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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>
Cc: x86@kernel.org, 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>,
	Laura Abbott <labbott@redhat.com>, Josef Bacik <jbacik@fb.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>,
	Vineet Gupta <vgupta@synopsys.com>,
	Russell King <linux@armlinux.org.uk>,
	Arnd Bergmann <arnd@arndb.de>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Ralf Baechle <ralf@linux-mips.org>,
	James Hogan <jhogan@kernel.org>
Subject: [PATCH -tip v4 20/27] MIPS: kprobes: Don't call the ->break_handler() in MIPS kprobes code
Date: Mon, 28 May 2018 16:09:33 +0900	[thread overview]
Message-ID: <152749137377.15132.7935753657096073570.stgit@devbox> (raw)
In-Reply-To: <152749074878.15132.16693721906742461289.stgit@devbox>

Don't call the ->break_handler() from the MIPS kprobes code,
because it was only used by jprobes which got removed.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 arch/mips/kernel/kprobes.c |   21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/arch/mips/kernel/kprobes.c b/arch/mips/kernel/kprobes.c
index efdcd0b1ce12..7fd277bc59b9 100644
--- a/arch/mips/kernel/kprobes.c
+++ b/arch/mips/kernel/kprobes.c
@@ -326,19 +326,13 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 				preempt_enable_no_resched();
 			}
 			return 1;
-		} else {
-			if (addr->word != breakpoint_insn.word) {
-				/*
-				 * The breakpoint instruction was removed by
-				 * another cpu right after we hit, no further
-				 * handling of this interrupt is appropriate
-				 */
-				ret = 1;
-				goto no_kprobe;
-			}
-			p = __this_cpu_read(current_kprobe);
-			if (p->break_handler && p->break_handler(p, regs))
-				goto ss_probe;
+		} else if (addr->word != breakpoint_insn.word) {
+			/*
+			 * The breakpoint instruction was removed by
+			 * another cpu right after we hit, no further
+			 * handling of this interrupt is appropriate
+			 */
+			ret = 1;
 		}
 		goto no_kprobe;
 	}
@@ -367,7 +361,6 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 		return 1;
 	}
 
-ss_probe:
 	prepare_singlestep(p, regs, kcb);
 	if (kcb->flags & SKIP_DELAYSLOT) {
 		kcb->kprobe_status = KPROBE_HIT_SSDONE;

WARNING: multiple messages have this Message-ID (diff)
From: Masami Hiramatsu <mhiramat@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>
Cc: x86@kernel.org, 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>,
	Laura Abbott <labbott@redhat.com>, Josef Bacik <jbacik@fb.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>,
	Vineet Gupta <vgupta@synopsys.com>,
	Russell King <linux@armlinux.org.uk>,
	Arnd Bergmann <arnd@arndb.de>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Ralf Baechle <ralf@linux-mips.org>,
	James Hogan <jhogan@kernel.org>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	Rich Felker <dalias@libc.org>,
	"David S . Miller" <davem@davemloft.net>,
	linux-arch@vger.kernel.org
Subject: [PATCH -tip v4 20/27] MIPS: kprobes: Don't call the ->break_handler() in MIPS kprobes code
Date: Mon, 28 May 2018 16:09:33 +0900	[thread overview]
Message-ID: <152749137377.15132.7935753657096073570.stgit@devbox> (raw)
Message-ID: <20180528070933.kxHDfY5ZHcxU4sJdM9yWCBAPQaZgxS7fbl6r7dlZtnk@z> (raw)
In-Reply-To: <152749074878.15132.16693721906742461289.stgit@devbox>

Don't call the ->break_handler() from the MIPS kprobes code,
because it was only used by jprobes which got removed.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 arch/mips/kernel/kprobes.c |   21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/arch/mips/kernel/kprobes.c b/arch/mips/kernel/kprobes.c
index efdcd0b1ce12..7fd277bc59b9 100644
--- a/arch/mips/kernel/kprobes.c
+++ b/arch/mips/kernel/kprobes.c
@@ -326,19 +326,13 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 				preempt_enable_no_resched();
 			}
 			return 1;
-		} else {
-			if (addr->word != breakpoint_insn.word) {
-				/*
-				 * The breakpoint instruction was removed by
-				 * another cpu right after we hit, no further
-				 * handling of this interrupt is appropriate
-				 */
-				ret = 1;
-				goto no_kprobe;
-			}
-			p = __this_cpu_read(current_kprobe);
-			if (p->break_handler && p->break_handler(p, regs))
-				goto ss_probe;
+		} else if (addr->word != breakpoint_insn.word) {
+			/*
+			 * The breakpoint instruction was removed by
+			 * another cpu right after we hit, no further
+			 * handling of this interrupt is appropriate
+			 */
+			ret = 1;
 		}
 		goto no_kprobe;
 	}
@@ -367,7 +361,6 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 		return 1;
 	}
 
-ss_probe:
 	prepare_singlestep(p, regs, kcb);
 	if (kcb->flags & SKIP_DELAYSLOT) {
 		kcb->kprobe_status = KPROBE_HIT_SSDONE;

  parent reply	other threads:[~2018-05-28  7:09 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-28  6:59 [PATCH -tip v4 00/27] kprobes: Cleanup jprobe implementation Masami Hiramatsu
2018-05-28  6:59 ` Masami Hiramatsu
2018-05-28  6:59 ` [PATCH -tip v4 01/27] Documentation/kprobes: Fix to remove remaining jprobe Masami Hiramatsu
2018-05-28  6:59   ` Masami Hiramatsu
2018-05-28  7:00 ` [PATCH -tip v4 02/27] kprobes: Remove jprobe API implementation Masami Hiramatsu
2018-05-28  7:00   ` Masami Hiramatsu
2018-05-28  7:00 ` [PATCH -tip v4 03/27] kprobes/x86: Remove jprobe implementation Masami Hiramatsu
2018-05-28  7:00   ` Masami Hiramatsu
2018-05-28  7:01 ` [PATCH -tip v4 04/27] ARC: kprobes: " Masami Hiramatsu
2018-05-28  7:01   ` Masami Hiramatsu
2018-05-28  7:01 ` [PATCH -tip v4 05/27] ARM: kprobes: Remove jprobe arm implementation Masami Hiramatsu
2018-05-28  7:01   ` Masami Hiramatsu
2018-05-28  7:02 ` [PATCH -tip v4 06/27] arm64: kprobes: Remove jprobe implementation Masami Hiramatsu
2018-05-28  7:02   ` Masami Hiramatsu
2018-05-28  7:02 ` [PATCH -tip v4 07/27] powerpc/kprobes: Remove jprobe powerpc implementation Masami Hiramatsu
2018-05-28  7:02   ` Masami Hiramatsu
2018-05-28  7:03 ` [PATCH -tip v4 08/27] ia64: kprobes: Remove jprobe implementation Masami Hiramatsu
2018-05-28  7:03   ` Masami Hiramatsu
2018-05-28  7:03 ` [PATCH -tip v4 09/27] MIPS: " Masami Hiramatsu
2018-05-28  7:03   ` Masami Hiramatsu
2018-05-28  7:04 ` [PATCH -tip v4 10/27] s390/kprobes: " Masami Hiramatsu
2018-05-28  7:04   ` Masami Hiramatsu
2018-05-28  7:04 ` [PATCH -tip v4 11/27] sh: kprobes: " Masami Hiramatsu
2018-05-28  7:04   ` Masami Hiramatsu
2018-05-28  7:05 ` [PATCH -tip v4 12/27] sparc64: " Masami Hiramatsu
2018-05-28  7:05   ` Masami Hiramatsu
2018-05-28  7:05 ` [PATCH -tip v4 13/27] kprobes: Don't check the ->break_handler() in generic kprobes code Masami Hiramatsu
2018-05-28  7:05   ` Masami Hiramatsu
2018-05-28  7:06 ` [PATCH -tip v4 14/27] kprobes/x86: Don't call ->break_handler() in x86 kprobes Masami Hiramatsu
2018-05-28  7:06   ` Masami Hiramatsu
2018-05-28  7:06 ` [PATCH -tip v4 15/27] ARC: kprobes: Don't call the ->break_handler() in ARC kprobes code Masami Hiramatsu
2018-05-28  7:06   ` Masami Hiramatsu
2018-05-28  7:07 ` [PATCH -tip v4 16/27] ARM: kprobes: Don't call the ->break_handler() in arm " Masami Hiramatsu
2018-05-28  7:07   ` Masami Hiramatsu
2018-05-28  7:08 ` [PATCH -tip v4 17/27] arm64: " Masami Hiramatsu
2018-05-28  7:08   ` Masami Hiramatsu
2018-05-28  7:08 ` [PATCH -tip v4 18/27] powerpc/kprobes: " Masami Hiramatsu
2018-05-28  7:08   ` Masami Hiramatsu
2018-05-28  7:09 ` [PATCH -tip v4 19/27] ia64: kprobes: Don't call the ->break_handler() in ia64 " Masami Hiramatsu
2018-05-28  7:09   ` Masami Hiramatsu
2018-05-28  7:09 ` Masami Hiramatsu [this message]
2018-05-28  7:09   ` [PATCH -tip v4 20/27] MIPS: kprobes: Don't call the ->break_handler() in MIPS " Masami Hiramatsu
2018-05-28  7:10 ` [PATCH -tip v4 21/27] s390/kprobes: Don't call the ->break_handler() in s390 " Masami Hiramatsu
2018-05-28  7:10   ` Masami Hiramatsu
2018-05-28  7:10 ` [PATCH -tip v4 22/27] sh: kprobes: Don't call the ->break_handler() in SH " Masami Hiramatsu
2018-05-28  7:10   ` Masami Hiramatsu
2018-05-28  7:11 ` [PATCH -tip v4 23/27] sparc64: kprobes: Don't call the ->break_handler() in sparc64 " Masami Hiramatsu
2018-05-28  7:11   ` Masami Hiramatsu
2018-05-28  7:11 ` [PATCH -tip v4 24/27] bpf: error-inject: kprobes: Clear current_kprobe and enable preempt in kprobe Masami Hiramatsu
2018-05-28  7:11   ` Masami Hiramatsu
2018-05-28  7:12 ` [PATCH -tip v4 25/27] x86: kprobes: Do not disable preempt on int3 path Masami Hiramatsu
2018-05-28  7:12   ` Masami Hiramatsu
2018-05-28  7:12 ` [PATCH -tip v4 26/27] Documentation: kprobes: Add how to change the execution path Masami Hiramatsu
2018-05-28  7:12   ` Masami Hiramatsu
2018-05-28  7:13 ` [PATCH -tip v4 27/27] kprobes: Remove jprobe stub API Masami Hiramatsu
2018-05-28  7:13   ` Masami Hiramatsu
2018-05-30  9:01 ` [PATCH -tip v4 00/27] kprobes: Cleanup jprobe implementation Masami Hiramatsu
2018-05-30  9:01   ` Masami Hiramatsu
2018-05-31 10:43   ` Naveen N. Rao
2018-05-31 10:43     ` Naveen N. Rao

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