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Re: [PATCH] [BZ #19363] Use INTERNAL_SYSCALL_TIMES for Linux times
- From: Florian Weimer <fweimer at redhat dot com>
- To: Andreas Schwab <schwab at suse dot de>
- Cc: "H.J. Lu" <hjl dot tools at gmail dot com>, GNU C Library <libc-alpha at sourceware dot org>
- Date: Wed, 16 Dec 2015 18:08:15 +0100
- Subject: Re: [PATCH] [BZ #19363] Use INTERNAL_SYSCALL_TIMES for Linux times
- Authentication-results: sourceware.org; auth=none
- References: <20151215032733 dot GA14426 at gmail dot com> <mvm37v49itj dot fsf at hawking dot suse dot de> <20151215150001 dot GT11489 at vapier dot lan> <mvmtwnj7ni7 dot fsf at hawking dot suse dot de> <CAMe9rOqi=mbzbSzPB26HHm=K0iddv6K8Cs8ACbDd_p=Q-ShWew at mail dot gmail dot com> <mvm7fkf7hr0 dot fsf at hawking dot suse dot de> <CAMe9rOrZc-CM4Rh4YBGUQeZzFC9kB0MJ8c-QZ_UST9s5=VXjYg at mail dot gmail dot com> <8760zza83t dot fsf at igel dot home> <CAMe9rOphOzT=M9ni=Cxar=vaob3rgFoiGO2KS+jbetAXLQ5F3g at mail dot gmail dot com> <871tan9trb dot fsf at igel dot home> <CAMe9rOq00tDiFqZh0g3tpfd9c1oKo7=k-Be3uF_ATTn0e9mQpQ at mail dot gmail dot com> <mvm37v27put dot fsf at hawking dot suse dot de> <CAMe9rOpRFDQsymEAiZ=MGXL49aZDBMfuMG=KrYZRGdS4DdZGrQ at mail dot gmail dot com> <mvmbn9q5xen dot fsf at hawking dot suse dot de> <CAMe9rOqFGUdyp_PZTxgmKEt8v8MYL36v6-zKcmO926XneM1JZw at mail dot gmail dot com> <mvm7fke5vgj dot fsf at hawking dot suse dot de>
On 12/16/2015 03:17 PM, Andreas Schwab wrote:
> "H.J. Lu" <hjl.tools@gmail.com> writes:
>
>> Then they have to use proper type to hold the return from "syscall".
>
> The proper type is long long which works for both x86_64 and x32.
Which specification location are we talking about?
In general, on x86_64, using long long where int is eventually required
can cause the compiler to emit an unnecessary truncation.
Florian