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y2038: powerpc: Extend sysvipc data structures

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powerpc, 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.

powerpc has the same definition as parisc and sparc, but now also
supports little-endian mode, which is now wrong because the
padding is made for big-endian user space.

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>
This commit is contained in:
Arnd Bergmann
2015-05-05 23:19:43 +02:00
parent 91b9b0d718
commit d0b67de998
4 changed files with 40 additions and 43 deletions
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18
arch/powerpc/include/uapi/asm/msgbuf.h
View File

@@ -10,18 +10,18 @@
struct msqid64_ds {
struct ipc64_perm msg_perm;
#ifndef __powerpc64__
unsigned int __unused1;
#endif
#ifdef __powerpc64__
__kernel_time_t msg_stime; /* last msgsnd time */
#ifndef __powerpc64__
unsigned int __unused2;
#endif
__kernel_time_t msg_rtime; /* last msgrcv time */
#ifndef __powerpc64__
unsigned int __unused3;
#endif
__kernel_time_t msg_ctime; /* last change time */
#else
unsigned long msg_stime_high;
unsigned long msg_stime; /* last msgsnd time */
unsigned long msg_rtime_high;
unsigned long msg_rtime; /* last msgrcv time */
unsigned long msg_ctime_high;
unsigned long msg_ctime; /* last change time */
#endif
unsigned long msg_cbytes; /* current number of bytes on queue */
unsigned long msg_qnum; /* number of messages in queue */
unsigned long msg_qbytes; /* max number of bytes on queue */

14
arch/powerpc/include/uapi/asm/sembuf.h
View File

@@ -15,20 +15,20 @@
* between kernel and user space.
*
* Pad space is left for:
* - 64-bit time_t to solve y2038 problem
* - 2 miscellaneous 32-bit values
* - 2 miscellaneous 32/64-bit values
*/
struct semid64_ds {
struct ipc64_perm sem_perm; /* permissions .. see ipc.h */
#ifndef __powerpc64__
unsigned long __unused1;
#endif
unsigned long sem_otime_high;
unsigned long sem_otime; /* last semop time */
unsigned long sem_ctime_high;
unsigned long sem_ctime; /* last change time */
#else
__kernel_time_t sem_otime; /* last semop time */
#ifndef __powerpc64__
unsigned long __unused2;
#endif
__kernel_time_t sem_ctime; /* last change time */
#endif
unsigned long sem_nsems; /* no. of semaphores in array */
unsigned long __unused3;
unsigned long __unused4;

19
arch/powerpc/include/uapi/asm/shmbuf.h
View File

@@ -16,25 +16,22 @@
* between kernel and user space.
*
* Pad space is left for:
* - 64-bit time_t to solve y2038 problem
* - 2 miscellaneous 32-bit values
*/
struct shmid64_ds {
struct ipc64_perm shm_perm; /* operation perms */
#ifndef __powerpc64__
unsigned long __unused1;
#endif
#ifdef __powerpc64__
__kernel_time_t shm_atime; /* last attach time */
#ifndef __powerpc64__
unsigned long __unused2;
#endif
__kernel_time_t shm_dtime; /* last detach time */
#ifndef __powerpc64__
unsigned long __unused3;
#endif
__kernel_time_t shm_ctime; /* last change time */
#ifndef __powerpc64__
#else
unsigned long shm_atime_high;
unsigned long shm_atime; /* last attach time */
unsigned long shm_dtime_high;
unsigned long shm_dtime; /* last detach time */
unsigned long shm_ctime_high;
unsigned long shm_ctime; /* last change time */
unsigned long __unused4;
#endif
size_t shm_segsz; /* size of segment (bytes) */