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Re: [PATCH] manual: Document getcontext uc_stack value on Linux [BZ #759]
- From: Zack Weinberg <zackw at panix dot com>
- To: Adhemerval Zanella <adhemerval dot zanella at linaro dot org>
- Cc: GNU C Library <libc-alpha at sourceware dot org>
- Date: Tue, 11 Jul 2017 14:23:11 -0400
- Subject: Re: [PATCH] manual: Document getcontext uc_stack value on Linux [BZ #759]
- Authentication-results: sourceware.org; auth=none
- References: <1494961861-30734-1-git-send-email-adhemerval.zanella@linaro.org> <6d9cf350-c221-3fac-0088-384b42c45adb@linaro.org> <77500c0f-e6f6-43b8-b7b3-b3af65a5b968@linaro.org>
On Tue, Jul 11, 2017 at 1:56 PM, Adhemerval Zanella
<adhemerval.zanella@linaro.org> wrote:
> Ping (x2). I think something we won't bother to emulate solaris behaviour,
> so in a short we should document it and close it.
I agree that existing behavior should not be changed, but the text you
proposed for the manual doesn't make a lot of sense unless you already
know what the problem is.
>>> +On Linux the stack information return on @code{uc_stack} is empty by
>>> +default. It also the case for signal handling information through
>>> +@code{sigaction} with @code{SA_SIGINFO}. It could be obtained using
>>> +architecture specific field from @code{uc_mcontext} member.
@strong{Compatibility Note:} Depending on the operating system,
information about the current context's stack may be in the
@code{uc_stack} field of @var{ucp}, or it may instead instead be in
architecture-specific subfields of the @code{uc_mcontext} field.
The detail regarding 'sigaction' belongs in the documentation for
'sigaction', and we currently don't document SA_SIGINFO at all, so I
would just leave that bit out.
zw