GitHub - jhswartz/shelf: Shell scripts that spawn ELF objects without a linker.

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Shell scripts that spawn ELF objects without a linker.

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Name		Name	Last commit message	Last commit date
Latest commit History 1 Commit
amd64/linux		amd64/linux
README		README
shelf		shelf

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DEMO CODE

  $ printf "\110\307\307\200\000\000\000" >  /tmp/a.code  # mov $0x80,%rdi
  $ printf "\110\307\300\074\000\000\000" >> /tmp/a.code  # mov $0x3c,%rax
  $ printf "\017\005"                     >> /tmp/a.code  # syscall


GENERATE AN EXECUTABLE OBJECT

  $ ./shelf amd64/linux/exec.plan
  usage: exec.plan TEXT-FILE DATA-FILE BSS-SIZE

  $ ./shelf amd64/linux/exec.plan /tmp/a.code /dev/null 0 > /tmp/a.out
  $ chmod 755 /tmp/a.out

  $ strace -e trace=all /tmp/a.out
  execve("/tmp/a.out", ["/tmp/a.out"], 0x7ffd7141ec10 /* 35 vars */) = 0
  exit(128)                               = ?
  +++ exited with 128 +++