linux-kernel - [PATCH v5 3.1.0-rc4-tip 15/26] x86: Define x86_64 specific uprobe_task_arch

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Message-Id: <20110920120305.25326.87267.sendpatchset@srdronam.in.ibm.com>
Date:	Tue, 20 Sep 2011 17:33:05 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Linux-mm <linux-mm@...ck.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jonathan Corbet <corbet@....net>,
	Hugh Dickins <hughd@...gle.com>,
	Christoph Hellwig <hch@...radead.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andi Kleen <andi@...stfloor.org>,
	Oleg Nesterov <oleg@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Roland McGrath <roland@...k.frob.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v5 3.1.0-rc4-tip 15/26]   x86: Define x86_64 specific uprobe_task_arch_info structure


On x86_64, need to handle RIP relative instructions, which requires us to
save and restore a register.

Signed-off-by: Jim Keniston <jkenisto@...ibm.com>
Signed-off-by: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
---
 arch/x86/include/asm/uprobes.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/uprobes.h b/arch/x86/include/asm/uprobes.h
index 7d9d0a5..2ad2c71 100644
--- a/arch/x86/include/asm/uprobes.h
+++ b/arch/x86/include/asm/uprobes.h
@@ -36,8 +36,13 @@ typedef u8 uprobe_opcode_t;
 struct uprobe_arch_info {
 	unsigned long rip_rela_target_address;
 };
+
+struct uprobe_task_arch_info {
+	unsigned long saved_scratch_register;
+};
 #else
 struct uprobe_arch_info {};
+struct uprobe_task_arch_info {};
 #endif
 struct uprobe;
 extern int analyze_insn(struct task_struct *tsk, struct uprobe *uprobe);
--
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