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From: "dave.anglin at bell dot net" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug libc/28857] FAIL: elf/tst-audit24a
Date: Thu, 03 Feb 2022 20:49:35 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28857

--- Comment #2 from dave.anglin at bell dot net ---
Is it DL_FIXUP_ADDR_VALUE that's problematic?=C2=A0 Maybe it should be defi=
ned to
_dl_lookup_address()?

On 32-bit hppa, a pointer to a function descriptor has the plabel bit set (=
bit
30).=C2=A0 This must be cleared to
get the actual address of the descriptor ((unsigned int)addr & ~2).=C2=A0 I=
f the
descriptor has been bound,
the first word of the descriptor is the physical address of the function.=
=C2=A0 If
it hasn't been bound, the first
word of the descriptor points to a trampoline in the PLT.=C2=A0 It will fix=
up the
descriptor on the first call to
the function.

_dl_lookup_address() in dl-fptr.c resolves the descriptor and returns the
actual function address.

If that's not required, maybe DL_FIXUP_ADDR_VALUE(addr) should be:
#define DL_FIXUP_ADDR_VALUE(addr) (*(struct fdesc *) ((unsigned int)addr & =
~2))
DL_FIXUP_BINDNOW_RELOC looks questionable as well.

--=20
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