Re: [Qemu-devel] [PATCH 7/7] Enable fork and MIPS64 specific changes in mq_open syscall

["Andreas Färber" <andreas.faerber@web.de>]

Am 28.09.2011 06:38, schrieb khansa@kics.edu.pk:
> From: Khansa Butt <khansa@kics.edu.pk>
>
Please prefix the subject with "linux-user: ".
Where's the preceding 6 patches?

Patch description is missing.
> Signed-off-by: Khansa Butt <khansa@kics.edu.pk>
> ---
>  configure            |    1 +
>  linux-user/syscall.c |   11 +++++++++--
>  2 files changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/configure b/configure
> index 5e45a43..8d39fda 100755
> --- a/configure
> +++ b/configure
> @@ -3286,6 +3286,7 @@ case "$target_arch2" in
>      TARGET_ARCH=mips64
>      TARGET_BASE_ARCH=mips
>      echo "TARGET_ABI_MIPSN64=y" >> $config_target_mak
> +    target_nptl="yes"
How is this related to the mq_open syscall?
If it isn't, please put it into a separate patch.
>      target_phys_bits=64
>      target_long_alignment=8
>    ;;
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 6b73769..97ac9fb 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -7799,10 +7799,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
>          {
>              struct mq_attr posix_mq_attr;
>  
> +#if defined(TARGET_MIPS64)
> +            arg2 = arg2 & 0xff;
> +            arg2 = arg2 | 0x40;
What's 0x40? Please use a define or enum instead of the magic number.
I'd also humbly suggest to add inline comments (in addition to an
appropriate description above) to explain *why* this is necessary and
correct.
> +#endif
> +
>              p = lock_user_string(arg1 - 1);
> -            if (arg4 != 0)
> +            if (arg4 != 0) {
>                  copy_from_user_mq_attr (&posix_mq_attr, arg4);
> -            ret = get_errno(mq_open(p, arg2, arg3, &posix_mq_attr));
> +                ret = get_errno(mq_open(p, arg2, arg3, &posix_mq_attr));
> +            } else if (arg4 == 0)
> +                ret = get_errno(mq_open(p, arg2, arg3, NULL));
Coding Style requires braces.
>              unlock_user (p, arg1, 0);
>          }
>          break;

Andreas