linux-kernel - [tip:perf/core] kprobes/x86: Show x86-64 specific blacklisted symbols correctly

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Message-ID: <tip-fe6e65615415987629a2dda583b4495677d8c388@git.kernel.org>
Date:   Mon, 17 Dec 2018 10:19:30 -0800
From:   tip-bot for Masami Hiramatsu <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, linux-kernel@...r.kernel.org,
        mhiramat@...nel.org, naveen.n.rao@...ux.vnet.ibm.com,
        peterz@...radead.org, anil.s.keshavamurthy@...el.com, yhs@...com,
        bp@...en8.de, torvalds@...ux-foundation.org, tglx@...utronix.de,
        righi.andrea@...il.com, hpa@...or.com, davem@...emloft.net,
        luto@...nel.org
Subject: [tip:perf/core] kprobes/x86: Show x86-64 specific blacklisted
 symbols correctly

Commit-ID:  fe6e65615415987629a2dda583b4495677d8c388
Gitweb:     https://git.kernel.org/tip/fe6e65615415987629a2dda583b4495677d8c388
Author:     Masami Hiramatsu <mhiramat@...nel.org>
AuthorDate: Mon, 17 Dec 2018 17:21:24 +0900
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Mon, 17 Dec 2018 17:48:39 +0100

kprobes/x86: Show x86-64 specific blacklisted symbols correctly

Show x86-64 specific blacklisted symbols in debugfs.

Since x86-64 prohibits probing on symbols which are in
entry text, those should be shown.

Tested-by: Andrea Righi <righi.andrea@...il.com>
Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: David S. Miller <davem@...emloft.net>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Yonghong Song <yhs@...com>
Link: http://lkml.kernel.org/r/154503488425.26176.17136784384033608516.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/kprobes/core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index c33b06f5faa4..6011a4a90f0a 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -1034,6 +1034,12 @@ bool arch_within_kprobe_blacklist(unsigned long addr)
 		 addr < (unsigned long)__entry_text_end);
 }
 
+int __init arch_populate_kprobe_blacklist(void)
+{
+	return kprobe_add_area_blacklist((unsigned long)__entry_text_start,
+					 (unsigned long)__entry_text_end);
+}
+
 int __init arch_init_kprobes(void)
 {
 	return 0;