From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta7.messagelabs.com (mail6.bemta7.messagelabs.com [216.82.255.55]) by kanga.kvack.org (Postfix) with ESMTP id 3D7286B006C for ; Fri, 18 Nov 2011 06:33:59 -0500 (EST) Received: from /spool/local by e28smtp08.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 18 Nov 2011 17:03:49 +0530 Received: from d28av01.in.ibm.com (d28av01.in.ibm.com [9.184.220.63]) by d28relay01.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id pAIBXjKN4501514 for ; Fri, 18 Nov 2011 17:03:45 +0530 Received: from d28av01.in.ibm.com (loopback [127.0.0.1]) by d28av01.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id pAIBXiVa024019 for ; Fri, 18 Nov 2011 17:03:45 +0530 From: Srikar Dronamraju Date: Fri, 18 Nov 2011 16:37:43 +0530 Message-Id: <20111118110743.10512.50949.sendpatchset@srdronam.in.ibm.com> In-Reply-To: <20111118110631.10512.73274.sendpatchset@srdronam.in.ibm.com> References: <20111118110631.10512.73274.sendpatchset@srdronam.in.ibm.com> Subject: [PATCH v7 3.2-rc2 6/30] uprobes: define fixups. Sender: owner-linux-mm@kvack.org List-ID: To: Peter Zijlstra , Linus Torvalds Cc: Oleg Nesterov , Andrew Morton , LKML , Linux-mm , Ingo Molnar , Andi Kleen , Christoph Hellwig , Steven Rostedt , Roland McGrath , Thomas Gleixner , Masami Hiramatsu , Arnaldo Carvalho de Melo , Anton Arapov , Ananth N Mavinakayanahalli , Jim Keniston , Stephen Wilson 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 fa2b663..dd308fa 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]; }; -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org