Commit Graph

174 Commits

Author SHA1 Message Date
Archie Cobbs
05f8ee7fa9 Add a new sysctl "debug.enter_debugger" (when the kernel is compiled
with 'options DDB').  Setting this to `ddb' or `gdb' breaks into the
kernel debugger in the corresponding mode.  This mechanism has proven
very useful at Whistle for setting breakpoints, etc., while doing
remote serial line kernel debugging.

Obtained from:	Whistle source tree
2000-01-27 22:27:34 +00:00
Kazutaka YOKOTA
35e61cbd71 Add a new mechanism, cndbctl(), to tell the console driver that
ddb is entered.  Don't refer to `in_Debugger' to see if we
are in the debugger.  (The variable used to be static in Debugger()
and wasn't updated if ddb is entered via traps and panic anyway.)

- Don't refer to `in_Debugger'.
- Add `db_active' to i386/i386/db_interface.d (as in
  alpha/alpha/db_interface.c).
- Remove cnpollc() stub from ddb/db_input.c.
- Add the dbctl function to syscons, pcvt, and sio. (The function for
  pcvt and sio is noop at the moment.)

Jointly developed by: bde and me

(The final version was tweaked by me and not reviewed by bde.  Thus,
if there is any error in this commit, that is entirely of mine, not
his.)

Some changes were obtained from: NetBSD
2000-01-11 14:54:01 +00:00
Peter Wemm
5dfaebe1c3 Unused file. This (NetBSD derived) file was obsoleted by kld. 2000-01-11 13:29:10 +00:00
Peter Wemm
63aad530bc Fix a typo in the db_kld.c file - it's kld support not raw a.out support.
Always use db_kld.c for symbol table support as the base kernel maintains
this information.
2000-01-11 13:25:12 +00:00
Archie Cobbs
9ac362ddff Remove unused macro definition. 1999-11-02 22:40:15 +00:00
Poul-Henning Kamp
923502ff91 useracc() the prequel:
Merge the contents (less some trivial bordering the silly comments)
of <vm/vm_prot.h> and <vm/vm_inherit.h> into <vm/vm.h>.  This puts
the #defines for the vm_inherit_t and vm_prot_t types next to their
typedefs.

This paves the road for the commit to follow shortly: change
useracc() to use VM_PROT_{READ|WRITE} rather than B_{READ|WRITE}
as argument.
1999-10-29 18:09:36 +00:00
Peter Wemm
07bee188eb Delete unneeded #include
Submitted by:	 phk
1999-10-11 14:42:33 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Poul-Henning Kamp
ce9edcf5b5 Merge the cons.c and cons.h to the best of my ability. alpha may or
may not compile, I can't test it.
1999-08-09 10:35:05 +00:00
Kazutaka YOKOTA
de22efc974 The following patch will remove a hack introduced in
/sys/ddb/db_input.c rev 1.19 to recognize syscons's cursor keycodes.
It is unnecessary now that scgetc() in syscons returns the escape
sequence for the cursor keys rather than their raw, internal key
codes.
1999-07-14 10:53:41 +00:00
Peter Wemm
1c6989fa7e Quiet warnings on Alpha. (db_expr_t is a long on alpha, int on x86) 1999-07-01 19:42:56 +00:00
Bruce Evans
c3ba51a722 Removed an especially bogus cast. 1999-05-13 13:01:46 +00:00
Bruce Evans
07f6cad7a0 Restored used include of <sys/systm.h>. -Wmissing-prototypes doesn't work
for builtin functions.
1999-05-13 06:07:44 +00:00
Poul-Henning Kamp
3000820ae0 add some amount of sanity to the way the gdb stuff finds its device.
I'm not too happy about the result either, but at least it has less
chance of backfiring.

This particular feature could be called "a mess" without offending
anybody.
1999-05-09 10:51:13 +00:00
Kirk McKusick
5c92a5b353 Get rid of extern declarations on gdb stuff so systems compiled without
DDB will compile. Warn users that try to use GDB without specifying a GDB
port in their configuration file.
1999-05-07 23:08:23 +00:00
Bruce Evans
1e66367c66 Fixed -Wcast-qual warnings. 1999-02-12 12:44:19 +00:00
Bruce Evans
ad6d29b0ac Fixed fatal type mismatches in the aout case. Const poisoning in
db_sym.h had not reached here.
1999-02-12 12:15:07 +00:00
Matthew Dillon
fe08c21a53 Fix warnings in preparation for adding -Wall -Wcast-qual to the
kernel compile.

    This commit includes significant work to proper handle const arguments
    for the DDB symbol routines.
1999-01-27 23:45:44 +00:00
Matthew Dillon
a1c1e16ada Changes to support -Wall, -Wcast-qual. Had to make physical code changes
in db_lookup() to avoid the *cp = 0 / *cp = ':' combo ( temporary
    nul-terminate-then-restore-original ) on a const char * string.
1999-01-27 19:00:49 +00:00
John Polstra
0ec81012da Replace includes of <sys/kernel.h> with includes of
<sys/linker_set.h> in those files that use only the linker set
definitions.
1999-01-14 06:22:10 +00:00
Archie Cobbs
2127f26023 Examine all occurrences of sprintf(), strcat(), and str[n]cpy()
for possible buffer overflow problems. Replaced most sprintf()'s
with snprintf(); for others cases, added terminating NUL bytes where
appropriate, replaced constants like "16" with sizeof(), etc.

These changes include several bug fixes, but most changes are for
maintainability's sake. Any instance where it wasn't "immediately
obvious" that a buffer overflow could not occur was made safer.

Reviewed by:	Bruce Evans <bde@zeta.org.au>
Reviewed by:	Matthew Dillon <dillon@apollo.backplane.com>
Reviewed by:	Mike Spengler <mks@networkcs.com>
1998-12-04 22:54:57 +00:00
Peter Wemm
456aa5a8cf Forgot to commit this; the alpha uses the kld symbol interface now. The
tables that db_elf.c is expecting are not loaded in that format any more.
1998-10-15 02:01:50 +00:00
Peter Wemm
c6b72a39e9 Call some helper routines to be supplied by kern_linker.c in order to
get to all the symbol tables for all modules, not just the core kernel
symbol table.  Yes, DDB can see KLD module symbols with this, both by
lookup and in tracebacks.  No more references to _end from tracebacks
within an LKM. :-)
1998-10-09 23:34:09 +00:00
Peter Wemm
286896fe56 At the moment, the alpha tentatively uses the ddb elf code rather than KLD,
because the alpha boot loader hasn't been converted yet, and because
it needs the full symbol tables with local symbols in order to make sense
of stack tracebacks.  KLD will implement this (using full sybmol table
rather than the globals only) shortly.
1998-10-09 23:32:03 +00:00
Peter Wemm
ea4170d0f6 We don't compile this on an elf kernel (and explicitly not on alpha in
case it's possible to compile in something like ECOFF)
The three db_xxx.c symbol interfaces are "standard" because config isn't
flexible enough without forcing the user to know about it.
1998-10-09 23:29:44 +00:00
Doug Rabson
bcf270989f Update to work with the new elf headers. 1998-08-17 08:06:31 +00:00
Bruce Evans
748993b899 Added macros __printflike() and __scanflike() to <sys/cdefs.h>.
Use them to `make gcc -Wformat' check formats for all printf-like
and scanf-like functions in /usr/src except for the err()/warn()
family.  err() isn't quite printf-like since its format arg can
legitimately be NULL.  syslog() isn't quite printf-like, but gcc
already accepts %m, even for plain printf() when it shouldn't.
1998-07-13 06:45:23 +00:00
Bruce Evans
596dfc04ed Use not-so-new printf formats %r and/or %z instead of %n and/or %+x. 1998-07-08 10:53:58 +00:00
Bruce Evans
3da6ef3c3a Fixed bogus type of valuep in struct db_variable. It was `int *' and
became `long *' for alpha, but should always have been `db_expr_t *'.
Fixed variable types to match.
1998-07-08 09:11:43 +00:00
Bruce Evans
90163a9b33 Fixed db_printf format errors. 1998-07-08 06:43:57 +00:00
Bruce Evans
b1bf7bc679 Fixed db_printf format errors (except for ones using broken extensions
(nonstandard %n and '+' with %x), and ones not found by -Wformat on
386's (some db_expr_t's are still printed as ints).

I decided not to change the arg type for %n from [unsigned] int to
register_t, since about half of the uses of %n are to print plain
ints and casting to [unsigned] long for %n is no harder than for %x.
1998-07-08 06:27:22 +00:00
Doug Rabson
46e5fdffb9 Remove the two single step breakpoints in the reverse order of setting to
ensure that single stepping a branch to the next instruction works.
1998-07-05 10:12:18 +00:00
Doug Rabson
398a2b53c4 Add symtab parameter to X_db_symbol_values. 1998-07-05 10:11:20 +00:00
Doug Rabson
1bfc653bbc Support 'g' format for printing 8 byte values. 1998-07-05 10:10:33 +00:00
Doug Rabson
c2e7b2e40f Forgot to mention:
Obtained from: NetBSD
1998-06-28 00:59:26 +00:00
Doug Rabson
0282b90962 Add DDB symbol support for ELF and KLD. The KLD support only supports global
symbols so its not too useful.  Changes to the kernel linker to allow it to
supply DDB with symbols will come later.
1998-06-28 00:57:28 +00:00
Doug Rabson
6edf3d9144 Supply the symbol table as an argument to X_db_symbol_values (required for elf). 1998-06-28 00:55:02 +00:00
Doug Rabson
7045d394b1 Use db_addr_t for the breakpoint address in db_set_single_step. 1998-06-28 00:52:50 +00:00
Doug Rabson
431e760b94 Make db_tok_number a long to allow typing 64bit numbers on alpha. 1998-06-27 15:40:56 +00:00
Doug Rabson
c111a701df Use %+11ln for printing in r format to make it work for 64bit registers. 1998-06-27 15:39:51 +00:00
Doug Rabson
897cd717a5 Add initial support for the FreeBSD/alpha kernel. This is very much a
work in progress and has never booted a real machine.  Initial
development and testing was done using SimOS (see
http://simos.stanford.edu for details).  On the SimOS simulator, this
port successfully reaches single-user mode and has been tested with
loads as high as one copy of /bin/ls :-).

Obtained from: partly from NetBSD/alpha
1998-06-10 10:57:29 +00:00
Doug Rabson
aebed8b0ba Make DDB work again after I broke it :-(. 1998-06-08 08:43:20 +00:00
Bruce Evans
d85b9b2c4a Backed out previous commit, which just consisted of a 1-byte editing
error.
1998-06-08 02:15:37 +00:00
Bruce Evans
8fe48b7aed Fixed missing ifdefs and disordering in previous commit. 1998-06-08 02:12:19 +00:00
Bruce Evans
4204c166b4 Fixed ifdef bogotification in previous commit. 1998-06-08 02:11:19 +00:00
Doug Rabson
ecbb00a262 This commit fixes various 64bit portability problems required for
FreeBSD/alpha.  The most significant item is to change the command
argument to ioctl functions from int to u_long.  This change brings us
inline with various other BSD versions.  Driver writers may like to
use (__FreeBSD_version == 300003) to detect this change.

The prototype FreeBSD/alpha machdep will follow in a couple of days
time.
1998-06-07 17:13:14 +00:00
Poul-Henning Kamp
e796e00de3 Some cleanups related to timecounters and weird ifdefs in <sys/time.h>.
Clean up (or if antipodic: down) some of the msgbuf stuff.

Use an inline function rather than a macro for timecounter delta.

Maintain process "on-cpu" time as 64 bits of microseconds to avoid
needless second rollover overhead.

Avoid calling microuptime the second time in mi_switch() if we do
not pass through _idle in cpu_switch()

This should reduce our context-switch overhead a bit, in particular
on pre-P5 and SMP systems.

WARNING:  Programs which muck about with struct proc in userland
will have to be fixed.

Reviewed, but found imperfect by:       bde
1998-05-28 09:30:28 +00:00
Poul-Henning Kamp
aec5a849f9 Redo the previous commit in a more Bruce-friendly fashion.
Urged by:	bde
1998-05-19 18:42:09 +00:00
Poul-Henning Kamp
7ee17eea02 Add "show msgbuf" command 1998-05-19 11:02:24 +00:00
Bruce Evans
b7aa38c1e3 Ensure that the linker sets for commands exist by putting a standard
command in each of them.  This removes the need for hard-to-configure
dummy instantiations of the sets.
1998-02-13 02:19:29 +00:00
Eivind Eklund
303b270b0a Staticize. 1998-02-09 06:11:36 +00:00
John Dyson
d4060a8751 Some fixes from John Hood:
1) Fix the initialization of malloc structure that changed
		due to perf opt.
	2) Remove unneeded include.
	3) An initialization assert added to malloc.
Submitted by:	John Hood <cgull@smoke.marlboro.vt.us>
1997-12-05 05:36:58 +00:00
Bruce Evans
41630a0133 Cleaned up revs.1.19-1.21: 1997-11-20 16:53:23 +00:00
Mike Smith
d984ae1e05 A better fix for the ddb command history buffer problem; use a static
buffer instead of trying to use malloc() in the input routine.
Submitted by:	john hood <cgull@smoke.marlboro.vt.us>
1997-11-09 06:30:29 +00:00
Mike Smith
e7c818b53b Don't try to do anything with the input history if MALLOC() for the buffer
failed.

This broke early debugging.
1997-11-07 02:34:50 +00:00
Bruce Evans
31ef058922 Fixed scrolling. Newline at the "--More--" prompt scrolled 2 lines. 1997-10-09 00:20:00 +00:00
Poul-Henning Kamp
c69c1d52e9 Print the filename, not the directory we compiled in. 1997-09-28 08:34:46 +00:00
Joerg Wunsch
ce8a015412 Minor hack to also allow for syscons's "interesting" arrow keys.
I'm using "#if __i386__ && __FreeBSD__" to check for a ``potentially
syscons-relevant environment''.  Hope that's ok...
1997-08-17 21:21:50 +00:00
Bruce Evans
94e24bf0f5 Some staticized variables were still declared to be extern. 1997-06-30 23:54:50 +00:00
Bruce Evans
b2b392c442 Don't depend on gcc's feature of interpreting `int foo(c) char c; ...'
as `int foo(char c) ...' if there is a bogus prototype `int foo(char c);'
in scope.
1997-06-30 23:49:17 +00:00
Bruce Evans
eac3100416 Removed unused #includes. 1997-06-14 11:52:37 +00:00
Joerg Wunsch
eae6ab5e98 Everyone's favorite, i think: make DDB understand the arrow keys for the
basic cursor movements.  Assumes ANSI/DEC tty, but you can still resort
to plain emacs ^p/^n etc anyway.
1997-04-12 17:35:02 +00:00
Bruce Evans
b9478d127e Fixed gratuitous ANSIisms. 1997-04-01 14:31:06 +00:00
Bruce Evans
4b4aeb2591 Added a setjmp() so that an initial pc that points to unmapped memory
isn't fatal.  Backed out rev.1.6, which handled special cases of this.
1997-03-28 12:39:43 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
John Dyson
996c772f58 This is the kernel Lite/2 commit. There are some requisite userland
changes, so don't expect to be able to run the kernel as-is (very well)
without the appropriate Lite/2 userland changes.

The system boots and can mount UFS filesystems.

Untested: ext2fs, msdosfs, NFS
Known problems: Incorrect Berkeley ID strings in some files.
		Mount_std mounts will not work until the getfsent
		library routine is changed.

Reviewed by:	various people
Submitted by:	Jeffery Hsu <hsu@freebsd.org>
1997-02-10 02:22:35 +00:00
Bruce Evans
7d350e7256 Fixed printing of small offsets. E.g., -4(%ebp) is now printed
as -0x4(%ebp) instead of as _APTD+0xffc(%ebp), and if GUPROF is
defined, 8(%ebp) is now printed as 0x8(%ebp) instead of as
GMON_PROF_HIRES+0x4(%ebp).
1997-01-16 11:27:11 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Bruce Evans
5778f6adb2 Fixed bogus linkage of one of the ddb linker sets. 1996-12-18 17:58:24 +00:00
Julian Elischer
75680b05c6 if there is no console, cngetc should act like getc and return -1
make callers aware of this in those cases where it can occur.
1996-10-30 21:40:25 +00:00
Bruce Evans
c7c34a24a3 Attached vm ddb commands show map', show vmochk', `show object',
`show vmopag', `show page' and `show pageq'.  Moved all vm ddb stuff
to the ends of the vm source files.

Changed printf() to db_printf(), `indent' to db_indent, and iprintf()
to db_iprintf() in ddb commands.  Moved db_indent and db_iprintf()
from vm to ddb.

vm_page.c:
Don't use __pure.  Staticized.

db_output.c:
Reduced page width from 80 to 79 to inhibit double spacing for long
lines (there are still some problems if words are printed across
column 79).
1996-09-14 11:54:59 +00:00
Bruce Evans
6337f4efa8 Support statically attaching of ddb commands in non-ddb modules.
The details are hidden in the DB_COMMAND(cmd_name, func_name) and
DB_SHOW_COMMAND(cmd_name, func_name) macros.  DB_COMMAND() adds to
the top-level ddb command table and DB_SHOW_COMMAND adds to the
`show' subtable.  Most external commands will probably be `show'
commands with no side effects.  They should check their pointer
args more carefully than `show map' :-), or ddb should trap internal
faults better (like it does for memory accesses).

The vm ddb commands are temporarily unattached.

ddb.h:
Also declare `db_indent' and db_iprintf() which will replace vm's
`indent' and iprintf().
1996-09-14 09:13:15 +00:00
Paul Traina
ad146781b1 Allow the user to switch into gdb mode from ddb 1996-08-27 19:46:28 +00:00
Joerg Wunsch
b463077353 Finally implement a simple commandline history in DDB.
Emacs-style line editing has already been there (did anybody ever
notice this? :), so i `only' had to add ^P and ^N.  The approach is
fairly minimalistic, with the advantage of keeping the bloat as small
as 864 bytes of .text and 16 bytes of .bss, plus 10*120 bytes
malloc'ed history buffer at the first use.
1996-08-10 13:38:44 +00:00
Peter Wemm
4a32095f34 A small bit of defensive programming in case the panic is during process
exit and cleanup.  the 'ps' command assumes that there are always 'nproc'
processes on the lists and will walk off the end without checking if not,
causing ddb to trap during the 'ps' command.
1996-06-15 07:08:02 +00:00
Gary Palmer
6ddbf1e299 Clean up various compiler warnings. Most (if not all) were benign
Reviewed by:	bde
1996-05-08 04:29:08 +00:00
Jeffrey Hsu
6ad138306c For Lite2: proc LIST changes.
Reviewed by:	david & bde
1996-03-11 05:55:56 +00:00
Poul-Henning Kamp
d7c0e66f38 Remove some now unused printfoids. 1996-01-23 21:17:59 +00:00
Bruce Evans
ad9c135ece Fixed the one remaining %r. 1996-01-21 19:18:46 +00:00
Poul-Henning Kamp
ce723857c4 One missed printf in the debugger.
Found By: bde
1996-01-21 16:30:43 +00:00
Poul-Henning Kamp
791d77e0dd Get rid of two and a half printf in the kernel.
Add more features to the one remaining to handle the job:
	+	signed quantity.
	#	alternate format
	-	left padding
	*	read width as next arg.
	n	numeric in (argument specified) default radix.

Fix the DDB debugger to use these.
Use vprintf in debug routine in pcvt.

The warnings from gcc may become more wrong and  intolerable because
of this.

Warning:  I have not checked the entire source for unsupported or
changed constructs, but generally belive that there are only a few.

Suggested by: bde
1996-01-15 22:41:03 +00:00
Bruce Evans
5ccbc3cc5a Reduced and cleaned up #includes. 1995-12-10 19:08:32 +00:00
Poul-Henning Kamp
25eb640d90 Staticize and cleanup. 1995-12-10 13:32:43 +00:00
David Greenman
efeaf95a41 Untangled the vm.h include file spaghetti. 1995-12-07 12:48:31 +00:00
Poul-Henning Kamp
f73a856d23 Staticized and '#ifdef notused' stuff we don't use. 1995-11-29 10:25:50 +00:00
Bruce Evans
058284fceb Completed function declarations and/or added prototypes and/or #includes
to get the prototypes.

Changed some `int's to `boolean_t's.  boolean_t's are ints so they are
hard to distinguish from ints.

Converted function headers to old-style.  ddb is written in K&R1 C
except where we broke it.
1995-11-24 14:13:42 +00:00
Bruce Evans
4753168fae Completed function declarations and/or added prototypes.
Removed `extern' from prototypes.
Sorted prototypes.
Uniformized idempotency ifdefs.
1995-11-24 13:53:05 +00:00
Bruce Evans
d1dae4c8c1 Change db_ps() to have the correct number and type of args for a ddb
command.
1995-08-27 02:40:39 +00:00
Bruce Evans
976794d967 Change db_fncall() and db_panic() to have the correct number and type of
args for a ddb command.
1995-08-27 02:39:39 +00:00
David Greenman
8d05fa89fb Make db_ps tolerant of uninitialized struct proc fields. Improved 'more'
function to work like you'd expect. Other misc cleanup.
1995-08-20 05:25:11 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
David Greenman
751b0b8e10 Print the address associated with an examine. Changed db_maxoff to
something more reasonable (64k). Suggested by Gordon Ross about a
year ago.
1995-05-22 13:07:12 +00:00
David Greenman
2e837708b1 Fixed the formatting breakage I added in the previous commit. 1995-04-04 01:35:33 +00:00
David Greenman
9f22c23da7 Fixed DDB's "ps" output formatting. 1995-03-28 23:29:52 +00:00
David Greenman
edf8a81561 Removed redundant newlines that were in some panic strings. 1995-03-19 14:29:26 +00:00
Bruce Evans
b5e8ce9f12 Add and move declarations to fix all of the warnings from `gcc -Wimplicit'
(except in netccitt, netiso and netns) and most of the warnings from
`gcc -Wnested-externs'.  Fix all the bugs found.  There were no serious
ones.
1995-03-16 18:17:34 +00:00
Joerg Wunsch
2389804061 Make `p'' an explicit alias for `print'' instead of being an
implicit alias for ``panic'', since this seems to be more rational.
1995-03-05 22:56:21 +00:00
Poul-Henning Kamp
3eac488435 Added "panic" command to ddb, so we can do something sensible even if
we have no symbols.
1995-02-05 21:09:04 +00:00
Bruce Evans
b5d89ca8ad Load the kernel symbol table in the boot loader and not at compile time.
(Boot with the -D flag if you want symbols.)

Make it easier to extend `struct bootinfo' without losing either forwards
or backwards compatibility.

ddb_aout.c:
Get the symbol table from wherever the loader put it.
Nuke db_symtab[SYMTAB_SPACE].

boot.c:
Enable loading of symbols.  Align them on a page boundary.  Add printfs
about the symbol table sizes.
Pass the memory sizes to the kernel.
Fix initialization of `unit' (it got moved out of the loop).
Fix adding the bss size (it got moved inside an ifdef).
Initialize serial port when RB_SERIAL is toggled on.
Fix comments.
Clean up formatting of recently added code.

io.c:
Clean up formatting of recently added code.

netboot/main.c, machdep.c, wd.c:
Change names of bootinfo fields.

LINT:
Nuke SYMTAB_SPACE.
Fix comment about DODUMP.

Makefile.i386:
Nuke use of dbsym.
Exclude gcc symbols from kernel unless compiling with -g.
Remove unused macro.
Fix comments and formatting.

genassym.c:
Generate defines for some new bootinfo fields.  Change names of old ones.

locore.s:
Copy only the valid part of the `struct bootinfo' passed by the loader.
Reserve space for symbol table, if any.

machdep.c:
Check the memory sizes passed by the loader, if any.  Don't use them yet.

bootinfo.h:
Add a size field so that we can resolve some mismatches between the loader
bootinfo and the kernel boot info.  The version number is not so good for
this because of historical botches and because it's harder to maintain.
Add memory size and symbol table fields.  Change the names of everything.

Hacks to save a few bytes:

asm.S, boot.c, boot2.S:
Replace `ouraddr' by `(BOOTSEG << 4)'.

boot.c:
Don't statically initialize `loadflags' to 0.  Disable the "REDUNDANT"
code that skips the BIOS variables.  Eliminate `total'.  Combine some
more printfs.

boot.h, disk.c, io.c, table.c:
Move all statically initialzed data to table.c.

io.c:
Don't put the A20 gate bits in a variable.
1995-01-25 21:40:47 +00:00
Bruce Evans
d2984da171 Print "(null)" instead of crashing for null strings. Null names are
often generated for stack traces.  Now inspection of unmapped addresses
no longer panics the system.
1994-10-30 20:55:44 +00:00