freebsd-src/sys/boot/forth/loader.4th
Daniel C. Sobral 3851401454 Now I see the error of my ways.
Previous revision of this file changed the "boot" commands to take
no arguments from the stack. This is only valid in the case where
a kernel has not been loaded. In that case, load_kernel_and_modules
will be called, which takes a list of arguments from the stack.

When a kernel is presently loaded, though, the list of arguments must
be passed to the boot command, which was the behaviour before the last
revision.

Fix things for both cases.

Noticed by: S-Max and others on that chat room
2000-10-09 11:29:40 +00:00

307 lines
7.4 KiB
Forth

\ Copyright (c) 1999 Daniel C. Sobral <dcs@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.
\
\ $FreeBSD$
s" arch-alpha" 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]
s" arch-i386" environment? [if] [if]
s" loader_version" environment? [if]
10 < [if]
.( Loader version 1.0+ required) cr
abort
[then]
[else]
.( Could not get loader version!) cr
abort
[then]
[then] [then]
include /boot/support.4th
\ ***** boot-conf
\
\ Prepares to boot as specified by loaded configuration files.
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 )
1 boot exit
then
load_kernel_and_modules
?dup if exit then
0 1 boot exit
then
else
s" kernelname" getenv? if ( a kernel has been loaded )
1 boot exit
then
load_kernel_and_modules
?dup if exit then
0 1 boot exit
then
load_kernel_and_modules
?dup 0= if 0 1 boot then
;
: 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 also builtins
builtin: boot
builtin: boot-conf
only forth definitions also support-functions
\ ***** check-password
\
\ If a password was defined, execute autoboot and ask for
\ password if autoboot returns.
: check-password
password .addr @ if
0 autoboot
false >r
begin
bell emit bell emit
." Password: "
password .len @ read-password
dup password .len @ = if
2dup password .addr @ password .len @
compare 0= if r> drop true >r then
then
drop free drop
r@
until
r> drop
then
;
\ ***** start
\
\ Initializes support.4th global variables, sets loader_conf_files,
\ process conf files, and, if any one such file was succesfully
\ read to the end, load kernel and modules.
: start ( -- ) ( throws: abort & user-defined )
s" /boot/defaults/loader.conf" initialize
include_conf_files
\ Will *NOT* try to load kernel and modules if no configuration file
\ was succesfully loaded!
any_conf_read? if
load_kernel
load_modules
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
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 .addr @ ?dup if free abort" Fatal error freeing memory" then
strdup conf_files .len ! conf_files .addr !
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
\ ***** enable-module
\
\ Turn a module loading on.
: enable-module ( <module> -- )
bl parse module_options @ >r
begin
r@
while
2dup
r@ module.name dup .addr @ swap .len @
compare 0= if
2drop
r@ module.name dup .addr @ swap .len @ type
true r> module.flag !
." will be loaded." cr
exit
then
r> module.next @ >r
repeat
r> drop
type ." wasn't found." cr
;
\ ***** disable-module
\
\ Turn a module loading off.
: disable-module ( <module> -- )
bl parse module_options @ >r
begin
r@
while
2dup
r@ module.name dup .addr @ swap .len @
compare 0= if
2drop
r@ module.name dup .addr @ swap .len @ type
false r> module.flag !
." will not be loaded." cr
exit
then
r> module.next @ >r
repeat
r> drop
type ." wasn't found." cr
;
\ ***** toggle-module
\
\ Turn a module loading on/off.
: toggle-module ( <module> -- )
bl parse module_options @ >r
begin
r@
while
2dup
r@ module.name dup .addr @ swap .len @
compare 0= if
2drop
r@ module.name dup .addr @ swap .len @ type
r@ module.flag @ 0= dup r> module.flag !
if
." will be loaded." cr
else
." will not be loaded." cr
then
exit
then
r> module.next @ >r
repeat
r> drop
type ." wasn't found." cr
;
\ ***** show-module
\
\ Show loading information about a module.
: show-module ( <module> -- )
bl parse module_options @ >r
begin
r@
while
2dup
r@ module.name dup .addr @ swap .len @
compare 0= if
2drop
." Name: " r@ module.name dup .addr @ swap .len @ type cr
." Path: " r@ module.loadname dup .addr @ swap .len @ type cr
." Type: " r@ module.type dup .addr @ swap .len @ type cr
." Flags: " r@ module.args dup .addr @ swap .len @ type cr
." Before load: " r@ module.beforeload dup .addr @ swap .len @ type cr
." After load: " r@ module.afterload dup .addr @ swap .len @ type cr
." Error: " r@ module.loaderror dup .addr @ swap .len @ type cr
." Status: " r> module.flag @ if ." Load" else ." Don't load" then cr
exit
then
r> module.next @ >r
repeat
r> drop
type ." wasn't found." cr
;
\ 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
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" .?
;
only forth also