From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756335Ab1ITMPe (ORCPT ); Tue, 20 Sep 2011 08:15:34 -0400 Received: from e23smtp01.au.ibm.com ([202.81.31.143]:38119 "EHLO e23smtp01.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756045Ab1ITMP3 (ORCPT ); Tue, 20 Sep 2011 08:15:29 -0400 From: Srikar Dronamraju To: Peter Zijlstra , Ingo Molnar Cc: Steven Rostedt , Srikar Dronamraju , Linux-mm , Arnaldo Carvalho de Melo , Linus Torvalds , Ananth N Mavinakayanahalli , Hugh Dickins , Christoph Hellwig , Jonathan Corbet , Thomas Gleixner , Masami Hiramatsu , Oleg Nesterov , Andrew Morton , Jim Keniston , Roland McGrath , Andi Kleen , LKML Date: Tue, 20 Sep 2011 17:31:48 +0530 Message-Id: <20110920120148.25326.96997.sendpatchset@srdronam.in.ibm.com> In-Reply-To: <20110920115938.25326.93059.sendpatchset@srdronam.in.ibm.com> References: <20110920115938.25326.93059.sendpatchset@srdronam.in.ibm.com> Subject: [PATCH v5 3.1.0-rc4-tip 10/26] x86: Set instruction pointer. Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provides x86 specific routine to set the instruction pointer to the given address. Signed-off-by: Jim Keniston Signed-off-by: Srikar Dronamraju --- arch/x86/include/asm/uprobes.h | 1 + arch/x86/kernel/uprobes.c | 10 ++++++++++ 2 files changed, 11 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/uprobes.h b/arch/x86/include/asm/uprobes.h index 4295ce0..35ac9d7 100644 --- a/arch/x86/include/asm/uprobes.h +++ b/arch/x86/include/asm/uprobes.h @@ -39,4 +39,5 @@ struct uprobe_arch_info {}; #endif struct uprobe; extern int analyze_insn(struct task_struct *tsk, struct uprobe *uprobe); +extern void set_instruction_pointer(struct pt_regs *regs, unsigned long vaddr); #endif /* _ASM_UPROBES_H */ diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c index e4fd077..e1c1dfe 100644 --- a/arch/x86/kernel/uprobes.c +++ b/arch/x86/kernel/uprobes.c @@ -383,3 +383,13 @@ int analyze_insn(struct task_struct *tsk, struct uprobe *uprobe) prepare_fixups(uprobe, &insn); return 0; } + +/* + * @reg: reflects the saved state of the task + * @vaddr: the virtual address to jump to. + * Return 0 on success or a -ve number on error. + */ +void set_instruction_pointer(struct pt_regs *regs, unsigned long vaddr) +{ + regs->ip = vaddr; +}