Re: ppc/ppc64 and x86 vsyscalls

[Ulrich Drepper]

Benjamin Herrenschmidt wrote:

> /* In one place the actual function implementation */
>  function_A_vers_1()
>  function_A_vers_2()
>  function_A_vers_3()
>  function_B_vers_1()
>  function_B_vers_2()
>    etc .../...
> 
> /* Then, some empty "stubs" for the symbol table that gets really
>  * linked into user binaries. Those are the symbol table entries
>  * that get patched
>  */
>  function_A() {}
>  function_B() {}
> 
> Sounds right ?

Basically yes.  But you don't actually need the stub functions.  You
just need a symbol table entry which can be arranged via an alias to any
one of the real functions.

-- 
â Ulrich Drepper â Red Hat, Inc. â 444 Castro St â Mountain View, CA â
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