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authorMarkos Chandras <markos.chandras@imgtec.com>2008-02-05 14:51:48 +0000
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2013-03-14 22:45:15 +0100
commit22686a1383c4a4a319eaaa6b16b1a9540114bd66 (patch)
tree04e12086f9187c150ba6a33db0368b9903e50363 /libc/sysdeps
parent37439e66a31f251eba39604885f57099a43d943d (diff)
Add support for the Meta architecture
Meta cores are 32-bit, hardware multithreaded, general purpose, embedded processors which also feature a DSP instruction set, and can be found in many digital radios. They are capable of running different operating systems on different hardware threads, for example a digital radio might run RTOSes for DAB decoding and audio decoding on 3 hardware threads, and run Linux on the 4th hardware thread to manage the user interface, networking etc. HTPs are also capable of running SMP Linux on multiple hardware threads. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/sysdeps')
-rw-r--r--libc/sysdeps/linux/metag/Makefile13
-rw-r--r--libc/sysdeps/linux/metag/Makefile.arch10
-rw-r--r--libc/sysdeps/linux/metag/__syscall_error.c18
-rw-r--r--libc/sysdeps/linux/metag/_longjmp.S25
-rw-r--r--libc/sysdeps/linux/metag/bits/endian.h12
-rw-r--r--libc/sysdeps/linux/metag/bits/fcntl.h238
-rw-r--r--libc/sysdeps/linux/metag/bits/ipc.h55
-rw-r--r--libc/sysdeps/linux/metag/bits/kernel_types.h45
-rw-r--r--libc/sysdeps/linux/metag/bits/profil-counter.h17
-rw-r--r--libc/sysdeps/linux/metag/bits/setjmp.h44
-rw-r--r--libc/sysdeps/linux/metag/bits/sigcontextinfo.h14
-rw-r--r--libc/sysdeps/linux/metag/bits/stackinfo.h28
-rw-r--r--libc/sysdeps/linux/metag/bits/syscalls.h99
-rw-r--r--libc/sysdeps/linux/metag/bits/uClibc_arch_features.h46
-rw-r--r--libc/sysdeps/linux/metag/bits/wordsize.h19
-rw-r--r--libc/sysdeps/linux/metag/brk.c38
-rw-r--r--libc/sysdeps/linux/metag/clone.S65
-rw-r--r--libc/sysdeps/linux/metag/crt1.S76
-rw-r--r--libc/sysdeps/linux/metag/crti.S19
-rw-r--r--libc/sysdeps/linux/metag/crtn.S19
-rw-r--r--libc/sysdeps/linux/metag/metag.c10
-rw-r--r--libc/sysdeps/linux/metag/setjmp.S52
-rw-r--r--libc/sysdeps/linux/metag/sys/io.h48
-rw-r--r--libc/sysdeps/linux/metag/sys/procfs.h121
-rw-r--r--libc/sysdeps/linux/metag/sys/ucontext.h96
-rw-r--r--libc/sysdeps/linux/metag/sys/user.h7
-rw-r--r--libc/sysdeps/linux/metag/syscall.c40
27 files changed, 1274 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/metag/Makefile b/libc/sysdeps/linux/metag/Makefile
new file mode 100644
index 000000000..94b43e117
--- /dev/null
+++ b/libc/sysdeps/linux/metag/Makefile
@@ -0,0 +1,13 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
+#
+# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+#
+
+top_srcdir=../../../../
+top_builddir=../../../../
+all: objs
+include $(top_builddir)Rules.mak
+include Makefile.arch
+include $(top_srcdir)Makerules
diff --git a/libc/sysdeps/linux/metag/Makefile.arch b/libc/sysdeps/linux/metag/Makefile.arch
new file mode 100644
index 000000000..0e6fbfe12
--- /dev/null
+++ b/libc/sysdeps/linux/metag/Makefile.arch
@@ -0,0 +1,10 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2013 Imagination Technologies Ltd.
+#
+# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+#
+
+CSRC-y := brk.c syscall.c metag.c __syscall_error.c
+
+SSRC-y := _longjmp.S clone.S setjmp.S
diff --git a/libc/sysdeps/linux/metag/__syscall_error.c b/libc/sysdeps/linux/metag/__syscall_error.c
new file mode 100644
index 000000000..f97cd0126
--- /dev/null
+++ b/libc/sysdeps/linux/metag/__syscall_error.c
@@ -0,0 +1,18 @@
+/* Wrapper for setting errno.
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <errno.h>
+#include <features.h>
+
+/* This routine is jumped to by all the syscall handlers, to stash
+ * an error number into errno. */
+int __syscall_error(int err_no) attribute_hidden;
+int __syscall_error(int err_no)
+{
+ __set_errno(-err_no);
+ return -1;
+}
diff --git a/libc/sysdeps/linux/metag/_longjmp.S b/libc/sysdeps/linux/metag/_longjmp.S
new file mode 100644
index 000000000..54bc71c36
--- /dev/null
+++ b/libc/sysdeps/linux/metag/_longjmp.S
@@ -0,0 +1,25 @@
+! Copyright (C) 2013 Imagination Technologies Ltd.
+
+! Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+
+ .text
+ .global ___longjmp
+ .type ___longjmp,function
+
+___longjmp:
+ !! If val is 0, set it to 1
+ CMP D0Ar2,#0
+ ADDZ D0Ar2,D0Ar2,#1
+
+ !! Restore A0/A1 regs
+ MGETL A0.0,A0.1,[D1Ar1++]
+ !! Restore D0/D1 regs
+ MOV A0.3,D1Ar1
+ MGETL D0FrT,D0.5,D0.6,D0.7,[A0.3++]
+ !! Move 2nd argument to return value
+ MOV D0Re0,D0Ar2
+ MOV PC,D1RtP
+ .size ___longjmp,.-___longjmp
+
+libc_hidden_def(__longjmp)
diff --git a/libc/sysdeps/linux/metag/bits/endian.h b/libc/sysdeps/linux/metag/bits/endian.h
new file mode 100644
index 000000000..af99901a7
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/endian.h
@@ -0,0 +1,12 @@
+/* Meta is little endian
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _ENDIAN_H
+# error "Never use <bits/endian.h> directly; include <endian.h> instead."
+#endif
+
+#define __BYTE_ORDER __LITTLE_ENDIAN
diff --git a/libc/sysdeps/linux/metag/bits/fcntl.h b/libc/sysdeps/linux/metag/bits/fcntl.h
new file mode 100644
index 000000000..c4f641b7e
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/fcntl.h
@@ -0,0 +1,238 @@
+/* O_*, F_*, FD_* bit values for Linux.
+ Copyright (C) 1995-1998, 2000, 2004, 2006, 2007, 2008
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FCNTL_H
+# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
+#endif
+
+#include <sys/types.h>
+#ifdef __USE_GNU
+# include <bits/uio.h>
+#endif
+
+
+/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
+ located on an ext2 file system */
+#define O_ACCMODE 0003
+#define O_RDONLY 00
+#define O_WRONLY 01
+#define O_RDWR 02
+#define O_CREAT 0100 /* not fcntl */
+#define O_EXCL 0200 /* not fcntl */
+#define O_NOCTTY 0400 /* not fcntl */
+#define O_TRUNC 01000 /* not fcntl */
+#define O_APPEND 02000
+#define O_NONBLOCK 04000
+#define O_NDELAY O_NONBLOCK
+#define O_SYNC 010000
+#define O_FSYNC O_SYNC
+#define O_ASYNC 020000
+
+#ifdef __USE_GNU
+# define O_DIRECT 040000 /* Direct disk access. */
+# define O_DIRECTORY 0200000 /* Must be a directory. */
+# define O_NOFOLLOW 0400000 /* Do not follow links. */
+# define O_NOATIME 01000000 /* Do not set atime. */
+# define O_CLOEXEC 02000000 /* Set close_on_exec. */
+#endif
+
+/* For now Linux has synchronisity options for data and read operations.
+ We define the symbols here but let them do the same as O_SYNC since
+ this is a superset. */
+#if defined __USE_POSIX199309 || defined __USE_UNIX98
+# define O_DSYNC O_SYNC /* Synchronize data. */
+# define O_RSYNC O_SYNC /* Synchronize read operations. */
+#endif
+
+#ifdef __USE_LARGEFILE64
+# define O_LARGEFILE 0100000
+#endif
+
+/* Values for the second argument to `fcntl'. */
+#define F_DUPFD 0 /* Duplicate file descriptor. */
+#define F_GETFD 1 /* Get file descriptor flags. */
+#define F_SETFD 2 /* Set file descriptor flags. */
+#define F_GETFL 3 /* Get file status flags. */
+#define F_SETFL 4 /* Set file status flags. */
+#ifndef __USE_FILE_OFFSET64
+# define F_GETLK 5 /* Get record locking info. */
+# define F_SETLK 6 /* Set record locking info (non-blocking). */
+# define F_SETLKW 7 /* Set record locking info (blocking). */
+#else
+# define F_GETLK F_GETLK64 /* Get record locking info. */
+# define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
+# define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
+#endif
+#define F_GETLK64 12 /* Get record locking info. */
+#define F_SETLK64 13 /* Set record locking info (non-blocking). */
+#define F_SETLKW64 14 /* Set record locking info (blocking). */
+
+#if defined __USE_BSD || defined __USE_UNIX98
+# define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */
+# define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */
+#endif
+
+#ifdef __USE_GNU
+# define F_SETSIG 10 /* Set number of signal to be sent. */
+# define F_GETSIG 11 /* Get number of signal to be sent. */
+#endif
+
+#ifdef __USE_GNU
+# define F_SETLEASE 1024 /* Set a lease. */
+# define F_GETLEASE 1025 /* Enquire what lease is active. */
+# define F_NOTIFY 1026 /* Request notfications on a directory. */
+# define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
+ close-on-exit set on new fd. */
+#endif
+
+/* For F_[GET|SET]FD. */
+#define FD_CLOEXEC 1 /* actually anything with low bit set goes */
+
+/* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
+#define F_RDLCK 0 /* Read lock. */
+#define F_WRLCK 1 /* Write lock. */
+#define F_UNLCK 2 /* Remove lock. */
+
+/* For old implementation of bsd flock(). */
+#define F_EXLCK 4 /* or 3 */
+#define F_SHLCK 8 /* or 4 */
+
+#ifdef __USE_BSD
+/* Operations for bsd flock(), also used by the kernel implementation. */
+# define LOCK_SH 1 /* shared lock */
+# define LOCK_EX 2 /* exclusive lock */
+# define LOCK_NB 4 /* or'd with one of the above to prevent
+ blocking */
+# define LOCK_UN 8 /* remove lock */
+#endif
+
+#ifdef __USE_GNU
+# define LOCK_MAND 32 /* This is a mandatory flock: */
+# define LOCK_READ 64 /* ... which allows concurrent read operations. */
+# define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
+# define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
+#endif
+
+#ifdef __USE_GNU
+/* Types of directory notifications that may be requested with F_NOTIFY. */
+# define DN_ACCESS 0x00000001 /* File accessed. */
+# define DN_MODIFY 0x00000002 /* File modified. */
+# define DN_CREATE 0x00000004 /* File created. */
+# define DN_DELETE 0x00000008 /* File removed. */
+# define DN_RENAME 0x00000010 /* File renamed. */
+# define DN_ATTRIB 0x00000020 /* File changed attibutes. */
+# define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
+#endif
+
+struct flock
+ {
+ short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
+ short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
+#ifndef __USE_FILE_OFFSET64
+ __off_t l_start; /* Offset where the lock begins. */
+ __off_t l_len; /* Size of the locked area; zero means until EOF. */
+#else
+ __off64_t l_start; /* Offset where the lock begins. */
+ __off64_t l_len; /* Size of the locked area; zero means until EOF. */
+#endif
+ __pid_t l_pid; /* Process holding the lock. */
+ };
+
+#ifdef __USE_LARGEFILE64
+struct flock64
+ {
+ short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
+ short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
+ __off64_t l_start; /* Offset where the lock begins. */
+ __off64_t l_len; /* Size of the locked area; zero means until EOF. */
+ __pid_t l_pid; /* Process holding the lock. */
+ };
+#endif
+
+/* Define some more compatibility macros to be backward compatible with
+ BSD systems which did not managed to hide these kernel macros. */
+#ifdef __USE_BSD
+# define FAPPEND O_APPEND
+# define FFSYNC O_FSYNC
+# define FASYNC O_ASYNC
+# define FNONBLOCK O_NONBLOCK
+# define FNDELAY O_NDELAY
+#endif /* Use BSD. */
+
+/* Advise to `posix_fadvise'. */
+#ifdef __USE_XOPEN2K
+# define POSIX_FADV_NORMAL 0 /* No further special treatment. */
+# define POSIX_FADV_RANDOM 1 /* Expect random page references. */
+# define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
+# define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
+# define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
+# define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
+#endif
+
+
+#if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
+/* Flags for SYNC_FILE_RANGE. */
+# define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
+ in the range before performing the
+ write. */
+# define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
+ dirty pages in the range which are
+ not presently under writeback. */
+# define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
+ the range after performing the
+ write. */
+
+/* Flags for SPLICE and VMSPLICE. */
+# define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
+# define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
+ (but we may still block on the fd
+ we splice from/to). */
+# define SPLICE_F_MORE 4 /* Expect more data. */
+# define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
+#endif
+
+__BEGIN_DECLS
+
+#if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
+
+/* Provide kernel hint to read ahead. */
+extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
+ __THROW;
+
+/* Selective file content synch'ing. */
+extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
+ unsigned int __flags);
+
+/* Splice address range into a pipe. */
+extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
+ size_t __count, unsigned int __flags);
+
+/* Splice two files together. */
+extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
+ __off64_t *__offout, size_t __len,
+ unsigned int __flags);
+
+/* In-kernel implementation of tee for pipe buffers. */
+extern ssize_t tee (int __fdin, int __fdout, size_t __len,
+ unsigned int __flags);
+
+#endif
+__END_DECLS
+
diff --git a/libc/sysdeps/linux/metag/bits/ipc.h b/libc/sysdeps/linux/metag/bits/ipc.h
new file mode 100644
index 000000000..4852ade32
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/ipc.h
@@ -0,0 +1,55 @@
+/* Copyright (C) 1995-1999, 2000, 2005, 2007 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+ Boston, MA 02110-1301, USA. */
+
+#ifndef _SYS_IPC_H
+# error "Never use <bits/ipc.h> directly; include <sys/ipc.h> instead."
+#endif
+
+#include <bits/types.h>
+
+/* Mode bits for `msgget', `semget', and `shmget'. */
+#define IPC_CREAT 01000 /* Create key if key does not exist. */
+#define IPC_EXCL 02000 /* Fail if key exists. */
+#define IPC_NOWAIT 04000 /* Return error on wait. */
+
+/* Control commands for `msgctl', `semctl', and `shmctl'. */
+#define IPC_RMID 0 /* Remove identifier. */
+#define IPC_SET 1 /* Set `ipc_perm' options. */
+#define IPC_STAT 2 /* Get `ipc_perm' options. */
+#ifdef __USE_GNU
+# define IPC_INFO 3 /* See ipcs. */
+#endif
+
+/* Special key values. */
+#define IPC_PRIVATE ((__key_t) 0) /* Private key. */
+
+
+/* Data structure used to pass permission information to IPC operations. */
+struct ipc_perm
+ {
+ __key_t __key; /* Key. */
+ __uid_t uid; /* Owner's user ID. */
+ __gid_t gid; /* Owner's group ID. */
+ __uid_t cuid; /* Creator's user ID. */
+ __gid_t cgid; /* Creator's group ID. */
+ unsigned int mode; /* Read/write permission. */
+ unsigned short __seq; /* Sequence number. */
+ unsigned short __pad1;
+ unsigned long __unused1;
+ unsigned long __unused2;
+ };
diff --git a/libc/sysdeps/linux/metag/bits/kernel_types.h b/libc/sysdeps/linux/metag/bits/kernel_types.h
new file mode 100644
index 000000000..8e0a91f30
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/kernel_types.h
@@ -0,0 +1,45 @@
+/* Note that we use the exact same include guard #define names
+ * as asm/posix_types.h. This will avoid gratuitous conflicts
+ * with the posix_types.h kernel header, and will ensure that
+ * our private content, and not the kernel header, will win.
+ * -Erik
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef __ASM_GENERIC_POSIX_TYPES_H
+#define __ASM_GENERIC_POSIX_TYPES_H
+
+typedef unsigned int __kernel_dev_t;
+typedef unsigned int __kernel_ino_t;
+typedef unsigned int __kernel_mode_t;
+typedef unsigned long __kernel_nlink_t;
+typedef long __kernel_off_t;
+typedef int __kernel_pid_t;
+typedef unsigned int __kernel_uid_t;
+typedef unsigned int __kernel_gid_t;
+typedef unsigned int __kernel_size_t;
+typedef int __kernel_ssize_t;
+typedef long __kernel_ptrdiff_t;
+typedef long __kernel_time_t;
+typedef long __kernel_suseconds_t;
+typedef long __kernel_clock_t;
+typedef int __kernel_daddr_t;
+typedef char * __kernel_caddr_t;
+typedef int __kernel_ipc_pid_t;
+typedef unsigned short __kernel_uid16_t;
+typedef unsigned short __kernel_gid16_t;
+typedef unsigned int __kernel_uid32_t;
+typedef unsigned int __kernel_gid32_t;
+typedef unsigned int __kernel_old_uid_t;
+typedef unsigned int __kernel_old_gid_t;
+typedef __kernel_dev_t __kernel_old_dev_t;
+typedef long long __kernel_loff_t;
+
+typedef struct {
+ int val[2];
+} __kernel_fsid_t;
+
+#endif /* __ASM_GENERIC_POSIX_TYPES_H */
diff --git a/libc/sysdeps/linux/metag/bits/profil-counter.h b/libc/sysdeps/linux/metag/bits/profil-counter.h
new file mode 100644
index 000000000..66ba78141
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/profil-counter.h
@@ -0,0 +1,17 @@
+/*
+ * Low-level statistical profiling support function. Linux/Meta version.
+ *
+ * Copyright (C) 2013, Imagination Technologies Ltd.
+ *
+ * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ *
+ * Based on the SH version from the GNU C Library.
+ */
+
+#include <signal.h>
+
+static void
+profil_counter (int signo, struct sigcontext sc)
+{
+ profil_count (sc.cbuf.ctx.CurrPC);
+}
diff --git a/libc/sysdeps/linux/metag/bits/setjmp.h b/libc/sysdeps/linux/metag/bits/setjmp.h
new file mode 100644
index 000000000..8ad4b12d2
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/setjmp.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2013, Imagination Technologies Ltd.
+ *
+ * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+/* Define the machine-dependent type `jmp_buf' */
+#ifndef _BITS_SETJMP_H
+#define _BITS_SETJMP_H 1
+
+#if !defined _SETJMP_H && !defined _PTHREAD_H
+# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
+#endif
+
+/*
+ jmp_buf[0] - A0StP
+ jmp_buf[1] - A1GbP
+ jmp_buf[2] - A0FrP
+ jmp_buf[3] - A1LbP
+ jmp_buf[4] - D0FrT
+ jmp_buf[5] - D1RtP
+ jmp_buf[6] - D0.5
+ jmp_buf[7] - D1.5
+ jmp_buf[8] - D0.6
+ jmp_buf[9] - D1.6
+ jmp_buf[10] - D0.7
+ jmp_buf[11] - D1.7
+ */
+
+#define _JBLEN 24
+#if defined (__USE_MISC) || defined (_ASM)
+#define JB_SP 0
+#endif
+
+#ifndef _ASM
+typedef int __jmp_buf[_JBLEN] __attribute__((aligned (8)));
+#endif
+
+/* Test if longjmp to JMPBUF would unwind the frame
+ containing a local variable at ADDRESS. */
+#define _JMPBUF_UNWINDS(jmpbuf, address) \
+ ((void *) (address) > (void *) (jmpbuf)[JB_SP])
+
+#endif /* bits/setjmp.h */
diff --git a/libc/sysdeps/linux/metag/bits/sigcontextinfo.h b/libc/sysdeps/linux/metag/bits/sigcontextinfo.h
new file mode 100644
index 000000000..06c566b42
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/sigcontextinfo.h
@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) 2013, Imagination Technologies Ltd.
+ *
+ * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ *
+ */
+
+#define SIGCONTEXT struct sigcontext
+#define SIGCONTEXT_EXTRA_ARGS
+#define GET_PC(ctx) ((void *) ctx.cbuf.ctx.CurrPC)
+#define GET_FRAME(ctx) ((void *) ctx.cbuf.ctx.AX[1].U0)
+#define GET_STACK(ctx) ((void *) ctx.cbuf.ctx.AX[0].U0)
+#define CALL_SIGHANDLER(handler, signo, ctx) \
+ (handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))
diff --git a/libc/sysdeps/linux/metag/bits/stackinfo.h b/libc/sysdeps/linux/metag/bits/stackinfo.h
new file mode 100644
index 000000000..55a61219d
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/stackinfo.h
@@ -0,0 +1,28 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* This file contains a bit of information about the stack allocation
+ of the processor. */
+
+#ifndef _STACKINFO_H
+#define _STACKINFO_H 1
+
+/* On Meta the stack grows up. */
+#define _STACK_GROWS_UP 1
+
+#endif /* stackinfo.h */
diff --git a/libc/sysdeps/linux/metag/bits/syscalls.h b/libc/sysdeps/linux/metag/bits/syscalls.h
new file mode 100644
index 000000000..b5c8fc58c
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/syscalls.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ *
+ * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ *
+ */
+
+#ifndef _BITS_SYSCALLS_H
+#define _BITS_SYSCALLS_H
+#ifndef _SYSCALL_H
+# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
+#endif
+
+/*
+ Meta version adapted from the ARM version.
+*/
+
+#define SYS_ify(syscall_name) (__NR_##syscall_name)
+
+#ifdef __ASSEMBLER__
+
+/* Call a given syscall, with arguments loaded. */
+#undef DO_CALL
+#define DO_CALL(syscall_name, args) \
+ MOV D1Re0, #SYS_ify (syscall_name); \
+ SWITCH #0x440001
+
+#else
+
+#include <errno.h>
+
+#undef INLINE_SYSCALL_NCS
+#define INLINE_SYSCALL_NCS(name, nr, args...) \
+(__extension__ \
+ ({ unsigned int _inline_sys_result = INTERNAL_SYSCALL_NCS (name, , nr, args); \
+ if (unlikely(INTERNAL_SYSCALL_ERROR_P (_inline_sys_result, ))) \
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (_inline_sys_result, )); \
+ _inline_sys_result = (unsigned int) -1; \
+ } \
+ (int) _inline_sys_result; }) \
+)
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
+
+#undef INTERNAL_SYSCALL_NCS
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+(__extension__ \
+ ({unsigned int __sys_result; \
+ { \
+ register int _result __asm__ ("D0Re0"), _nr __asm__ ("D1Re0"); \
+ LOAD_ARGS_##nr (args); \
+ _nr = (name); \
+ __asm__ volatile ("SWITCH #0x440001 ! syscall " #name \
+ : "=r" (_result) \
+ : "d" (_nr) ASM_ARGS_##nr \
+ : "memory"); \
+ __sys_result = _result; \
+ } \
+ (int) __sys_result; }) \
+)
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
+ ((unsigned int) (val) >= 0xfffff001u)
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
+
+#define LOAD_ARGS_0()
+#define ASM_ARGS_0
+#define LOAD_ARGS_1(a1) \
+ register int _a1 __asm__ ("D1Ar1") = (int) (a1); \
+ LOAD_ARGS_0 ()
+#define ASM_ARGS_1 ASM_ARGS_0, "d" (_a1)
+#define LOAD_ARGS_2(a1, a2) \
+ register int _a2 __asm__ ("D0Ar2") = (int) (a2); \
+ LOAD_ARGS_1 (a1)
+#define ASM_ARGS_2 ASM_ARGS_1, "d" (_a2)
+#define LOAD_ARGS_3(a1, a2, a3) \
+ register int _a3 __asm__ ("D1Ar3") = (int) (a3); \
+ LOAD_ARGS_2 (a1, a2)
+#define ASM_ARGS_3 ASM_ARGS_2, "d" (_a3)
+#define LOAD_ARGS_4(a1, a2, a3, a4) \
+ register int _a4 __asm__ ("D0Ar4") = (int) (a4); \
+ LOAD_ARGS_3 (a1, a2, a3)
+#define ASM_ARGS_4 ASM_ARGS_3, "d" (_a4)
+#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
+ register int _a5 __asm__ ("D1Ar5") = (int) (a5); \
+ LOAD_ARGS_4 (a1, a2, a3, a4)
+#define ASM_ARGS_5 ASM_ARGS_4, "d" (_a5)
+#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
+ register int _a6 __asm__ ("D0Ar6") = (int) (a6); \
+ LOAD_ARGS_5 (a1, a2, a3, a4, a5)
+#define ASM_ARGS_6 ASM_ARGS_5, "d" (_a6)
+
+#endif /* __ASSEMBLER__ */
+#endif /* _BITS_SYSCALLS_H */
diff --git a/libc/sysdeps/linux/metag/bits/uClibc_arch_features.h b/libc/sysdeps/linux/metag/bits/uClibc_arch_features.h
new file mode 100644
index 000000000..0a0d00d16
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/uClibc_arch_features.h
@@ -0,0 +1,46 @@
+/*
+ * Track misc arch-specific features that aren't config options
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _BITS_UCLIBC_ARCH_FEATURES_H
+#define _BITS_UCLIBC_ARCH_FEATURES_H
+
+/* instruction used when calling abort() to kill yourself */
+/*#define __UCLIBC_ABORT_INSTRUCTION__ "asm instruction"*/
+#undef __UCLIBC_ABORT_INSTRUCTION__
+
+/* can your target use syscall6() for mmap ? */
+#define __UCLIBC_MMAP_HAS_6_ARGS__
+
+/* does your target use syscall4() for truncate64 ? (32bit arches only) */
+#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+
+/* does your target have a broken create_module() ? */
+#undef __UCLIBC_BROKEN_CREATE_MODULE__
+
+/* does your target have to worry about older [gs]etrlimit() ? */
+#undef __UCLIBC_HANDLE_OLDER_RLIMIT__
+
+/* does your target have an asm .set ? */
+#define __UCLIBC_HAVE_ASM_SET_DIRECTIVE__
+
+/* define if target doesn't like .global */
+#undef __UCLIBC_ASM_GLOBAL_DIRECTIVE__
+
+/* define if target supports .weak */
+#define __UCLIBC_HAVE_ASM_WEAK_DIRECTIVE__
+
+/* define if target supports .weakext */
+#undef __UCLIBC_HAVE_ASM_WEAKEXT_DIRECTIVE__
+
+/* needed probably only for ppc64 */
+#undef __UCLIBC_HAVE_ASM_GLOBAL_DOT_NAME__
+
+/* define if target supports IEEE signed zero floats */
+#define __UCLIBC_HAVE_SIGNED_ZERO__
+
+#endif /* _BITS_UCLIBC_ARCH_FEATURES_H */
diff --git a/libc/sysdeps/linux/metag/bits/wordsize.h b/libc/sysdeps/linux/metag/bits/wordsize.h
new file mode 100644
index 000000000..ba643b60a
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/wordsize.h
@@ -0,0 +1,19 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#define __WORDSIZE 32
diff --git a/libc/sysdeps/linux/metag/brk.c b/libc/sysdeps/linux/metag/brk.c
new file mode 100644
index 000000000..355e88fc7
--- /dev/null
+++ b/libc/sysdeps/linux/metag/brk.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <errno.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+libc_hidden_proto(brk)
+
+/* This must be initialized data because commons can't have aliases. */
+void * __curbrk attribute_hidden = 0;
+
+int brk (void *addr)
+{
+ void *newbrk;
+
+ __asm__ __volatile__ ("MOV D1Re0,%2\n\t"
+ "MOV D1Ar1,%1\n\t"
+ "SWITCH #0x440001\n\t"
+ "MOV %0,D0Re0"
+ : "=r" (newbrk)
+ : "r" (addr), "K" (__NR_brk)
+ : "D0Re0", "D1Re0", "D1Ar1");
+
+ __curbrk = newbrk;
+
+ if (newbrk < addr)
+ {
+ __set_errno (ENOMEM);
+ return -1;
+ }
+
+ return 0;
+}
+libc_hidden_def(brk)
diff --git a/libc/sysdeps/linux/metag/clone.S b/libc/sysdeps/linux/metag/clone.S
new file mode 100644
index 000000000..8fff56710
--- /dev/null
+++ b/libc/sysdeps/linux/metag/clone.S
@@ -0,0 +1,65 @@
+! Copyright (C) 2013 Imagination Technologies Ltd.
+
+! Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+! clone() is even more special than fork() as it mucks with stacks
+! and invokes a function in the right context after its all over.
+
+#include <asm/errno.h>
+#include <asm/unistd.h>
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+
+ .text
+ .global __clone
+ .type __clone,function
+__clone:
+ ! sanity check args
+ MOV D0Re0, #-EINVAL
+ CMP D1Ar1, #0
+ BEQ ___error
+ CMP D0Ar2, #0
+ BEQ ___error
+
+ ! save function pointer
+ MOV D0FrT, D1Ar1
+
+ ! do the system call
+ ! get flags
+ MOV D1Ar1, D1Ar3
+ ! new sp is already in D0Ar2
+ MOV D1Re0, #__NR_clone
+ SWITCH #0x440001
+ CMP D0Re0,#0
+ ! Error on -1
+ BLT ___error
+ ! If non-zero we are the parent
+ MOVNE PC, D1RtP
+ ! BRKPNT
+
+ ! We are the child
+ ! pick the function arg and call address off the stack and execute
+ MOV D0Ar2, D0FrT
+ MOV D1Ar1, D0Ar4
+ MOV D1RtP, PC
+ ADD D1RtP, D1RtP, #8
+ MOV PC, D0Ar2
+
+ ! and we are done, passing the return value through D0Re0
+#ifdef __PIC__
+ B _exit@PLT
+#else
+ B _exit
+#endif
+
+___error:
+ MOV D1Ar1, D0Re0
+#ifdef __PIC__
+ B ___syscall_error@PLT
+#else
+ B ___syscall_error
+#endif
+ .size __clone, .-__clone
+
+.weak _clone
+_clone = __clone
diff --git a/libc/sysdeps/linux/metag/crt1.S b/libc/sysdeps/linux/metag/crt1.S
new file mode 100644
index 000000000..74adc1fdb
--- /dev/null
+++ b/libc/sysdeps/linux/metag/crt1.S
@@ -0,0 +1,76 @@
+! Copyright (C) 2013 Imagination Technologies Ltd.
+
+! Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+
+#include <asm/unistd.h>
+
+ .text
+ .global __start
+ .type __start,function
+__start:
+ MOV D0FrT,A0StP
+ MOV A0FrP,A0StP
+
+ MOV A0.2,#0
+ MOV A0.3,#0
+
+ MOV A1.1,#0
+ MOV A1.2,#0
+ MOV A1.3,#0
+
+ MOV D0.5,#0
+ MOV D0.6,#0
+ MOV D0.7,#0
+
+ MOV D1.5,#0
+ MOV D1.6,#0
+ MOV D1.7,#0
+
+ MOV D1Ar3,D0Ar2 ! argv
+ MOV D0Ar2,D1Ar1 ! argc
+
+#ifdef __PIC__
+ ADDT A1LbP,CPC1,#HI(__GLOBAL_OFFSET_TABLE__)
+ ADD A1LbP,A1LbP,#LO(__GLOBAL_OFFSET_TABLE__+4)
+
+ MOV D1Ar1,A1LbP
+ ADDT D1Ar1,D1Ar1,#HI(_main@GOTOFF)
+ ADD D1Ar1,D1Ar1,#LO(_main@GOTOFF)
+
+ MOV D0Ar4,A1LbP
+ ADDT D0Ar4,D0Ar4,#HI(__init@GOTOFF)
+ ADD D0Ar4,D0Ar4,#LO(__init@GOTOFF)
+
+ MOV D1Ar5,A1LbP
+ ADDT D1Ar5,D1Ar5,#HI(__fini@GOTOFF)
+ ADD D1Ar5,D1Ar5,#LO(__fini@GOTOFF)
+#else
+ MOVT D1Ar1,#HI(_main)
+ ADD D1Ar1,D1Ar1,#LO(_main)
+ MOVT D0Ar4,#HI(__init)
+ ADD D0Ar4,D0Ar4,#LO(__init)
+ MOVT D1Ar5,#HI(__fini)
+ ADD D1Ar5,D1Ar5,#LO(__fini)
+#endif
+
+ MOV D0Ar6,#0 ! rtld_fini
+
+ MOVT D1Re0,#0x80
+
+ SETL [A0StP++],D0Re0,D1Re0 ! stack_end (8Mb)
+
+ MOV D1Re0,#0
+ MOV D0Re0,#0
+
+#ifdef __PIC__
+ CALLR D1RtP, ___uClibc_main@PLT
+#else
+ CALLR D1RtP, ___uClibc_main
+#endif
+
+ MOV D1Re0,#__NR_exit
+ MOV D1Ar1,#0x1
+ SWITCH #0x440001 ! exit syscall
+
+ .size __start,.-__start
diff --git a/libc/sysdeps/linux/metag/crti.S b/libc/sysdeps/linux/metag/crti.S
new file mode 100644
index 000000000..f7fca542d
--- /dev/null
+++ b/libc/sysdeps/linux/metag/crti.S
@@ -0,0 +1,19 @@
+! Copyright (C) 2013 Imagination Technologies Ltd.
+
+! Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+ .section .init
+ .global __init
+ .type __init,function
+__init:
+ MOV D0FrT, A0FrP
+ ADD A0FrP, A0StP, #0
+ SETL [A0StP++], D0.4, D1RtP
+
+ .section .fini
+ .global __fini
+ .type __fini,function
+__fini:
+ MOV D0FrT, A0FrP
+ ADD A0FrP, A0StP, #0
+ SETL [A0StP++], D0.4, D1RtP
diff --git a/libc/sysdeps/linux/metag/crtn.S b/libc/sysdeps/linux/metag/crtn.S
new file mode 100644
index 000000000..c885e5373
--- /dev/null
+++ b/libc/sysdeps/linux/metag/crtn.S
@@ -0,0 +1,19 @@
+! Copyright (C) 2013 Imagination Technologies Ltd.
+
+! Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+ .section .init
+ .global __init
+ .type __init,function
+ GETL D0.4, D1RtP, [A0FrP+#8++]
+ SUB A0StP, A0FrP, #8
+ MOV A0FrP, D0.4
+ MOV PC, D1RtP
+
+ .section .fini
+ .global __fini
+ .type __fini,function
+ GETL D0.4, D1RtP, [A0FrP+#8++]
+ SUB A0StP, A0FrP, #8
+ MOV A0FrP, D0.4
+ MOV PC, D1RtP
diff --git a/libc/sysdeps/linux/metag/metag.c b/libc/sysdeps/linux/metag/metag.c
new file mode 100644
index 000000000..a92f2149c
--- /dev/null
+++ b/libc/sysdeps/linux/metag/metag.c
@@ -0,0 +1,10 @@
+/*
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <errno.h>
+#include <sys/syscall.h>
+
+_syscall2(int,metag_setglobalbit,char *,addr,int,mask)
diff --git a/libc/sysdeps/linux/metag/setjmp.S b/libc/sysdeps/linux/metag/setjmp.S
new file mode 100644
index 000000000..f00b4a841
--- /dev/null
+++ b/libc/sysdeps/linux/metag/setjmp.S
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+!!! setjmp and variants
+ .text
+
+!! int _setjmp (jmp_buf __env)
+!! Store the calling environment in ENV, not saving the signal mask.
+!! Return 0. */
+ .global __setjmp
+ .type __setjmp,function
+__setjmp:
+ MOV D0Ar2,#0
+ B ___sigsetjmp1
+ .size __setjmp,.-__setjmp
+
+!! int setjmp (jmp_buf __env)
+!! Store the calling environment in ENV, also saving the signal mask.
+!! Return 0. */
+ .global _setjmp
+ .type _setjmp,function
+_setjmp:
+ MOV D0Ar2,#1
+ !! fall through to __sigsetjmp
+ .size _setjmp,.-_setjmp
+
+!! int __sigsetjmp (jmp_buf __env, int __savemask)
+!! Store the calling environment in ENV, also saving the
+!! signal mask if SAVEMASK is nonzero. Return 0.
+!! This is the internal name for `sigsetjmp'.
+ .global ___sigsetjmp
+ .type ___sigsetjmp,function
+___sigsetjmp:
+___sigsetjmp1:
+ !! Save A0/A1 regs
+ MSETL [D1Ar1++],A0.0,A0.1
+ !! Use A0.3 as temp
+ MOV A0.3,D1Ar1
+ !! Rewind D1Ar1 that was modified above
+ SUB D1Ar1,D1Ar1,#(2*8)
+ !! Save D0/D1 regs
+ MSETL [A0.3++],D0FrT,D0.5,D0.6,D0.7
+ !! Tail call __sigjmp_save
+#ifdef __PIC__
+ B ___sigjmp_save@PLT
+#else
+ B ___sigjmp_save
+#endif
+ .size ___sigsetjmp,.-___sigsetjmp
diff --git a/libc/sysdeps/linux/metag/sys/io.h b/libc/sysdeps/linux/metag/sys/io.h
new file mode 100644
index 000000000..6fdc44ff8
--- /dev/null
+++ b/libc/sysdeps/linux/metag/sys/io.h
@@ -0,0 +1,48 @@
+/* Copyright (C) 1996, 1998, 1999, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _SYS_IO_H
+
+#define _SYS_IO_H 1
+#include <features.h>
+
+__BEGIN_DECLS
+
+/* If TURN_ON is TRUE, request for permission to do direct i/o on the
+ port numbers in the range [FROM,FROM+NUM-1]. Otherwise, turn I/O
+ permission off for that range. This call requires root privileges. */
+extern int ioperm (unsigned long int __from, unsigned long int __num,
+ int __turn_on) __THROW;
+
+/* Set the I/O privilege level to LEVEL. If LEVEL is nonzero,
+ permission to access any I/O port is granted. This call requires
+ root privileges. */
+extern int iopl (int __level) __THROW;
+
+/* The functions that actually perform reads and writes. */
+extern unsigned char inb (unsigned long int port) __THROW;
+extern unsigned short int inw (unsigned long int port) __THROW;
+extern unsigned long int inl (unsigned long int port) __THROW;
+
+extern void outb (unsigned char value, unsigned long int port) __THROW;
+extern void outw (unsigned short value, unsigned long int port) __THROW;
+extern void outl (unsigned long value, unsigned long int port) __THROW;
+
+__END_DECLS
+
+#endif /* _SYS_IO_H */
diff --git a/libc/sysdeps/linux/metag/sys/procfs.h b/libc/sysdeps/linux/metag/sys/procfs.h
new file mode 100644
index 000000000..4a4ca7672
--- /dev/null
+++ b/libc/sysdeps/linux/metag/sys/procfs.h
@@ -0,0 +1,121 @@
+/* Copyright (C) 1996, 1997, 1999, 2007 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+ Boston, MA 02110-1301, USA. */
+
+#ifndef _SYS_PROCFS_H
+#define _SYS_PROCFS_H 1
+
+/* This is somewhat modelled after the file of the same name on SVR4
+ systems. It provides a definition of the core file format for ELF
+ used on Linux. It doesn't have anything to do with the /proc file
+ system, even though Linux has one.
+
+ Anyway, the whole purpose of this file is for GDB and GDB only.
+ Don't read too much into it. Don't use it for anything other than
+ GDB unless you know what you are doing. */
+
+#include <features.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/user.h>
+
+__BEGIN_DECLS
+
+/* Type for a general-purpose register. */
+typedef unsigned long elf_greg_t;
+
+#define ELF_NGREG 30
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+/* Register set for the floating-point registers. */
+#define ELF_NFPREG 18
+typedef unsigned long elf_fpreg_t;
+typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
+
+/* Signal info. */
+struct elf_siginfo
+ {
+ int si_signo; /* Signal number. */
+ int si_code; /* Extra code. */
+ int si_errno; /* Errno. */
+ };
+
+/* Definitions to generate Intel SVR4-like core files. These mostly
+ have the same names as the SVR4 types with "elf_" tacked on the
+ front to prevent clashes with Linux definitions, and the typedef
+ forms have been avoided. This is mostly like the SVR4 structure,
+ but more Linuxy, with things that Linux does not support and which
+ GDB doesn't really use excluded. */
+
+struct elf_prstatus
+ {
+ struct elf_siginfo pr_info; /* Info associated with signal. */
+ short int pr_cursig; /* Current signal. */
+ unsigned long int pr_sigpend; /* Set of pending signals. */
+ unsigned long int pr_sighold; /* Set of held signals. */
+ __pid_t pr_pid;
+ __pid_t pr_ppid;
+ __pid_t pr_pgrp;
+ __pid_t pr_sid;
+ struct timeval pr_utime; /* User time. */
+ struct timeval pr_stime; /* System time. */
+ struct timeval pr_cutime; /* Cumulative user time. */
+ struct timeval pr_cstime; /* Cumulative system time. */
+ elf_gregset_t pr_reg; /* GP registers. */
+ int pr_fpvalid; /* True if math copro being used. */
+ };
+
+
+#define ELF_PRARGSZ (80) /* Number of chars for args. */
+
+struct elf_prpsinfo
+ {
+ char pr_state; /* Numeric process state. */
+ char pr_sname; /* Char for pr_state. */
+ char pr_zomb; /* Zombie. */
+ char pr_nice; /* Nice val. */
+ unsigned long int pr_flag; /* Flags. */
+ unsigned short int pr_uid;
+ unsigned short int pr_gid;
+ int pr_pid, pr_ppid, pr_pgrp, pr_sid;
+ /* Lots missing */
+ char pr_fname[16]; /* Filename of executable. */
+ char pr_psargs[ELF_PRARGSZ]; /* Initial part of arg list. */
+ };
+
+/* The rest of this file provides the types for emulation of the
+ Solaris <proc_service.h> interfaces that should be implemented by
+ users of libthread_db. */
+
+/* Addresses. */
+typedef void *psaddr_t;
+
+/* Register sets. Linux has different names. */
+typedef elf_gregset_t prgregset_t;
+typedef elf_fpregset_t prfpregset_t;
+
+/* We don't have any differences between processes and threads,
+ therefore have only one PID type. */
+typedef __pid_t lwpid_t;
+
+/* Process status and info. In the end we do provide typedefs for them. */
+typedef struct elf_prstatus prstatus_t;
+typedef struct elf_prpsinfo prpsinfo_t;
+
+__END_DECLS
+
+#endif /* sys/procfs.h */
diff --git a/libc/sysdeps/linux/metag/sys/ucontext.h b/libc/sysdeps/linux/metag/sys/ucontext.h
new file mode 100644
index 000000000..899c20035
--- /dev/null
+++ b/libc/sysdeps/linux/metag/sys/ucontext.h
@@ -0,0 +1,96 @@
+/* Copyright (C) 1998, 1999, 2001, 2006 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* Meta ABI compliant context switching support. */
+
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H 1
+
+#include <features.h>
+#include <signal.h>
+#include <sys/procfs.h>
+
+/* We need the signal context definitions even if they are not used
+ included in <signal.h>. */
+#include <bits/sigcontext.h>
+
+typedef int greg_t;
+
+/* Number of general registers. */
+#define NGREG 18
+
+/* Container for all general registers. */
+typedef elf_gregset_t gregset_t;
+
+/* Number of each register is the `gregset_t' array. */
+enum
+{
+ R0 = 0,
+#define R0 R0
+ R1 = 1,
+#define R1 R1
+ R2 = 2,
+#define R2 R2
+ R3 = 3,
+#define R3 R3
+ R4 = 4,
+#define R4 R4
+ R5 = 5,
+#define R5 R5
+ R6 = 6,
+#define R6 R6
+ R7 = 7,
+#define R7 R7
+ R8 = 8,
+#define R8 R8
+ R9 = 9,
+#define R9 R9
+ R10 = 10,
+#define R10 R10
+ R11 = 11,
+#define R11 R11
+ R12 = 12,
+#define R12 R12
+ R13 = 13,
+#define R13 R13
+ R14 = 14,
+#define R14 R14
+ R15 = 15
+#define R15 R15
+};
+
+/* Structure to describe FPU registers. */
+typedef elf_fpregset_t fpregset_t;
+
+/* Context to describe whole processor state. This only describes
+ the core registers; coprocessor registers get saved elsewhere
+ (e.g. in uc_regspace, or somewhere unspecified on the stack
+ during non-RT signal handlers). */
+typedef struct sigcontext mcontext_t;
+
+/* Userlevel context. */
+typedef struct ucontext
+ {
+ unsigned long uc_flags;
+ struct ucontext *uc_link;
+ stack_t uc_stack;
+ mcontext_t uc_mcontext;
+ __sigset_t uc_sigmask;
+ } ucontext_t;
+
+#endif /* sys/ucontext.h */
diff --git a/libc/sysdeps/linux/metag/sys/user.h b/libc/sysdeps/linux/metag/sys/user.h
new file mode 100644
index 000000000..3d282d9be
--- /dev/null
+++ b/libc/sysdeps/linux/metag/sys/user.h
@@ -0,0 +1,7 @@
+/*
+ * This file is not needed, but in practice gdb might try to include it.
+ *
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
diff --git a/libc/sysdeps/linux/metag/syscall.c b/libc/sysdeps/linux/metag/syscall.c
new file mode 100644
index 000000000..93aabf3e0
--- /dev/null
+++ b/libc/sysdeps/linux/metag/syscall.c
@@ -0,0 +1,40 @@
+/* syscall for META/uClibc
+ *
+ * Copyright (C) 2013 Imagination Technologies
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <features.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+long syscall(long sysnum,
+ long arg1, long arg2, long arg3,
+ long arg4, long arg5, long arg6)
+{
+
+ register long __call __asm__ ("D1Re0") = sysnum;
+ register long __res __asm__ ("D0Re0");
+ register long __a __asm__ ("D1Ar1") = arg1;
+ register long __b __asm__ ("D0Ar2") = arg2;
+ register long __c __asm__ ("D1Ar3") = arg3;
+ register long __d __asm__ ("D0Ar4") = arg4;
+ register long __e __asm__ ("D1Ar5") = arg5;
+ register long __f __asm__ ("D0Ar6") = arg6;
+
+
+ __asm__ __volatile__ ("SWITCH #0x440001"
+ : "=d" (__res)
+ : "d" (__call), "d" (__a), "d" (__b),
+ "d" (__c), "d" (__d), "d" (__e) , "d" (__f)
+ : "memory");
+
+ if(__res >= (unsigned long) -4095) {
+ long err = __res;
+ (*__errno_location()) = (-err);
+ __res = (unsigned long) -1;
+ }
+ return (long) __res;
+}