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The shell-spawning shellcodes are rewritten to address the following
concerns:
- The array parameters to execve are now set properly, to valid
arrays on the stack, instead of NULL pointers.
- The cdq instruction is no longer used to sign-extend the rax
register, since it has not been producing the expected results in
gdb.
- Labels, sections, and other file metadata are removed in order to
support concatenation of shellcode samples to make more complex
code.
Signed-off-by: Malfurious <m@lfurio.us>
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