Re: [PATCH v7 3/4] elf: Add a test for PT_LOAD segments with p_align == 1 [BZ #28688]

["H.J. Lu" <hjl.tools@gmail.com>]

On Tue, Jan 18, 2022 at 8:32 AM Adhemerval Zanella
<adhemerval.zanella@linaro.org> wrote:
>
>
>
> On 03/01/2022 20:04, H.J. Lu wrote:
> > Add tst-p_alignmod2-edit to edit the copy of tst-alignmod3.so to set
> > p_align of the first PT_LOAD segment to 1 and verify that the shared
> > library can be loaded normally.
> > ---
> >  elf/Makefile               | 13 +++++++++++++
> >  elf/tst-p_align2.c         | 27 +++++++++++++++++++++++++++
> >  elf/tst-p_alignmod2-edit.c | 27 +++++++++++++++++++++++++++
> >  3 files changed, 67 insertions(+)
> >  create mode 100644 elf/tst-p_align2.c
> >  create mode 100644 elf/tst-p_alignmod2-edit.c
> >
> > diff --git a/elf/Makefile b/elf/Makefile
> > index 9c831faac1..e4be3fa518 100644
> > --- a/elf/Makefile
> > +++ b/elf/Makefile
> > @@ -406,7 +406,9 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
> >  ifeq (yes,$(build-shared))
> >  tests += \
> >    tst-p_alignmod1-edit \
> > +  tst-p_alignmod2-edit \
> >    tst-p_align1 \
> > +  tst-p_align2 \
> >
>
> Maybe add a #test as final member?

Fixed.

> >  endif
> >
> > @@ -2097,3 +2099,14 @@ $(objpfx)tst-p_alignmod1.so: $(objpfx)tst-p_alignmod1-edit \
> >       cp $(objpfx)tst-alignmod3.so $@
> >       $(test-wrapper-env) $(run-program-env) $(rtld-prefix) \
> >         $(objpfx)tst-p_alignmod1-edit $@
> > +
> > +$(objpfx)tst-p_align2: $(objpfx)tst-p_alignmod2.so
> > +
> > +# Make a copy of tst-alignmod3.so and update p_align of the first PT_LOAD
> > +# segment.
> > +$(objpfx)tst-p_alignmod2.so: $(objpfx)tst-p_alignmod2-edit \
> > +                          $(objpfx)tst-alignmod3.so
>
> Same as previous patch, it uses tst-alignmod3.so which only defined in next one.

Fixed.

> > +     rm -f $@
> > +     cp $(objpfx)tst-alignmod3.so $@
> > +     $(test-wrapper-env) $(run-program-env) $(rtld-prefix) \
> > +       $(objpfx)tst-p_alignmod2-edit $@
> > diff --git a/elf/tst-p_align2.c b/elf/tst-p_align2.c
> > new file mode 100644
> > index 0000000000..cab9793220
> > --- /dev/null
> > +++ b/elf/tst-p_align2.c
> > @@ -0,0 +1,27 @@
> > +/* Check different alignments of PT_LOAD segments in a shared library.
> > +   Copyright (C) 2021 Free Software Foundation, Inc.
>
> Update the Copyright year.

Fixed.

> > +   This file is part of the GNU C Library.
> > +
> > +   The GNU C Library is free software; you can redistribute it and/or
> > +   modify it under the terms of the GNU Lesser General Public
> > +   License as published by the Free Software Foundation; either
> > +   version 2.1 of the License, or (at your option) any later version.
> > +
> > +   The GNU C Library is distributed in the hope that it will be useful,
> > +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> > +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> > +   Lesser General Public License for more details.
> > +
> > +   You should have received a copy of the GNU Lesser General Public
> > +   License along with the GNU C Library; if not, see
> > +   <https://www.gnu.org/licenses/>.  */
> > +
> > +extern int do_load_test (void);
> > +
> > +static int
> > +do_test (void)
> > +{
> > +  return do_load_test ();
> > +}
> > +
> > +#include <support/test-driver.c>
> > diff --git a/elf/tst-p_alignmod2-edit.c b/elf/tst-p_alignmod2-edit.c
> > new file mode 100644
> > index 0000000000..2f47b37c9e
> > --- /dev/null
> > +++ b/elf/tst-p_alignmod2-edit.c
> > @@ -0,0 +1,27 @@
> > +/* Set p_align of the first PT_LOAD segment to 1.
> > +   Copyright (C) 2021 Free Software Foundation, Inc.
> > +   This file is part of the GNU C Library.
> > +
> > +   The GNU C Library is free software; you can redistribute it and/or
> > +   modify it under the terms of the GNU Lesser General Public
> > +   License as published by the Free Software Foundation; either
> > +   version 2.1 of the License, or (at your option) any later version.
> > +
> > +   The GNU C Library is distributed in the hope that it will be useful,
> > +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> > +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> > +   Lesser General Public License for more details.
> > +
> > +   You should have received a copy of the GNU Lesser General Public
> > +   License along with the GNU C Library; if not, see
> > +   <https://www.gnu.org/licenses/>.  */
> > +
> > +#include "tst-elf-edit.h"
> > +
> > +/* Set p_align to 1.  */
> > +
> > +static size_t
> > +update_p_align (size_t p_align __attribute__ ((unused)))
> > +{
> > +  return 1;
> > +}

Thanks.

-- 
H.J.