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sysv: Define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64

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On y2038 safe 32-bit systems the Linux kernel expects itimerval
and rusage to use a 32-bit time_t, even though the other time_t's
are 64-bit. There are currently no plans to make 64-bit time_t versions
of these structs.

There are also other occurrences where the time passed to the kernel via
timeval doesn't match the wordsize.

To handle these cases let's define a new macro
__KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64. This macro specifies if the
kernel's old_timeval matches the new timeval64. This should be 1 for
64-bit architectures except for Alpha's osf syscalls. The define should
be 0 for 32-bit architectures and Alpha's osf syscalls.

Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Alistair Francis 2020-02-11 12:56:50 -08:00
parent a9d42c09a3
commit 1c634e677f
6 changed files with 32 additions and 0 deletions
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6
bits/typesizes.h
View File

@ -76,10 +76,16 @@
/* And for fsblkcnt_t, fsblkcnt64_t, fsfilcnt_t and fsfilcnt64_t. */
# define __STATFS_MATCHES_STATFS64 1
/* And for getitimer, setitimer and rusage */
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 1
#else
# define __RLIM_T_MATCHES_RLIM64_T 0
# define __STATFS_MATCHES_STATFS64 0
/* And for getitimer, setitimer and rusage */
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 0
#endif
/* Number of descriptors that can fit in an `fd_set'. */

3
sysdeps/unix/sysv/linux/alpha/bits/typesizes.h
View File

@ -73,6 +73,9 @@
/* Not for fsblkcnt_t, fsblkcnt64_t, fsfilcnt_t and fsfilcnt64_t. */
# define __STATFS_MATCHES_STATFS64 0
/* And for getitimer, setitimer and rusage */
#define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 1
/* Number of descriptors that can fit in an `fd_set'. */
#define __FD_SETSIZE 1024

6
sysdeps/unix/sysv/linux/generic/bits/typesizes.h
View File

@ -77,11 +77,17 @@
/* And for fsblkcnt_t, fsblkcnt64_t, fsfilcnt_t and fsfilcnt64_t. */
# define __STATFS_MATCHES_STATFS64 1
/* And for getitimer, setitimer and rusage */
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 1
#else
# define __RLIM_T_MATCHES_RLIM64_T 0
# define __STATFS_MATCHES_STATFS64 0
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 0
#endif
/* Number of descriptors that can fit in an `fd_set'. */
#define __FD_SETSIZE 1024

6
sysdeps/unix/sysv/linux/s390/bits/typesizes.h
View File

@ -82,10 +82,16 @@
/* And for fsblkcnt_t, fsblkcnt64_t, fsfilcnt_t and fsfilcnt64_t. */
# define __STATFS_MATCHES_STATFS64 1
/* And for getitimer, setitimer and rusage */
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 1
#else
# define __RLIM_T_MATCHES_RLIM64_T 0
# define __STATFS_MATCHES_STATFS64 0
/* And for getitimer, setitimer and rusage */
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 0
#endif
/* Number of descriptors that can fit in an `fd_set'. */

6
sysdeps/unix/sysv/linux/sparc/bits/typesizes.h
View File

@ -76,10 +76,16 @@
/* And for fsblkcnt_t, fsblkcnt64_t, fsfilcnt_t and fsfilcnt64_t. */
# define __STATFS_MATCHES_STATFS64 1
/* And for getitimer, setitimer and rusage */
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 1
#else
# define __RLIM_T_MATCHES_RLIM64_T 0
# define __STATFS_MATCHES_STATFS64 0
/* And for getitimer, setitimer and rusage */
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 0
#endif
/* Number of descriptors that can fit in an `fd_set'. */

5
sysdeps/unix/sysv/linux/x86/bits/typesizes.h
View File

@ -88,10 +88,15 @@
/* And for fsblkcnt_t, fsblkcnt64_t, fsfilcnt_t and fsfilcnt64_t. */
# define __STATFS_MATCHES_STATFS64 1
/* And for getitimer, setitimer and rusage */
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 1
#else
# define __RLIM_T_MATCHES_RLIM64_T 0
# define __STATFS_MATCHES_STATFS64 0
# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 0
#endif
/* Number of descriptors that can fit in an `fd_set'. */