[Bug libc/19415] dladdr returns wrong names on hppa

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https://sourceware.org/bugzilla/show_bug.cgi?id=19415

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=48025aa9ed3b9a5f5f3b1310eec79b66fb645c17

commit 48025aa9ed3b9a5f5f3b1310eec79b66fb645c17
Author: John David Anglin <dave.anglin@bell.net>
Date:   Sat Jan 2 09:48:18 2016 -0500

    hppa: fix dladdr [BZ #19415]

    The attached patch fixes dladdr on hppa.

    Instead of using the generic version of _dl_lookup_address, we use an
    implementation more or less modeled after
__canonicalize_funcptr_for_compare()
    in gcc.  The function pointer is analyzed and if it points to the
    trampoline used to call _dl_runtime_resolve just before the global
    offset table, then we call _dl_fixup to resolve the function pointer.
    Then, we return the instruction pointer from the first word of the
    descriptor.

    The change fixes the testcase provided in [BZ #19415] and the Debian
    nss package now builds successfully.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                   |    9 ++++++
 sysdeps/hppa/dl-fptr.c      |   59 ++++++++++++++++++++++++++++++++----------
 sysdeps/hppa/dl-lookupcfg.h |    4 +--
 3 files changed, 55 insertions(+), 17 deletions(-)

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