Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756899Ab3HFVrg (ORCPT ); Tue, 6 Aug 2013 17:47:36 -0400 Received: from terminus.zytor.com ([198.137.202.10]:43520 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756735Ab3HFVoG (ORCPT ); Tue, 6 Aug 2013 17:44:06 -0400 Date: Tue, 6 Aug 2013 14:43:42 -0700 From: tip-bot for Andi Kleen Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, davem@davemloft.net, anil.s.keshavamurthy@intel.com, ananth@in.ibm.com, masami.hiramatsu.pt@hitachi.com, ak@linux.intel.com, tglx@linutronix.de, hpa@linux.intel.com Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, anil.s.keshavamurthy@intel.com, davem@davemloft.net, ananth@in.ibm.com, masami.hiramatsu.pt@hitachi.com, ak@linux.intel.com, tglx@linutronix.de, hpa@linux.intel.com In-Reply-To: <1375740170-7446-8-git-send-email-andi@firstfloor.org> References: <1375740170-7446-8-git-send-email-andi@firstfloor.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/asmlinkage] x86, asmlinkage: Make kprobes code visible and fix assembler code Git-Commit-ID: 04bb591ca74fb8ea06d5ab7fadfb7bf5b11fb28e X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (terminus.zytor.com [127.0.0.1]); Tue, 06 Aug 2013 14:43:49 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3919 Lines: 96 Commit-ID: 04bb591ca74fb8ea06d5ab7fadfb7bf5b11fb28e Gitweb: http://git.kernel.org/tip/04bb591ca74fb8ea06d5ab7fadfb7bf5b11fb28e Author: Andi Kleen AuthorDate: Mon, 5 Aug 2013 15:02:41 -0700 Committer: H. Peter Anvin CommitDate: Tue, 6 Aug 2013 14:19:48 -0700 x86, asmlinkage: Make kprobes code visible and fix assembler code - Make all the external assembler template symbols __visible - Move the templates inline assembler code into a top level assembler statement, not inside a function. This avoids it being optimized away or cloned. Cc: Ananth N Mavinakayanahalli Cc: Anil S Keshavamurthy Cc: "David S. Miller" Cc: Masami Hiramatsu Signed-off-by: Andi Kleen Link: http://lkml.kernel.org/r/1375740170-7446-8-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin --- arch/x86/include/asm/kprobes.h | 10 +++++----- arch/x86/kernel/kprobes/core.c | 2 +- arch/x86/kernel/kprobes/opt.c | 5 +---- 3 files changed, 7 insertions(+), 10 deletions(-) diff --git a/arch/x86/include/asm/kprobes.h b/arch/x86/include/asm/kprobes.h index 5a6d287..9454c16 100644 --- a/arch/x86/include/asm/kprobes.h +++ b/arch/x86/include/asm/kprobes.h @@ -49,10 +49,10 @@ typedef u8 kprobe_opcode_t; #define flush_insn_slot(p) do { } while (0) /* optinsn template addresses */ -extern kprobe_opcode_t optprobe_template_entry; -extern kprobe_opcode_t optprobe_template_val; -extern kprobe_opcode_t optprobe_template_call; -extern kprobe_opcode_t optprobe_template_end; +extern __visible kprobe_opcode_t optprobe_template_entry; +extern __visible kprobe_opcode_t optprobe_template_val; +extern __visible kprobe_opcode_t optprobe_template_call; +extern __visible kprobe_opcode_t optprobe_template_end; #define MAX_OPTIMIZED_LENGTH (MAX_INSN_SIZE + RELATIVE_ADDR_SIZE) #define MAX_OPTINSN_SIZE \ (((unsigned long)&optprobe_template_end - \ @@ -62,7 +62,7 @@ extern kprobe_opcode_t optprobe_template_end; extern const int kretprobe_blacklist_size; void arch_remove_kprobe(struct kprobe *p); -void kretprobe_trampoline(void); +asmlinkage void kretprobe_trampoline(void); /* Architecture specific copy of original instruction*/ struct arch_specific_insn { diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c index 211bce4..048852d 100644 --- a/arch/x86/kernel/kprobes/core.c +++ b/arch/x86/kernel/kprobes/core.c @@ -661,7 +661,7 @@ static void __used __kprobes kretprobe_trampoline_holder(void) /* * Called from kretprobe_trampoline */ -static __used __kprobes void *trampoline_handler(struct pt_regs *regs) +__visible __used __kprobes void *trampoline_handler(struct pt_regs *regs) { struct kretprobe_instance *ri = NULL; struct hlist_head *head, empty_rp; diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c index 76dc6f0..2c1ac28 100644 --- a/arch/x86/kernel/kprobes/opt.c +++ b/arch/x86/kernel/kprobes/opt.c @@ -88,9 +88,7 @@ static void __kprobes synthesize_set_arg1(kprobe_opcode_t *addr, unsigned long v *(unsigned long *)addr = val; } -static void __used __kprobes kprobes_optinsn_template_holder(void) -{ - asm volatile ( +asm ( ".global optprobe_template_entry\n" "optprobe_template_entry:\n" #ifdef CONFIG_X86_64 @@ -129,7 +127,6 @@ static void __used __kprobes kprobes_optinsn_template_holder(void) #endif ".global optprobe_template_end\n" "optprobe_template_end:\n"); -} #define TMPL_MOVE_IDX \ ((long)&optprobe_template_val - (long)&optprobe_template_entry) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/