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Re: [Qemu-trivial] User mode support for Linux ELF files with no section


From: Craig Heffner
Subject: Re: [Qemu-trivial] User mode support for Linux ELF files with no section headers
Date: Mon, 5 Dec 2011 18:47:41 -0500

CC'd Linux user maintainer.

On Mon, Dec 5, 2011 at 2:14 PM, Craig <address@hidden> wrote:
In user mode Linux, Qemu currently refuses to load ELF files that do not contain section headers (ehdr->e_shentsize == 0). Since section headers are not required in order to load an ELF file, simply removing the e_shentsize check in elf_check_ehdr() allows ELF binaries with no section headers to be run properly in user mode:

Signed-off-by: Craig Heffner <address@hidden>
--- 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));
 }



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