[Bug gas/20803] New: Sparc R_SPARC_32 reloc with miss-align offset.

[chrisj at rtems dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=20803

            Bug ID: 20803
           Summary: Sparc R_SPARC_32 reloc with miss-align offset.
           Product: binutils
           Version: 2.27
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: chrisj at rtems dot org
  Target Milestone: ---

Created attachment 9621
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9621&action=edit
Sparc ASM showing the miss-aligned R_SPARC_32 reloc offset.

I am looking into:

https://devel.rtems.org/ticket/2802 

where a R_SPARC_32 reloc record with a miss-aligned offset results in a crash.
We do not expect a R_SPARC_32 to be miss-aligned.

The source is:

https://git.rtems.org/rtems/tree/testsuites/libtests/dl05/dl-o5.cpp

It seems like emit_expr_fix is being called and it calls TC_CONS_FIX_NEW()
without the sparc_no_align_cons being true so R_SPARC_32 reloc type is selected
in cons_fix_new_sparc.

I do not know if this is an issue in selecting the reloc type, ie
sparc_no_align_cons should be true, or the offset should never be miss-aligned.

I attach a .s source file that shows the issue. It has been edited removing the
.debug output from gcc.

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