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Message-Id: <20110314133550.27435.62287.sendpatchset@localhost6.localdomain6>
Date: Mon, 14 Mar 2011 19:05:50 +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>,
Christoph Hellwig <hch@...radead.org>,
Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
Ananth N Mavinakayanahalli <ananth@...ibm.com>,
Oleg Nesterov <oleg@...hat.com>,
LKML <linux-kernel@...r.kernel.org>,
SystemTap <systemtap@...rces.redhat.com>,
Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
Roland McGrath <roland@...k.frob.com>,
Andi Kleen <andi@...stfloor.org>,
Andrew Morton <akpm@...ux-foundation.org>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH v2 2.6.38-rc8-tip 9/20] 9: x86: architecture specific task information.
On X86_64, we need to support rip relative instructions.
Rip relative instructions are handled by saving the scratch register
on probe hit and then retrieving the previously saved scratch register
after single-step. This value stored at probe hit is specific to each
task. Hence this is implemented as part of uprobe_task_arch_info.
Since x86_32 has no support for rip relative instructions, we dont need to
bother for x86_32.
Signed-off-by: Jim Keniston <jkenisto@...ux.vnet.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 0063207..e38950f 100644
--- a/arch/x86/include/asm/uprobes.h
+++ b/arch/x86/include/asm/uprobes.h
@@ -34,8 +34,13 @@ 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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