On Mon, May 29, 2017 at 8:14 AM, Yuri Gribov <tetra2...@gmail.com> wrote: > Hi all, > > As discussed in > https://sourceware.org/ml/libc-alpha/2017-01/msg00455.html , some > libdl functions rely on return address to figure out the calling > DSO and then use this information in computation (e.g. output of dlsym > depends on which library called it). > > As reported in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66826 this > may break under tailcall optimization i.e. in cases like > > return dlsym(...); > > Carlos confirmed that they would prefer to have GCC attribute to > prevent tailcalls > (https://sourceware.org/ml/libc-alpha/2017-01/msg00502.html) so there > you go. > > This was bootstrapped on x86_64. Given that this is a minor addition, > I only ran newly added regtests. I hope that's enough (full testsuite > would take a week on my notebook...).
Added docs, per Alex's suggestion. -Y
0001-Added-no_tail_call-attribute.patch
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