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RE: [PATCH, MIPS] Support shared library debug with MIPS PIE
- From: Matthew Fortune <Matthew dot Fortune at imgtec dot com>
- To: Richard Sandiford <rdsandiford at googlemail dot com>, Joseph Myers <joseph at codesourcery dot com>
- Cc: "'binutils at sourceware dot org'" <binutils at sourceware dot org>, "Maciej W. Rozycki (macro at linux-mips dot org)" <macro at linux-mips dot org>
- Date: Thu, 23 Jul 2015 21:47:20 +0000
- Subject: RE: [PATCH, MIPS] Support shared library debug with MIPS PIE
- Authentication-results: sourceware.org; auth=none
- References: <6D39441BF12EF246A7ABCE6654B0235321175C6A at LEMAIL01 dot le dot imgtec dot org> <87381ii9iy dot fsf at googlemail dot com> <6D39441BF12EF246A7ABCE6654B0235321176D73 at LEMAIL01 dot le dot imgtec dot org> <6D39441BF12EF246A7ABCE6654B02353211AFA73 at LEMAIL01 dot le dot imgtec dot org> <alpine dot DEB dot 2 dot 10 dot 1507231653450 dot 26532 at digraph dot polyomino dot org dot uk> <87egjywomn dot fsf at googlemail dot com>
Richard Sandiford <rdsandiford@googlemail.com> writes:
> Joseph Myers <joseph@codesourcery.com> writes:
> > On Fri, 26 Jun 2015, Matthew Fortune wrote:
> >> + dt_addr = (sdyn->output_section->vma + sdyn->output_offset
> >> + + b - sdyn->contents);
> >
> > For the case of n64 target and 32-bit host, this results in
> > sdyn->output_section->vma + sdyn->output_offset (64-bit) being added
> > to b (32-bit host pointer), so losing the high part and resulting in
> > an incorrect DT_MIPS_RLD_MAP_REL tag, and all dynamically linked glibc
> > tests failing for n64.
>
> Ouch.
Apologies for missing this, thanks for fixing.
Matthew