Subject: kern/13826: KGDB on i386 fails w/ cn_check_magic
To: None <>
From: Allen Briggs <>
List: netbsd-bugs
Date: 08/29/2001 21:49:33
>Number:         13826
>Category:       kern
>Synopsis:       KGDB on i386 fails w/ cn_check_magic
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 29 18:45:00 PDT 2001
>Originator:     Allen Briggs
>Release:        July 17, 2001
	Wasabi Systems
	Asus & Dell x86 systems (AMD Athlon & Intel P-something) / NetBSD
	When KGDB is enabled and DDB disabled, kernel boots up to
	a point where it waits for the remote system to connect.
	Once the remote system attempts to connect, it faults with:

		kgdb: caught trap 0x6 at ...

	Where ... is in the cn_check_magic macro in com_common_getc()
	or com_common_putc().
	See above.
	Unknown.  Filing so it doesn't get lost.