[PATCH 1/2] rtems: add sys/mman.h

Gedare Bloom gedare at rtems.org
Mon Aug 1 20:00:53 UTC 2016


This mman.h is copied verbatim from the upstream freebsd sources
pulled from the freebsd-org submodule used by rtems for the
rtems-libbsd project: https://git.rtems.org/rtems-libbsd/tree/

On Mon, Aug 1, 2016 at 3:55 PM, Gedare Bloom <gedare at rtems.org> wrote:
> ---
>  newlib/libc/sys/rtems/include/sys/mman.h | 263 +++++++++++++++++++++++++++++++
>  1 file changed, 263 insertions(+)
>  create mode 100644 newlib/libc/sys/rtems/include/sys/mman.h
>
> diff --git a/newlib/libc/sys/rtems/include/sys/mman.h b/newlib/libc/sys/rtems/include/sys/mman.h
> new file mode 100644
> index 0000000..e7e5cf4
> --- /dev/null
> +++ b/newlib/libc/sys/rtems/include/sys/mman.h
> @@ -0,0 +1,263 @@
> +/*-
> + * Copyright (c) 1982, 1986, 1993
> + *     The Regents of the University of California.  All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + *    notice, this list of conditions and the following disclaimer.
> + * 2. Redistributions in binary form must reproduce the above copyright
> + *    notice, this list of conditions and the following disclaimer in the
> + *    documentation and/or other materials provided with the distribution.
> + * 4. Neither the name of the University nor the names of its contributors
> + *    may be used to endorse or promote products derived from this software
> + *    without specific prior written permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> + * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
> + * SUCH DAMAGE.
> + *
> + *     @(#)mman.h      8.2 (Berkeley) 1/9/95
> + * $FreeBSD$
> + */
> +
> +#ifndef _SYS_MMAN_H_
> +#define _SYS_MMAN_H_
> +
> +#include <sys/cdefs.h>
> +#include <sys/_types.h>
> +
> +#if __BSD_VISIBLE
> +/*
> + * Inheritance for minherit()
> + */
> +#define INHERIT_SHARE  0
> +#define INHERIT_COPY   1
> +#define INHERIT_NONE   2
> +#endif
> +
> +/*
> + * Protections are chosen from these bits, or-ed together
> + */
> +#define        PROT_NONE       0x00    /* no permissions */
> +#define        PROT_READ       0x01    /* pages can be read */
> +#define        PROT_WRITE      0x02    /* pages can be written */
> +#define        PROT_EXEC       0x04    /* pages can be executed */
> +
> +/*
> + * Flags contain sharing type and options.
> + * Sharing types; choose one.
> + */
> +#define        MAP_SHARED      0x0001          /* share changes */
> +#define        MAP_PRIVATE     0x0002          /* changes are private */
> +#if __BSD_VISIBLE
> +#define        MAP_COPY        MAP_PRIVATE     /* Obsolete */
> +#endif
> +
> +/*
> + * Other flags
> + */
> +#define        MAP_FIXED        0x0010 /* map addr must be exactly as requested */
> +
> +#if __BSD_VISIBLE
> +#define        MAP_RENAME       0x0020 /* Sun: rename private pages to file */
> +#define        MAP_NORESERVE    0x0040 /* Sun: don't reserve needed swap area */
> +#define        MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */
> +#define        MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */
> +#define        MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
> +#define        MAP_STACK        0x0400 /* region grows down, like a stack */
> +#define        MAP_NOSYNC       0x0800 /* page to but do not sync underlying file */
> +
> +/*
> + * Mapping type
> + */
> +#define        MAP_FILE         0x0000 /* map from file (default) */
> +#define        MAP_ANON         0x1000 /* allocated from memory, swap space */
> +#ifndef _KERNEL
> +#define        MAP_ANONYMOUS    MAP_ANON /* For compatibility. */
> +#endif /* !_KERNEL */
> +
> +/*
> + * Extended flags
> + */
> +#define        MAP_NOCORE       0x00020000 /* dont include these pages in a coredump */
> +#define        MAP_PREFAULT_READ 0x00040000 /* prefault mapping for reading */
> +
> +/*
> + * Request specific alignment (n == log2 of the desired alignment).
> + *
> + * MAP_ALIGNED_SUPER requests optimal superpage alignment, but does
> + * not enforce a specific alignment.
> + */
> +#define        MAP_ALIGNED(n)   ((n) << MAP_ALIGNMENT_SHIFT)
> +#define        MAP_ALIGNMENT_SHIFT     24
> +#define        MAP_ALIGNMENT_MASK      MAP_ALIGNED(0xff)
> +#define        MAP_ALIGNED_SUPER       MAP_ALIGNED(1) /* align on a superpage */
> +#endif /* __BSD_VISIBLE */
> +
> +#if __POSIX_VISIBLE >= 199309
> +/*
> + * Process memory locking
> + */
> +#define MCL_CURRENT    0x0001  /* Lock only current memory */
> +#define MCL_FUTURE     0x0002  /* Lock all future memory as well */
> +#endif
> +
> +/*
> + * Error return from mmap()
> + */
> +#define MAP_FAILED     ((void *)-1)
> +
> +/*
> + * msync() flags
> + */
> +#define        MS_SYNC         0x0000  /* msync synchronously */
> +#define MS_ASYNC       0x0001  /* return immediately */
> +#define MS_INVALIDATE  0x0002  /* invalidate all cached data */
> +
> +/*
> + * Advice to madvise
> + */
> +#define        _MADV_NORMAL    0       /* no further special treatment */
> +#define        _MADV_RANDOM    1       /* expect random page references */
> +#define        _MADV_SEQUENTIAL 2      /* expect sequential page references */
> +#define        _MADV_WILLNEED  3       /* will need these pages */
> +#define        _MADV_DONTNEED  4       /* dont need these pages */
> +
> +#if __BSD_VISIBLE
> +#define        MADV_NORMAL     _MADV_NORMAL
> +#define        MADV_RANDOM     _MADV_RANDOM
> +#define        MADV_SEQUENTIAL _MADV_SEQUENTIAL
> +#define        MADV_WILLNEED   _MADV_WILLNEED
> +#define        MADV_DONTNEED   _MADV_DONTNEED
> +#define        MADV_FREE       5       /* dont need these pages, and junk contents */
> +#define        MADV_NOSYNC     6       /* try to avoid flushes to physical media */
> +#define        MADV_AUTOSYNC   7       /* revert to default flushing strategy */
> +#define        MADV_NOCORE     8       /* do not include these pages in a core file */
> +#define        MADV_CORE       9       /* revert to including pages in a core file */
> +#define        MADV_PROTECT    10      /* protect process from pageout kill */
> +
> +/*
> + * Return bits from mincore
> + */
> +#define        MINCORE_INCORE           0x1 /* Page is incore */
> +#define        MINCORE_REFERENCED       0x2 /* Page has been referenced by us */
> +#define        MINCORE_MODIFIED         0x4 /* Page has been modified by us */
> +#define        MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
> +#define        MINCORE_MODIFIED_OTHER  0x10 /* Page has been modified */
> +#define        MINCORE_SUPER           0x20 /* Page is a "super" page */
> +
> +/*
> + * Anonymous object constant for shm_open().
> + */
> +#define        SHM_ANON                ((char *)1)
> +#endif /* __BSD_VISIBLE */
> +
> +/*
> + * XXX missing POSIX_TYPED_MEM_* macros and
> + * posix_typed_mem_info structure.
> + */
> +#if __POSIX_VISIBLE >= 200112
> +#define        POSIX_MADV_NORMAL       _MADV_NORMAL
> +#define        POSIX_MADV_RANDOM       _MADV_RANDOM
> +#define        POSIX_MADV_SEQUENTIAL   _MADV_SEQUENTIAL
> +#define        POSIX_MADV_WILLNEED     _MADV_WILLNEED
> +#define        POSIX_MADV_DONTNEED     _MADV_DONTNEED
> +#endif
> +
> +#ifndef _MODE_T_DECLARED
> +typedef        __mode_t        mode_t;
> +#define        _MODE_T_DECLARED
> +#endif
> +
> +#ifndef _OFF_T_DECLARED
> +typedef        __off_t         off_t;
> +#define        _OFF_T_DECLARED
> +#endif
> +
> +#ifndef _SIZE_T_DECLARED
> +typedef        __size_t        size_t;
> +#define        _SIZE_T_DECLARED
> +#endif
> +
> +#if defined(_KERNEL) || defined(_WANT_FILE)
> +#include <vm/vm.h>
> +
> +struct file;
> +
> +struct shmfd {
> +       size_t          shm_size;
> +       vm_object_t     shm_object;
> +       int             shm_refs;
> +       uid_t           shm_uid;
> +       gid_t           shm_gid;
> +       mode_t          shm_mode;
> +       int             shm_kmappings;
> +
> +       /*
> +        * Values maintained solely to make this a better-behaved file
> +        * descriptor for fstat() to run on.
> +        */
> +       struct timespec shm_atime;
> +       struct timespec shm_mtime;
> +       struct timespec shm_ctime;
> +       struct timespec shm_birthtime;
> +       ino_t           shm_ino;
> +
> +       struct label    *shm_label;             /* MAC label */
> +       const char      *shm_path;
> +};
> +#endif
> +
> +#ifdef _KERNEL
> +int    shm_mmap(struct shmfd *shmfd, vm_size_t objsize, vm_ooffset_t foff,
> +           vm_object_t *obj);
> +int    shm_map(struct file *fp, size_t size, off_t offset, void **memp);
> +int    shm_unmap(struct file *fp, void *mem, size_t size);
> +void   shm_path(struct shmfd *shmfd, char *path, size_t size);
> +
> +#else /* !_KERNEL */
> +
> +__BEGIN_DECLS
> +/*
> + * XXX not yet implemented: posix_mem_offset(), posix_typed_mem_get_info(),
> + * posix_typed_mem_open().
> + */
> +#if __BSD_VISIBLE
> +int    getpagesizes(size_t *, int);
> +int    madvise(void *, size_t, int);
> +int    mincore(const void *, size_t, char *);
> +int    minherit(void *, size_t, int);
> +#endif
> +int    mlock(const void *, size_t);
> +#ifndef _MMAP_DECLARED
> +#define        _MMAP_DECLARED
> +void * mmap(void *, size_t, int, int, int, off_t);
> +#endif
> +int    mprotect(const void *, size_t, int);
> +int    msync(void *, size_t, int);
> +int    munlock(const void *, size_t);
> +int    munmap(void *, size_t);
> +#if __POSIX_VISIBLE >= 200112
> +int    posix_madvise(void *, size_t, int);
> +#endif
> +#if __POSIX_VISIBLE >= 199309
> +int    mlockall(int);
> +int    munlockall(void);
> +int    shm_open(const char *, int, mode_t);
> +int    shm_unlink(const char *);
> +#endif
> +__END_DECLS
> +
> +#endif /* !_KERNEL */
> +
> +#endif /* !_SYS_MMAN_H_ */
> --
> 1.9.1
>


More information about the devel mailing list