[Bug libdw/27805] New: libdwfl: Unable to extract source line information for RISC-V binary

[n2knqf5ogu at bsogq dot anonbox.net]

https://sourceware.org/bugzilla/show_bug.cgi?id=27805

            Bug ID: 27805
           Summary: libdwfl: Unable to extract source line information for
                    RISC-V binary
           Product: elfutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libdw
          Assignee: unassigned at sourceware dot org
          Reporter: n2knqf5ogu at bsogq dot anonbox.net
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

Created attachment 13416
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13416&action=edit
RV32IMC binary to reproduce the outlined issue

For the attached RV32IMC (i.e. RISC-V) binary, libdwfl from elfutlis 0.183 is
incapable of extracting source line information from provided DWARF debugging
information. This can be easily reproduced by comparing the behavior of
elfutils's addr2line with binutils's addr2line program.

With binutils:

  $ addr2line --version
  GNU addr2line (GNU Binutils) 2.35.2
  $ addr2line -e /tmp/elfutils-srcline-bug.elf 20400058
  /home/john/src/RIOT/examples/hello-world/main.c:26

With elfutils:

  $ addr2line --version
  addr2line (elfutils) 0.183
  $ addr2line -e /tmp/elfutils-srcline-bug.elf 20400058
  ??:0

Briefly debugging this, it seems to me that dwfl_module_getsrc seems to return
NULL and error out with DWARF_E_INVALID_OFFSET for this given binary.

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