Trailing whitespace

Print db> prompt in db_read_line(), not db_readline().

The former is what DDB repl calls. The latter performs the actual
input so let other code use it without the unwanted db> prompt. It's
already used by ACPI (and AcpiOsWaitCommandReady supplies its own
prompt). I also use it for my uncommitted Forth scripting for DDB.

branches: 1.26.60; 1.26.64;
Define db_hist_put() only when DDB_HISTORY_SIZE != 0 so that
build successes on ports like hpcarm.

Fix indent in prevous commit.

Don't overflow DDB command history. Coyote Point changelist description:

DDB is flakey. The command history wanders past the bounds. Way
past. When it hits some boolean that indicates a.out format symbol
tables are to be used, and here is the pointer to the function, the
call thru the NULL function pointer renders the debug session entirely
unsatisfactory, outcome wise.

branches: 1.23.2; 1.23.4;
Make ddb compile and work in userspace. Mostly this is comprised of three
types of changes:

- Add a few new methods to replace stuff like p_find(), CPU_INFO_FOREACH.

- Use db_read_bytes() instead of accessing kernel structures directly,
and similar changes.

- Add ifdef _KERNEL where the above hasn't been done, and an XXX comment.

branches: 1.22.42; 1.22.52; 1.22.58;
TRUE -> true, FALSE -> false

branches: 1.21.26;
merge ktrace-lwp.

branches: 1.20.2;
Add lots of const.

branches: 1.19.6;
Dump DDB_* and SYMTAB_SPACE options to opt_ddbparam.h rather than opt_ddb.h.
These options are used in limited files but #include "opt_ddb.h" are
everywhere, and changing them caused almost full recompilation.

/*CONTCOND*/ while (0)'ed macros

ANSIfy, KNF.
Make some variables and functions static when not used outside of a module.
Make variables in headers extern.
Delete the unused db_find_watchpoint() function.

- pull in opt_kgdb.h where necessary
- replace opt_kgdb_machdep.h with opt_kgdb.h
- defparam opt_kgdb.h:
KGDB_DEV KGDB_DEVNAME KGDB_DEVADDR KGDB_DEVRATE KGDB_DEVMODE
- move from opt_ddbparam.h to opt_ddb.h:
DDB_FROMCONSOLE DDB_ONPANIC DDB_HISTORY_SIZE DDB_BREAK_CHAR SYMTAB_SPACE
- replace KGDBDEV with KGDB_DEV
- replace KGDBADDR with KGDB_DEVADDR
- replace KGDBMODE with KGDB_DEVMODE
- replace KGDBRATE with KGDB_DEVRATE
- use `9600' instead of `0x2580' for 9600 baud rate
- use correct quotes for options KGDB_DEVNAME="\"com\""
- use correct quotes for options KGDB_DEV="17*256+0"
- remove unnecessary dependancy on Makefile for kgdb_stub.o
- minor whitespace cleanup

add RCSIDs

branches: 1.14.2; 1.14.4;
Fix CTRL-T to behave properly. It should swaps the current and previous
characters, not the previous and second-to-previous.

Die, register, die!

branches: 1.12.2;
Quote "AS IS" as in the majority of Carnegy Mellon notices.

Fix a pasto in copyright text which has been procreating like rabbits..

branches: 1.10.8;
defopt DDB.

s/DB_HISTORY_SIZE/DDB_HISTORY_SIZE/, for consistency with other DDB #defines

PR/4504: Tero Kivinen: Add DB_HISTORY_SIZE option to enable history in ddb

DDB prototype changes.

Remove bogus definition of cnpollc().

db_error() does not return.

New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

Canonicalize all #includes.

branches: 1.2.4;
add explicit rcs id

branches: 1.1.1;
Initial revision