ld and R_386_GOTOFF relocs
Peter S. Mazinger
ps.m@gmx.net
Thu May 12 06:29:00 GMT 2005
On Wed, 11 May 2005, H. J. Lu wrote:
> On Thu, May 12, 2005 at 12:48:46AM +0200, Peter S. Mazinger wrote:
> > Hello!
> >
> > I have gotten under peculiar circumstances following:
> > (sysvinit) init.o: relocation R_386_GOTOFF against protected function
> > `main' can not be used when making a shared object
> >
> > libc.so does not provide a weak 'main', main() is in crt1.o defined in asm
> > as '.protected main'.
> >
> > init is built as -pie executable.
> >
> > I think this check is valid if a shared lib is created, but not valid for
> > a PIE executable.
> >
> > I think, that a check info->shared should be changed to
> > info->shared && !info->pie (or !info->executable), to allow pie to be
> > linked, but I can't locate the one needed for this.
> >
> > Thanks, Peter
>
> This is a gcc bug
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19520
Reading through this, I came to the patch you posted on 2005-02-06 for
elf32-i386.c. The comment says:
+2005-02-06 H.J. Lu <hongjiu.lu@intel.com>
+
+ * elf32-i386.c (elf_i386_relocate_section): Disallow R_386_GOTOFF
+ against protected function when building shared library.
If you intented to do this only for shared libraries, but not for PIE
executables, then info->shared is incorrect, and as I proposed has to be
changed.
Peter
--
Peter S. Mazinger <ps dot m at gmx dot net> ID: 0xA5F059F2
Key fingerprint = 92A4 31E1 56BC 3D5A 2D08 BB6E C389 975E A5F0 59F2
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