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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2018-01-28 04:30:35 +0000
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2018-02-03 19:29:51 +0000
commit7cc754bc93eafa78695ec03bb0e4e8256d52c76d (patch)
treedc55c7555ce60aa779ea6e71c5856e4d6db74a6c /libc/sysdeps/linux/common/bits
parent8948296356072119a07c6b9435dc16bdc74bdc56 (diff)
bits/mman.h: consolidate header file
Sync with GNU C library and consolidate duplicate non architecture specific defines. MAP_UNINITIALIZED is only defined to 0x4000000 and used by the Linux kernel when CONFIG_MMAP_ALLOW_UNINITIALIZED is enabled. CONFIG_MMAP_ALLOW_UNINITIALIZED is only available for nommu. See Documentation/nommu-mmap.txt.
Diffstat (limited to 'libc/sysdeps/linux/common/bits')
-rw-r--r--libc/sysdeps/linux/common/bits/mman-common.h80
-rw-r--r--libc/sysdeps/linux/common/bits/mman-linux.h117
-rw-r--r--libc/sysdeps/linux/common/bits/mman-shared.h75
3 files changed, 196 insertions, 76 deletions
diff --git a/libc/sysdeps/linux/common/bits/mman-common.h b/libc/sysdeps/linux/common/bits/mman-common.h
index 5b20da4d0..ddd03a8d3 100644
--- a/libc/sysdeps/linux/common/bits/mman-common.h
+++ b/libc/sysdeps/linux/common/bits/mman-common.h
@@ -1,6 +1,5 @@
/* Definitions for POSIX memory map interface. Linux/generic version.
- Copyright (C) 1997,2000,2003,2005,2006,2009 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
+ Copyright (C) 1997-2018 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -23,36 +22,6 @@
/* The following definitions basically come from the kernel headers.
But the kernel header is not namespace clean. */
-
-/* Protections are chosen from these bits, OR'd together. The
- implementation does not necessarily support PROT_EXEC or PROT_WRITE
- without PROT_READ. The only guarantees are that no writing will be
- allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
-
-#define PROT_READ 0x1 /* Page can be read. */
-#define PROT_WRITE 0x2 /* Page can be written. */
-#define PROT_EXEC 0x4 /* Page can be executed. */
-#define PROT_NONE 0x0 /* Page can not be accessed. */
-#define PROT_GROWSDOWN 0x01000000 /* Extend change to start of
- growsdown vma (mprotect only). */
-#define PROT_GROWSUP 0x02000000 /* Extend change to start of
- growsup vma (mprotect only). */
-
-/* Sharing types (must choose one and only one of these). */
-#define MAP_SHARED 0x01 /* Share changes. */
-#define MAP_PRIVATE 0x02 /* Changes are private. */
-#ifdef __USE_MISC
-# define MAP_TYPE 0x0f /* Mask for type of mapping. */
-#endif
-
-/* Other flags. */
-#define MAP_FIXED 0x10 /* Interpret addr exactly. */
-#ifdef __USE_MISC
-# define MAP_FILE 0
-# define MAP_ANONYMOUS 0x20 /* Don't use a file. */
-# define MAP_ANON MAP_ANONYMOUS
-#endif
-
/* These are Linux-specific. */
#ifdef __USE_MISC
# define MAP_GROWSDOWN 0x00100 /* Stack-like segment. */
@@ -63,49 +32,8 @@
# define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */
# define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
# define MAP_STACK 0x20000 /* Allocation is for a stack. */
-# define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could
- be uninitialized. */
+# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
+# define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could - be uninitialized. */
#endif
-/* Flags to `msync'. */
-#define MS_ASYNC 1 /* Sync memory asynchronously. */
-#define MS_SYNC 4 /* Synchronous memory sync. */
-#define MS_INVALIDATE 2 /* Invalidate the caches. */
-
-/* Flags for `mlockall'. */
-#define MCL_CURRENT 1 /* Lock all currently mapped pages. */
-#define MCL_FUTURE 2 /* Lock all additions to address
- space. */
-
-/* Flags for `mremap'. */
-#ifdef __USE_GNU
-# define MREMAP_MAYMOVE 1
-# define MREMAP_FIXED 2
-#endif
-
-/* only define for MMU targets, no-MMU does not support madvise. */
-#ifdef __ARCH_USE_MMU__
-/* Advice to `madvise'. */
-# ifdef __USE_BSD
-# 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 /* Don't need these pages. */
-# define MADV_REMOVE 9 /* Remove these pages and resources. */
-# define MADV_DONTFORK 10 /* Do not inherit across fork. */
-# define MADV_DOFORK 11 /* Do inherit across fork. */
-# define MADV_MERGEABLE 12 /* KSM may merge identical pages. */
-# define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages. */
-# define MADV_HWPOISON 100 /* Poison a page for testing. */
-# endif
-
-/* The POSIX people had to invent similar names for the same things. */
-# ifdef __USE_XOPEN2K
-# define POSIX_MADV_NORMAL 0 /* No further special treatment. */
-# define POSIX_MADV_RANDOM 1 /* Expect random page references. */
-# define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */
-# define POSIX_MADV_WILLNEED 3 /* Will need these pages. */
-# define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */
-# endif
-#endif
+#include <bits/mman-linux.h>
diff --git a/libc/sysdeps/linux/common/bits/mman-linux.h b/libc/sysdeps/linux/common/bits/mman-linux.h
new file mode 100644
index 000000000..6ca08415a
--- /dev/null
+++ b/libc/sysdeps/linux/common/bits/mman-linux.h
@@ -0,0 +1,117 @@
+/* Definitions for POSIX memory map interface. Linux generic version.
+ Copyright (C) 2001-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_MMAN_H
+# error "Never use <bits/mman-linux.h> directly; include <sys/mman.h> instead."
+#endif
+
+/* The following definitions basically come from the kernel headers.
+ But the kernel header is not namespace clean. */
+
+
+/* Protections are chosen from these bits, OR'd together. The
+ implementation does not necessarily support PROT_EXEC or PROT_WRITE
+ without PROT_READ. The only guarantees are that no writing will be
+ allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
+
+#define PROT_READ 0x1 /* Page can be read. */
+#define PROT_WRITE 0x2 /* Page can be written. */
+#define PROT_EXEC 0x4 /* Page can be executed. */
+#define PROT_NONE 0x0 /* Page can not be accessed. */
+#define PROT_GROWSDOWN 0x01000000 /* Extend change to start of
+ growsdown vma (mprotect only). */
+#define PROT_GROWSUP 0x02000000 /* Extend change to start of
+ growsup vma (mprotect only). */
+
+/* Sharing types (must choose one and only one of these). */
+#define MAP_SHARED 0x01 /* Share changes. */
+#define MAP_PRIVATE 0x02 /* Changes are private. */
+#ifdef __USE_MISC
+# define MAP_TYPE 0x0f /* Mask for type of mapping. */
+#endif
+
+/* Other flags. */
+#define MAP_FIXED 0x10 /* Interpret addr exactly. */
+#ifdef __USE_MISC
+# define MAP_FILE 0
+# ifdef __MAP_ANONYMOUS
+# define MAP_ANONYMOUS __MAP_ANONYMOUS /* Don't use a file. */
+# else
+# define MAP_ANONYMOUS 0x20 /* Don't use a file. */
+# endif
+# define MAP_ANON MAP_ANONYMOUS
+/* When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. */
+# define MAP_HUGE_SHIFT 26
+# define MAP_HUGE_MASK 0x3f
+#endif
+
+/* Flags to `msync'. */
+#define MS_ASYNC 1 /* Sync memory asynchronously. */
+#define MS_SYNC 4 /* Synchronous memory sync. */
+#define MS_INVALIDATE 2 /* Invalidate the caches. */
+
+/* Flags for `mremap'. */
+#ifdef __USE_GNU
+# define MREMAP_MAYMOVE 1
+# define MREMAP_FIXED 2
+#endif
+
+/* only define for MMU targets, no-MMU does not support madvise. */
+#ifdef __ARCH_USE_MMU__
+/* Advice to `madvise'. */
+# ifdef __USE_MISC
+# 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 /* Don't need these pages. */
+# define MADV_FREE 8 /* Free pages only if memory pressure. */
+# define MADV_REMOVE 9 /* Remove these pages and resources. */
+# define MADV_DONTFORK 10 /* Do not inherit across fork. */
+# define MADV_DOFORK 11 /* Do inherit across fork. */
+# define MADV_MERGEABLE 12 /* KSM may merge identical pages. */
+# define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages. */
+# define MADV_HUGEPAGE 14 /* Worth backing with hugepages. */
+# define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages. */
+# define MADV_DONTDUMP 16 /* Explicity exclude from the core dump,
+ overrides the coredump filter bits. */
+# define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag. */
+# define MADV_WIPEONFORK 18 /* Zero memory on fork, child only. */
+# define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK. */
+# define MADV_HWPOISON 100 /* Poison a page for testing. */
+# endif
+
+/* The POSIX people had to invent similar names for the same things. */
+# ifdef __USE_XOPEN2K
+# define POSIX_MADV_NORMAL 0 /* No further special treatment. */
+# define POSIX_MADV_RANDOM 1 /* Expect random page references. */
+# define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */
+# define POSIX_MADV_WILLNEED 3 /* Will need these pages. */
+# define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */
+# endif
+#endif
+
+/* Flags for `mlockall'. */
+#ifndef MCL_CURRENT
+# define MCL_CURRENT 1 /* Lock all currently mapped pages. */
+# define MCL_FUTURE 2 /* Lock all additions to address
+ space. */
+# define MCL_ONFAULT 4 /* Lock all pages that are
+ faulted in. */
+#endif
+
+#include <bits/mman-shared.h>
diff --git a/libc/sysdeps/linux/common/bits/mman-shared.h b/libc/sysdeps/linux/common/bits/mman-shared.h
new file mode 100644
index 000000000..c40ae2d1e
--- /dev/null
+++ b/libc/sysdeps/linux/common/bits/mman-shared.h
@@ -0,0 +1,75 @@
+/* Memory-mapping-related declarations/definitions, not architecture-specific.
+ Copyright (C) 2017-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_MMAN_H
+# error "Never use <bits/mman-shared.h> directly; include <sys/mman.h> instead."
+#endif
+
+#ifdef __USE_GNU
+/* Flags for memfd_create. */
+# ifndef MFD_CLOEXEC
+# define MFD_CLOEXEC 1U
+# define MFD_ALLOW_SEALING 2U
+# define MFD_HUGETLB 4U
+# endif
+
+/* Flags for mlock2. */
+# ifndef MLOCK_ONFAULT
+# define MLOCK_ONFAULT 1U
+# endif
+
+/* Access rights for pkey_alloc. */
+# ifndef PKEY_DISABLE_ACCESS
+# define PKEY_DISABLE_ACCESS 0x1
+# define PKEY_DISABLE_WRITE 0x2
+# endif
+
+__BEGIN_DECLS
+
+/* Create a new memory file descriptor. NAME is a name for debugging.
+ FLAGS is a combination of the MFD_* constants. */
+int memfd_create (const char *__name, unsigned int __flags) __THROW;
+
+/* Lock pages from ADDR (inclusive) to ADDR + LENGTH (exclusive) into
+ memory. FLAGS is a combination of the MLOCK_* flags above. */
+int mlock2 (const void *__addr, size_t __length, unsigned int __flags) __THROW;
+
+/* Allocate a new protection key, with the PKEY_DISABLE_* bits
+ specified in ACCESS_RIGHTS. The protection key mask for the
+ current thread is updated to match the access privilege for the new
+ key. */
+int pkey_alloc (unsigned int __flags, unsigned int __access_rights) __THROW;
+
+/* Update the access rights for the current thread for KEY, which must
+ have been allocated using pkey_alloc. */
+int pkey_set (int __key, unsigned int __access_rights) __THROW;
+
+/* Return the access rights for the current thread for KEY, which must
+ have been allocated using pkey_alloc. */
+int pkey_get (int _key) __THROW;
+
+/* Free an allocated protection key, which must have been allocated
+ using pkey_alloc. */
+int pkey_free (int __key) __THROW;
+
+/* Apply memory protection flags for KEY to the specified address
+ range. */
+int pkey_mprotect (void *__addr, size_t __len, int __prot, int __pkey) __THROW;
+
+__END_DECLS
+
+#endif /* __USE_GNU */