From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756214Ab1ITMOr (ORCPT ); Tue, 20 Sep 2011 08:14:47 -0400 Received: from e28smtp02.in.ibm.com ([122.248.162.2]:45462 "EHLO e28smtp02.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756047Ab1ITMOp (ORCPT ); Tue, 20 Sep 2011 08:14:45 -0400 From: Srikar Dronamraju To: Peter Zijlstra , Ingo Molnar Cc: Steven Rostedt , Srikar Dronamraju , Linux-mm , Arnaldo Carvalho de Melo , Linus Torvalds , Jonathan Corbet , Hugh Dickins , Christoph Hellwig , Masami Hiramatsu , Thomas Gleixner , Ananth N Mavinakayanahalli , Oleg Nesterov , Andrew Morton , Jim Keniston , Roland McGrath , Andi Kleen , LKML Date: Tue, 20 Sep 2011 17:31:07 +0530 Message-Id: <20110920120107.25326.65619.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 6/26] Uprobes: define fixups. Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org During the first insertion of a probepoint, instruction is analyzed for fixups and cached in the per-uprobe struct. On a probehit, the cached fixup is used. Fixup analysis and caching is done in arch-specific code. Signed-off-by: Jim Keniston Signed-off-by: Srikar Dronamraju --- include/linux/uprobes.h | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h index 50a8c67..074c4e9 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -33,6 +33,17 @@ struct vm_area_struct; #define MAX_UINSN_BYTES 4 #endif +#define uprobe_opcode_sz sizeof(uprobe_opcode_t) + +/* Post-execution fixups. Some architectures may define others. */ + +/* No fixup needed */ +#define UPROBES_FIX_NONE 0x0 +/* Adjust IP back to vicinity of actual insn */ +#define UPROBES_FIX_IP 0x1 +/* Adjust the return address of a call insn */ +#define UPROBES_FIX_CALL 0x2 + struct uprobe_consumer { int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs); /* @@ -53,6 +64,7 @@ struct uprobe { struct inode *inode; /* Also hold a ref to inode */ loff_t offset; int copy; + u16 fixups; u8 insn[MAX_UINSN_BYTES]; };