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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug symtab/29318] [gdb] FAIL: gdb.base/gcore-relro-pie.exp: x/i $pc
Date: Tue, 05 Jul 2022 07:37:21 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29318

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #1)
> (In reply to Tom de Vries from comment #0)
> > That seems to be caused by this alignment mismatch introduced by strip:
> > ...
> > $ readelf -l -W  gcore-relro-pie | grep GNU_ST
> >   GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000
> > 0x000000 RW  0x10
> > $ readelf -l -W  gcore-relro-pie.stripped | grep GNU_ST
> >   GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000
> > 0x000000 RW  0x8
> > ...
> >=20
> > I have not been able to reproduce this outside the specific setup, so t=
he
> > strip problem may be specific to the package.
> >=20
>=20
> I was able to reproduce this with binutils trunk from today, using
> --disable-separate-code, which has an effect here in bfd/elf64-x86-64.c:
> ...
> #if DEFAULT_LD_Z_SEPARATE_CODE
> # define ELF_MAXPAGESIZE                    0x1000
> #else
> # define ELF_MAXPAGESIZE                    0x200000
> #endif
> ...
> which causes elf_is_p_align_valid to behave differently, which is called
> from copy_elf_program_header.

Filed binutils counterpart, PR29319.

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