ptrace for mips n32 and n64

[Alexandre Oliva]

On Mar 14, 2003, Daniel Jacobowitz <drow@mvista.com> wrote:

> Eh?  No it won't.  ptrace is exported as a varargs function.  Think
> about what happens when you pass a 32-bit pointer to a varargs function
> that pops a long long argument.

Let's see...  The 32-bit argument gets passed in a single register,
therefore it is sign-extended.  The entry code may or may not save the
register as a 64-bit value in the stack, but regardless of how it does
it, it just works.  Remember n32 is a 64-bit architecture.  All
arguments are passed in 64-bit slots, registers or stack.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist                Professional serial bug killer