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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f69c97f6a4
parisc, 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, parisc 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>
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _PARISC_SHMBUF_H
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#define _PARISC_SHMBUF_H
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#include <asm/bitsperlong.h>
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/*
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* The shmid64_ds structure for parisc architecture.
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* Note extra padding because this structure is passed back and forth
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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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* - 2 miscellaneous 32-bit values
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*/
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struct shmid64_ds {
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struct ipc64_perm shm_perm; /* operation perms */
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#if __BITS_PER_LONG == 64
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__kernel_time_t shm_atime; /* last attach time */
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__kernel_time_t shm_dtime; /* last detach time */
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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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unsigned int __pad4;
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#endif
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__kernel_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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unsigned long shm_nattch; /* no. of current attaches */
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unsigned long __unused1;
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unsigned long __unused2;
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};
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struct shminfo64 {
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unsigned long shmmax;
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unsigned long shmmin;
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unsigned long shmmni;
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unsigned long shmseg;
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unsigned long shmall;
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unsigned long __unused1;
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unsigned long __unused2;
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unsigned long __unused3;
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unsigned long __unused4;
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};
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#endif /* _PARISC_SHMBUF_H */
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