Messages in this thread | | | Date | Tue, 11 Mar 2014 09:52:39 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v2] x86: Remove compat vdso support |
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On 03/11/2014 09:50 AM, Andy Lutomirski wrote: > Looking forward, would it be reasonable to have an extensible set of > flags that live in the ELF interpreter's headers somewhere that > indicate compatibility hacks that the program in question doesn't > need? There are at least two things I can think of: > > - no_compat_vdso32: indicates an interpreter that can load a modern > non-prelinked vdso > - no_vsyscall64: indicates that the libc will not attempt to call > into the vsyscall page on x86_64. > > I'm sure that there are more. Think PT_GNU_STACK but for more than > just the stack. > > If we do something like this, there should probably be a prctl or > similar that can change some of the flags at runtime, too. >
This comes many years too late for this purpose. Such flags might have a use, but at this point it is rather meaningless, I think.
-hpa
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