Re: ucontext
Re: ucontext
- Subject: Re: ucontext
- From: Cyrus Harmon <email@hidden>
- Date: Tue, 28 Feb 2006 10:53:24 -0800
So clearly sys/uncontext.h exists on Darwin. The questions are:
1) What are the differences between signal handling on PPC and X86?
Is there a technote or other documentation that describes these
differences?
2) What are the arguments that get passed to signal handlers? It
seems that the first argument is a siginfo_t, and that the second is
a ucontext_t, but what about intel? Clearly the machine context
structures will have changed, but the header files are a maze of
twisty ifdefs, all alike. On Intel, I can cast the third argument to
a signal handler to a sigcontext, but it's not clear to me that the
values are right if I do that. OTOH, if I try to cast this to a
ucontext_t, as I was able to do on PPC, I get a complaint about this
being an incomplete type. It's possible I'm doing something wrong or
perhaps things have changed. A nice document describing how to get
information like the value of the PC/EIP, would be rather handy.
I don't see how this is any way "obsolete" or inappropriate for a
mailing list about development using the Darwin kernel.
Cyrus
On Feb 16, 2006, at 3:37 AM, Markus Hitter wrote:
Am 16.02.2006 um 11:50 schrieb Steve Dekorte:
Are there any plans to support ucontext on OSX?
This is a obsolete question for two reasons:
1) Apple never talks about future plans.
2) If the sole purpose of your programming task is making use of
"ucontext" (whatever this is), then you better choose a platform
which supports it.
Probably you have some higher goal in mind, so asking how to solve
this might get you there more quickly.
Markus
- - - - - - - - - - - - - - - - - - -
Dipl. Ing. Markus Hitter
http://www.jump-ing.de/
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| References: | |
| | >ucontext (From: Steve Dekorte <email@hidden>) |
| | >Re: ucontext (From: Markus Hitter <email@hidden>) |