From: Huacai Chen <chenhuacai@gmail.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Huacai Chen <chenhuacai@loongson.cn>,
Arnd Bergmann <arnd@arndb.de>, Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Airlie <airlied@linux.ie>, Jonathan Corbet <corbet@lwn.net>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-arch <linux-arch@vger.kernel.org>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Xuefeng Li <lixuefeng@loongson.cn>,
Yanteng Si <siyanteng@loongson.cn>, Guo Ren <guoren@kernel.org>,
Xuerui Wang <kernel@xen0n.name>,
Jiaxun Yang <jiaxun.yang@flygoat.com>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH V11 14/22] LoongArch: Add signal handling support
Date: Thu, 19 May 2022 00:54:24 +0800 [thread overview]
Message-ID: <CAAhV-H5Aov1NVsbNWZa9psPhBiNssYWWEzNOyLooeXGKsYxN+w@mail.gmail.com> (raw)
In-Reply-To: <87ilq294mg.fsf@email.froward.int.ebiederm.org>
Hi, Eric,
On Thu, May 19, 2022 at 12:40 AM Eric W. Biederman
<ebiederm@xmission.com> wrote:
>
> Huacai Chen <chenhuacai@loongson.cn> writes:
>
> > Add ucontext/sigcontext definition and signal handling support for
> > LoongArch.
> >
> > Cc: Eric Biederman <ebiederm@xmission.com>
> > Cc: Al Viro <viro@zeniv.linux.org.uk>
> > Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
> > ---
> > arch/loongarch/include/uapi/asm/sigcontext.h | 44 ++
> > arch/loongarch/include/uapi/asm/signal.h | 13 +
> > arch/loongarch/include/uapi/asm/ucontext.h | 35 ++
> > arch/loongarch/kernel/signal.c | 566 +++++++++++++++++++
> > 4 files changed, 658 insertions(+)
> > create mode 100644 arch/loongarch/include/uapi/asm/sigcontext.h
> > create mode 100644 arch/loongarch/include/uapi/asm/signal.h
> > create mode 100644 arch/loongarch/include/uapi/asm/ucontext.h
> > create mode 100644 arch/loongarch/kernel/signal.c
> >
> > diff --git a/arch/loongarch/include/uapi/asm/sigcontext.h b/arch/loongarch/include/uapi/asm/sigcontext.h
> > new file mode 100644
> > index 000000000000..be3d3c6ac83e
> > --- /dev/null
> > +++ b/arch/loongarch/include/uapi/asm/sigcontext.h
> > @@ -0,0 +1,44 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
> > +/*
> > + * Author: Hanlu Li <lihanlu@loongson.cn>
> > + * Huacai Chen <chenhuacai@loongson.cn>
> > + *
> > + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
> > + */
> > +#ifndef _UAPI_ASM_SIGCONTEXT_H
> > +#define _UAPI_ASM_SIGCONTEXT_H
> > +
> > +#include <linux/types.h>
> > +#include <linux/posix_types.h>
> > +
> > +/* FP context was used */
> > +#define SC_USED_FP (1 << 0)
> > +/* Address error was due to memory load */
> > +#define SC_ADDRERR_RD (1 << 30)
> > +/* Address error was due to memory store */
> > +#define SC_ADDRERR_WR (1 << 31)
> > +
> > +struct sigcontext {
> > + __u64 sc_pc;
> > + __u64 sc_regs[32];
> > + __u32 sc_flags;
> > + __u64 sc_extcontext[0] __attribute__((__aligned__(16)));
> > +};
> > +
> > +#define CONTEXT_INFO_ALIGN 16
> > +struct _ctxinfo {
> > + __u32 magic;
> > + __u32 size;
> > + __u64 padding; /* padding to 16 bytes */
> > +};
>
> This is probably something I a missing but what is struct _ctxinfo and
> why is it in a uapi header?
>
> I don't see anything else in the uapi implementation using it.
This is used by get_ctx_through_ctxinfo() in signal.c and I think
similar function is also needed by userspace.
Its name is once before called context_info but conflict with another
software, then I want to use ctx_info but conflict with another kernel
struct. :(
>
> Symbols that start with an underscore "_" are reserved and should not
> be used in general, and especially not in uapi header files.
Then, maybe we can use sctx_info here?
Huacai
>
> Eric
next prev parent reply other threads:[~2022-05-18 16:56 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-18 9:25 [PATCH V11 00/22] arch: Add basic LoongArch support Huacai Chen
2022-05-18 9:25 ` [PATCH V11 01/22] Documentation: LoongArch: Add basic documentations Huacai Chen
2022-05-18 15:34 ` WANG Xuerui
2022-05-18 9:25 ` [PATCH V11 02/22] Documentation/zh_CN: Add basic LoongArch documentations Huacai Chen
2022-05-18 15:32 ` WANG Xuerui
2022-05-20 7:37 ` Guo Ren
2022-05-20 7:43 ` WANG Xuerui
2022-05-18 9:26 ` [PATCH V11 03/22] LoongArch: Add ELF-related definitions Huacai Chen
2022-05-18 9:26 ` [PATCH V11 04/22] LoongArch: Add writecombine support for drm Huacai Chen
2022-05-18 9:26 ` [PATCH V11 05/22] LoongArch: Add build infrastructure Huacai Chen
2022-05-18 15:22 ` WANG Xuerui
2022-05-20 7:25 ` Guo Ren
2022-05-18 9:26 ` [PATCH V11 06/22] LoongArch: Add CPU definition headers Huacai Chen
2022-05-18 15:45 ` WANG Xuerui
2022-05-18 16:12 ` Huacai Chen
2022-05-18 9:26 ` [PATCH V11 07/22] LoongArch: Add atomic/locking headers Huacai Chen
2022-05-18 15:54 ` WANG Xuerui
2022-05-20 7:54 ` Guo Ren
2022-05-20 9:50 ` Huacai Chen
2022-05-20 18:14 ` Guo Ren
2022-05-21 1:55 ` Huacai Chen
2022-05-18 9:26 ` [PATCH V11 08/22] LoongArch: Add other common headers Huacai Chen
2022-05-18 16:04 ` WANG Xuerui
2022-05-18 9:26 ` [PATCH V11 09/22] LoongArch: Add boot and setup routines Huacai Chen
2022-05-18 15:17 ` WANG Xuerui
2022-05-18 16:08 ` Huacai Chen
2022-05-20 9:17 ` Ard Biesheuvel
2022-05-20 9:41 ` Javier Martinez Canillas
2022-05-20 14:09 ` Huacai Chen
2022-05-20 14:23 ` Javier Martinez Canillas
2022-05-20 15:19 ` Huacai Chen
2022-05-20 16:32 ` Javier Martinez Canillas
2022-05-21 1:40 ` Huacai Chen
2022-05-21 7:06 ` Javier Martinez Canillas
2022-05-21 7:37 ` Huacai Chen
2022-05-21 9:06 ` Javier Martinez Canillas
2022-05-21 9:13 ` Huacai Chen
2022-05-21 9:43 ` Javier Martinez Canillas
2022-05-20 15:53 ` Huacai Chen
2022-05-24 8:27 ` Xi Ruoyao
2022-05-24 10:59 ` Huacai Chen
2022-05-24 12:48 ` 李超
2022-05-18 9:26 ` [PATCH V11 10/22] LoongArch: Add exception/interrupt handling Huacai Chen
2022-05-18 9:26 ` [PATCH V11 11/22] LoongArch: Add process management Huacai Chen
2022-05-18 9:26 ` [PATCH V11 12/22] LoongArch: Add memory management Huacai Chen
2022-05-18 9:26 ` [PATCH V11 13/22] LoongArch: Add system call support Huacai Chen
2022-05-18 9:26 ` [PATCH V11 14/22] LoongArch: Add signal handling support Huacai Chen
2022-05-18 16:13 ` WANG Xuerui
2022-05-18 16:39 ` Eric W. Biederman
2022-05-18 16:54 ` Huacai Chen [this message]
2022-05-18 17:17 ` WANG Xuerui
2022-05-18 9:26 ` [PATCH V11 15/22] LoongArch: Add ELF and module support Huacai Chen
2022-05-18 9:26 ` [PATCH V11 16/22] LoongArch: Add misc common routines Huacai Chen
2022-05-18 9:57 ` [PATCH V11 17/22] LoongArch: Add some library functions Huacai Chen
2022-05-18 9:57 ` [PATCH V11 18/22] LoongArch: Add PCI controller support Huacai Chen
2022-05-18 9:57 ` [PATCH V11 19/22] LoongArch: Add VDSO and VSYSCALL support Huacai Chen
2022-05-18 9:57 ` [PATCH V11 20/22] LoongArch: Add multi-processor (SMP) support Huacai Chen
2022-05-18 9:57 ` [PATCH V11 21/22] LoongArch: Add Non-Uniform Memory Access (NUMA) support Huacai Chen
2022-05-18 9:57 ` [PATCH V11 22/22] LoongArch: Add Loongson-3 default config file Huacai Chen
2022-05-18 13:42 ` [PATCH V11 00/22] arch: Add basic LoongArch support Arnd Bergmann
2022-05-18 17:18 ` Huacai Chen
2022-05-18 22:36 ` Stephen Rothwell
2022-05-22 4:18 ` WANG Xuerui
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