Re: RFC: adding Linux vsyscall-disable and similar backwards-incompatibility flags to ELF headers?

2015-09-02 Thread Brian Gerst
On Tue, Sep 1, 2015 at 10:21 PM, Andy Lutomirski wrote: > On Sep 1, 2015 6:53 PM, "Brian Gerst" wrote: >> >> On Tue, Sep 1, 2015 at 8:51 PM, Andy Lutomirski wrote: >> > Hi all- >> > >> > Linux has a handful of weird features that are only supp

Re: RFC: adding Linux vsyscall-disable and similar backwards-incompatibility flags to ELF headers?

2015-09-01 Thread Brian Gerst
ain features. > > Ideas? We could add a new phdr for this, but then we'd need to play > linker script games, and I'm not sure that could be done in a clean, > extensible way. The vsyscall page is mapped in the fixmap region, which is shared between all processes. You can't turn it off for an individual process. -- Brian Gerst