aarch64: Add ILP32 support

Add support for the ILP32 abi variant to aarch64.

2017-09-01  Andrew Pinski  <andrew.pinski@caviumnetworks.com>
	    Yury Norov  <ynorov@caviumnetworks.com>
	    Steve Ellcey  <sellcey@caviumnetworks.com>

	* elf/cache.c (print_entry): Add FLAG_AARCH64_LIB32.
	* sysdeps/aarch64/configure.ac (HAVE_AARCH64_ILP32): New define.
	(default-abi): Allow for ilp32 ABI.
	* sysdeps/aarch64/configure: Regenerate.
	* sysdeps/aarch64/Implies: Deleted.
	* sysdeps/aarch64/ilp32/Implies: New file.
	* sysdeps/aarch64/ilp32/Implies-after: New file.
	* sysdeps/aarch64/lp64/Implies: New file.
	* sysdeps/aarch64/lp64/Implies-after: New file.
	* sysdeps/aarch64/nptl/bits/pthreadtypes-arch.h
	(__PTHREAD_RWLOCK_INT_FLAGS_SHARED): Set to 1.
	* sysdeps/aarch64/preconfigure (machine): Check for ilp32/lp64.
	* sysdeps/aarch64/tls-macros.h (TLS_IE): Remove register specification
	for __result and ifdef for ILP32.
	* sysdeps/generic/ldconfig.h (FLAG_AARCH64_LIB32): New define.
	* sysdeps/unix/sysv/linux/aarch64/Implies: Remove generic and
	wordsize-64 entries.
	* sysdeps/unix/sysv/linux/aarch64/Makefile (abi-variants): Add
	new variants for ilp32 and ilp32_be.
	(abi-lp64-condition, abi-lp64_be-condition): Check for __WORDSIZE
	equal to 64.
	(abi-ilp32-condition, abi-ilp32_be-condition): New.
	* sysdeps/unix/sysv/linux/aarch64/configure.ac (arch_minimum_kernel):
	Use different value for ILP32.
	(LIBC_SLIBDIR_RTLDDIR): Modify for ILP32.
	* sysdeps/unix/sysv/linux/aarch64/configure: Regenerate.
	* sysdeps/unix/sysv/linux/aarch64/ilp32/Implies: New file.
	* sysdeps/unix/sysv/linux/aarch64/ilp32/c++-types.data: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/ilp32/kernel_stat.h: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/ilp32/shlib-versions: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/bits/statfs.h: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/bits/typesizes.h: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/bits/utmp.h: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/bits/utmpx.h: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/kernel-features.h: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/Implies: Add unix/sysv/linux/aarch64.
	* sysdeps/unix/sysv/linux/aarch64/ioctl.S: Move to lp64 directory.
	* sysdeps/unix/sysv/linux/aarch64/mmap.c: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/shlib-versions: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/c++-types.data: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/ldd-rewrite.sed: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/ipc_priv.h (__IPC_64): Check __ILP32
	when setting.
	* sysdeps/unix/sysv/linux/arm/readelflib.c (process_elf_file):
	Check for EM_AARCH64 when processing ELFCLASS32 object.
	* sysdeps/unix/sysv/linux/bits/fcntl-linux.h (F_GETLK, F_SETLCK,
	F_SETLKW): Check for __OFF_T_MATCHES_OFF64_T when defining.

elf/cache.c

@@ -101,6 +101,9 @@ print_entry (const char *lib, int flag, unsigned int osversion,
     case FLAG_AARCH64_LIB64:
       fputs (",AArch64", stdout);
       break;
+    case FLAG_AARCH64_LIB32:
+      fputs (",ILP32", stdout);
+      break;
     /* Uses the ARM soft-float ABI.  */
     case FLAG_ARM_LIBSF:
       fputs (",soft-float", stdout);

sysdeps/aarch64/configure

@@ -163,12 +163,19 @@ rm -f conftest*
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_be" >&5
 $as_echo "$libc_cv_aarch64_be" >&6; }
+
+if test $aarch64_config_abi = ilp32; then
+  $as_echo "#define HAVE_AARCH64_ILP32 1" >>confdefs.h
+
+fi
+
 if test $libc_cv_aarch64_be = yes; then
   $as_echo "#define HAVE_AARCH64_BE 1" >>confdefs.h
 
-  config_vars="$config_vars
+  libc_aarch64_be=_be
-default-abi = lp64_be"
 else
-  config_vars="$config_vars
+  libc_aarch64_be=
-default-abi = lp64"
 fi
+
+config_vars="$config_vars
+default-abi = ${aarch64_config_abi}${libc_aarch64_be}"

sysdeps/aarch64/configure.ac

@@ -14,9 +14,16 @@ AC_CACHE_CHECK([for big endian],
                       yes
                      #endif
   ], libc_cv_aarch64_be=yes, libc_cv_aarch64_be=no)])
+
+if test $aarch64_config_abi = ilp32; then
+  AC_DEFINE(HAVE_AARCH64_ILP32)
+fi
+
 if test $libc_cv_aarch64_be = yes; then
   AC_DEFINE(HAVE_AARCH64_BE)
-  LIBC_CONFIG_VAR([default-abi], [lp64_be])
+  libc_aarch64_be=_be
 else
-  LIBC_CONFIG_VAR([default-abi], [lp64])
+  libc_aarch64_be=
 fi
+
+LIBC_CONFIG_VAR([default-abi], [${aarch64_config_abi}${libc_aarch64_be}])

sysdeps/aarch64/ilp32/Implies

@@ -1,4 +1,4 @@
-wordsize-64
+aarch64/fpu
 ieee754/ldbl-128
 ieee754/dbl-64/wordsize-64
 ieee754/dbl-64

sysdeps/aarch64/ilp32/Implies-after

@@ -0,0 +1 @@
+wordsize-32

sysdeps/aarch64/lp64/Implies

@@ -0,0 +1,6 @@
+aarch64/fpu
+ieee754/ldbl-128
+ieee754/dbl-64/wordsize-64
+ieee754/dbl-64
+ieee754/flt-32
+aarch64/soft-fp

sysdeps/aarch64/lp64/Implies-after

@@ -0,0 +1 @@
+wordsize-64

sysdeps/aarch64/nptl/bits/pthreadtypes-arch.h

@@ -67,5 +67,6 @@ struct __pthread_rwlock_arch_t
 };
 
 #define __PTHREAD_RWLOCK_ELISION_EXTRA 0
+#define __PTHREAD_RWLOCK_INT_FLAGS_SHARED 1
 
 #endif	/* bits/pthreadtypes.h */

sysdeps/aarch64/preconfigure

@@ -1,6 +1,14 @@
 case "$machine" in
 aarch64*)
+	abiflag=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null`
 	base_machine=aarch64
-	machine=aarch64
+	case "$abiflag" in
+		*"#define __ILP32__ 1"*) aarch64_config_abi=ilp32 ;;
+		*) aarch64_config_abi=lp64 ;;
+	esac
+	case $aarch64_config_abi in
+		ilp32) machine=aarch64/ilp32 ;;
+		lp64) machine=aarch64/lp64 ;;
+	esac
 	;;
 esac

sysdeps/aarch64/tls-macros.h

@@ -32,8 +32,9 @@
 	    "x30", "memory", "cc");			\
      (int *) (__result); })
 
+#ifdef __LP64__
 # define TLS_IE(x)					\
-  ({ register unsigned long __result asm ("x0");	\
+  ({ register unsigned long __result;			\
      register unsigned long __t;			\
      asm ("mrs	%1, tpidr_el0; "			\
 	  "adrp	%0, :gottprel:" #x "; "			\
@@ -41,6 +42,17 @@
 	  "add	%0, %0, %1"				\
 	  : "=r" (__result), "=r" (__t));		\
      (int *) (__result); })
+#else
+# define TLS_IE(x)					\
+  ({ register unsigned long __result;			\
+     register unsigned long __t;			\
+     asm ("mrs	%1, tpidr_el0; "			\
+	  "adrp	%0, :gottprel:" #x "; "			\
+	  "ldr	%w0, [%0, #:gottprel_lo12:" #x "]; "	\
+	  "add	%0, %0, %1"				\
+	  : "=r" (__result), "=r" (__t));		\
+     (int *) (__result); })
+#endif
 
 #define TLS_LE(x)					\
   ({ register unsigned long __result asm ("x0");	\

sysdeps/generic/ldconfig.h

@@ -44,6 +44,7 @@
 #define FLAG_MIPS64_LIBN64_NAN2008	0x0e00
 #define FLAG_RISCV_FLOAT_ABI_SOFT	0x0f00
 #define FLAG_RISCV_FLOAT_ABI_DOUBLE	0x1000
+#define FLAG_AARCH64_LIB32		0x1100
 
 /* Name of auxiliary cache.  */
 #define _PATH_LDCONFIG_AUX_CACHE "/var/cache/ldconfig/aux-cache"

sysdeps/unix/sysv/linux/aarch64/Implies

@@ -1,3 +1 @@
 aarch64/nptl
-unix/sysv/linux/generic
-unix/sysv/linux/wordsize-64

sysdeps/unix/sysv/linux/aarch64/Makefile

@@ -23,10 +23,14 @@ endif
 
 abi-variants := lp64
 abi-variants += lp64_be
+abi-variants += ilp32
+abi-variants += ilp32_be
 
 ifeq (,$(filter $(default-abi),$(abi-variants)))
 Unknown ABI, must be one of $(abi-variants)
 endif
 
-abi-lp64-condition := !defined __AARCH64EB__
+abi-lp64-condition := __WORDSIZE == 64 && !defined __AARCH64EB__
-abi-lp64_be-condition := defined __AARCH64EB__
+abi-lp64_be-condition := __WORDSIZE == 64 && defined __AARCH64EB__
+abi-ilp32-condition := __WORDSIZE == 32 && !defined __AARCH64EB__
+abi-ilp32_be-condition := __WORDSIZE == 32 && defined __AARCH64EB__

sysdeps/unix/sysv/linux/aarch64/bits/stat.h

@@ -0,0 +1,178 @@
+/* Definition of `struct stat' used in the kernel.
+   Copyright (C) 2017 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/>.  */
+
+#if !defined _SYS_STAT_H && !defined _FCNTL_H
+# error "Never include <bits/stat.h> directly; use <sys/stat.h> instead."
+#endif
+
+#ifndef _BITS_STAT_H
+#define _BITS_STAT_H	1
+
+#include <bits/wordsize.h>
+
+/* 64-bit libc uses the kernel's 'struct stat', accessed via the
+   stat() syscall; 32-bit libc uses the kernel's 'struct stat64'
+   and accesses it via the stat64() syscall.  All the various
+   APIs offered by libc use the kernel shape for their struct stat
+   structure; the only difference is that 32-bit programs not
+   using __USE_FILE_OFFSET64 only see the low 32 bits of some
+   of the fields (specifically st_ino, st_size, and st_blocks).  */
+#define _STAT_VER_KERNEL	0
+#define _STAT_VER_LINUX		0
+#define _STAT_VER		_STAT_VER_KERNEL
+
+/* Versions of the `xmknod' interface.  */
+#define _MKNOD_VER_LINUX	0
+
+struct stat
+  {
+    __dev_t st_dev;		/* Device.  */
+#ifdef __LP64__
+    __ino_t st_ino;		/* File serial number. */
+#else
+    unsigned int __pad0;
+    unsigned int __st_ino;	/* 32bit file serial number.	*/
+#endif
+    __mode_t st_mode;		/* File mode.  */
+    __nlink_t st_nlink;		/* Link count.  */
+    __uid_t st_uid;		/* User ID of the file's owner.	*/
+    __gid_t st_gid;		/* Group ID of the file's group.*/
+    __dev_t st_rdev;		/* Device number, if device.  */
+    __dev_t __pad1;
+    __off_t st_size;		/* Size of file, in bytes. */
+    __blksize_t st_blksize;	/* Optimal block size for I/O.  */
+#ifdef __LP64__
+    int __pad2;
+#endif
+    __blkcnt_t st_blocks;	/* 512-byte blocks */
+#ifdef __USE_XOPEN2K8
+    /* Nanosecond resolution timestamps are stored in a format
+       equivalent to 'struct timespec'.  This is the type used
+       whenever possible but the Unix namespace rules do not allow the
+       identifier 'timespec' to appear in the <sys/stat.h> header.
+       Therefore we have to handle the use of this header in strictly
+       standard-compliant sources special.  */
+    struct timespec st_atim;		/* Time of last access.  */
+    struct timespec st_mtim;		/* Time of last modification.  */
+    struct timespec st_ctim;		/* Time of last status change.  */
+# define st_atime st_atim.tv_sec	/* Backward compatibility.  */
+# define st_mtime st_mtim.tv_sec
+# define st_ctime st_ctim.tv_sec
+#else
+    __time_t st_atime;			/* Time of last access.  */
+    unsigned long int st_atimensec;	/* Nscecs of last access.  */
+    __time_t st_mtime;			/* Time of last modification.  */
+    unsigned long int st_mtimensec;	/* Nsecs of last modification.  */
+    __time_t st_ctime;			/* Time of last status change.  */
+    unsigned long int st_ctimensec;	/* Nsecs of last status change.  */
+#endif
+#ifdef __LP64__
+    int __glibc_reserved[2];
+#else
+    __ino_t st_ino;			/* File serial number.	*/
+#endif
+  };
+
+#ifdef __USE_LARGEFILE64
+struct stat64
+  {
+    __dev_t st_dev;		/* Device.  */
+# ifdef __LP64__
+    __ino64_t st_ino;		/* File serial number. */
+# else
+    unsigned int __pad0;
+    unsigned int __st_ino;	/* 32bit file serial number.	*/
+# endif
+    __mode_t st_mode;		/* File mode.  */
+    __nlink_t st_nlink;		/* Link count.  */
+    __uid_t st_uid;		/* User ID of the file's owner.	*/
+    __gid_t st_gid;		/* Group ID of the file's group.*/
+    __dev_t st_rdev;		/* Device number, if device.  */
+    __dev_t __pad1;
+    __off64_t st_size;		/* Size of file, in bytes.  */
+    __blksize_t st_blksize;	/* Optimal block size for I/O.  */
+# ifdef __LP64__
+    int __pad2;
+# endif
+    __blkcnt64_t st_blocks;	/* Nr. 512-byte blocks allocated.  */
+# ifdef __USE_XOPEN2K8
+    /* Nanosecond resolution timestamps are stored in a format
+       equivalent to 'struct timespec'.  This is the type used
+       whenever possible but the Unix namespace rules do not allow the
+       identifier 'timespec' to appear in the <sys/stat.h> header.
+       Therefore we have to handle the use of this header in strictly
+       standard-compliant sources special.  */
+    struct timespec st_atim;		/* Time of last access.  */
+    struct timespec st_mtim;		/* Time of last modification.  */
+    struct timespec st_ctim;		/* Time of last status change.  */
+# else
+    __time_t st_atime;			/* Time of last access.  */
+    unsigned long int st_atimensec;	/* Nscecs of last access.  */
+    __time_t st_mtime;			/* Time of last modification.  */
+    unsigned long int st_mtimensec;	/* Nsecs of last modification.  */
+    __time_t st_ctime;			/* Time of last status change.  */
+    unsigned long int st_ctimensec;	/* Nsecs of last status change.  */
+# endif
+# ifdef __LP64__
+    int __glibc_reserved[2];
+# else
+    __ino_t st_ino;			/* File serial number.	*/
+# endif
+  };
+#endif
+
+/* Tell code we have these members.  */
+#define _STATBUF_ST_BLKSIZE
+#define _STATBUF_ST_RDEV
+/* Nanosecond resolution time values are supported.  */
+#define _STATBUF_ST_NSEC
+
+/* Encoding of the file mode.  */
+
+#define __S_IFMT	0170000	/* These bits determine file type.  */
+
+/* File types.  */
+#define __S_IFDIR	0040000	/* Directory.  */
+#define __S_IFCHR	0020000	/* Character device.  */
+#define __S_IFBLK	0060000	/* Block device.  */
+#define __S_IFREG	0100000	/* Regular file.  */
+#define __S_IFIFO	0010000	/* FIFO.  */
+#define __S_IFLNK	0120000	/* Symbolic link.  */
+#define __S_IFSOCK	0140000	/* Socket.  */
+
+/* POSIX.1b objects.  Note that these macros always evaluate to zero.  But
+   they do it by enforcing the correct use of the macros.  */
+#define __S_TYPEISMQ(buf)  ((buf)->st_mode - (buf)->st_mode)
+#define __S_TYPEISSEM(buf) ((buf)->st_mode - (buf)->st_mode)
+#define __S_TYPEISSHM(buf) ((buf)->st_mode - (buf)->st_mode)
+
+/* Protection bits.  */
+
+#define __S_ISUID	04000	/* Set user ID on execution.  */
+#define __S_ISGID	02000	/* Set group ID on execution.  */
+#define __S_ISVTX	01000	/* Save swapped text after use (sticky).  */
+#define __S_IREAD	0400	/* Read by owner.  */
+#define __S_IWRITE	0200	/* Write by owner.  */
+#define __S_IEXEC	0100	/* Execute by owner.  */
+
+#ifdef __USE_ATFILE
+# define UTIME_NOW	((1l << 30) - 1l)
+# define UTIME_OMIT	((1l << 30) - 2l)
+#endif
+
+#endif /* bits/stat.h */

sysdeps/unix/sysv/linux/aarch64/bits/statfs.h

@@ -0,0 +1,68 @@
+/* Definition of `struct statfs', information about a filesystem.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   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_STATFS_H
+# error "Never include <bits/statfs.h> directly; use <sys/statfs.h> instead."
+#endif
+
+#include <endian.h>
+#include <bits/types.h>
+#include <bits/wordsize.h>
+
+/* On AArch64 both the 32-bit and 64-bit libc's use the kernels
+   'struct statfs' with 64 bit f_blocks/f_bfree/f_bavail/f_files/f_ffree
+   fields.  This means the statfs and statfs64 structs are identical
+   and the statfs and statfs64 calls can be aliases.  */
+
+struct statfs
+  {
+    __SWORD_TYPE f_type;
+    __SWORD_TYPE f_bsize;
+    __fsblkcnt_t f_blocks;
+    __fsblkcnt_t f_bfree;
+    __fsblkcnt_t f_bavail;
+    __fsfilcnt_t f_files;
+    __fsfilcnt_t f_ffree;
+    __fsid_t f_fsid;
+    __SWORD_TYPE f_namelen;
+    __SWORD_TYPE f_frsize;
+    __SWORD_TYPE f_flags;
+    __SWORD_TYPE f_spare[4];
+  };
+
+struct statfs64
+  {
+    __SWORD_TYPE f_type;
+    __SWORD_TYPE f_bsize;
+    __fsblkcnt64_t f_blocks;
+    __fsblkcnt64_t f_bfree;
+    __fsblkcnt64_t f_bavail;
+    __fsfilcnt64_t f_files;
+    __fsfilcnt64_t f_ffree;
+    __fsid_t f_fsid;
+    __SWORD_TYPE f_namelen;
+    __SWORD_TYPE f_frsize;
+    __SWORD_TYPE f_flags;
+    __SWORD_TYPE f_spare[4];
+  };
+
+/* Tell code we have these members.  */
+#define _STATFS_F_NAMELEN
+#define _STATFS_F_FRSIZE
+#define _STATFS_F_FLAGS

sysdeps/unix/sysv/linux/aarch64/bits/typesizes.h

@@ -0,0 +1,88 @@
+/* bits/typesizes.h -- underlying types for *_t.  Linux/AArch64 version.
+   Copyright (C) 2017 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 _BITS_TYPES_H
+# error "Never include <bits/typesizes.h> directly; use <sys/types.h> instead."
+#endif
+
+#ifndef	_BITS_TYPESIZES_H
+#define _BITS_TYPESIZES_H	1
+
+/* See <bits/types.h> for the meaning of these macros.  This file exists so
+   that <bits/types.h> need not vary across different GNU platforms.  */
+
+#define __DEV_T_TYPE		__UQUAD_TYPE
+#define __UID_T_TYPE		__U32_TYPE
+#define __GID_T_TYPE		__U32_TYPE
+#define __INO_T_TYPE		__UQUAD_TYPE
+#define __INO64_T_TYPE		__UQUAD_TYPE
+#define __MODE_T_TYPE		__U32_TYPE
+#define __NLINK_T_TYPE		__U32_TYPE
+#define __OFF_T_TYPE		__SQUAD_TYPE
+#define __OFF64_T_TYPE		__SQUAD_TYPE
+#define __PID_T_TYPE		__S32_TYPE
+#define __RLIM_T_TYPE		__UQUAD_TYPE
+#define __RLIM64_T_TYPE		__UQUAD_TYPE
+#define __BLKCNT_T_TYPE		__SQUAD_TYPE
+#define __BLKCNT64_T_TYPE	__SQUAD_TYPE
+#define __FSBLKCNT_T_TYPE	__UQUAD_TYPE
+#define __FSBLKCNT64_T_TYPE	__UQUAD_TYPE
+#define __FSFILCNT_T_TYPE	__UQUAD_TYPE
+#define __FSFILCNT64_T_TYPE	__UQUAD_TYPE
+#define __FSWORD_T_TYPE		__SWORD_TYPE
+#define __ID_T_TYPE		__U32_TYPE
+#define __CLOCK_T_TYPE		__SLONGWORD_TYPE
+#define __TIME_T_TYPE		__SLONGWORD_TYPE
+#define __USECONDS_T_TYPE	__U32_TYPE
+#define __SUSECONDS_T_TYPE	__SLONGWORD_TYPE
+#define __DADDR_T_TYPE		__S32_TYPE
+#define __KEY_T_TYPE		__S32_TYPE
+#define __CLOCKID_T_TYPE	__S32_TYPE
+#define __TIMER_T_TYPE		void *
+#define __BLKSIZE_T_TYPE	__S32_TYPE
+#define __FSID_T_TYPE		struct { int __val[2]; }
+/* ssize_t is always singed long in both ABIs. */
+#define __SSIZE_T_TYPE		__SLONGWORD_TYPE
+#define __SYSCALL_SLONG_TYPE	__SLONGWORD_TYPE
+#define __SYSCALL_ULONG_TYPE	__ULONGWORD_TYPE
+#define __CPU_MASK_TYPE         __ULONGWORD_TYPE
+
+/* Tell the libc code that off_t and off64_t are actually the same type
+   for all ABI purposes, even if possibly expressed as different base types
+   for C type-checking purposes.  */
+#define __OFF_T_MATCHES_OFF64_T				1
+
+/* Same for ino_t and ino64_t.  */
+#define __INO_T_MATCHES_INO64_T				1
+
+/* And for rlim_t and rlim64_t.  */
+#define __RLIM_T_MATCHES_RLIM64_T			1
+
+/* And for __blkcnt_t and __blkcnt64_t.  */
+#define __BLKCNT_T_TYPE_MATCHES_BLKCNT64_T_TYPE	1
+
+/* And for __fsblkcnt_t and __fsblkcnt64_t.  */
+#define __FSBLKCNT_T_TYPE_MATCHES_FSBLKCNT64_T_TYPE	1
+
+/* And for __fsbilcnt_t and __fsbilcnt64_t.  */
+#define __FSFILCNT_T_TYPE_MATCHES_FSFILCNT64_T_TYPE	1
+
+/* Number of descriptors that can fit in an `fd_set'.  */
+#define __FD_SETSIZE		1024
+
+#endif /* bits/typesizes.h */

sysdeps/unix/sysv/linux/aarch64/bits/utmp.h

@@ -0,0 +1,125 @@
+/* The `struct utmp' type, describing entries in the utmp file.
+   Linux/AArch64 version.
+
+   Copyright (C) 2017 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 _UTMP_H
+# error "Never include <bits/utmp.h> directly; use <utmp.h> instead."
+#endif
+
+#include <paths.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <bits/wordsize.h>
+
+
+#define UT_LINESIZE	32
+#define UT_NAMESIZE	32
+#define UT_HOSTSIZE	256
+
+
+/* The structure describing an entry in the database of
+   previous logins.  */
+struct lastlog
+  {
+#if __WORDSIZE == 32
+    int64_t ll_time;
+#else
+    __time_t ll_time;
+#endif
+    char ll_line[UT_LINESIZE];
+    char ll_host[UT_HOSTSIZE];
+  };
+
+
+/* The structure describing the status of a terminated process.  This
+   type is used in `struct utmp' below.  */
+struct exit_status
+  {
+    short int e_termination;	/* Process termination status.  */
+    short int e_exit;		/* Process exit status.  */
+  };
+
+
+/* The structure describing an entry in the user accounting database.  */
+struct utmp
+{
+  short int ut_type;		/* Type of login.  */
+  pid_t ut_pid;			/* Process ID of login process.  */
+  char ut_line[UT_LINESIZE];	/* Devicename.  */
+  char ut_id[4];		/* Inittab ID.  */
+  char ut_user[UT_NAMESIZE];	/* Username.  */
+  char ut_host[UT_HOSTSIZE];	/* Hostname for remote login.  */
+  struct exit_status ut_exit;	/* Exit status of a process marked
+				   as DEAD_PROCESS.  */
+/* The ut_session and ut_tv fields must be the same size when compiled
+   32- and 64-bit.  This allows data files and shared memory to be
+   shared between 32- and 64-bit applications.  */
+#if __WORDSIZE == 32
+  int64_t ut_session;		/* Session ID, used for windowing.  */
+  struct
+  {
+    int64_t tv_sec;		/* Seconds.  */
+    int64_t tv_usec;		/* Microseconds.  */
+  } ut_tv;			/* Time entry was made.  */
+#else
+  long int ut_session;		/* Session ID, used for windowing.  */
+  struct timeval ut_tv;		/* Time entry was made.  */
+#endif
+
+  int32_t ut_addr_v6[4];	/* Internet address of remote host.  */
+  char __glibc_reserved[20];		/* Reserved for future use.  */
+};
+
+/* Backwards compatibility hacks.  */
+#define ut_name		ut_user
+#ifndef _NO_UT_TIME
+/* We have a problem here: `ut_time' is also used otherwise.  Define
+   _NO_UT_TIME if the compiler complains.  */
+# define ut_time	ut_tv.tv_sec
+#endif
+#define ut_xtime	ut_tv.tv_sec
+#define ut_addr		ut_addr_v6[0]
+
+
+/* Values for the `ut_type' field of a `struct utmp'.  */
+#define EMPTY		0	/* No valid user accounting information.  */
+
+#define RUN_LVL		1	/* The system's runlevel.  */
+#define BOOT_TIME	2	/* Time of system boot.  */
+#define NEW_TIME	3	/* Time after system clock changed.  */
+#define OLD_TIME	4	/* Time when system clock changed.  */
+
+#define INIT_PROCESS	5	/* Process spawned by the init process.  */
+#define LOGIN_PROCESS	6	/* Session leader of a logged in user.  */
+#define USER_PROCESS	7	/* Normal process.  */
+#define DEAD_PROCESS	8	/* Terminated process.  */
+
+#define ACCOUNTING	9
+
+/* Old Linux name for the EMPTY type.  */
+#define UT_UNKNOWN	EMPTY
+
+
+/* Tell the user that we have a modern system with UT_HOST, UT_PID,
+   UT_TYPE, UT_ID and UT_TV fields.  */
+#define _HAVE_UT_TYPE	1
+#define _HAVE_UT_PID	1
+#define _HAVE_UT_ID	1
+#define _HAVE_UT_TV	1
+#define _HAVE_UT_HOST	1

sysdeps/unix/sysv/linux/aarch64/bits/utmpx.h

@@ -0,0 +1,104 @@
+/* Structures and definitions for the user accounting database.
+   Linux/AArch64 version.
+
+   Copyright (C) 2017 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 _UTMPX_H
+# error "Never include <bits/utmpx.h> directly; use <utmpx.h> instead."
+#endif
+
+#include <bits/types.h>
+#include <sys/time.h>
+#include <bits/wordsize.h>
+
+
+#ifdef __USE_GNU
+# include <paths.h>
+# define _PATH_UTMPX	_PATH_UTMP
+# define _PATH_WTMPX	_PATH_WTMP
+#endif
+
+
+#define __UT_LINESIZE	32
+#define __UT_NAMESIZE	32
+#define __UT_HOSTSIZE	256
+
+
+/* The structure describing the status of a terminated process.  This
+   type is used in `struct utmpx' below.  */
+struct __exit_status
+  {
+#ifdef __USE_GNU
+    short int e_termination;	/* Process termination status.  */
+    short int e_exit;		/* Process exit status.  */
+#else
+    short int __e_termination;	/* Process termination status.  */
+    short int __e_exit;		/* Process exit status.  */
+#endif
+  };
+
+
+/* The structure describing an entry in the user accounting database.  */
+struct utmpx
+{
+  short int ut_type;		/* Type of login.  */
+  __pid_t ut_pid;		/* Process ID of login process.  */
+  char ut_line[__UT_LINESIZE];	/* Devicename.  */
+  char ut_id[4];		/* Inittab ID. */
+  char ut_user[__UT_NAMESIZE];	/* Username.  */
+  char ut_host[__UT_HOSTSIZE];	/* Hostname for remote login.  */
+  struct __exit_status ut_exit;	/* Exit status of a process marked
+				   as DEAD_PROCESS.  */
+
+/* The fields ut_session and ut_tv must be the same size when compiled
+   32- and 64-bit.  This allows files and shared memory to be shared
+   between 32- and 64-bit applications.  */
+#if __WORDSIZE == 32
+  __int64_t ut_session;		/* Session ID, used for windowing.  */
+  struct
+  {
+    __int64_t tv_sec;		/* Seconds.  */
+    __int64_t tv_usec;		/* Microseconds.  */
+  } ut_tv;			/* Time entry was made.  */
+#else
+  long int ut_session;		/* Session ID, used for windowing.  */
+  struct timeval ut_tv;		/* Time entry was made.  */
+#endif
+  __int32_t ut_addr_v6[4];	/* Internet address of remote host.  */
+  char __glibc_reserved[20];		/* Reserved for future use.  */
+};
+
+
+/* Values for the `ut_type' field of a `struct utmpx'.  */
+#define EMPTY		0	/* No valid user accounting information.  */
+
+#ifdef __USE_GNU
+# define RUN_LVL	1	/* The system's runlevel.  */
+#endif
+#define BOOT_TIME	2	/* Time of system boot.  */
+#define NEW_TIME	3	/* Time after system clock changed.  */
+#define OLD_TIME	4	/* Time when system clock changed.  */
+
+#define INIT_PROCESS	5	/* Process spawned by the init process.  */
+#define LOGIN_PROCESS	6	/* Session leader of a logged in user.  */
+#define USER_PROCESS	7	/* Normal process.  */
+#define DEAD_PROCESS	8	/* Terminated process.  */
+
+#ifdef __USE_GNU
+# define ACCOUNTING	9	/* System accounting.  */
+#endif

sysdeps/unix/sysv/linux/aarch64/configure

@@ -1,8 +1,22 @@
 # This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
  # Local configure fragment for sysdeps/unix/sysv/linux/aarch64.
 
+if test $aarch64_config_abi = ilp32; then
+  arch_minimum_kernel=10.0.0
+  test -n "$libc_cv_slibdir" ||
+case "$prefix" in
+/usr | /usr/)
+  libc_cv_slibdir=/libilp32
+  libc_cv_rtlddir=/lib
+  if test "$libdir" = '${exec_prefix}/lib'; then
+    libdir='${exec_prefix}/libilp32';
+    # Locale data can be shared between 32-bit and 64-bit libraries.
+    libc_cv_complocaledir='${exec_prefix}/lib/locale'
+  fi
+  ;;
+esac
+else
   arch_minimum_kernel=3.7.0
-
   test -n "$libc_cv_slibdir" ||
 case "$prefix" in
 /usr | /usr/)
@@ -15,3 +29,6 @@ case "$prefix" in
   fi
   ;;
 esac
+fi
+
+ldd_rewrite_script=$dir/ldd-rewrite.sed

sysdeps/unix/sysv/linux/aarch64/configure.ac

@@ -1,6 +1,12 @@
 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
 # Local configure fragment for sysdeps/unix/sysv/linux/aarch64.
 
+if test $aarch64_config_abi = ilp32; then
+  arch_minimum_kernel=10.0.0
+  LIBC_SLIBDIR_RTLDDIR([libilp32], [lib])
+else
   arch_minimum_kernel=3.7.0
-
   LIBC_SLIBDIR_RTLDDIR([lib64], [lib])
+fi
+
+ldd_rewrite_script=$dir/ldd-rewrite.sed

sysdeps/unix/sysv/linux/aarch64/ilp32/Implies

@@ -0,0 +1,4 @@
+aarch64/nptl
+unix/sysv/linux/aarch64
+unix/sysv/linux/generic/wordsize-32
+unix/sysv/linux/generic

sysdeps/unix/sysv/linux/aarch64/ilp32/c++-types.data

@@ -0,0 +1,67 @@
+blkcnt64_t:x
+blkcnt_t:x
+blksize_t:i
+caddr_t:Pc
+clockid_t:i
+clock_t:l
+daddr_t:i
+dev_t:y
+fd_mask:l
+fsblkcnt64_t:y
+fsblkcnt_t:y
+fsfilcnt64_t:y
+fsfilcnt_t:y
+fsid_t:8__fsid_t
+gid_t:j
+id_t:j
+ino64_t:y
+ino_t:y
+int16_t:s
+int32_t:i
+int64_t:x
+int8_t:a
+intptr_t:i
+key_t:i
+loff_t:x
+mode_t:j
+nlink_t:j
+off64_t:x
+off_t:x
+pid_t:i
+pthread_attr_t:14pthread_attr_t
+pthread_barrier_t:17pthread_barrier_t
+pthread_barrierattr_t:21pthread_barrierattr_t
+pthread_cond_t:14pthread_cond_t
+pthread_condattr_t:18pthread_condattr_t
+pthread_key_t:j
+pthread_mutex_t:15pthread_mutex_t
+pthread_mutexattr_t:19pthread_mutexattr_t
+pthread_once_t:i
+pthread_rwlock_t:16pthread_rwlock_t
+pthread_rwlockattr_t:20pthread_rwlockattr_t
+pthread_spinlock_t:i
+pthread_t:m
+quad_t:x
+register_t:x
+rlim64_t:y
+rlim_t:y
+sigset_t:10__sigset_t
+size_t:m
+socklen_t:j
+ssize_t:l
+suseconds_t:l
+time_t:l
+u_char:h
+uid_t:j
+uint:j
+u_int:j
+u_int16_t:t
+u_int32_t:j
+u_int64_t:y
+u_int8_t:h
+ulong:m
+u_long:m
+u_quad_t:y
+useconds_t:j
+ushort:t
+u_short:t

sysdeps/unix/sysv/linux/aarch64/ilp32/kernel_stat.h

@@ -0,0 +1,3 @@
+#define XSTAT_IS_XSTAT64	1
+#define STATFS_IS_STATFS64	1
+#define STAT_IS_KERNEL_STAT

sysdeps/unix/sysv/linux/aarch64/ilp32/shlib-versions

@@ -0,0 +1,7 @@
+DEFAULT			GLIBC_2.27
+
+%ifdef HAVE_AARCH64_BE
+ld=ld-linux-aarch64_be_ilp32.so.1
+%else
+ld=ld-linux-aarch64_ilp32.so.1
+%endif

sysdeps/unix/sysv/linux/aarch64/ipc_priv.h

@@ -18,4 +18,8 @@
 
 #include <sys/ipc.h>  /* For __key_t  */
 
+#ifdef __LP64__
 # define __IPC_64	0x0
+#else /* __ILP32  */
+# define __IPC_64	0x100
+#endif

sysdeps/unix/sysv/linux/aarch64/kernel-features.h

@@ -21,3 +21,12 @@
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE_BACKWARDS 1
+
+#ifdef __ILP32__
+/* ARM fadvise64_64 reorganize the syscall arguments.  */
+# define __ASSUME_FADVISE64_64_6ARG	1
+
+/* Define this if your 32-bit syscall API requires 64-bit register
+   pairs to start with an even-number register.  */
+# define __ASSUME_ALIGNED_REGISTER_PAIRS	1
+#endif /* __ILP32__ */

sysdeps/unix/sysv/linux/aarch64/ldd-rewrite.sed

@@ -0,0 +1 @@
+s_^\(RTLDLIST=\)\(.*lib/\)\([^/]*\)\(-aarch64\)\(\|\_be\)\(\|\_ilp32\)\(.so\.[0-9.]*\)$_\1"\2\3-aarch64\5\7 \2\3-aarch64\5\_ilp32\7"_

sysdeps/unix/sysv/linux/aarch64/lp64/Implies

@@ -0,0 +1,4 @@
+aarch64/nptl
+unix/sysv/linux/aarch64
+unix/sysv/linux/generic
+unix/sysv/linux/wordsize-64

sysdeps/unix/sysv/linux/arm/readelflib.c

@@ -41,7 +41,11 @@ process_elf_file (const char *file_name, const char *lib, int *flag,
       ret = process_elf32_file (file_name, lib, flag, osversion, soname,
 				file_contents, file_length);
 
-      if (!ret && EF_ARM_EABI_VERSION (elf32_header->e_flags) == EF_ARM_EABI_VER5)
+      if (!ret && elf_header->e_machine == EM_AARCH64)
+	*flag = FLAG_AARCH64_LIB32|FLAG_ELF_LIBC6;
+      else if (!ret
+	       && EF_ARM_EABI_VERSION (elf32_header->e_flags)
+		  == EF_ARM_EABI_VER5)
 	{
 	  if (elf32_header->e_flags & EF_ARM_ABI_FLOAT_HARD)
 	    *flag = FLAG_ARM_LIBHF|FLAG_ELF_LIBC6;

sysdeps/unix/sysv/linux/bits/fcntl-linux.h

@@ -101,7 +101,7 @@
 #endif
 
 #ifndef F_GETLK
-# ifndef __USE_FILE_OFFSET64
+# if !defined (__USE_FILE_OFFSET64) && !defined (__OFF_T_MATCHES_OFF64_T)
 #  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).  */