Move arm from ports to libc.

I've moved the ARM port from ports to the main sysdeps hierarchy.
Beyond the README update, the move of the files was simply

git mv ports/sysdeps/arm sysdeps/arm
git mv ports/sysdeps/unix/arm sysdeps/unix/arm
git mv ports/sysdeps/unix/sysv/linux/arm sysdeps/unix/sysv/linux/arm

and in addition to the ChangeLog entries here, I put a note at the top
of ports/ChangeLog.arm similar to that at the top of
ChangeLog.powerpc.  There is deliberately no NEWS change, as I think
it makes the most sense to put in a general note above all ports
having moved if we can achieve that for 2.20.

Tested that disassembly of installed shared libraries for arm is the
same before and after this patch, except for data (not instructions)
in ld.so (there are assertions in sysdeps/arm/dl-machine.h, and the
path by which that file is found, and so by which it appears in the
assertion message, changes as a result of the move).

	* sysdeps/arm: Move directory from ports/sysdeps/arm.
	* sysdeps/unix/arm: Move directory from ports/sysdeps/unix/arm.
	* sysdeps/unix/sysv/linux/arm: Move directory from
	ports/sysdeps/unix/sysv/linux/arm.
	* README: Update listing for arm-*-linux-gnueabi.

ports/ChangeLog.arm:
	* sysdeps/arm: Move directory to ../sysdeps/arm.
	* sysdeps/unix/arm: Move directory to ../sysdeps.arm.
	* sysdeps/unix/sysv/linux/arm: Move directory to
	../sysdeps/unix/sysv/linux/arm.

5 files changed, 346 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/arm/bits/atomic.h b/sysdeps/unix/sysv/linux/arm/bits/atomic.h
new file mode 100644
index 0000000000..cc73684e8a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/bits/atomic.h
@@ -0,0 +1,107 @@
+/* Atomic operations.  ARM/Linux version.
+   Copyright (C) 2002-2014 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdint.h>
+
+/* If the compiler doesn't provide a primitive, we'll use this macro
+   to get assistance from the kernel.  */
+#ifdef __thumb2__
+# define __arm_assisted_full_barrier() \
+     __asm__ __volatile__						      \
+	     ("movw\tip, #0x0fa0\n\t"					      \
+	      "movt\tip, #0xffff\n\t"					      \
+	      "blx\tip"							      \
+	      : : : "ip", "lr", "cc", "memory");
+#else
+# define __arm_assisted_full_barrier() \
+     __asm__ __volatile__						      \
+	     ("mov\tip, #0xffff0fff\n\t"				      \
+	      "mov\tlr, pc\n\t"						      \
+	      "add\tpc, ip, #(0xffff0fa0 - 0xffff0fff)"			      \
+	      : : : "ip", "lr", "cc", "memory");
+#endif
+
+/* Atomic compare and exchange.  This sequence relies on the kernel to
+   provide a compare and exchange operation which is atomic on the
+   current architecture, either via cleverness on pre-ARMv6 or via
+   ldrex / strex on ARMv6.
+
+   It doesn't matter what register is used for a_oldval2, but we must
+   specify one to work around GCC PR rtl-optimization/21223.  Otherwise
+   it may cause a_oldval or a_tmp to be moved to a different register.
+
+   We use the union trick rather than simply using __typeof (...) in the
+   declarations of A_OLDVAL et al because when NEWVAL or OLDVAL is of the
+   form *PTR and PTR has a 'volatile ... *' type, then __typeof (*PTR) has
+   a 'volatile ...' type and this triggers -Wvolatile-register-var to
+   complain about 'register volatile ... asm ("reg")'.  */
+#ifdef __thumb2__
+/* Thumb-2 has ldrex/strex.  However it does not have barrier instructions,
+   so we still need to use the kernel helper.  */
+# define __arm_assisted_compare_and_exchange_val_32_acq(mem, newval, oldval) \
+  ({ union { __typeof (oldval) a; uint32_t v; } oldval_arg = { .a = (oldval) };\
+     union { __typeof (newval) a; uint32_t v; } newval_arg = { .a = (newval) };\
+     register uint32_t a_oldval asm ("r0");				      \
+     register uint32_t a_newval asm ("r1") = newval_arg.v;		      \
+     register __typeof (mem) a_ptr asm ("r2") = (mem);			      \
+     register uint32_t a_tmp asm ("r3");				      \
+     register uint32_t a_oldval2 asm ("r4") = oldval_arg.v;		      \
+     __asm__ __volatile__						      \
+	     ("0:\tldr\t%[tmp],[%[ptr]]\n\t"				      \
+	      "cmp\t%[tmp], %[old2]\n\t"				      \
+	      "bne\t1f\n\t"						      \
+	      "mov\t%[old], %[old2]\n\t"				      \
+	      "movw\t%[tmp], #0x0fc0\n\t"				      \
+	      "movt\t%[tmp], #0xffff\n\t"				      \
+	      "blx\t%[tmp]\n\t"						      \
+	      "bcc\t0b\n\t"						      \
+	      "mov\t%[tmp], %[old2]\n\t"				      \
+	      "1:"							      \
+	      : [old] "=&r" (a_oldval), [tmp] "=&r" (a_tmp)		      \
+	      : [new] "r" (a_newval), [ptr] "r" (a_ptr),		      \
+		[old2] "r" (a_oldval2)					      \
+	      : "ip", "lr", "cc", "memory");				      \
+     (__typeof (oldval)) a_tmp; })
+#else
+# define __arm_assisted_compare_and_exchange_val_32_acq(mem, newval, oldval) \
+  ({ union { __typeof (oldval) a; uint32_t v; } oldval_arg = { .a = (oldval) };\
+     union { __typeof (newval) a; uint32_t v; } newval_arg = { .a = (newval) };\
+     register uint32_t a_oldval asm ("r0");				      \
+     register uint32_t a_newval asm ("r1") = newval_arg.v;		      \
+     register __typeof (mem) a_ptr asm ("r2") = (mem);			      \
+     register uint32_t a_tmp asm ("r3");				      \
+     register uint32_t a_oldval2 asm ("r4") = oldval_arg.v;		      \
+     __asm__ __volatile__						      \
+	     ("0:\tldr\t%[tmp],[%[ptr]]\n\t"				      \
+	      "cmp\t%[tmp], %[old2]\n\t"				      \
+	      "bne\t1f\n\t"						      \
+	      "mov\t%[old], %[old2]\n\t"				      \
+	      "mov\t%[tmp], #0xffff0fff\n\t"				      \
+	      "mov\tlr, pc\n\t"						      \
+	      "add\tpc, %[tmp], #(0xffff0fc0 - 0xffff0fff)\n\t"		      \
+	      "bcc\t0b\n\t"						      \
+	      "mov\t%[tmp], %[old2]\n\t"				      \
+	      "1:"							      \
+	      : [old] "=&r" (a_oldval), [tmp] "=&r" (a_tmp)		      \
+	      : [new] "r" (a_newval), [ptr] "r" (a_ptr),		      \
+		[old2] "r" (a_oldval2)					      \
+	      : "ip", "lr", "cc", "memory");				      \
+     (__typeof (oldval)) a_tmp; })
+#endif
+
+#include <sysdeps/arm/bits/atomic.h>
diff --git a/sysdeps/unix/sysv/linux/arm/bits/fcntl.h b/sysdeps/unix/sysv/linux/arm/bits/fcntl.h
new file mode 100644
index 0000000000..a5f5f448e8
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/bits/fcntl.h
@@ -0,0 +1,54 @@
+/* O_*, F_*, FD_* bit values for Linux.
+   Copyright (C) 1995-2014 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef	_FCNTL_H
+# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
+#endif
+
+#define __O_DIRECTORY	 040000	/* Must be a directory.	 */
+#define __O_NOFOLLOW	0100000	/* Do not follow links.	 */
+#define __O_DIRECT	0200000	/* Direct disk access.	*/
+#define __O_LARGEFILE	0400000
+
+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
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/sysdeps/unix/sysv/linux/arm/bits/hwcap.h b/sysdeps/unix/sysv/linux/arm/bits/hwcap.h
new file mode 100644
index 0000000000..b438d2a02f
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/bits/hwcap.h
@@ -0,0 +1,42 @@
+/* Defines for bits in AT_HWCAP.  ARM Linux version.
+   Copyright (C) 2012-2014 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_AUXV_H
+# error "Never include <bits/hwcap.h> directly; use <sys/auxv.h> instead."
+#endif
+
+/* The following must match the kernel's <asm/hwcap.h>.  */
+#define HWCAP_ARM_SWP		1
+#define HWCAP_ARM_HALF		2
+#define HWCAP_ARM_THUMB		4
+#define HWCAP_ARM_26BIT		8
+#define HWCAP_ARM_FAST_MULT	16
+#define HWCAP_ARM_FPA		32
+#define HWCAP_ARM_VFP		64
+#define HWCAP_ARM_EDSP		128
+#define HWCAP_ARM_JAVA		256
+#define HWCAP_ARM_IWMMXT	512
+#define HWCAP_ARM_CRUNCH	1024
+#define HWCAP_ARM_THUMBEE	2048
+#define HWCAP_ARM_NEON		4096
+#define HWCAP_ARM_VFPv3		8192
+#define HWCAP_ARM_VFPv3D16	16384
+#define HWCAP_ARM_TLS		32768
+#define HWCAP_ARM_VFPv4		65536
+#define HWCAP_ARM_IDIVA		131072
+#define HWCAP_ARM_IDIVT		262144
diff --git a/sysdeps/unix/sysv/linux/arm/bits/mman.h b/sysdeps/unix/sysv/linux/arm/bits/mman.h
new file mode 100644
index 0000000000..8259b96894
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/bits/mman.h
@@ -0,0 +1,40 @@
+/* Definitions for POSIX memory map interface.  Linux/ARM version.
+   Copyright (C) 1997-2014 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, 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.  */
+
+/* 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>
diff --git a/sysdeps/unix/sysv/linux/arm/bits/shm.h b/sysdeps/unix/sysv/linux/arm/bits/shm.h
new file mode 100644
index 0000000000..a479054495
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/bits/shm.h
@@ -0,0 +1,103 @@
+/* Copyright (C) 1995-2014 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_SHM_H
+# error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
+#endif
+
+#include <bits/types.h>
+
+/* Permission flag for shmget.  */
+#define SHM_R		0400		/* or S_IRUGO from <linux/stat.h> */
+#define SHM_W		0200		/* or S_IWUGO from <linux/stat.h> */
+
+/* Flags for `shmat'.  */
+#define SHM_RDONLY	010000		/* attach read-only else read-write */
+#define SHM_RND		020000		/* round attach address to SHMLBA */
+#define SHM_REMAP	040000		/* take-over region on attach */
+#define SHM_EXEC	0100000		/* execution access */
+
+/* Commands for `shmctl'.  */
+#define SHM_LOCK	11		/* lock segment (root only) */
+#define SHM_UNLOCK	12		/* unlock segment (root only) */
+
+__BEGIN_DECLS
+
+/* Segment low boundary address multiple.  */
+#define SHMLBA		(__getpagesize () << 2)
+extern int __getpagesize (void) __THROW __attribute__ ((__const__));
+
+
+/* Type to count number of attaches.  */
+typedef unsigned long int shmatt_t;
+
+/* Data structure describing a shared memory segment.  */
+struct shmid_ds
+  {
+    struct ipc_perm shm_perm;		/* operation permission struct */
+    size_t shm_segsz;			/* size of segment in bytes */
+    __time_t shm_atime;			/* time of last shmat() */
+    unsigned long int __glibc_reserved1;
+    __time_t shm_dtime;			/* time of last shmdt() */
+    unsigned long int __glibc_reserved2;
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+    unsigned long int __glibc_reserved3;
+    __pid_t shm_cpid;			/* pid of creator */
+    __pid_t shm_lpid;			/* pid of last shmop */
+    shmatt_t shm_nattch;		/* number of current attaches */
+    unsigned long int __glibc_reserved4;
+    unsigned long int __glibc_reserved5;
+  };
+
+#ifdef __USE_MISC
+
+/* ipcs ctl commands */
+# define SHM_STAT 	13
+# define SHM_INFO 	14
+
+/* shm_mode upper byte flags */
+# define SHM_DEST	01000	/* segment will be destroyed on last detach */
+# define SHM_LOCKED	02000   /* segment will not be swapped */
+# define SHM_HUGETLB	04000	/* segment is mapped via hugetlb */
+# define SHM_NORESERVE	010000	/* don't check for reservations */
+
+struct	shminfo
+  {
+    unsigned long int shmmax;
+    unsigned long int shmmin;
+    unsigned long int shmmni;
+    unsigned long int shmseg;
+    unsigned long int shmall;
+    unsigned long int __glibc_reserved1;
+    unsigned long int __glibc_reserved2;
+    unsigned long int __glibc_reserved3;
+    unsigned long int __glibc_reserved4;
+  };
+
+struct shm_info
+  {
+    int used_ids;
+    unsigned long int shm_tot;	/* total allocated shm */
+    unsigned long int shm_rss;	/* total resident shm */
+    unsigned long int shm_swp;	/* total swapped shm */
+    unsigned long int swap_attempts;
+    unsigned long int swap_successes;
+  };
+
+#endif /* __USE_MISC */
+
+__END_DECLS