From: Bob Stewart <robjsstewart@gmail.com>
Sent: Wednesday, July 18, 2018 1:55:02 PM
To: users@lists.genode.org
Subject: Re: Linker Issues in base-hw for an Armv8 Implementation

There is actually no error message indication why the linker failed. Assuming that it was because --build-id was expected later in the linker operations, I added the linker option -Wl, --build-id=none to the final image linker command in build_core. That resulted in the linker completing successfully and sensible image sizes being created as shown in the objdump output:

objdump -p ../build/dragonboard/var/run/log.bootstrap |more

../build/dragonboard/var/run/log.bootstrap:     file format elf64-little

Program Header:

    LOAD off    0x0000000000001000 vaddr 0x0000000081000000 paddr 0x0000000081000000 align 2**12

         filesz 0x000000000003b840 memsz 0x000000000003b840 flags r-x

    LOAD off    0x000000000003d000 vaddr 0x000000008103c000 paddr 0x000000008103c000 align 2**12

         filesz 0x00000000000041fc memsz 0x000000000000d109 flags rw-

    LOAD off    0x00000000000411fc vaddr 0x0000000000000000 paddr 0x0000000000000000 align 2**12

         filesz 0x0000000000000000 memsz 0x0000000000000000 flags r--

objdump -h ../build/dragonboard/var/run/log.bootstrap |more

../build/dragonboard/var/run/log.bootstrap:     file format elf64-little

Sections:

Idx Name          Size      VMA               LMA               File off  Algn

  0 .text         0003b840  0000000081000000  0000000081000000  00001000  2**4

                  CONTENTS, ALLOC, LOAD, READONLY, CODE

  1 .data         00000718  000000008103c000  000000008103c000  0003d000  2**3

                  CONTENTS, ALLOC, LOAD, DATA

  2 .got          000000e0  000000008103c718  000000008103c718  0003d718  2**3

                  CONTENTS, ALLOC, LOAD, DATA

  3 .got.plt      00000018  000000008103c7f8  000000008103c7f8  0003d7f8  2**3

                  CONTENTS, ALLOC, LOAD, DATA

  4 .eh_frame     00003084  000000008103c810  000000008103c810  0003d810  2**3

                  CONTENTS, ALLOC, LOAD, READONLY, DATA

  5 .gcc_except_table 00000968  000000008103f894  000000008103f894  00040894  2**2

                  CONTENTS, ALLOC, LOAD, READONLY, DATA

  6 .bss          00008f09  0000000081040200  0000000081040200  000411fc  2**3

                  ALLOC

The executable image produced, image.elf looks ok with a quick scan using readelf.

Sebastian, do you have any thoughts on why the linker gets upset with when the .note.gnu.build-id section is not discarded?

Thanks,