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| author | jkh <jkh@FreeBSD.org> | 1996-04-13 11:57:18 +0000 |
|---|---|---|
| committer | jkh <jkh@FreeBSD.org> | 1996-04-13 11:57:18 +0000 |
| commit | e09f62677a421d856ae544d2d06e7b6761097e5c (patch) | |
| tree | 8f4edc0f409a792a174c8f5b950abf0115148214 /sys/i386/boot | |
| parent | 0a6e60012a6e2358cc8998602acd003037795f09 (diff) | |
| download | FreeBSD-src-e09f62677a421d856ae544d2d06e7b6761097e5c.zip FreeBSD-src-e09f62677a421d856ae544d2d06e7b6761097e5c.tar.gz | |
Document how to drop into DDB from a serial console.
Diffstat (limited to 'sys/i386/boot')
| -rw-r--r-- | sys/i386/boot/biosboot/README.serial | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/sys/i386/boot/biosboot/README.serial b/sys/i386/boot/biosboot/README.serial index c9af4d1..d57ae50 100644 --- a/sys/i386/boot/biosboot/README.serial +++ b/sys/i386/boot/biosboot/README.serial @@ -69,6 +69,15 @@ To boot FreeBSD in serial console mode, you must do the following: in order to connect the terminal to the PC's serial port. If you don't have one, go to Radio Shack and buy one: they're cheap. + NOTE #3: + If you wish to drop into the kernel debugger from the serial console + (useful for remote diagnostics, but also dangerous if you generate a + spurious BREAK on the serial port!) then you should compile your kernel + with the following options: + + options BREAK_TO_DEBUGGER + options DDB + - BOOT THE MACHINE. The boot block will probe for a keyboard on your system. If it fails to find one, you'll see a prompt appear on the terminal that looks something like this: @@ -152,4 +161,4 @@ CAVEATS: from the new kernel. -$Id: README.serial,v 1.3 1995/04/20 23:15:07 joerg Exp $ +$Id: README.serial,v 1.4 1996/04/07 14:27:58 bde Exp $ |
