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From: "n2knqf5ogu at bsogq dot anonbox.net"
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Subject: [Bug libdw/27805] New: libdwfl: Unable to extract source line
 information for RISC-V binary
Date: Fri, 30 Apr 2021 12:31:12 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27805

            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=3D13416&action=3Ded=
it
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 debuggi=
ng
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 ret=
urn
NULL and error out with DWARF_E_INVALID_OFFSET for this given binary.

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