Re: [PATCH 04/10] bsd-user: Implement freebsd11_mknod, freebsd11_mknodat and mknodat

[Richard Henderson <richard.henderson@linaro.org>]

On 6/20/22 10:42, Warner Losh wrote:
> These implement both the old-pre INO64 mknod variations, as well as the
> now current INO64 variant. To implement the old stuff, we use some
> linker magic to bind to the old versions of these functions.
> 
> Signed-off-by: Stacey Son <sson@FreeBSD.org>
> Signed-off-by: Michal Meloun <mmel@FreeBSD.org>
> Signed-off-by: Warner Losh <imp@bsdimp.com>
> ---
>   bsd-user/bsd-file.h           | 59 +++++++++++++++++++++++++++++++++++
>   bsd-user/freebsd/os-syscall.c | 15 +++++++++
>   2 files changed, 74 insertions(+)
> 
> diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h
> index 0585f6a2a40..3be832b2a74 100644
> --- a/bsd-user/bsd-file.h
> +++ b/bsd-user/bsd-file.h
> @@ -51,6 +51,16 @@ do {                                        \
>       unlock_user(p1, arg1, 0);               \
>   } while (0)
>   
> +#ifndef BSD_HAVE_INO64
> +#define freebsd11_mknod         mknod
> +#define freebsd11_mknodat       mknodat
> +#else
> +int freebsd11_mknod(char *path, mode_t mode, uint32_t dev);
> +__sym_compat(mknod, freebsd11_mknod, FBSD_1.0);
> +int freebsd11_mknodat(int fd, char *path, mode_t mode, uint32_t dev);
> +__sym_compat(mknodat, freebsd11_mknodat, FBSD_1.1);
> +#endif

Where does BSD_HAVE_INO64 come from?  I can't find it defined in freebsd git.

You should probably avoid the linker tricks and use direct syscalls of 
SYS_freebsd11_mknodat etc.


r~