[Bug binutils/27534] New: [readelf] .debug_addr reference not resolved for split dwarf

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27534

            Bug ID: 27534
           Summary: [readelf] .debug_addr reference not resolved for split
                    dwarf
           Product: binutils
           Version: 2.37 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

Consider this test-case:
...
$ gcc ./src/gdb/testsuite/gdb.dwarf2/fission-multi-cu*.c -gsplit-dwarf
...

With
...
$ ~/binutils/install/bin/readelf -w -P a.out
...
we get:
...
Contents of the .debug_info.dwo section (loaded from
/home/vries/gdb_versions/devel/fission-multi-cu1.dwo):

 <1><18>: Abbrev Number: 2 (DW_TAG_subprogram)
    <19>   DW_AT_name        : (indexed string: 0x2): func
    <20>   DW_AT_low_pc      : (addr_index: 0x0): <no .debug_addr section>
...

The address for func is:
...
$ nm a.out | grep func
0000000000400497 T func
...
which matches this entry in the .debug_addr table in a.out:
...
Contents of the .debug_addr section (loaded from a.out):

  For compilation unit at offset 0xc7:
        Index   Address
        0:      0000000000400497
...

So, we could actually print:
...
    <20>   DW_AT_low_pc      : (addr_index: 0x0): 0x00400497
...

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