/loader.4th | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/stand/forth/loader.4th b/stand/forth/loader.4th new file mode 100644 index 000000000000..9486237b8a93 --- /dev/null +++ b/stand/forth/loader.4th @@ -0,0 +1,266 @@ +\ Copyright (c) 1999 Daniel C. Sobral <dcs@FreeBSD.org> +\ Copyright (c) 2011-2015 Devin Teske <dteske@FreeBSD.org> +\ 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. +\ +\ $FreeBSD$ + +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 +s" efi-version" getenv? [if] + include /boot/efi.4th +[then] + +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 + \ If the user defined a post-initialize hook, call it now + s" post-initialize" sfind if execute else drop then + \ 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 + \ If the user defined a post-initialize hook, call it now + s" post-initialize" sfind if execute else drop then + 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 ( <filename> | 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 ( <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 |