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Backport of this upstream commit, with ports/ readded to the path.
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commit 5c40c3bab2fddaca8cfe12d75944d1fef8adf1a4
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Author: Alan Hayward <alan.hayward@arm.com>
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Date: Tue Nov 11 16:32:34 2014 +0000
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[AArch64] Add ipc.h.
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Adding ipc.h for AArch64 adjusted to behave correctly on big endian
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targets.
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diff --git a/ports/sysdeps/unix/sysv/linux/aarch64/bits/ipc.h b/ports/sysdeps/unix/sysv/linux/aarch64/bits/ipc.h
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new file mode 100644
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index 0000000..aa50eb0
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--- /dev/null
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+++ b/ports/sysdeps/unix/sysv/linux/aarch64/bits/ipc.h
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@@ -0,0 +1,54 @@
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+/* Copyright (C) 1995-2014 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#ifndef _SYS_IPC_H
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+# error "Never use <bits/ipc.h> directly; include <sys/ipc.h> instead."
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+#endif
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+
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+#include <bits/types.h>
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+
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+/* Mode bits for `msgget', `semget', and `shmget'. */
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+#define IPC_CREAT 01000 /* Create key if key does not exist. */
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+#define IPC_EXCL 02000 /* Fail if key exists. */
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+#define IPC_NOWAIT 04000 /* Return error on wait. */
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+
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+/* Control commands for `msgctl', `semctl', and `shmctl'. */
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+#define IPC_RMID 0 /* Remove identifier. */
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+#define IPC_SET 1 /* Set `ipc_perm' options. */
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+#define IPC_STAT 2 /* Get `ipc_perm' options. */
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+#ifdef __USE_GNU
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+# define IPC_INFO 3 /* See ipcs. */
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+#endif
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+
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+/* Special key values. */
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+#define IPC_PRIVATE ((__key_t) 0) /* Private key. */
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+
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+
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+/* Data structure used to pass permission information to IPC operations. */
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+struct ipc_perm
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+ {
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+ __key_t __key; /* Key. */
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+ __uid_t uid; /* Owner's user ID. */
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+ __gid_t gid; /* Owner's group ID. */
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+ __uid_t cuid; /* Creator's user ID. */
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+ __gid_t cgid; /* Creator's group ID. */
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+ unsigned int mode; /* Read/write permission. */
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+ unsigned short int __seq; /* Sequence number. */
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+ unsigned short int __pad1;
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+ __syscall_ulong_t __glibc_reserved1;
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+ __syscall_ulong_t __glibc_reserved2;
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+ };
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