From: Roland McGrath <roland@hack.frob.com>
To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>,
Linux-mm <linux-mm@kvack.org>,
Arnaldo Carvalho de Melo <acme@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andi Kleen <andi@firstfloor.org>,
Christoph Hellwig <hch@infradead.org>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Oleg Nesterov <oleg@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
SystemTap <systemtap@sources.redhat.com>,
Jim Keniston <jkenisto@linux.vnet.ibm.com>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
LKML <linux-kernel@vger.kernel.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: Re: [PATCH v2 2.6.38-rc8-tip 6/20] 6: x86: analyze instruction and determine fixups.
Date: Fri, 18 Mar 2011 11:36:29 -0700 (PDT) [thread overview]
Message-ID: <20110318183629.2AB052C286@topped-with-meat.com> (raw)
In-Reply-To: Srikar Dronamraju's message of Friday, 18 March 2011 23:54:57 +0530 <20110318182457.GA24048@linux.vnet.ibm.com>
> handle_riprel_insn() returns 0 if the instruction is not rip-relative
> returns 1 if its rip-relative but can use XOL slots.
> returns -1 if its rip-relative but cannot use XOL.
>
> We dont see any instructions that are rip-relative and cannot use XOL.
> so the check and return are redundant and I will remove that in the next
> patch.
How is that? You can only adjust a rip-relative instruction correctly if
the instruction copy is within 2GB of the original target address, which
cannot be presumed to always be the case in user address space layout
(unlike the kernel).
Thanks,
Roland
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next prev parent reply other threads:[~2011-03-18 18:36 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-14 13:34 [PATCH v2 2.6.38-rc8-tip 0/20] 0: Inode based uprobes Srikar Dronamraju
2011-03-14 13:34 ` [PATCH v2 2.6.38-rc8-tip 1/20] 1: mm: Move replace_page() to mm/memory.c Srikar Dronamraju
2011-03-14 14:16 ` Steven Rostedt
2011-03-14 17:02 ` Srikar Dronamraju
2011-03-14 17:13 ` Steven Rostedt
2011-03-14 17:29 ` Srikar Dronamraju
2011-03-14 13:34 ` [PATCH v2 2.6.38-rc8-tip 2/20] 2: X86 specific breakpoint definitions Srikar Dronamraju
2011-03-14 13:34 ` [PATCH v2 2.6.38-rc8-tip 3/20] 3: uprobes: Breakground page replacement Srikar Dronamraju
2011-03-14 15:29 ` Steven Rostedt
2011-03-14 15:38 ` Steven Rostedt
2011-03-14 17:24 ` Srikar Dronamraju
2011-03-14 18:21 ` Steven Rostedt
2011-03-14 18:22 ` Steven Rostedt
2011-03-14 16:58 ` Stephen Wilson
2011-03-14 17:30 ` Srikar Dronamraju
2011-03-15 13:22 ` Thomas Gleixner
2011-03-15 17:51 ` Srikar Dronamraju
2011-03-15 18:03 ` Thomas Gleixner
2011-03-15 18:07 ` Srikar Dronamraju
2011-03-14 13:34 ` [PATCH v2 2.6.38-rc8-tip 4/20] 4: uprobes: Adding and remove a uprobe in a rb tree Srikar Dronamraju
2011-03-15 13:38 ` Thomas Gleixner
2011-03-15 13:43 ` Steven Rostedt
2011-03-15 17:30 ` Srikar Dronamraju
2011-03-15 19:22 ` Thomas Gleixner
2011-03-15 19:48 ` Peter Zijlstra
2011-03-15 22:42 ` Eric Dumazet
2011-03-16 7:54 ` Peter Zijlstra
2011-03-14 13:34 ` [PATCH v2 2.6.38-rc8-tip 5/20] 5: Uprobes: register/unregister probes Srikar Dronamraju
2011-03-14 16:00 ` Steven Rostedt
2011-03-14 17:32 ` Srikar Dronamraju
2011-03-15 14:28 ` Thomas Gleixner
2011-03-15 17:15 ` Srikar Dronamraju
2011-03-15 17:47 ` Steven Rostedt
2011-03-15 17:50 ` Peter Zijlstra
2011-03-15 18:04 ` Srikar Dronamraju
2011-03-15 18:15 ` Peter Zijlstra
2011-03-18 18:53 ` Srikar Dronamraju
2011-03-15 18:15 ` Thomas Gleixner
2011-03-14 13:35 ` [PATCH v2 2.6.38-rc8-tip 6/20] 6: x86: analyze instruction and determine fixups Srikar Dronamraju
2011-03-15 14:36 ` Thomas Gleixner
2011-03-18 18:24 ` Srikar Dronamraju
2011-03-18 18:36 ` Roland McGrath [this message]
2011-03-18 18:49 ` Srikar Dronamraju
2011-03-18 19:07 ` Srikar Dronamraju
2011-03-18 19:10 ` Roland McGrath
2011-03-14 13:35 ` [PATCH v2 2.6.38-rc8-tip 7/20] 7: uprobes: store/restore original instruction Srikar Dronamraju
2011-03-14 18:09 ` Stephen Wilson
2011-03-15 9:22 ` Srikar Dronamraju
2011-03-15 13:47 ` Steven Rostedt
2011-03-15 16:15 ` Stephen Wilson
2011-03-15 16:17 ` Srikar Dronamraju
2011-03-15 16:21 ` Steven Rostedt
2011-03-15 17:57 ` Peter Zijlstra
2011-03-15 18:58 ` Balbir Singh
2011-03-15 19:30 ` Peter Zijlstra
2011-03-15 19:32 ` Steven Rostedt
2011-03-16 5:51 ` Balbir Singh
2011-03-16 17:40 ` Steven Rostedt
2011-03-15 14:41 ` Thomas Gleixner
2011-03-15 16:25 ` Srikar Dronamraju
2011-03-14 13:35 ` [PATCH v2 2.6.38-rc8-tip 8/20] 8: uprobes: mmap and fork hooks Srikar Dronamraju
2011-03-14 13:35 ` [PATCH v2 2.6.38-rc8-tip 9/20] 9: x86: architecture specific task information Srikar Dronamraju
2011-03-14 13:36 ` [PATCH v2 2.6.38-rc8-tip 10/20] 10: uprobes: task specific information Srikar Dronamraju
2011-03-14 13:36 ` [PATCH v2 2.6.38-rc8-tip 11/20] 11: uprobes: slot allocation for uprobes Srikar Dronamraju
2011-03-15 19:10 ` Jonathan Corbet
2011-03-16 4:58 ` Srikar Dronamraju
2011-03-15 20:31 ` Stephen Wilson
2011-03-16 4:50 ` Srikar Dronamraju
2011-03-14 13:36 ` [PATCH v2 2.6.38-rc8-tip 12/20] 12: uprobes: get the breakpoint address Srikar Dronamraju
2011-03-14 13:36 ` [PATCH v2 2.6.38-rc8-tip 13/20] 13: x86: x86 specific probe handling Srikar Dronamraju
2011-03-14 13:36 ` [PATCH v2 2.6.38-rc8-tip 14/20] 14: uprobes: Handing int3 and singlestep exception Srikar Dronamraju
2011-03-14 13:36 ` [PATCH v2 2.6.38-rc8-tip 15/20] 15: x86: uprobes exception notifier for x86 Srikar Dronamraju
2011-03-14 13:37 ` [PATCH v2 2.6.38-rc8-tip 16/20] 16: uprobes: register a notifier for uprobes Srikar Dronamraju
2011-03-15 19:56 ` Stephen Wilson
2011-03-18 19:28 ` Srikar Dronamraju
2011-03-14 13:37 ` [PATCH v2 2.6.38-rc8-tip 17/20] 17: uprobes: filter chain Srikar Dronamraju
2011-03-15 19:49 ` Stephen Wilson
2011-03-18 19:16 ` Srikar Dronamraju
2011-03-18 22:10 ` Stephen Wilson
2011-03-14 13:37 ` [PATCH v2 2.6.38-rc8-tip 18/20] 18: uprobes: commonly used filters Srikar Dronamraju
2011-03-14 13:37 ` [PATCH v2 2.6.38-rc8-tip 19/20] 19: tracing: Extract out common code for kprobes/uprobes traceevents Srikar Dronamraju
2011-03-14 13:37 ` [PATCH v2 2.6.38-rc8-tip 20/20] 20: tracing: uprobes trace_event interface Srikar Dronamraju
2011-03-14 23:30 ` [PATCH v2 2.6.38-rc8-tip 0/20] 0: Inode based uprobes Andrew Morton
2011-03-14 23:47 ` Andi Kleen
2011-03-15 0:22 ` Thomas Gleixner
2011-03-15 18:06 ` Andi Kleen
2011-03-15 19:43 ` Thomas Gleixner
2011-03-15 20:01 ` Steven Rostedt
2011-03-15 20:09 ` Thomas Gleixner
2011-03-15 20:44 ` Steven Rostedt
2011-03-16 17:32 ` Tom Tromey
2011-03-16 17:44 ` Steven Rostedt
2011-03-16 17:27 ` Tom Tromey
2011-03-15 1:13 ` Frank Ch. Eigler
2011-03-15 1:35 ` Thomas Gleixner
2011-03-15 5:21 ` Srikar Dronamraju
2011-03-15 11:02 ` Thomas Gleixner
2011-03-15 11:37 ` Srikar Dronamraju
2011-03-15 1:57 ` Srikar Dronamraju
2011-03-15 2:52 ` Steven Rostedt
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