LinuxGuruz
  • Last 5 Forum Topics
    Replies
    Views
    Last post


The Web Only This Site
  • BOOKMARK

  • ADD TO FAVORITES

  • REFERENCES


  • MARC

    Mailing list ARChives
    - Search by -
     Subjects
     Authors
     Bodies





    FOLDOC

    Computing Dictionary




  • Text Link Ads






  • LINUX man pages
  • Linux Man Page Viewer


    The following form allows you to view linux man pages.

    Command:

    execstack

    
    
    
    

    SYNOPSIS

           execstack [OPTION...] [FILES]
    
    
    

    DESCRIPTION

           execstack is a program which sets, clears, or queries executable  stack
           flag  of  ELF  binaries  and  shared  libraries.  Linux has in the past
           allowed execution of instructions on the stack and there  are  lots  of
           binaries  and  shared  libraries assuming this behaviour.  Furthermore,
           GCC trampoline code for e.g. nested functions requires executable stack
           on many architectures.  To avoid breaking binaries and shared libraries
           which need executable stack, ELF binaries and shared libraries now  can
           be  marked  as  requiring  executable  stack or not requiring it.  This
           marking is done through the p_flags field in the  PT_GNU_STACK  program
           header entry.  If the marking is missing, kernel or dynamic linker need
           to assume it might need executable stack.  The marking is done automat-
           ically  by  recent GCC versions (objects using trampolines on the stack
           are marked as requiring executable stack, all other newly built objects
           are marked as not requiring it) and linker collects these markings into
           marking of the whole binary or shared library.  The user  can  override
           this  at  assembly time (through --execstack or --noexecstack assembler
           options), at link time (through -z execstack or -z  noexecstack  linker
           options)  and using the execstack tool also on an already linker binary
           or shared library.  This tool is  especially  useful  for  third  party
           shared  libraries  where  it  is  known that they don't need executable
           stack or testing proves it.
    
    
    

    OPTIONS

           -s --set-execstack
                  Mark binary or shared library as requiring executable stack.
    
           -c --clear-execstack
                  Mark binary or shared library as not requiring executable stack.
    
           -q --query
                  Query executable stack marking of binaries and shared libraries.
                  For each file it prints either - when executable  stack  is  not
                  required,  X  when executable stack is required or ?  when it is
                  unknown whether the object  requires  or  doesn't  require  exe-
                  cutable stack (the marking is missing).
    
           -V     Print execstack version and exit.
    
           -? --help
                  Print help message.
    
           --usage
                  Print a short usage message.
    
    
    

    ARGUMENTS

           Command  line  arguments  should  be  names  of ELF binaries and shared
           libraries which should be modified or queried.
           have  PT_GNU_STACK  program header entry nor they have room for program
           segment header table growth.
    
    
    

    AUTHORS

           Jakub Jelinek <jakub@redhat.com>.
    
                                    28 October 2003                   execstack(8)
    
  • MORE RESOURCE


  • Linux

    The Distributions





    Linux

    The Software





    Linux

    The News



  • MARKETING






  • Toll Free

webmaster@linuxguruz.com
Copyright © 1999 - 2016 by LinuxGuruz