From: Masami Hiramatsu <mhiramat@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org,
Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Steven Rostedt <rostedt@goodmis.org>,
linux-arch@vger.kernel.org, Tony Luck <tony.luck@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
linux-ia64@vger.kernel.org
Subject: [PATCH -tip v6 19/27] ia64: kprobes: Don't call the ->break_handler() in ia64 kprobes code
Date: Tue, 19 Jun 2018 16:13:20 +0000 [thread overview]
Message-ID: <152942480045.15209.10715901482832337704.stgit@devbox> (raw)
In-Reply-To: <152942424698.15209.15245996287444292393.stgit@devbox>
Don't call the ->break_handler() from the ia64 kprobes code,
because it was only used by jprobes which got removed.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
---
arch/ia64/include/uapi/asm/break.h | 1 -
arch/ia64/kernel/kprobes.c | 10 ----------
2 files changed, 11 deletions(-)
diff --git a/arch/ia64/include/uapi/asm/break.h b/arch/ia64/include/uapi/asm/break.h
index 5d742bcb0018..4ca110f0a94b 100644
--- a/arch/ia64/include/uapi/asm/break.h
+++ b/arch/ia64/include/uapi/asm/break.h
@@ -14,7 +14,6 @@
*/
#define __IA64_BREAK_KDB 0x80100
#define __IA64_BREAK_KPROBE 0x81000 /* .. 0x81fff */
-#define __IA64_BREAK_JPROBE 0x82000
/*
* OS-specific break numbers:
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index 823e4bd03a18..74c8524e6309 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -817,14 +817,6 @@ static int __kprobes pre_kprobes_handler(struct die_args *args)
prepare_ss(p, regs);
kcb->kprobe_status = KPROBE_REENTER;
return 1;
- } else if (args->err = __IA64_BREAK_JPROBE) {
- /*
- * jprobe instrumented function just completed
- */
- p = __this_cpu_read(current_kprobe);
- if (p->break_handler && p->break_handler(p, regs)) {
- goto ss_probe;
- }
} else if (!is_ia64_break_inst(regs)) {
/* The breakpoint instruction was removed by
* another cpu right after we hit, no further
@@ -867,7 +859,6 @@ static int __kprobes pre_kprobes_handler(struct die_args *args)
*/
return 1;
-ss_probe:
#if !defined(CONFIG_PREEMPT)
if (p->ainsn.inst_flag = INST_FLAG_BOOSTABLE && !p->post_handler) {
/* Boost up -- we can execute copied instructions directly */
@@ -990,7 +981,6 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
case DIE_BREAK:
/* err is break number from ia64_bad_break() */
if ((args->err >> 12) = (__IA64_BREAK_KPROBE >> 12)
- || args->err = __IA64_BREAK_JPROBE
|| args->err = 0)
if (pre_kprobes_handler(args))
ret = NOTIFY_STOP;
next prev parent reply other threads:[~2018-06-19 16:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <152942424698.15209.15245996287444292393.stgit@devbox>
2018-06-19 16:08 ` [PATCH -tip v6 08/27] ia64: kprobes: Remove jprobe implementation Masami Hiramatsu
2018-06-19 16:13 ` Masami Hiramatsu [this message]
2018-06-19 16:15 ` [PATCH -tip v6 24/27] bpf: error-inject: kprobes: Clear current_kprobe and enable preempt in kprobe 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=152942480045.15209.10715901482832337704.stgit@devbox \
--to=mhiramat@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=ananth@linux.vnet.ibm.com \
--cc=fenghua.yu@intel.com \
--cc=hpa@zytor.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-ia64@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=mingo@redhat.com \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=tony.luck@intel.com \
/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