Phenomenal:  In 32 bit and 64 bit mixed code,  ld can't do relocation
for 32 bit code.
It is caused by commit 17c6c3b99156fe82c1e637e1a5fd9f163ac788c8.




  /* src_mask selects the part of the instruction (or data) to be used
     in the relocation sum.  If the target relocations don't have an
     addend in the reloc, eg. ELF USE_REL, src_mask will normally equal
     dst_mask to extract the addend from the section contents.  If
     relocations do have an addend in the reloc, eg. ELF USE_RELA, this
     field should normally be zero.  Non-zero values for ELF USE_RELA
     targets should be viewed with suspicion as normally the value in
     the dst_mask part of the section contents should be ignored.  */
  bfd_vma src_mask;



Author: Jan Beulich <jbeulich@suse.com>  2021-05-07 18:05:12
Committer: Jan Beulich <jbeulich@suse.com>  2021-05-07 18:05:12
Parent: 98da05bf2698b55b73453480a3fbb92f163d2c7b (x86: don't mix disp
and imm processing)
Child:  4cf88725da1cb503be04d3237354105ec170bc86 ([gdb/symtab] Fix
infinite recursion in dwarf2_cu::get_builder())
Branches: master, test0558-01 and many more (41)
Follows: gdb-10-branchpoint
Precedes: binutils-2_37, gdb-11-branchpoint

    x86-64/ELF: clear src_mask for all reloc types

    x86-64 uses rela relocations. The comment next to the field's declaration
    says "Non-zero values for ELF USE_RELA targets should be viewed with
    suspicion ..." And indeed the fields being non-zero causes section
    contents to be accumulated into the final relocated values in addition to
    the relocations' addends, which is contrary to the ELF spec.