https://bugs.llvm.org/show_bug.cgi?id=40818
Bug ID: 40818
Summary: --compress-debug-sections causes loss of symbols and
invalid relocations
Product: tools
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: llvm-objcopy
Assignee: unassignedb...@nondot.org
Reporter: jh7370.2...@my.bristol.ac.uk
CC: alexander.v.shaposhni...@gmail.com,
jake.h.ehrl...@gmail.com,
jh7370.2...@my.bristol.ac.uk,
llvm-bugs@lists.llvm.org, ruppre...@google.com
It's entirely reasonable to have a relocation targeting a section symbol in the
debug sections. However, I just discovered that if you run
--compress-debug-sections on an ELF containing such a reference, it succeeds,
but the symbols are lost. This can potentially lead to relocations with invalid
or incorrect symbol references.
This bug is blocking me landing https://reviews.llvm.org/D58510, because one of
the tests updated in that change references such a symbol, whereas before it
was (probably unintentionally) not referencing any symbol at all.
I also think it essentially renders --compress-debug-sections useless in any
real case.
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