From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-arch@vger.kernel.org,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Sandeepa Prabhu <sandeepa.prabhu@linaro.org>,
x86@kernel.org, lkml <linux-kernel@vger.kernel.org>,
"Steven Rostedt (Red Hat)" <rostedt@goodmis.org>,
systemtap@sourceware.org, "David S. Miller" <davem@davemloft.net>
Subject: [PATCH -tip v6 17/22] kprobes: Show blacklist entries via debugfs
Date: Thu, 19 Dec 2013 09:10:00 -0000 [thread overview]
Message-ID: <20131219090435.14309.6218.stgit@kbuild-fedora.novalocal> (raw)
In-Reply-To: <20131219090353.14309.15496.stgit@kbuild-fedora.novalocal>
Show blacklist entries (function names with the address
range) via /sys/kernel/debug/kprobes/blacklist.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
---
kernel/kprobes.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 53 insertions(+), 8 deletions(-)
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index a21b4e6..3214289 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -2249,6 +2249,46 @@ static const struct file_operations debugfs_kprobes_operations = {
.release = seq_release,
};
+/* kprobes/blacklist -- shows which functions can not be probed */
+static void *kprobe_blacklist_seq_start(struct seq_file *m, loff_t *pos)
+{
+ return seq_list_start(&kprobe_blacklist, *pos);
+}
+
+static void *kprobe_blacklist_seq_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ return seq_list_next(v, &kprobe_blacklist, pos);
+}
+
+static int kprobe_blacklist_seq_show(struct seq_file *m, void *v)
+{
+ struct kprobe_blacklist_entry *ent =
+ list_entry(v, struct kprobe_blacklist_entry, list);
+
+ seq_printf(m, "0x%p-0x%p\t%ps\n", (void *)ent->start_addr,
+ (void *)ent->end_addr, (void *)ent->start_addr);
+ return 0;
+}
+
+static const struct seq_operations kprobe_blacklist_seq_ops = {
+ .start = kprobe_blacklist_seq_start,
+ .next = kprobe_blacklist_seq_next,
+ .stop = kprobe_seq_stop, /* Reuse void function */
+ .show = kprobe_blacklist_seq_show,
+};
+
+static int kprobe_blacklist_open(struct inode *inode, struct file *filp)
+{
+ return seq_open(filp, &kprobe_blacklist_seq_ops);
+}
+
+static const struct file_operations debugfs_kprobe_blacklist_ops = {
+ .open = kprobe_blacklist_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
static void arm_all_kprobes(void)
{
struct hlist_head *head;
@@ -2372,19 +2412,24 @@ static int __init debugfs_kprobe_init(void)
file = debugfs_create_file("list", 0444, dir, NULL,
&debugfs_kprobes_operations);
- if (!file) {
- debugfs_remove(dir);
- return -ENOMEM;
- }
+ if (!file)
+ goto error;
file = debugfs_create_file("enabled", 0600, dir,
&value, &fops_kp);
- if (!file) {
- debugfs_remove(dir);
- return -ENOMEM;
- }
+ if (!file)
+ goto error;
+
+ file = debugfs_create_file("blacklist", 0444, dir, NULL,
+ &debugfs_kprobe_blacklist_ops);
+ if (!file)
+ goto error;
return 0;
+
+error:
+ debugfs_remove(dir);
+ return -ENOMEM;
}
late_initcall(debugfs_kprobe_init);
next prev parent reply other threads:[~2013-12-19 9:10 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-19 9:09 [PATCH -tip v6 00/22] kprobes: introduce NOKPROBE_SYMBOL(), cleanup and fixes crash bugs Masami Hiramatsu
2013-12-19 9:09 ` [PATCH -tip v6 01/22] kprobes: Prohibit probing on .entry.text code Masami Hiramatsu
2013-12-19 9:09 ` [PATCH -tip v6 05/22] [BUGFIX] x86: Prohibit probing on thunk functions and restore Masami Hiramatsu
2013-12-19 9:09 ` [PATCH -tip v6 02/22] kprobes: Introduce NOKPROBE_SYMBOL() macro for blacklist Masami Hiramatsu
2013-12-19 9:09 ` [PATCH -tip v6 06/22] [BUGFIX] x86: Prohibit probing on memcpy/memset Masami Hiramatsu
2013-12-19 9:37 ` Jovi Zhangwei
2013-12-20 2:38 ` Masami Hiramatsu
2013-12-20 3:07 ` Jovi Zhangwei
2013-12-20 4:42 ` Masami Hiramatsu
2013-12-20 8:31 ` Jovi Zhangwei
2013-12-20 9:21 ` Masami Hiramatsu
2013-12-23 4:51 ` Jovi Zhangwei
2013-12-23 10:59 ` Masami Hiramatsu
2013-12-24 6:39 ` Jovi Zhangwei
2013-12-24 8:32 ` Masami Hiramatsu
2013-12-24 9:53 ` Jovi Zhangwei
2013-12-24 15:58 ` Masami Hiramatsu
2013-12-25 14:44 ` Jovi Zhangwei
2013-12-19 9:09 ` [PATCH -tip v6 03/22] [BUGFIX] kprobes/x86: Prohibit probing on debug_stack_* Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 14/22] ftrace/kprobes: Use NOKPROBE_SYMBOL macro in ftrace Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 21/22] kprobes/x86: Remove unneeded preempt_disable/enable in interrupt handlers Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 07/22] kprobes/x86: Call exception handlers directly from do_int3/do_debug Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 18/22] kprobes: Support blacklist functions in module Masami Hiramatsu
2013-12-19 9:10 ` Masami Hiramatsu [this message]
2013-12-19 9:10 ` [PATCH -tip v6 15/22] notifier: Use NOKPROBE_SYMBOL macro in notifier Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 20/22] kprobes/x86: Use kprobe_blacklist for .kprobes.text and .entry.text Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 22/22] [RFC] kprobes/x86: Add emergency recovery process for bad kprobes Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 19/22] kprobes: Use NOKPROBE_SYMBOL() in sample modules Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 09/22] kprobes: Allow probe on some kprobe functions Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 08/22] kprobes/x86: Allow probe on some kprobe preparation functions Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 10/22] ftrace/kprobes: Allow probing on some " Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 16/22] sched: Use NOKPROBE_SYMBOL macro in sched Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 04/22] [BUGFIX] x86: Prohibit probing on native_set_debugreg/load_idt Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 12/22] x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 11/22] x86: Allow kprobes on text_poke/hw_breakpoint Masami Hiramatsu
2013-12-19 9:10 ` [PATCH -tip v6 13/22] kprobes: Use NOKPROBE_SYMBOL macro instead of __kprobes Masami Hiramatsu
2013-12-19 20:46 ` [PATCH -tip v6 00/22] kprobes: introduce NOKPROBE_SYMBOL(), cleanup and fixes crash bugs Frank Ch. Eigler
2013-12-20 4:22 ` Masami Hiramatsu
2013-12-20 8:21 ` Ingo Molnar
2013-12-20 9:31 ` Masami Hiramatsu
2013-12-20 10:46 ` Ingo Molnar
2013-12-22 21:10 ` Masami Hiramatsu
2013-12-23 13:04 ` Ingo Molnar
2013-12-24 1:19 ` Masami Hiramatsu
2014-01-29 11:22 ` Masami Hiramatsu
2014-02-09 14:37 ` Ingo Molnar
2014-02-09 21:27 ` Frank Ch. Eigler
2014-02-10 4:02 ` Masami Hiramatsu
2014-02-10 11:32 ` Masami Hiramatsu
2013-12-20 13:41 ` Frank Ch. Eigler
2013-12-22 21:32 ` Masami Hiramatsu
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