Re: Linux 2.6.x.x Execution Process Question

[Jirka Kosina <jikos@jikos.cz>]

On Fri, 8 Jul 2005, u u wrote:

> Im looking for some help on some research I am conducting. Im trying to
> understand the complete execution process from start to finish of an ELF
> executable object on the i386 platform in particular, but x86_64 works
> as well. So far I have come up with the following:
> Shell passes arguments and environment to execve() -> sys_execve() ->
> do_execve() -> search_binary_handler() -> ?

If you are looking specifically for handling of the ELF format, then you 
have stopped your sequence sooner than it began to be interesting :)

search_binary_handler() then passes, in the case of the ELF object, the 
control to the function load_elf_binary(), implemented in fs/binfmt_elf.c

This is the place where the "execve() process" starts being object-type 
specific.

> 2.0 and 2.2. Im trying to find out the specifics of it all, for example
> which registers are zeroed out before passing control to userspace and
> where it happens. How does the stack look when control is passed? These
> types of specifics are what I had in mind.

You will find all this in load_elf_binary() and it's surroudings.

-- 
JiKos.
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