Messages in this thread | | | Date | Fri, 18 Oct 2002 20:21:22 +0200 | From | Manfred Spraul <> | Subject | Re: [RFC][PATCH] linux-2.5.34_vsyscall_A0 |
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On Fri, 2002-10-18 at 04:14, Andrea Arcangeli wrote: > the main reason it wasn't backported to i386 is that if glibc start > using the vgettimeofday instead of sys_gettimeofday, you won't be able > to downgrade kernel anymore to say 2.4 (oh yeah, I would then backport > it to my tree or Marcelo could apply the patches too to 2.4 but then 2.2 > would be left uncovered, new glibc would segfault on the old kernels).
Does that problem actually exist?
http://marc.theaimsgroup.com/?l=linux-kernel&m=103253890431473&w=2
Jakub Jelinek <jakub@redhat.com> wrote on 2002-09-20 16:15:25
> glibc supports .note.ABI-tag notes for libraries, so there is no problem > with having NPTL libpthread.so.0 --enable-kernel=2.5.36 in say > /lib/i686/libpthread.so.0 and linuxthreads --enable-kernel=2.2.1 in > /lib/libpthread.so.0. The dynamic linker will then choose based > on currently running kernel. > (well, ATM because of libc tsd DL_ERROR --without-tls ld.so cannot be used > with --with-tls libs and vice versa, but that is beeing worked on). >
It should be possible to have one library that supports both syscall interfaces for gettimeofday().
-- Manfred
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