xref: /aosp_15_r20/external/ltp/include/lapi/shmbuf.h (revision 49cdfc7efb34551c7342be41a7384b9c40d7cab7)

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2020 Linaro Limited. All rights reserved.
 * Author: Viresh Kumar <[email protected]>
 */

#ifndef LAPI_SHMBUF_H__
#define LAPI_SHMBUF_H__

#include "lapi/posix_types.h"
#include <sys/sem.h>
#include "tst_timer.h"
#include "ipcbuf.h"

#ifndef HAVE_STRUCT_SHMID64_DS

#if defined(__mips__)
#define HAVE_SHMID64_DS
/*
 * The shmid64_ds structure for the MIPS architecture.
 * Note extra padding because this structure is passed back and forth
 * between kernel and user space.
 *
 * As MIPS was lacking proper padding after shm_?time, we use 48 bits
 * of the padding at the end to store a few additional bits of the time.
 * libc implementations need to take care to convert this into a proper
 * data structure when moving to 64-bit time_t.
 */

#if __BITS_PER_LONG == 64
struct shmid64_ds {
	struct ipc64_perm	shm_perm;	/* operation perms */
	size_t			shm_segsz;	/* size of segment (bytes) */
	long			shm_atime;	/* last attach time */
	long			shm_dtime;	/* last detach time */
	long			shm_ctime;	/* last change time */
	__kernel_pid_t		shm_cpid;	/* pid of creator */
	__kernel_pid_t		shm_lpid;	/* pid of last operator */
	unsigned long		shm_nattch;	/* no. of current attaches */
	unsigned long		__unused1;
	unsigned long		__unused2;
};
#else
#define HAVE_SHMID64_DS_TIME_HIGH
struct shmid64_ds {
	struct ipc64_perm	shm_perm;	/* operation perms */
	size_t			shm_segsz;	/* size of segment (bytes) */
	unsigned long		shm_atime;	/* last attach time */
	unsigned long		shm_dtime;	/* last detach time */
	unsigned long		shm_ctime;	/* last change time */
	__kernel_pid_t		shm_cpid;	/* pid of creator */
	__kernel_pid_t		shm_lpid;	/* pid of last operator */
	unsigned long		shm_nattch;	/* no. of current attaches */
	unsigned short		shm_atime_high;
	unsigned short		shm_dtime_high;
	unsigned short		shm_ctime_high;
	unsigned short		__unused1;
};
#endif

#endif /* __mips__ */

#if defined(__hppa__)
#define HAVE_SHMID64_DS
/*
 * The shmid64_ds structure for parisc architecture.
 * Note extra padding because this structure is passed back and forth
 * between kernel and user space.
 *
 * Pad space is left for:
 * - 2 miscellaneous 32-bit values
 */

struct shmid64_ds {
	struct ipc64_perm	shm_perm;	/* operation perms */
#if __BITS_PER_LONG == 64
	long			shm_atime;	/* last attach time */
	long			shm_dtime;	/* last detach time */
	long			shm_ctime;	/* last change time */
#else
#define HAVE_SHMID64_DS_TIME_HIGH
	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 int		__pad4;
#endif
	__kernel_size_t		shm_segsz;	/* size of segment (bytes) */
	__kernel_pid_t		shm_cpid;	/* pid of creator */
	__kernel_pid_t		shm_lpid;	/* pid of last operator */
	unsigned long		shm_nattch;	/* no. of current attaches */
	unsigned long		__unused1;
	unsigned long		__unused2;
};
#endif /* __hppa__ */

#if defined(__powerpc__) || defined(__powerpc64__)
#define HAVE_SHMID64_DS
/*
 * The shmid64_ds structure for PPC architecture.
 *
 * Note extra padding because this structure is passed back and forth
 * between kernel and user space.
 *
 * Pad space is left for:
 * - 2 miscellaneous 32-bit values
 */

struct shmid64_ds {
	struct ipc64_perm	shm_perm;	/* operation perms */
#ifdef __powerpc64__
	long		shm_atime;	/* last attach time */
	long		shm_dtime;	/* last detach time */
	long		shm_ctime;	/* last change time */
#else
#define HAVE_SHMID64_DS_TIME_HIGH
	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) */
	__kernel_pid_t		shm_cpid;	/* pid of creator */
	__kernel_pid_t		shm_lpid;	/* pid of last operator */
	unsigned long		shm_nattch;	/* no. of current attaches */
	unsigned long		__unused5;
	unsigned long		__unused6;
};

#endif /* defined(__powerpc__) || defined(__powerpc64__) */

#if defined(__sparc__)
#define HAVE_SHMID64_DS
/*
 * The shmid64_ds structure for sparc architecture.
 * Note extra padding because this structure is passed back and forth
 * between kernel and user space.
 *
 * Pad space is left for:
 * - 2 miscellaneous 32-bit values
 */

struct shmid64_ds {
	struct ipc64_perm	shm_perm;	/* operation perms */
#if defined(__arch64__)
	long			shm_atime;	/* last attach time */
	long			shm_dtime;	/* last detach time */
	long			shm_ctime;	/* last change time */
#else
#define HAVE_SHMID64_DS_TIME_HIGH
	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 */
#endif
	size_t			shm_segsz;	/* size of segment (bytes) */
	__kernel_pid_t		shm_cpid;	/* pid of creator */
	__kernel_pid_t		shm_lpid;	/* pid of last operator */
	unsigned long		shm_nattch;	/* no. of current attaches */
	unsigned long		__unused1;
	unsigned long		__unused2;
};

#endif /* __sparc__ */

#if defined(__x86_64__) && defined(__ILP32__)
#define HAVE_SHMID64_DS
/*
 * The shmid64_ds structure for x86 architecture with x32 ABI.
 *
 * On x86-32 and x86-64 we can just use the generic definition, but
 * x32 uses the same binary layout as x86_64, which is differnet
 * from other 32-bit architectures.
 */

struct shmid64_ds {
	struct ipc64_perm	shm_perm;	/* operation perms */
	size_t			shm_segsz;	/* size of segment (bytes) */
	__kernel_long_t		shm_atime;	/* last attach time */
	__kernel_long_t		shm_dtime;	/* last detach time */
	__kernel_long_t		shm_ctime;	/* last change time */
	__kernel_pid_t		shm_cpid;	/* pid of creator */
	__kernel_pid_t		shm_lpid;	/* pid of last operator */
	__kernel_ulong_t	shm_nattch;	/* no. of current attaches */
	__kernel_ulong_t	__unused4;
	__kernel_ulong_t	__unused5;
};
#endif /* defined(__x86_64__) && defined(__ILP32__) */

#if defined(__xtensa__)
#define HAVE_SHMID64_DS
#define HAVE_SHMID64_DS_TIME_HIGH
/*
 * The shmid64_ds structure for Xtensa architecture.
 * Note extra padding because this structure is passed back and forth
 * between kernel and user space, but the padding is on the wrong
 * side for big-endian xtensa, for historic reasons.
 *
 * Pad space is left for:
 * - 2 miscellaneous 32-bit values
 */

struct shmid64_ds {
	struct ipc64_perm	shm_perm;	/* operation perms */
	size_t			shm_segsz;	/* size of segment (bytes) */
	unsigned long		shm_atime;	/* last attach time */
	unsigned long		shm_atime_high;
	unsigned long		shm_dtime;	/* last detach time */
	unsigned long		shm_dtime_high;
	unsigned long		shm_ctime;	/* last change time */
	unsigned long		shm_ctime_high;
	__kernel_pid_t		shm_cpid;	/* pid of creator */
	__kernel_pid_t		shm_lpid;	/* pid of last operator */
	unsigned long		shm_nattch;	/* no. of current attaches */
	unsigned long		__unused4;
	unsigned long		__unused5;
};

#endif /* __xtensa__ */

#ifndef HAVE_SHMID64_DS
/*
 * The shmid64_ds structure for most architectures (though it came
 * from x86_32 originally). Note extra padding because this structure
 * is passed back and forth between kernel and user space.
 *
 * shmid64_ds was originally meant to be architecture specific, but
 * everyone just ended up making identical copies without specific
 * optimizations, so we may just as well all use the same one.
 *
 * 64 bit architectures use a 64-bit long time field here, while
 * 32 bit architectures have a pair of unsigned long values.
 * On big-endian systems, the lower half is in the wrong place.
 *
 *
 * Pad space is left for:
 * - 2 miscellaneous 32-bit values
 */

struct shmid64_ds {
	struct ipc64_perm	shm_perm;	/* operation perms */
	size_t			shm_segsz;	/* size of segment (bytes) */
#if __BITS_PER_LONG == 64
	long			shm_atime;	/* last attach time */
	long			shm_dtime;	/* last detach time */
	long			shm_ctime;	/* last change time */
#else
#define HAVE_SHMID64_DS_TIME_HIGH
	unsigned long		shm_atime;	/* last attach time */
	unsigned long		shm_atime_high;
	unsigned long		shm_dtime;	/* last detach time */
	unsigned long		shm_dtime_high;
	unsigned long		shm_ctime;	/* last change time */
	unsigned long		shm_ctime_high;
#endif
	__kernel_pid_t		shm_cpid;	/* pid of creator */
	__kernel_pid_t		shm_lpid;	/* pid of last operator */
	unsigned long		shm_nattch;	/* no. of current attaches */
	unsigned long		__unused4;
	unsigned long		__unused5;
};
#endif /* shmid64_ds */

#endif /* HAVE_SHMID64_DS */

#endif /* LAPI_SHMBUF_H__ */