Date: Tue, 24 May 2005 21:04:56 GMT From: Peter Wemm <peter@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 77411 for review Message-ID: <200505242104.j4OL4u4o094140@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
http://perforce.freebsd.org/chv.cgi?CH=77411 Change 77411 by peter@peter_melody on 2005/05/24 21:04:25 Add two more debug sysctl's to cause messier ways of entering the debugger than the nice Debugger() call. Affected files ... .. //depot/projects/hammer/sys/kern/subr_kdb.c#10 edit Differences ... ==== //depot/projects/hammer/sys/kern/subr_kdb.c#10 (text+ko) ==== @@ -66,6 +66,8 @@ static int kdb_sysctl_available(SYSCTL_HANDLER_ARGS); static int kdb_sysctl_current(SYSCTL_HANDLER_ARGS); static int kdb_sysctl_enter(SYSCTL_HANDLER_ARGS); +static int kdb_sysctl_panic(SYSCTL_HANDLER_ARGS); +static int kdb_sysctl_trap(SYSCTL_HANDLER_ARGS); SYSCTL_NODE(_debug, OID_AUTO, kdb, CTLFLAG_RW, NULL, "KDB nodes"); @@ -78,6 +80,12 @@ SYSCTL_PROC(_debug_kdb, OID_AUTO, enter, CTLTYPE_INT | CTLFLAG_RW, 0, 0, kdb_sysctl_enter, "I", "set to enter the debugger"); +SYSCTL_PROC(_debug_kdb, OID_AUTO, panic, CTLTYPE_INT | CTLFLAG_RW, 0, 0, + kdb_sysctl_panic, "I", "set to panic the kernel"); + +SYSCTL_PROC(_debug_kdb, OID_AUTO, trap, CTLTYPE_INT | CTLFLAG_RW, 0, 0, + kdb_sysctl_trap, "I", "set cause a page fault"); + /* * Flag indicating whether or not to IPI the other CPUs to stop them on * entering the debugger. Sometimes, this will result in a deadlock as @@ -174,6 +182,38 @@ return (0); } +static int +kdb_sysctl_panic(SYSCTL_HANDLER_ARGS) +{ + int error, i; + + error = sysctl_wire_old_buffer(req, sizeof(int)); + if (error == 0) { + i = 0; + error = sysctl_handle_int(oidp, &i, 0, req); + } + if (error != 0 || req->newptr == NULL) + return (error); + panic("kdb_sysctl_panic"); + return (0); +} + +static int +kdb_sysctl_trap(SYSCTL_HANDLER_ARGS) +{ + int error, i; + int *addr = (int *)0x10; + + error = sysctl_wire_old_buffer(req, sizeof(int)); + if (error == 0) { + i = 0; + error = sysctl_handle_int(oidp, &i, 0, req); + } + if (error != 0 || req->newptr == NULL) + return (error); + return (*addr); +} + /* * Solaris implements a new BREAK which is initiated by a character sequence * CR ~ ^b which is similar to a familiar pattern used on Sun servers by the
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200505242104.j4OL4u4o094140>