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From: "sourceware at rahix dot de" <sourceware-bugzilla@sourceware.org>
To: libabigail@sourceware.org
Subject: [Bug default/26146] New: No type information for ARM thumb object
 files
Date: Sun, 21 Jun 2020 11:36:24 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26146

            Bug ID: 26146
           Summary: No type information for ARM thumb object files
           Product: libabigail
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: default
          Assignee: dodji at redhat dot com
          Reporter: sourceware at rahix dot de
                CC: libabigail at sourceware dot org
  Target Milestone: ---

Created attachment 12630
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D12630&action=3Ded=
it
ARM thumb object file for reproduction

It looks like libabigail fails to extract type information from ARM thumb
object files.

Compiling a test file using 'arm-none-eabi-gcc -g' produces an object file
that libabigail can extract type information from, but 'arm-none-eabi-gcc
-g -mthumb' does not.  The object file does contain debug symbols as I can
see with `eu-readelf --debug-dump=3Dinfo`.

Using `abidw` I just get this:

    <abi-corpus path=3D'thumb.o' architecture=3D'elf-arm'>
      <elf-function-symbols>
        <!-- func_a -->
        <elf-symbol name=3D'func_a' type=3D'func-type' binding=3D'global-bi=
nding'
visibility=3D'default-visibility' is-defined=3D'yes'/>
        <!-- func_b -->
        <elf-symbol name=3D'func_b' type=3D'func-type' binding=3D'global-bi=
nding'
visibility=3D'default-visibility' is-defined=3D'yes'/>
      </elf-function-symbols>
    </abi-corpus>

The source for the test file was:

    int func_a(char *buf, unsigned char len)
    {
            return -1;
    }

    char *func_b(char *ptr, void *ptr2)
    {
            return NULL;
    }

I've attached the object file.

Regards,
Rahix

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