Re: [PATCH] Add new hooks ASM_OUTPUT_START_FUNCTION_HEADER ...

[Dominik Vogt <vogt@linux.vnet.ibm.com>]

On Mon, Sep 28, 2015 at 01:54:17PM +0200, Bernd Schmidt wrote:
> On 09/28/2015 11:44 AM, Dominik Vogt wrote:
> >I mean, it's more or less random whether switching to and from the
> >function's section ends up inside the new .machine and
> >.machinemode directives (if the section needs to be switched for
> >this function) or outside (if the assembler code had already
> >switched to the correct section earlier).  I assume that .machine
> >and .machinemode have no effect on the section switching, but I'm
> >not completely sure (alignment?).
> 
> Still not really following since I don't know anything about s390
> and its directives.

.machine switches the Cpu (like .arch on x86) and .machinemode
switches between Esa and Zarch modes.


> In case you're trying to figure out whether it's possible to use
> the existing macros, please continue doing so.

I don't see any way to use existing hooks for that (because the
constant pool needs to be wrapped inside the hooks and there are
none that do that at the moment).

> However, you probably should add a sentence or two to
> the documentation to specify ordering wrt other parts of the header
> of a function.

Any suggestions where that information should be placed in the
documentation?

Ciao

Dominik ^_^  ^_^

-- 

Dominik Vogt
IBM Germany