From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 13/17] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it
Date: Fri, 13 Nov 2015 16:34:10 +0100 [thread overview]
Message-ID: <3810107.ZiMyX4Iloo@wuerfel> (raw)
In-Reply-To: <mvm4mgrxrbt.fsf@hawking.suse.de>
On Thursday 12 November 2015 14:47:18 Andreas Schwab wrote:
> Arnd Bergmann <arnd@arndb.de> writes:
>
> > On Thursday 12 November 2015 10:44:55 Andreas Schwab wrote:
> >> Arnd Bergmann <arnd@arndb.de> writes:
> >>
> >> > What do you mean with 32-bit off_t?
> >>
> >> An ABI with 32-bit off_t, ie. all currently implemented 32-bit ABIs.
> >>
> >> > Do you mean that glibc emulates a 32-bit off_t on top of the 64-bit
> >> > __kernel_loff_t?
> >>
> >> Glibc is bridging the user-space ABI to the kernel ABI.
> >
> > Ok, but why?
>
> That's how the ABI is defined right now. I didn't make that up.
Ok, I guess it will remain a mystery then.
Should we perhaps define __ARCH_WANT_SYSCALL_OFF_T for the unistd.h
file then, so we provide both the off_t and the loff_t based syscalls?
That would avoid the extra wrapper in glibc when using a 32-bit
off_t if that is the preferred mode for user space.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Andreas Schwab <schwab@suse.de>
Cc: linux-arm-kernel@lists.infradead.org,
Yury Norov <ynorov@caviumnetworks.com>,
pinskia@gmail.com, Prasun.Kapoor@caviumnetworks.com,
catalin.marinas@arm.com, Nathan_Lynch@mentor.com,
linux-kernel@vger.kernel.org, agraf@suse.de,
klimov.linux@gmail.com,
Andrew Pinski <Andrew.Pinski@caviumnetworks.com>,
broonie@kernel.org, jan.dakinevich@gmail.com,
Andrew Pinski <apinski@cavium.com>,
ddaney.cavm@gmail.com, bamvor.zhangjian@huawei.com,
philipp.tomsich@theobroma-systems.com,
andrey.konovalov@linaro.org,
christoph.muellner@theobroma-systems.com
Subject: Re: [PATCH v6 13/17] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it
Date: Fri, 13 Nov 2015 16:34:10 +0100 [thread overview]
Message-ID: <3810107.ZiMyX4Iloo@wuerfel> (raw)
In-Reply-To: <mvm4mgrxrbt.fsf@hawking.suse.de>
On Thursday 12 November 2015 14:47:18 Andreas Schwab wrote:
> Arnd Bergmann <arnd@arndb.de> writes:
>
> > On Thursday 12 November 2015 10:44:55 Andreas Schwab wrote:
> >> Arnd Bergmann <arnd@arndb.de> writes:
> >>
> >> > What do you mean with 32-bit off_t?
> >>
> >> An ABI with 32-bit off_t, ie. all currently implemented 32-bit ABIs.
> >>
> >> > Do you mean that glibc emulates a 32-bit off_t on top of the 64-bit
> >> > __kernel_loff_t?
> >>
> >> Glibc is bridging the user-space ABI to the kernel ABI.
> >
> > Ok, but why?
>
> That's how the ABI is defined right now. I didn't make that up.
Ok, I guess it will remain a mystery then.
Should we perhaps define __ARCH_WANT_SYSCALL_OFF_T for the unistd.h
file then, so we provide both the off_t and the loff_t based syscalls?
That would avoid the extra wrapper in glibc when using a 32-bit
off_t if that is the preferred mode for user space.
Arnd
next prev parent reply other threads:[~2015-11-13 15:34 UTC|newest]
Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-02 23:30 [RFC PATCH v6 00/17] ILP32 for ARM64 Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 01/17] arm64:ilp32: add documentation on the ILP32 ABI " Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-05 14:33 ` Arnd Bergmann
2015-11-05 14:33 ` Arnd Bergmann
2015-11-02 23:30 ` [PATCH v6 02/17] arm64: ensure the kernel is compiled for LP64 Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 03/17] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 04/17] arm64: change some CONFIG_COMPAT over to use CONFIG_AARCH32_EL0 instead Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 05/17] arm64:ilp32: share signal structures between ILP32 and LP64 ABIs Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 06/17] arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 07/17] arm64:ilp32: add is_ilp32_compat_{task, thread} and TIF_32BIT_AARCH64 Yury Norov
2015-11-02 23:30 ` [PATCH v6 07/17] arm64:ilp32: add is_ilp32_compat_{task,thread} " Yury Norov
2015-11-02 23:30 ` [PATCH v6 08/17] arm64:ilp32: share HWCAP between LP64 and ILP32 Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 09/17] arm64:ilp32 use the native LP64 'start_thread' for ILP32 threads Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 10/17] arm64:ilp32: support core dump generation for ILP32 Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 11/17] ptrace: Allow compat to use the native siginfo Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-05 13:53 ` Arnd Bergmann
2015-11-05 13:53 ` Arnd Bergmann
2015-11-02 23:30 ` [PATCH v6 12/17] ilp32: common 32-bit wrappers Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 13/17] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-05 13:50 ` Arnd Bergmann
2015-11-05 13:50 ` Arnd Bergmann
2015-11-11 17:54 ` Andreas Schwab
2015-11-11 17:54 ` Andreas Schwab
2015-11-11 20:40 ` Arnd Bergmann
2015-11-11 20:40 ` Arnd Bergmann
2015-11-11 23:07 ` Andreas Schwab
2015-11-11 23:07 ` Andreas Schwab
2015-11-11 23:23 ` Arnd Bergmann
2015-11-11 23:23 ` Arnd Bergmann
2015-11-12 8:58 ` Andreas Schwab
2015-11-12 8:58 ` Andreas Schwab
2015-11-12 9:22 ` Arnd Bergmann
2015-11-12 9:22 ` Arnd Bergmann
2015-11-12 9:44 ` Andreas Schwab
2015-11-12 9:44 ` Andreas Schwab
2015-11-12 13:24 ` Arnd Bergmann
2015-11-12 13:24 ` Arnd Bergmann
2015-11-12 13:47 ` Andreas Schwab
2015-11-12 13:47 ` Andreas Schwab
2015-11-13 15:34 ` Arnd Bergmann [this message]
2015-11-13 15:34 ` Arnd Bergmann
2015-11-13 15:38 ` Andrew Pinski
2015-11-13 15:38 ` Andrew Pinski
2015-11-13 16:10 ` Arnd Bergmann
2015-11-13 16:10 ` Arnd Bergmann
2015-11-15 15:18 ` Arnd Bergmann
2015-11-15 15:18 ` Arnd Bergmann
2015-11-15 16:42 ` Chris Metcalf
2015-11-15 16:42 ` Chris Metcalf
2015-11-16 10:16 ` Joseph Myers
2015-11-16 10:16 ` Joseph Myers
2015-11-16 11:00 ` Arnd Bergmann
2015-11-16 11:00 ` Arnd Bergmann
2015-11-16 11:12 ` Joseph Myers
2015-11-16 11:12 ` Joseph Myers
2015-11-16 11:40 ` Arnd Bergmann
2015-11-16 11:40 ` Arnd Bergmann
2015-11-16 12:03 ` Joseph Myers
2015-11-16 12:03 ` Joseph Myers
2015-11-16 12:12 ` Arnd Bergmann
2015-11-16 12:12 ` Arnd Bergmann
2015-11-16 12:34 ` Joseph Myers
2015-11-16 12:34 ` Joseph Myers
2015-11-16 13:15 ` Arnd Bergmann
2015-11-16 13:15 ` Arnd Bergmann
2015-11-16 13:34 ` Andreas Schwab
2015-11-16 13:34 ` Andreas Schwab
2015-11-16 13:54 ` Arnd Bergmann
2015-11-16 13:54 ` Arnd Bergmann
2015-11-02 23:30 ` [PATCH v6 14/17] aarch64: ilp32: use generic stat64 structure Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-05 14:03 ` Arnd Bergmann
2015-11-05 14:03 ` Arnd Bergmann
2015-11-02 23:30 ` [PATCH v6 15/17] arm64:ilp32: use the native siginfo instead of the compat siginfo Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 16/17] arm64:ilp32: change COMPAT_ELF_PLATFORM to report a a subplatform for ILP32 Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-02 23:30 ` [PATCH v6 17/17] arm64:ilp32: add ARM64_ILP32 to Kconfig Yury Norov
2015-11-02 23:30 ` Yury Norov
2015-11-05 11:36 ` [RFC PATCH v6 00/17] ILP32 for ARM64 Andreas Schwab
2015-11-05 11:36 ` Andreas Schwab
2015-11-05 13:39 ` Andrew Pinski
2015-11-05 13:39 ` Andrew Pinski
2015-11-05 22:18 ` Yury Norov
2015-11-05 22:18 ` Yury Norov
2015-11-09 10:01 ` Andreas Schwab
2015-11-09 10:01 ` Andreas Schwab
2015-11-11 7:16 ` Zhangjian (Bamvor)
2015-11-11 7:16 ` Zhangjian (Bamvor)
2015-11-11 8:44 ` Andreas Schwab
2015-11-11 8:44 ` Andreas Schwab
2015-11-09 13:23 ` Andreas Schwab
2015-11-09 13:23 ` Andreas Schwab
2015-11-09 14:21 ` Arnd Bergmann
2015-11-09 14:21 ` Arnd Bergmann
2015-11-09 14:33 ` Andreas Schwab
2015-11-09 14:33 ` Andreas Schwab
2015-11-09 14:36 ` Arnd Bergmann
2015-11-09 14:36 ` Arnd Bergmann
2015-11-09 14:52 ` pinskia at gmail.com
2015-11-09 14:52 ` pinskia
2015-11-09 15:50 ` Yury Norov
2015-11-09 15:50 ` Yury Norov
2015-11-09 16:04 ` Yury Norov
2015-11-09 16:04 ` Yury Norov
2015-12-01 22:55 ` Iosif Harutyunov
2015-12-03 17:05 ` Yury Norov
2015-12-03 17:05 ` Yury Norov
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