mman.h 3.7 KB

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  1. /* Cloned for uClibc by Paul Mundt, December 2003 */
  2. /* Modified by SuperH, Inc. September 2003 */
  3. /* Definitions for POSIX memory map interface. Linux/SH version.
  4. Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
  5. This file is part of the GNU C Library.
  6. The GNU C Library is free software; you can redistribute it and/or
  7. modify it under the terms of the GNU Library General Public License as
  8. published by the Free Software Foundation; either version 2 of the
  9. License, or (at your option) any later version.
  10. The GNU C Library is distributed in the hope that it will be useful,
  11. but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13. Library General Public License for more details.
  14. You should have received a copy of the GNU Library General Public
  15. License along with the GNU C Library; see the file COPYING.LIB. If not,
  16. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17. Boston, MA 02111-1307, USA. */
  18. #ifndef _SYS_MMAN_H
  19. # error "Never include this file directly. Use <sys/mman.h> instead"
  20. #endif
  21. /* The following definitions basically come from the kernel headers.
  22. But the kernel header is not namespace clean. */
  23. /* Protections are chosen from these bits, OR'd together. The
  24. implementation does not necessarily support PROT_EXEC or PROT_WRITE
  25. without PROT_READ. The only guarantees are that no writing will be
  26. allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
  27. #define PROT_READ 0x1 /* Page can be read. */
  28. #define PROT_WRITE 0x2 /* Page can be written. */
  29. #define PROT_EXEC 0x4 /* Page can be executed. */
  30. #define PROT_NONE 0x0 /* Page can not be accessed. */
  31. /* Sharing types (must choose one and only one of these). */
  32. #define MAP_SHARED 0x01 /* Share changes. */
  33. #define MAP_PRIVATE 0x02 /* Changes are private. */
  34. #ifdef __USE_MISC
  35. # define MAP_TYPE 0x0f /* Mask for type of mapping. */
  36. #endif
  37. /* Other flags. */
  38. #define MAP_FIXED 0x10 /* Interpret addr exactly. */
  39. #ifdef __USE_MISC
  40. # define MAP_FILE 0
  41. # define MAP_ANONYMOUS 0x20 /* Don't use a file. */
  42. # define MAP_ANON MAP_ANONYMOUS
  43. #endif
  44. /* These are Linux-specific. */
  45. #ifdef __USE_MISC
  46. # define MAP_GROWSDOWN 0x0100 /* Stack-like segment. */
  47. # define MAP_DENYWRITE 0x0800 /* ETXTBSY */
  48. # define MAP_EXECUTABLE 0x1000 /* Mark it as an executable. */
  49. # define MAP_LOCKED 0x2000 /* Lock the mapping. */
  50. # define MAP_NORESERVE 0x4000 /* Don't check for reservations. */
  51. #endif
  52. /* Flags to `msync'. */
  53. #define MS_ASYNC 1 /* Sync memory asynchronously. */
  54. #define MS_SYNC 4 /* Synchronous memory sync. */
  55. #define MS_INVALIDATE 2 /* Invalidate the caches. */
  56. /* Flags for `mlockall'. */
  57. #define MCL_CURRENT 1 /* Lock all currently mapped pages. */
  58. #define MCL_FUTURE 2 /* Lock all additions to address
  59. space. */
  60. /* Flags for `mremap'. */
  61. #ifdef __USE_GNU
  62. # define MREMAP_MAYMOVE 1
  63. #endif
  64. /* Advice to `madvise'. */
  65. #ifdef __USE_BSD
  66. # define MADV_NORMAL 0 /* No further special treatment. */
  67. # define MADV_RANDOM 1 /* Expect random page references. */
  68. # define MADV_SEQUENTIAL 2 /* Expect sequential page references. */
  69. # define MADV_WILLNEED 3 /* Will need these pages. */
  70. # define MADV_DONTNEED 4 /* Don't need these pages. */
  71. #endif
  72. /* The POSIX people had to invent similar names for the same things. */
  73. #ifdef __USE_XOPEN2K
  74. # define POSIX_MADV_NORMAL 0 /* No further special treatment. */
  75. # define POSIX_MADV_RANDOM 1 /* Expect random page references. */
  76. # define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */
  77. # define POSIX_MADV_WILLNEED 3 /* Will need these pages. */
  78. # define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */
  79. #endif