From: Arnd Bergmann <arnd@arndb.de>
To: Joseph Myers <joseph@codesourcery.com>
Cc: Mao Han <han_mao@c-sky.com>,
gnu-csky@mentor.com, GNU C Library <libc-alpha@sourceware.org>,
c-sky_gcc_upstream@c-sky.com
Subject: Re: [gnu-csky] [PATCH v4 06/13] C-SKY: Linux ABI
Date: Thu, 13 Sep 2018 21:38:00 -0000 [thread overview]
Message-ID: <CAK8P3a14ds=SuU0rD15cxP6LLpA8yQNnA4+VLF5juRLymSib-g@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.21.1809132045450.10670@digraph.polyomino.org.uk>
On Thu, Sep 13, 2018 at 10:48 PM Joseph Myers <joseph@codesourcery.com> wrote:
>
> On Thu, 13 Sep 2018, Arnd Bergmann wrote:
>
> > We have four definitions in the kernel for these structures: The native
> > structure for the ELF implementation [2], the generic compat implementation[3]
> > for everything other than MIPS, and the two MIPS variants [4][5].
> > Looking at the sources, the last three seem to use identical layouts,
> > aside from the elf_gregset_t, which uses 64-bit registers on n64 but
> > 32-bit registers everywhere else, and the architecture specific
> > ELF_NGREG constant.
>
> A 64-bit MIPS kernel is n64, not n32, so "unsigned long" in
> binfmt_elfn32.c is actually a 64-bit type for registers (as expected).
>
> I think this confirms that the other two n32 conditionals in
> sysdeps/unix/sysv/linux/mips/sys/procfs.h are incorrect, as they would
> result in a field having the size it does for n64, not that for n32.
Yes, that sounds right. From what I can tell, the n32 ABI has come
out of fashion a bit: the embedded stuff tends to be 32-bit only
so it uses o32, and the Debian and Fedora ports port do either
n64 or o32 but not n32. There was a partial Fedora 12 n32 port, but
that was 7 years ago.
Arnd
next prev parent reply other threads:[~2018-09-13 21:38 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-12 2:56 [PATCH v4 00/13] port C-SKY to glibc Mao Han
[not found] ` <cover.1536720821.git.han_mao@c-sky.com>
2018-09-12 2:56 ` [PATCH v4 05/13] C-SKY: Linux Syscall Interface Mao Han
2018-09-12 2:56 ` [PATCH v4 01/13] C-SKY: ABI related code Mao Han
2018-09-12 4:16 ` H.J. Lu
2018-09-12 7:07 ` Mao Han
2018-09-12 8:23 ` Florian Weimer
2018-09-12 9:06 ` Mao Han
2018-09-29 1:46 ` Palmer Dabbelt
2018-09-30 9:04 ` Manuel A. Fernandez Montecelo
2018-10-01 8:18 ` Richard W.M. Jones
2018-09-17 21:46 ` Joseph Myers
2018-09-18 6:09 ` Mao Han
2018-09-12 2:56 ` [PATCH v4 03/13] C-SKY: Math support Mao Han
2018-09-17 21:49 ` Joseph Myers
2018-09-18 6:05 ` Mao Han
2018-09-12 2:56 ` [PATCH v4 02/13] C-SKY: TLS support Mao Han
2018-09-12 2:57 ` [PATCH v4 08/13] C-SKY: Linux Startup and Dynamic Loading Code Mao Han
2018-09-12 2:57 ` [PATCH v4 13/13] C-SKY: Skeleton documentation Mao Han
2018-09-12 2:57 ` [PATCH v4 06/13] C-SKY: Linux ABI Mao Han
2018-09-12 13:40 ` Arnd Bergmann
2018-09-12 14:21 ` Joseph Myers
2018-09-12 15:34 ` Arnd Bergmann
2018-09-12 21:28 ` struct elf_prstatus and Y2038 (was: Re: [PATCH v4 06/13] C-SKY: Linux ABI) Florian Weimer
2018-09-13 10:48 ` Arnd Bergmann
2018-09-13 10:56 ` struct elf_prstatus and Y2038 Florian Weimer
2018-09-13 8:17 ` [PATCH v4 06/13] C-SKY: Linux ABI Mao Han
2018-09-13 8:46 ` Arnd Bergmann
2018-09-13 15:32 ` [gnu-csky] " Joseph Myers
2018-09-13 16:35 ` Joseph Myers
2018-09-13 20:47 ` Arnd Bergmann
2018-09-13 20:59 ` Joseph Myers
2018-09-13 21:32 ` Arnd Bergmann
2018-09-13 22:57 ` Joseph Myers
2018-09-13 20:31 ` Arnd Bergmann
2018-09-13 20:49 ` Joseph Myers
2018-09-13 21:38 ` Arnd Bergmann [this message]
2018-09-12 2:57 ` [PATCH v4 12/13] C-SKY: Add build-many-glibcs.py support Mao Han
2018-09-12 2:57 ` [PATCH v4 09/13] C-SKY: Add dynamic relocations to elf.h Mao Han
2018-09-12 2:57 ` [PATCH v4 11/13] C-SKY: Add ABI definitions in config.h.in Mao Han
2018-09-12 3:05 ` [PATCH v4 07/13] C-SKY: ABI Lists Mao Han
2018-09-12 6:51 ` Andreas Schwab
2018-09-12 7:12 ` Mao Han
2018-09-12 12:35 ` Joseph Myers
2018-09-12 13:46 ` Andreas Schwab
2018-09-12 15:19 ` Joseph Myers
2018-09-13 8:23 ` Mao Han
2018-09-12 3:05 ` [PATCH v4 04/13] C-SKY: NPTL support and Atomic Mao Han
2018-09-12 3:05 ` [PATCH v4 10/13] C-SKY: Build Infastructure Mao Han
2018-09-17 21:52 ` Joseph Myers
2018-09-18 6:02 ` Mao Han
2018-09-12 3:05 ` [PATCH 1/1] Update config.guess and config.sub to current versions Mao Han
2018-09-12 12:31 ` [PATCH v4 00/13] port C-SKY to glibc Joseph Myers
2018-09-13 8:14 ` Mao Han
2018-09-13 12:36 ` Joseph Myers
2018-09-18 6:22 ` Mao Han
2018-09-18 7:18 ` Mao Han
2018-09-18 11:43 ` Joseph Myers
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