* Can gcc generate an x86 "far return"?
@ 2009-02-08 0:39 John Z. Bohach
2009-02-09 19:40 ` Michael Meissner
0 siblings, 1 reply; 2+ messages in thread
From: John Z. Bohach @ 2009-02-08 0:39 UTC (permalink / raw)
To: gcc-help
Is there an __attribute__ or #pragma or some other facility to get gcc
to generate an "lret" (opcode 0xcb as opposed to opcode 0xc3) at the
end of a void function?
I am able to generate my own "lret" via inline assembly, but I was
wondering if the compiler offered any other options?
Thanks,
John
(I'm talking i386 and newer...).
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Can gcc generate an x86 "far return"?
2009-02-08 0:39 Can gcc generate an x86 "far return"? John Z. Bohach
@ 2009-02-09 19:40 ` Michael Meissner
0 siblings, 0 replies; 2+ messages in thread
From: Michael Meissner @ 2009-02-09 19:40 UTC (permalink / raw)
To: John Z. Bohach; +Cc: gcc-help
On Sat, Feb 07, 2009 at 04:36:04PM -0800, John Z. Bohach wrote:
> Is there an __attribute__ or #pragma or some other facility to get gcc
> to generate an "lret" (opcode 0xcb as opposed to opcode 0xc3) at the
> end of a void function?
>
> I am able to generate my own "lret" via inline assembly, but I was
> wondering if the compiler offered any other options?
There is no current support in the compiler for generating an LRET instruction
directly.
--
Michael Meissner, IBM
4 Technology Place Drive, MS 2203A, Westford, MA, 01886, USA
meissner@linux.vnet.ibm.com
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