[src/trunk]: src/external/cddl/osnet/dev/fbt fbt_provide_module_cb: exclude s...

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/5cb57add1a95
branches:  trunk
changeset: 770508:5cb57add1a95
user:      yamt <yamt%NetBSD.org@localhost>
date:      Wed Oct 19 10:55:50 2011 +0000

description:
fbt_provide_module_cb: exclude some functions known unsafe to probe

diffstat:

 external/cddl/osnet/dev/fbt/fbt.c |  17 ++++++++++++++++-
 1 files changed, 16 insertions(+), 1 deletions(-)

diffs (31 lines):

diff -r d788decc10c2 -r 5cb57add1a95 external/cddl/osnet/dev/fbt/fbt.c
--- a/external/cddl/osnet/dev/fbt/fbt.c Wed Oct 19 10:53:12 2011 +0000
+++ b/external/cddl/osnet/dev/fbt/fbt.c Wed Oct 19 10:55:50 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fbt.c,v 1.9 2011/08/31 21:57:16 christos Exp $ */
+/*     $NetBSD: fbt.c,v 1.10 2011/10/19 10:55:50 yamt Exp $    */
 
 /*
  * CDDL HEADER START
@@ -268,6 +268,21 @@
        if (name[0] == '_' && name[1] == '_')
                return (0);
 
+       /*
+        * Exclude some more symbols which can be called from probe context.
+        */
+       if (strcmp(name, "x86_curcpu") == 0 /* CPU */
+           || strcmp(name, "x86_curlwp") == 0 /* curproc, curlwp, curthread */
+           || strcmp(name, "cpu_index") == 0 /* cpu_number, curcpu_id */
+           || strncmp(name, "db_", 3) == 0 /* debugger */
+           || strncmp(name, "ddb_", 4) == 0 /* debugger */
+           || strncmp(name, "kdb_", 4) == 0 /* debugger */
+           || strncmp(name, "lockdebug_", 10) == 0 /* lockdebug XXX for now */
+           || strncmp(name, "kauth_", 5) == 0 /* CRED XXX for now */
+           ) {
+               return 0;
+       }
+
        instr = (u_int8_t *) value;
        limit = (u_int8_t *) value + symsize;