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Re: [Xen-devel] [PATCH v1 7/7] tools: add userspace linker table sandbox
- To: Kees Cook <keescook@xxxxxxxxxxxx>, Josh Poimboeuf <jpoimboe@xxxxxxxxxx>, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
- From: "Luis R. Rodriguez" <mcgrof@xxxxxxxxxx>
- Date: Tue, 23 Aug 2016 02:07:39 +0200
- Cc: "gnomes@xxxxxxxxxxxxxxxxxxx" <gnomes@xxxxxxxxxxxxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, Jiri Kosina <jkosina@xxxxxxx>, "benh@xxxxxxxxxxxxxxxxxxx" <benh@xxxxxxxxxxxxxxxxxxx>, Ming Lei <ming.lei@xxxxxxxxxxxxx>, Heiko Carstens <heiko.carstens@xxxxxxxxxx>, platform-driver-x86@xxxxxxxxxxxxxxx, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>, Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>, linux-arch <linux-arch@xxxxxxxxxxxxxxx>, markus.heiser@xxxxxxxxxxx, sparclinux <sparclinux@xxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>, linux-sh <linux-sh@xxxxxxxxxxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, 조경민 <korea.drzix@xxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, anil.s.keshavamurthy@xxxxxxxxx, fontana@xxxxxxxxxxxxxxx, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "linux-arm-kernel@xxxxxxxxxxxxxxxxxxx" <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, dvhart@xxxxxxxxxxxxx, David Vrabel <david.vrabel@xxxxxxxxxx>, linux-xtensa@xxxxxxxxxxxxxxxx, pali.rohar@xxxxxxxxx, Arnd Bergmann <arnd@xxxxxxxx>, Miao Steven <realmz6@xxxxxxxxx>, Jani Nikula <jani.nikula@xxxxxxxxx>, Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, jbaron@xxxxxxxxxx, ananth@xxxxxxxxxxxxxxxxxx, Borislav Petkov <bp@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>, Michael Brown <mcb30@xxxxxxxx>, linux-kbuild <linux-kbuild@xxxxxxxxxxxxxxx>, Alan Cox <alan@xxxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Chris Zankel <chris@xxxxxxxxxx>, Paul Bolle <pebolle@xxxxxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, "ananth@xxxxxxxxxx" <ananth@xxxxxxxxxx>, Max Filippov <jcmvbkbc@xxxxxxxxx>, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxxxxxx>, Andi Kleen <ak@xxxxxxxxxxxxxxx>, "Luis R. Rodriguez" <mcgrof@xxxxxxxxxx>, Michal Marek <mmarek@xxxxxxxx>, Mark Salter <msalter@xxxxxxxxxx>, mhiramat@xxxxxxxxxx, jolsa@xxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, David Woodhouse <dwmw2@xxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>
- Delivery-date: Tue, 23 Aug 2016 00:07:54 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On Fri, Aug 19, 2016 at 03:31:47PM -0700, Kees Cook wrote:
> On Fri, Aug 19, 2016 at 2:41 PM, <mcgrof@xxxxxxxxxx> wrote:
> > From: "Luis R. Rodriguez" <mcgrof@xxxxxxxxxx>
> >
> > Add a userspace sandbox to allow easy experimentation and
> > test extensions with linker tables, section ranges and the
> > new section core definitions.
> >
> > The userspace sandbox tries to mimic the Linux kernel development
> > flow as much as possible, it however relies on and uses libc. Support
> > is currently only provided to x86_64.
> >
> > v4: this patch is new in this series -- added to the kenrel as
> > suggested by Boris, as otherwise it'd be really hard to keep
> > an external userspace repository in sync.
> >
> > Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxxxx>
> > ---
> > Documentation/sections/linker-tables.rst | 4 +-
> > MAINTAINERS | 1 +
> > include/linux/tables.h | 5 +-
> > tools/Makefile | 3 +-
> > .../arch/x86/include/generated/asm/section-core.h | 1 +
> > tools/arch/x86/include/generated/ranges.h | 1 +
> > tools/arch/x86/include/generated/tables.h | 1 +
> > tools/include/asm-generic/ranges.h | 103 ++++
> > tools/include/asm-generic/section-core.h | 341 +++++++++++
> > tools/include/asm-generic/tables.h | 50 ++
>
> Aren't a bunch of these files exact duplicates of the headers in
> include/linux?
Indeed... This a userspace tools/ architecture decision that was made long ago,
so its not up to me, I am just following the strategy devised and picked up.
Refer to 7d7d1bf1d1dabe435ef50efb051724b8664749cb ("perf bench: Copy kernel
files needed to build mem{cpy,set} x86_64 benchmarks") for an example of
previous similar work. By sharing header files this enable more tools/
to be hacked on.
Luis
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