[Qemu-devel] [Bug 1317090] Re: qemu fails on ELF files with no section headers

[Serge Hallyn]

Yes, it's the same bug or same class of bugs where qemu is being
stricter than the kernel, for better or worse.

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https://bugs.launchpad.net/bugs/1317090

Title:
  qemu fails on ELF files with no section headers

Status in QEMU:
  Fix Released
Status in “qemu” package in Ubuntu:
  Fix Released

Bug description:
  Using the latest version of qemu-user-static from trusty, 2.0.0+dfsg-
  2ubuntu1.

  Reported to qemu and patch submitted long ago by the guy who wrote 
http://www.devttys0.com/2011/12/qemu-vs-sstrip/
  but apparently dropped on the floor - at least, I can't find it in any qemu 
bug tracker anywhere.  It's now keeping me from running openwrt binaries under 
qemu-arm-static (because the openwrt guys strip section headers to save space 
on their teeny embedded boxes).  It's a one-line patch, reproduced here:

  --- qemu/linux-user/elfload.c   2011-12-02 15:16:07.637541215 -0500
  +++ qemu-patched/linux-user/elfload.c   2011-12-02 15:27:24.061522798 -0500
  @@ -1068,7 +1068,6 @@ static bool elf_check_ehdr(struct elfhdr
       return (elf_check_arch(ehdr->e_machine)
               && ehdr->e_ehsize == sizeof(struct elfhdr)
               && ehdr->e_phentsize == sizeof(struct elf_phdr)
  -            && ehdr->e_shentsize == sizeof(struct elf_shdr)
               && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
   }

  And I hope you'll consider patching ubuntu and maybe helping it get
  pushed upstream.  Thanks!

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