From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753534AbaKRGdG (ORCPT ); Tue, 18 Nov 2014 01:33:06 -0500 Received: from mail-qc0-f178.google.com ([209.85.216.178]:39798 "EHLO mail-qc0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752060AbaKRGdA (ORCPT ); Tue, 18 Nov 2014 01:33:00 -0500 From: David Long To: linux-arm-kernel@lists.infradead.org, Russell King Cc: Sandeepa Prabhu , William Cohen , Catalin Marinas , Will Deacon , "Jon Medhurst (Tixy)" , Masami Hiramatsu , Ananth N Mavinakayanahalli , Anil S Keshavamurthy , , linux-kernel@vger.kernel.org Subject: [PATCH v3 0/5] ARM64: Add kernel probes(Kprobes) support Date: Tue, 18 Nov 2014 01:32:50 -0500 Message-Id: <1416292375-29560-1-git-send-email-dave.long@linaro.org> X-Mailer: git-send-email 1.8.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "David A. Long" This patchset is heavily based on Sandeepa Prabhu's ARM v8 kprobes patches, first seen in October 2013. This version attempts to address concerns raised by reviewers and also fixes problems discovered during testing, particularly during SMP testing. This patchset adds support for kernel probes(kprobes), jump probes(jprobes) and return probes(kretprobes) support for ARM64. Kprobes mechanism makes use of software breakpoint and single stepping support available in the ARM v8 kernel. Changes since v2 include: 1) Removal of NOP padding in kprobe XOL slots. Slots are now exactly one instruction long. 2) Disabling of interrupts during execution in single-step mode. 3) Fixing of numerous problems in instruction simulation code. 4) Support for the HAVE_REGS_AND_STACK_ACCESS_API feature is added, to allow access to kprobes through debugfs. 5) kprobes is *not* enabled in defconfig. 6) Numerous complaints from checkpatch have been cleaned up, although a couple remain as removing the function pointer typedefs results in ugly code. David A. Long (1): arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature Sandeepa Prabhu (4): arm64: Kprobes with single stepping support arm64: Kprobes instruction simulation support arm64: Add kernel return probes support(kretprobes) kprobes: Add arm64 case in kprobe example module arch/arm64/Kconfig | 3 + arch/arm64/include/asm/kprobes.h | 61 +++ arch/arm64/include/asm/probes.h | 50 +++ arch/arm64/include/asm/ptrace.h | 32 +- arch/arm64/include/uapi/asm/ptrace.h | 36 ++ arch/arm64/kernel/Makefile | 3 + arch/arm64/kernel/kprobes-arm64.c | 313 ++++++++++++++ arch/arm64/kernel/kprobes-arm64.h | 30 ++ arch/arm64/kernel/kprobes.c | 702 +++++++++++++++++++++++++++++++ arch/arm64/kernel/kprobes.h | 30 ++ arch/arm64/kernel/probes-condn-check.c | 122 ++++++ arch/arm64/kernel/probes-decode.h | 110 +++++ arch/arm64/kernel/probes-simulate-insn.c | 174 ++++++++ arch/arm64/kernel/probes-simulate-insn.h | 33 ++ arch/arm64/kernel/ptrace.c | 119 ++++++ arch/arm64/kernel/vmlinux.lds.S | 1 + samples/kprobes/kprobe_example.c | 8 + 17 files changed, 1826 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/include/asm/kprobes.h create mode 100644 arch/arm64/include/asm/probes.h create mode 100644 arch/arm64/kernel/kprobes-arm64.c create mode 100644 arch/arm64/kernel/kprobes-arm64.h create mode 100644 arch/arm64/kernel/kprobes.c create mode 100644 arch/arm64/kernel/kprobes.h create mode 100644 arch/arm64/kernel/probes-condn-check.c create mode 100644 arch/arm64/kernel/probes-decode.h create mode 100644 arch/arm64/kernel/probes-simulate-insn.c create mode 100644 arch/arm64/kernel/probes-simulate-insn.h -- 1.8.1.2