[llvm-bugs] [Bug 36678] Cannot use a regular plt entry for R_386_PC32 with -pie/-shared

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=36678

Fangrui Song <i at maskray.me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CONFIRMED                   |RESOLVED
                 CC|                            |i at maskray.me
         Resolution|---                         |FIXED

--- Comment #1 from Fangrui Song <i at maskray.me> ---
Fixed by r327542

% ld.lld -shared a.o b.so -o a
ld.lld: error: relocation R_386_PC32 cannot be used against symbol foo;
recompile with -fPIC
>>> defined in b.so
>>> referenced by a.o:(.text+0x1)

% ld.lld -pie a.o b.so -o a
ld.lld: error: symbol 'foo' cannot be preempted; recompile with -fPIE
>>> defined in b.so
>>> referenced by a.o:(.text+0x1)

With -z notext, a text relocation R_386_PC32 is created.

% ld.bfd -m elf_i386 -pie a.o b.so -o a -z text
ld.bfd: a.o: warning: relocation against `foo' in read-only section `.text'
ld.bfd: read-only segment has dynamic relocations.
% ld.bfd -m elf_i386 -shared a.o b.so -o a -z text
ld.bfd: a.o: warning: relocation against `foo' in read-only section `.text'
ld.bfd: read-only segment has dynamic relocations.

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