Messages in this thread | | | Subject | Re: [GIT PULL] s390 updates for 2.6.28-rc1 | From | Martin Schwidefsky <> | Date | Sun, 26 Oct 2008 19:26:33 +0100 |
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On Fri, 2008-10-24 at 13:37 +0200, Ingo Molnar wrote: > * Heiko Carstens <heiko.carstens@de.ibm.com> wrote: > > > The s390 vdso preparation patch "arch_setup_additional_pages argument" > > touches other architectures (x86, sh and powerpc): > > > > arch_setup_additional_pages currently gets two arguments, the binary > > format descripton and an indication if the process uses an executable > > stack or not. The second argument is not used by anybody, it could be > > removed without replacement. > > hm, this is the first time i've seen this change,
The code is relatively new and I planned it for the merge window for 2.6.29. I still have to nag our performance team to do some tests with it.
> and it looks a bit weird: > > --- a/arch/x86/include/asm/elf.h > +++ b/arch/x86/include/asm/elf.h > @@ -325,7 +325,7 @@ struct linux_binprm; > > #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 > extern int arch_setup_additional_pages(struct linux_binprm *bprm, > - int executable_stack); > + int uses_interp); > > why didnt you just add a new uses_interp argument?
I could have but I noticed at the same time that executable_stack is unused. If somebody finds a need for the executable_stack argument it can easily re-added but I can't think of a use for it. Ergo I removed it.
> executable_stack is passed in to potentially enable architectures to be > aware of how conservative/legacy the address-space of the binary is - > whether to randomize the vdso, etc. exec-shield used to take advantage > of that.
What has address space layout / randomization to do with executable_stack? You lost me there.
> But there seems to be no in-tree use of that (and if one arises it can > just add back that parameter), and i dont want to stand in the way of > your pull request either, so for the x86 bits: > > Acked-by: Ingo Molnar <mingo@elte.hu>
Thanks. I'll add it.
-- blue skies, Martin.
"Reality continues to ruin my life." - Calvin.
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