y2038: sparc: Extend sysvipc data structures
sparc, uses a nonstandard variation of the generic sysvipc data structures, intended to have the padding moved around so it can deal with big-endian 32-bit user space that has 64-bit time_t. Unlike most architectures, sparc actually succeeded in defining this right for big-endian CPUs, but as everyone else got it wrong, we just use the same hack everywhere. This takes just take the same approach here that we have for the asm-generic headers and adds separate 32-bit fields for the upper halves of the timestamps, to let libc deal with the mess in user space. Signed-off-by: Arnd Bergmann <arnd@arndb.de>hifive-unleashed-5.1
Arnd Bergmann
parent
f69c97f6a4
commit
91b9b0d718
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@ -192,10 +192,10 @@ struct compat_ipc64_perm {
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struct compat_semid64_ds {
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struct compat_ipc64_perm sem_perm;
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unsigned int __pad1;
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compat_time_t sem_otime;
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unsigned int __pad2;
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compat_time_t sem_ctime;
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unsigned int sem_otime_high;
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unsigned int sem_otime;
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unsigned int sem_ctime_high;
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unsigned int sem_ctime;
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u32 sem_nsems;
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u32 __unused1;
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u32 __unused2;
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@ -203,12 +203,12 @@ struct compat_semid64_ds {
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struct compat_msqid64_ds {
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struct compat_ipc64_perm msg_perm;
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unsigned int __pad1;
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compat_time_t msg_stime;
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unsigned int __pad2;
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compat_time_t msg_rtime;
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unsigned int __pad3;
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compat_time_t msg_ctime;
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unsigned int msg_stime_high;
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unsigned int msg_stime;
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unsigned int msg_rtime_high;
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unsigned int msg_rtime;
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unsigned int msg_ctime_high;
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unsigned int msg_ctime;
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unsigned int msg_cbytes;
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unsigned int msg_qnum;
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unsigned int msg_qbytes;
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@ -220,12 +220,12 @@ struct compat_msqid64_ds {
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struct compat_shmid64_ds {
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struct compat_ipc64_perm shm_perm;
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unsigned int __pad1;
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compat_time_t shm_atime;
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unsigned int __pad2;
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compat_time_t shm_dtime;
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unsigned int __pad3;
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compat_time_t shm_ctime;
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unsigned int shm_atime_high;
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unsigned int shm_atime;
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unsigned int shm_dtime_high;
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unsigned int shm_dtime;
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unsigned int shm_ctime_high;
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unsigned int shm_ctime;
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compat_size_t shm_segsz;
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compat_pid_t shm_cpid;
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compat_pid_t shm_lpid;
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@ -8,25 +8,22 @@
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* between kernel and user space.
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*
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* Pad space is left for:
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* - 64-bit time_t to solve y2038 problem
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* - 2 miscellaneous 32-bit values
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*/
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#if defined(__sparc__) && defined(__arch64__)
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# define PADDING(x)
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#else
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# define PADDING(x) unsigned int x;
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#endif
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struct msqid64_ds {
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struct ipc64_perm msg_perm;
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PADDING(__pad1)
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#if defined(__sparc__) && defined(__arch64__)
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__kernel_time_t msg_stime; /* last msgsnd time */
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PADDING(__pad2)
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__kernel_time_t msg_rtime; /* last msgrcv time */
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PADDING(__pad3)
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__kernel_time_t msg_ctime; /* last change time */
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#else
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unsigned long msg_stime_high;
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unsigned long msg_stime; /* last msgsnd time */
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unsigned long msg_rtime_high;
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unsigned long msg_rtime; /* last msgrcv time */
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unsigned long msg_ctime_high;
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unsigned long msg_ctime; /* last change time */
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#endif
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unsigned long msg_cbytes; /* current number of bytes on queue */
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unsigned long msg_qnum; /* number of messages in queue */
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unsigned long msg_qbytes; /* max number of bytes on queue */
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@ -35,5 +32,4 @@ struct msqid64_ds {
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unsigned long __unused1;
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unsigned long __unused2;
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};
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#undef PADDING
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#endif /* _SPARC_MSGBUF_H */
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@ -8,25 +8,23 @@
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* between kernel and user space.
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*
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* Pad space is left for:
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* - 64-bit time_t to solve y2038 problem
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* - 2 miscellaneous 32-bit values
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*/
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#if defined(__sparc__) && defined(__arch64__)
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# define PADDING(x)
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#else
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# define PADDING(x) unsigned int x;
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#endif
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struct semid64_ds {
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struct ipc64_perm sem_perm; /* permissions .. see ipc.h */
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PADDING(__pad1)
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#if defined(__sparc__) && defined(__arch64__)
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__kernel_time_t sem_otime; /* last semop time */
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PADDING(__pad2)
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__kernel_time_t sem_ctime; /* last change time */
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#else
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unsigned long sem_otime_high;
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unsigned long sem_otime; /* last semop time */
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unsigned long sem_ctime_high;
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unsigned long sem_ctime; /* last change time */
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#endif
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unsigned long sem_nsems; /* no. of semaphores in array */
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unsigned long __unused1;
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unsigned long __unused2;
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};
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#undef PADDING
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#endif /* _SPARC64_SEMBUF_H */
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@ -8,24 +8,23 @@
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* between kernel and user space.
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*
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* Pad space is left for:
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* - 64-bit time_t to solve y2038 problem
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* - 2 miscellaneous 32-bit values
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*/
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#if defined(__sparc__) && defined(__arch64__)
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# define PADDING(x)
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#else
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# define PADDING(x) unsigned int x;
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#endif
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struct shmid64_ds {
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struct ipc64_perm shm_perm; /* operation perms */
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PADDING(__pad1)
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#if defined(__sparc__) && defined(__arch64__)
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__kernel_time_t shm_atime; /* last attach time */
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PADDING(__pad2)
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__kernel_time_t shm_dtime; /* last detach time */
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PADDING(__pad3)
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__kernel_time_t shm_ctime; /* last change time */
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#else
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unsigned long shm_atime_high;
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unsigned long shm_atime; /* last attach time */
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unsigned long shm_dtime_high;
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unsigned long shm_dtime; /* last detach time */
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unsigned long shm_ctime_high;
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unsigned long shm_ctime; /* last change time */
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#endif
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size_t shm_segsz; /* size of segment (bytes) */
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__kernel_pid_t shm_cpid; /* pid of creator */
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__kernel_pid_t shm_lpid; /* pid of last operator */
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@ -46,6 +45,4 @@ struct shminfo64 {
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unsigned long __unused4;
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};
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#undef PADDING
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#endif /* _SPARC_SHMBUF_H */
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