Re: [PATCH 10/19] LoongArch: Add signal handling support

[Arnd Bergmann <arnd@kernel.org>]

On Tue, Jul 6, 2021 at 6:18 AM Huacai Chen <chenhuacai@loongson.cn> wrote:
>
> This patch adds signal handling support for LoongArch.
>
> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Eric Biederman should review this part as well.

> --- /dev/null
> +++ b/arch/loongarch/include/asm/sigcontext.h
> @@ -0,0 +1,10 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2020-2021 Loongson Technology Corporation Limited
> + */
> +#ifndef _ASM_SIGCONTEXT_H
> +#define _ASM_SIGCONTEXT_H
> +
> +#include <uapi/asm/sigcontext.h>
> +
> +#endif /* _ASM_SIGCONTEXT_H */

Remove this file

> + */
> +#ifndef _UAPI_ASM_SIGINFO_H
> +#define _UAPI_ASM_SIGINFO_H
> +
> +#if _LOONGARCH_SZLONG == 32
> +#define __ARCH_SI_PREAMBLE_SIZE (3 * sizeof(int))
> +#else
> +#define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
> +#endif

These are no longer used.

> +
> +#ifndef _NSIG
> +#define _NSIG          128
> +#endif

Everything else uses 64 here, except for MIPS.


> +#define _NSIG_BPW      __BITS_PER_LONG
> +#define _NSIG_WORDS    (_NSIG / _NSIG_BPW)
> +
> +#define SIGHUP          1
> +#define SIGINT          2
> +#define SIGQUIT                 3
> +#define SIGILL          4
> +#define SIGTRAP                 5
> +#define SIGABRT                 6
> +#define SIGIOT          6
> +#define SIGBUS          7
> +#define SIGFPE          8
> +#define SIGKILL                 9
> +#define SIGUSR1                10
> +#define SIGSEGV                11
> +#define SIGUSR2                12
> +#define SIGPIPE                13
> +#define SIGALRM                14
> +#define SIGTERM                15
> +#define SIGSTKFLT      16
> +#define SIGCHLD                17
> +#define SIGCONT                18
> +#define SIGSTOP                19
> +#define SIGTSTP                20
> +#define SIGTTIN                21
> +#define SIGTTOU                22
> +#define SIGURG         23
> +#define SIGXCPU                24
> +#define SIGXFSZ                25
> +#define SIGVTALRM      26
> +#define SIGPROF                27
> +#define SIGWINCH       28
> +#define SIGIO          29
> +#define SIGPOLL                SIGIO
> +#define SIGPWR         30
> +#define SIGSYS         31
> +#define        SIGUNUSED       31

Please try to use the asm-generic version of these definitions instead
copying them. If you need something different, you can add an #ifdef there,
and then we can discuss whether the difference makes sense.

        Arnd