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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/i386
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/i386')
-rw-r--r--libc/sysdeps/linux/i386/bits/mman.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/i386/bits/mman.h b/libc/sysdeps/linux/i386/bits/mman.h
new file mode 100644
index 000000000..64fee2206
--- /dev/null
+++ b/libc/sysdeps/linux/i386/bits/mman.h
@@ -0,0 +1,44 @@
+/* Definitions for POSIX memory map interface. Linux/x86 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.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. */
+
+/* Other flags. */
+#ifdef __USE_MISC
+# define MAP_32BIT 0x40 /* Only give out 32-bit addresses. */
+#endif
+
+/* These are Linux-specific. */
+#ifdef __USE_MISC
+# define MAP_GROWSDOWN 0x00100 /* Stack-like segment. */
+# define MAP_DENYWRITE 0x00800 /* ETXTBSY */
+# define MAP_EXECUTABLE 0x01000 /* Mark it as an executable. */
+# define MAP_LOCKED 0x02000 /* Lock the mapping. */
+# define MAP_NORESERVE 0x04000 /* Don't check for reservations. */
+# 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_HUGETLB 0x40000 /* Create huge page mapping. */
+#endif
+
+/* Include generic Linux declarations. */
+#include <bits/mman-linux.h>