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[Bug gold/18288] gold does not handle common symbols in shared libraries
From: |
ccoutant at gmail dot com |
Subject: |
[Bug gold/18288] gold does not handle common symbols in shared libraries correctly |
Date: |
Sun, 07 Jun 2015 13:29:43 +0000 |
https://sourceware.org/bugzilla/show_bug.cgi?id=18288
Cary Coutant <ccoutant at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |ASSIGNED
Summary|linker -s output suboptimal |gold does not handle common
| |symbols in shared libraries
| |correctly
--- Comment #20 from Cary Coutant <ccoutant at gmail dot com> ---
The library libopendbx.so has an allocated common symbol:
24: 0000000000203090 1 COMMON GLOBAL DEFAULT 23 __gnu_lto_v1
(This is a marker symbol emitted by GCC during LTO.)
Gold is doing two things wrong here:
(1) It's processing the symbol from the shared library as a normal common
symbol, and trying to allocate a 1-byte common block with alignment of
0x203090. Instead, we should simply treat the symbol as a regular defined
symbol.
(2) In mistakenly taking the symbol's address as a requested alignment, we end
up with some weird address layout because the alignment is not a multiple of
the page size. That results in the unusually large alignment of the .bss
section, and also results in the internal error in set_offset reported in the
more recent comments.
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- [Bug gold/18288] gold does not handle common symbols in shared libraries correctly,
ccoutant at gmail dot com <=
- [Bug gold/18288] gold does not handle common symbols in shared libraries correctly, ccoutant at gmail dot com, 2015/06/07
- [Bug gold/18288] gold does not handle common symbols in shared libraries correctly, cvs-commit at gcc dot gnu.org, 2015/06/07
- [Bug gold/18288] gold does not handle common symbols in shared libraries correctly, ccoutant at gmail dot com, 2015/06/07
- [Bug gold/18288] gold does not handle common symbols in shared libraries correctly, dilyan.palauzov at aegee dot org, 2015/06/07
- [Bug gold/18288] gold does not handle common symbols in shared libraries correctly, dilyan.palauzov at aegee dot org, 2015/06/08