From: Masami Hiramatsu <mhiramat@kernel.org>
To: Ingo Molnar <mingo@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
peterz@infradead.org,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Andrea Righi <righi.andrea@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>
Subject: [PATCH v2 2/9] x86/kprobes: Move trampoline code into RODATA
Date: Sat, 12 Jan 2019 11:26:37 +0900 [thread overview]
Message-ID: <154725999715.18060.12029300333454823166.stgit@devbox> (raw)
In-Reply-To: <154725993986.18060.2759150647140353514.stgit@devbox>
Move optprobe trampoline code into RODATA since it is
not executed, but copied and modified to be used on
a trampoline buffer.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
arch/x86/kernel/kprobes/opt.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c
index 544bd41a514c..f14262952015 100644
--- a/arch/x86/kernel/kprobes/opt.c
+++ b/arch/x86/kernel/kprobes/opt.c
@@ -97,6 +97,7 @@ static void synthesize_set_arg1(kprobe_opcode_t *addr, unsigned long val)
}
asm (
+ ".pushsection .rodata\n"
"optprobe_template_func:\n"
".global optprobe_template_entry\n"
"optprobe_template_entry:\n"
@@ -136,16 +137,10 @@ asm (
#endif
".global optprobe_template_end\n"
"optprobe_template_end:\n"
- ".type optprobe_template_func, @function\n"
- ".size optprobe_template_func, .-optprobe_template_func\n");
+ ".popsection\n");
void optprobe_template_func(void);
STACK_FRAME_NON_STANDARD(optprobe_template_func);
-NOKPROBE_SYMBOL(optprobe_template_func);
-NOKPROBE_SYMBOL(optprobe_template_entry);
-NOKPROBE_SYMBOL(optprobe_template_val);
-NOKPROBE_SYMBOL(optprobe_template_call);
-NOKPROBE_SYMBOL(optprobe_template_end);
#define TMPL_MOVE_IDX \
((long)optprobe_template_val - (long)optprobe_template_entry)
next prev parent reply other threads:[~2019-01-12 2:27 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-12 2:25 [PATCH v2 0/9] kprobes: Fix and improve blacklist symbols Masami Hiramatsu
2019-01-12 2:26 ` [PATCH v2 1/9] x86/kprobes: Prohibit probing on optprobe template code Masami Hiramatsu
2019-01-12 2:26 ` Masami Hiramatsu [this message]
2019-01-12 2:27 ` [PATCH v2 3/9] x86/kprobes: Prohibit probing on functions before kprobe_int3_handler() Masami Hiramatsu
2019-01-12 2:27 ` [PATCH v2 4/9] x86/kprobes: Prohibit probing on IRQ handlers directly Masami Hiramatsu
2019-01-12 2:28 ` [PATCH v2 5/9] kprobes: Search non-suffixed symbol in blacklist Masami Hiramatsu
2019-01-14 16:16 ` Steven Rostedt
2019-01-12 2:28 ` [PATCH v2 6/9] kprobes: Prohibit probing on hardirq tracers Masami Hiramatsu
2019-01-12 2:28 ` [PATCH v2 7/9] kprobes: Prohibit probing on preempt_check debug functions Masami Hiramatsu
2019-01-12 2:29 ` [PATCH v2 8/9] kprobes: Prohibit probing on RCU debug routine Masami Hiramatsu
2019-01-12 2:29 ` [PATCH v2 9/9] kprobes: Prohibit probing on lockdep functions Masami Hiramatsu
2019-01-12 13:33 ` [PATCH v2 0/9] kprobes: Fix and improve blacklist symbols Andrea Righi
2019-01-13 14:23 ` Masami Hiramatsu
2019-01-14 16:18 ` Steven Rostedt
2019-02-01 13:31 ` Masami Hiramatsu
2019-02-11 13:50 ` Ingo Molnar
2019-02-12 16:48 ` Masami Hiramatsu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=154725999715.18060.12029300333454823166.stgit@devbox \
--to=mhiramat@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=righi.andrea@gmail.com \
--cc=rostedt@goodmis.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox