Messages in this thread | | | Date | Tue, 21 Jan 2014 10:00:03 +0100 | From | Peter Zijlstra <> | Subject | Re: [GIT PULL] x86/kaslr for v3.14 |
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On Mon, Jan 20, 2014 at 03:13:33PM -0800, H. Peter Anvin wrote: > On 01/20/2014 03:12 PM, Linus Torvalds wrote: > > On Mon, Jan 20, 2014 at 2:54 PM, Linus Torvalds > > <torvalds@linux-foundation.org> wrote: > >> So I pulled this, but one question: > > > > .. oh, and since I decided to test it, and was looking for problems: > > enabling kaslr breaks "perf". The *profile* looks fine, but the > > disassembly doesn't work. > > > > I'm not entirely surprised. I decided I wanted to test it for a > > reason, after all. So it's not unexpected, but perhaps people hadn't > > thought about it, and clearly hadn't tested it. > > > > Kernel modules disassemble fine, so clearly perf knows about code that > > moves around, but apparently it gets surprised when the core vmlinux > > file disassembly doesn't match addresses. > > > > So this is presumably something that needs to be fixed in perf?
Where do we learn about the offset from userspace?
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