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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-10-04 06:51:35 +0200
committerWaldemar Brodkorb <wbx@openadk.org>2017-02-01 17:48:38 +0100
commitdba942c80dc2cfa5768a856fff98e22a755fdd27 (patch)
tree371e775cb6dfec085945f6834aeb9d3b6de36fbe /libc/sysdeps/linux/aarch64
parent9b457baf8d46329f7d7ee2aa084022bb0df88551 (diff)
add experimental aarch64 support
Ported over from GNU C Library and runtime tested in Qemu.
Diffstat (limited to 'libc/sysdeps/linux/aarch64')
-rw-r--r--libc/sysdeps/linux/aarch64/Makefile9
-rw-r--r--libc/sysdeps/linux/aarch64/Makefile.arch5
-rw-r--r--libc/sysdeps/linux/aarch64/__longjmp.S107
-rw-r--r--libc/sysdeps/linux/aarch64/__syscall_error.c18
-rw-r--r--libc/sysdeps/linux/aarch64/bits/atomic.h172
-rw-r--r--libc/sysdeps/linux/aarch64/bits/endian.h30
-rw-r--r--libc/sysdeps/linux/aarch64/bits/fcntl.h329
-rw-r--r--libc/sysdeps/linux/aarch64/bits/kernel_types.h42
-rw-r--r--libc/sysdeps/linux/aarch64/bits/setjmp.h33
-rw-r--r--libc/sysdeps/linux/aarch64/bits/stackinfo.h33
-rw-r--r--libc/sysdeps/linux/aarch64/bits/syscalls.h106
-rw-r--r--libc/sysdeps/linux/aarch64/bits/uClibc_arch_features.h38
-rwxr-xr-xlibc/sysdeps/linux/aarch64/bits/uClibc_page.h25
-rw-r--r--libc/sysdeps/linux/aarch64/bits/wordsize.h18
-rw-r--r--libc/sysdeps/linux/aarch64/bsd-_setjmp.S1
-rw-r--r--libc/sysdeps/linux/aarch64/bsd-setjmp.S1
-rw-r--r--libc/sysdeps/linux/aarch64/clone.S85
-rw-r--r--libc/sysdeps/linux/aarch64/crt1.S89
-rw-r--r--libc/sysdeps/linux/aarch64/crti.S59
-rw-r--r--libc/sysdeps/linux/aarch64/crtn.S46
-rw-r--r--libc/sysdeps/linux/aarch64/jmpbuf-offsets.h57
-rw-r--r--libc/sysdeps/linux/aarch64/jmpbuf-unwind.h34
-rw-r--r--libc/sysdeps/linux/aarch64/setjmp.S59
-rw-r--r--libc/sysdeps/linux/aarch64/sys/procfs.h123
-rw-r--r--libc/sysdeps/linux/aarch64/sys/ucontext.h53
-rw-r--r--libc/sysdeps/linux/aarch64/sys/user.h37
-rw-r--r--libc/sysdeps/linux/aarch64/syscall.S42
-rw-r--r--libc/sysdeps/linux/aarch64/sysdep.h150
-rw-r--r--libc/sysdeps/linux/aarch64/vfork.S37
29 files changed, 1838 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/aarch64/Makefile b/libc/sysdeps/linux/aarch64/Makefile
new file mode 100644
index 000000000..86a32a613
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/Makefile
@@ -0,0 +1,9 @@
+# Makefile for uClibc-ng
+# Licensed under the LGPL v2.1, 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/aarch64/Makefile.arch b/libc/sysdeps/linux/aarch64/Makefile.arch
new file mode 100644
index 000000000..b38f760a8
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/Makefile.arch
@@ -0,0 +1,5 @@
+# Makefile for uClibc-ng
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+
+CSRC-y := __syscall_error.c
+SSRC-y := clone.S setjmp.S syscall.S __longjmp.S bsd-setjmp.S bsd-_setjmp.S vfork.S
diff --git a/libc/sysdeps/linux/aarch64/__longjmp.S b/libc/sysdeps/linux/aarch64/__longjmp.S
new file mode 100644
index 000000000..e4d11b165
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/__longjmp.S
@@ -0,0 +1,107 @@
+/* Copyright (C) 1997-2016 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 <sysdep.h>
+#include <jmpbuf-offsets.h>
+
+/* __longjmp(jmpbuf, val) */
+
+ENTRY (__longjmp)
+ cfi_def_cfa(x0, 0)
+ cfi_offset(x19, JB_X19<<3)
+ cfi_offset(x20, JB_X20<<3)
+ cfi_offset(x21, JB_X21<<3)
+ cfi_offset(x22, JB_X22<<3)
+ cfi_offset(x23, JB_X23<<3)
+ cfi_offset(x24, JB_X24<<3)
+ cfi_offset(x25, JB_X25<<3)
+ cfi_offset(x26, JB_X26<<3)
+ cfi_offset(x27, JB_X27<<3)
+ cfi_offset(x28, JB_X28<<3)
+ cfi_offset(x29, JB_X29<<3)
+ cfi_offset(x30, JB_LR<<3)
+
+ cfi_offset( d8, JB_D8<<3)
+ cfi_offset( d9, JB_D9<<3)
+ cfi_offset(d10, JB_D10<<3)
+ cfi_offset(d11, JB_D11<<3)
+ cfi_offset(d12, JB_D12<<3)
+ cfi_offset(d13, JB_D13<<3)
+ cfi_offset(d14, JB_D14<<3)
+ cfi_offset(d15, JB_D15<<3)
+
+ ldp x19, x20, [x0, #JB_X19<<3]
+ ldp x21, x22, [x0, #JB_X21<<3]
+ ldp x23, x24, [x0, #JB_X23<<3]
+ ldp x25, x26, [x0, #JB_X25<<3]
+ ldp x27, x28, [x0, #JB_X27<<3]
+ ldp x29, x30, [x0, #JB_X29<<3]
+
+ /* longjmp probe takes 3 arguments, address of jump buffer as
+ first argument (8@x0), return value as second argument (-4@x1),
+ and target address (8@x30), respectively. */
+ //LIBC_PROBE (longjmp, 3, 8@x0, -4@x1, 8@x30)
+ ldp d8, d9, [x0, #JB_D8<<3]
+ ldp d10, d11, [x0, #JB_D10<<3]
+ ldp d12, d13, [x0, #JB_D12<<3]
+ ldp d14, d15, [x0, #JB_D14<<3]
+
+ /* Originally this was implemented with a series of
+ .cfi_restore() directives.
+
+ The theory was that cfi_restore should revert to previous
+ frame value is the same as the current value. In practice
+ this doesn't work, even after cfi_restore() gdb continues
+ to try to recover a previous frame value offset from x0,
+ which gets stuffed after a few more instructions. The
+ cfi_same_value() mechanism appears to work fine. */
+
+ cfi_same_value(x19)
+ cfi_same_value(x20)
+ cfi_same_value(x21)
+ cfi_same_value(x22)
+ cfi_same_value(x23)
+ cfi_same_value(x24)
+ cfi_same_value(x25)
+ cfi_same_value(x26)
+ cfi_same_value(x27)
+ cfi_same_value(x28)
+ cfi_same_value(x29)
+ cfi_same_value(x30)
+ cfi_same_value(d8)
+ cfi_same_value(d9)
+ cfi_same_value(d10)
+ cfi_same_value(d11)
+ cfi_same_value(d12)
+ cfi_same_value(d13)
+ cfi_same_value(d14)
+ cfi_same_value(d15)
+ ldr x5, [x0, #JB_SP<<3]
+ mov sp, x5
+
+ /* longjmp_target probe takes 3 arguments, address of jump buffer
+ as first argument (8@x0), return value as second argument (-4@x1),
+ and target address (8@x30), respectively. */
+ //LIBC_PROBE (longjmp_target, 3, 8@x0, -4@x1, 8@x30)
+ cmp x1, #0
+ mov x0, #1
+ csel x0, x1, x0, ne
+ /* Use br instead of ret because ret is guaranteed to mispredict */
+ br x30
+END (__longjmp)
+libc_hidden_def(__longjmp)
diff --git a/libc/sysdeps/linux/aarch64/__syscall_error.c b/libc/sysdeps/linux/aarch64/__syscall_error.c
new file mode 100644
index 000000000..2b642e816
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/__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, 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/aarch64/bits/atomic.h b/libc/sysdeps/linux/aarch64/bits/atomic.h
new file mode 100644
index 000000000..66e2f57d6
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/atomic.h
@@ -0,0 +1,172 @@
+/* Copyright (C) 2003-2017 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 _AARCH64_ATOMIC_MACHINE_H
+#define _AARCH64_ATOMIC_MACHINE_H 1
+
+#define typeof __typeof__
+
+#include <stdint.h>
+#include <sysdep.h>
+
+typedef int8_t atomic8_t;
+typedef int16_t atomic16_t;
+typedef int32_t atomic32_t;
+typedef int64_t atomic64_t;
+
+typedef uint8_t uatomic8_t;
+typedef uint16_t uatomic16_t;
+typedef uint32_t uatomic32_t;
+typedef uint64_t uatomic64_t;
+
+typedef intptr_t atomicptr_t;
+typedef uintptr_t uatomicptr_t;
+typedef intmax_t atomic_max_t;
+typedef uintmax_t uatomic_max_t;
+
+#define __HAVE_64B_ATOMICS 1
+#define USE_ATOMIC_COMPILER_BUILTINS 1
+
+/* Compare and exchange.
+ For all "bool" routines, we return FALSE if exchange succesful. */
+
+# define __arch_compare_and_exchange_bool_8_int(mem, newval, oldval, model) \
+ ({ \
+ typeof (*mem) __oldval = (oldval); \
+ !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \
+ model, __ATOMIC_RELAXED); \
+ })
+
+# define __arch_compare_and_exchange_bool_16_int(mem, newval, oldval, model) \
+ ({ \
+ typeof (*mem) __oldval = (oldval); \
+ !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \
+ model, __ATOMIC_RELAXED); \
+ })
+
+# define __arch_compare_and_exchange_bool_32_int(mem, newval, oldval, model) \
+ ({ \
+ typeof (*mem) __oldval = (oldval); \
+ !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \
+ model, __ATOMIC_RELAXED); \
+ })
+
+# define __arch_compare_and_exchange_bool_64_int(mem, newval, oldval, model) \
+ ({ \
+ typeof (*mem) __oldval = (oldval); \
+ !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \
+ model, __ATOMIC_RELAXED); \
+ })
+
+# define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \
+ ({ \
+ typeof (*mem) __oldval = (oldval); \
+ __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \
+ model, __ATOMIC_RELAXED); \
+ __oldval; \
+ })
+
+# define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \
+ ({ \
+ typeof (*mem) __oldval = (oldval); \
+ __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \
+ model, __ATOMIC_RELAXED); \
+ __oldval; \
+ })
+
+# define __arch_compare_and_exchange_val_32_int(mem, newval, oldval, model) \
+ ({ \
+ typeof (*mem) __oldval = (oldval); \
+ __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \
+ model, __ATOMIC_RELAXED); \
+ __oldval; \
+ })
+
+# define __arch_compare_and_exchange_val_64_int(mem, newval, oldval, model) \
+ ({ \
+ typeof (*mem) __oldval = (oldval); \
+ __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \
+ model, __ATOMIC_RELAXED); \
+ __oldval; \
+ })
+
+
+/* Compare and exchange with "acquire" semantics, ie barrier after. */
+
+# define atomic_compare_and_exchange_bool_acq(mem, new, old) \
+ __atomic_bool_bysize (__arch_compare_and_exchange_bool, int, \
+ mem, new, old, __ATOMIC_ACQUIRE)
+
+# define atomic_compare_and_exchange_val_acq(mem, new, old) \
+ __atomic_val_bysize (__arch_compare_and_exchange_val, int, \
+ mem, new, old, __ATOMIC_ACQUIRE)
+
+/* Compare and exchange with "release" semantics, ie barrier before. */
+
+# define atomic_compare_and_exchange_val_rel(mem, new, old) \
+ __atomic_val_bysize (__arch_compare_and_exchange_val, int, \
+ mem, new, old, __ATOMIC_RELEASE)
+
+
+/* Atomic exchange (without compare). */
+
+# define __arch_exchange_8_int(mem, newval, model) \
+ __atomic_exchange_n (mem, newval, model)
+
+# define __arch_exchange_16_int(mem, newval, model) \
+ __atomic_exchange_n (mem, newval, model)
+
+# define __arch_exchange_32_int(mem, newval, model) \
+ __atomic_exchange_n (mem, newval, model)
+
+# define __arch_exchange_64_int(mem, newval, model) \
+ __atomic_exchange_n (mem, newval, model)
+
+# define atomic_exchange_acq(mem, value) \
+ __atomic_val_bysize (__arch_exchange, int, mem, value, __ATOMIC_ACQUIRE)
+
+# define atomic_exchange_rel(mem, value) \
+ __atomic_val_bysize (__arch_exchange, int, mem, value, __ATOMIC_RELEASE)
+
+
+/* Atomically add value and return the previous (unincremented) value. */
+
+# define __arch_exchange_and_add_8_int(mem, value, model) \
+ __atomic_fetch_add (mem, value, model)
+
+# define __arch_exchange_and_add_16_int(mem, value, model) \
+ __atomic_fetch_add (mem, value, model)
+
+# define __arch_exchange_and_add_32_int(mem, value, model) \
+ __atomic_fetch_add (mem, value, model)
+
+# define __arch_exchange_and_add_64_int(mem, value, model) \
+ __atomic_fetch_add (mem, value, model)
+
+# define atomic_exchange_and_add_acq(mem, value) \
+ __atomic_val_bysize (__arch_exchange_and_add, int, mem, value, \
+ __ATOMIC_ACQUIRE)
+
+# define atomic_exchange_and_add_rel(mem, value) \
+ __atomic_val_bysize (__arch_exchange_and_add, int, mem, value, \
+ __ATOMIC_RELEASE)
+
+/* Barrier macro. */
+#define atomic_full_barrier() __sync_synchronize()
+
+#endif
diff --git a/libc/sysdeps/linux/aarch64/bits/endian.h b/libc/sysdeps/linux/aarch64/bits/endian.h
new file mode 100644
index 000000000..a32ebc0d8
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/endian.h
@@ -0,0 +1,30 @@
+/* Copyright (C) 1997-2016 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 _ENDIAN_H
+# error "Never use <bits/endian.h> directly; include <endian.h> instead."
+#endif
+
+/* AArch64 can be either big or little endian. */
+#ifdef __AARCH64EB__
+# define __BYTE_ORDER __BIG_ENDIAN
+#else
+# define __BYTE_ORDER __LITTLE_ENDIAN
+#endif
+
+#define __FLOAT_WORD_ORDER __BYTE_ORDER
diff --git a/libc/sysdeps/linux/aarch64/bits/fcntl.h b/libc/sysdeps/linux/aarch64/bits/fcntl.h
new file mode 100644
index 000000000..d05798f31
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/fcntl.h
@@ -0,0 +1,329 @@
+/* O_*, F_*, FD_* bit values for the AArch64 Linux ABI.
+ Copyright (C) 2011-2016 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
+
+#include <sys/types.h>
+#ifdef __USE_GNU
+# include <bits/uio.h>
+#endif
+
+/* open/fcntl. */
+#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 04010000
+#define O_FSYNC O_SYNC
+#define O_ASYNC 020000
+
+#ifdef __USE_GNU
+# define O_DIRECTORY 040000
+# define O_NOFOLLOW 0100000
+# define O_DIRECT 0200000
+# define O_NOATIME 01000000
+# define O_CLOEXEC 02000000
+# define O_PATH 010000000
+#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 0
+#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 5 /* Get record locking info. */
+#define F_SETLK64 6 /* Set record locking info (non-blocking). */
+#define F_SETLKW64 7 /* 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. */
+# define F_SETOWN_EX 15 /* Get owner (thread receiving SIGIO). */
+# define F_GETOWN_EX 16 /* Set owner (thread receiving SIGIO). */
+#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 notifications on a directory. */
+# define F_SETPIPE_SZ 1031 /* Set pipe page size array. */
+# define F_GETPIPE_SZ 1032 /* Set pipe page size array. */
+#endif
+#ifdef __USE_XOPEN2K8
+# define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
+ close-on-exit set. */
+#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 attributes. */
+# 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'). */
+ __off_t l_start; /* Offset where the lock begins. */
+ __off_t l_len; /* Size of the locked area; zero means until EOF. */
+ __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
+
+
+#ifdef __USE_GNU
+/* Owner types. */
+enum __pid_type
+ {
+ F_OWNER_TID = 0, /* Kernel thread. */
+ F_OWNER_PID, /* Process. */
+ F_OWNER_PGRP, /* Process group. */
+ F_OWNER_GID = F_OWNER_PGRP /* Alternative, obsolete name. */
+ };
+
+/* Structure to use with F_GETOWN_EX and F_SETOWN_EX. */
+struct f_owner_ex
+ {
+ enum __pid_type type; /* Owner type of ID. */
+ __pid_t pid; /* ID of owner. */
+ };
+#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. */
+
+
+/* Flags for fallocate. */
+# define FALLOC_FL_KEEP_SIZE 1 /* Don't extend size of file
+ even if offset + len is
+ greater than file size. */
+# define FALLOC_FL_PUNCH_HOLE 2 /* Create a hole in the file. */
+# define FALLOC_FL_COLLAPSE_RANGE 8 /* Remove a range of a file
+ without leaving a
+ hole. */
+# define FALLOC_FL_ZERO_RANGE 16 /* Convert a range of a
+ file to zeros. */
+
+
+/* File handle structure. */
+struct file_handle
+{
+ unsigned int handle_bytes;
+ int handle_type;
+ /* File identifier. */
+ unsigned char f_handle[0];
+};
+
+/* Maximum handle size (for now). */
+# define MAX_HANDLE_SZ 128
+#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.
+
+ This function is a possible cancellation point and therefore not
+ marked with __THROW. */
+extern int sync_file_range (int __fd, __off64_t __offset, __off64_t __count,
+ unsigned int __flags);
+
+
+/* Splice address range into a pipe.
+
+ This function is a possible cancellation point and therefore not
+ marked with __THROW. */
+extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
+ size_t __count, unsigned int __flags);
+
+/* Splice two files together.
+
+ This function is a possible cancellation point and therefore not
+ marked with __THROW. */
+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.
+
+ This function is a possible cancellation point and therefore not
+ marked with __THROW. */
+extern ssize_t tee (int __fdin, int __fdout, size_t __len,
+ unsigned int __flags);
+
+/* Reserve storage for the data of the file associated with FD.
+
+ This function is a possible cancellation point and therefore not
+ marked with __THROW. */
+# ifndef __USE_FILE_OFFSET64
+extern int fallocate (int __fd, int __mode, __off_t __offset, __off_t __len);
+# else
+# ifdef __REDIRECT
+extern int __REDIRECT (fallocate, (int __fd, int __mode, __off64_t __offset,
+ __off64_t __len),
+ fallocate64);
+# else
+# define fallocate fallocate64
+# endif
+# endif
+# ifdef __USE_LARGEFILE64
+extern int fallocate64 (int __fd, int __mode, __off64_t __offset,
+ __off64_t __len);
+# endif
+
+
+/* Map file name to file handle. */
+extern int name_to_handle_at (int __dfd, const char *__name,
+ struct file_handle *__handle, int *__mnt_id,
+ int __flags) __THROW;
+
+/* Open file using the file handle.
+
+ This function is a possible cancellation point and therefore not
+ marked with __THROW. */
+extern int open_by_handle_at (int __mountdirfd, struct file_handle *__handle,
+ int __flags);
+
+#endif /* use GNU */
+
+__END_DECLS
diff --git a/libc/sysdeps/linux/aarch64/bits/kernel_types.h b/libc/sysdeps/linux/aarch64/bits/kernel_types.h
new file mode 100644
index 000000000..832b17674
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/kernel_types.h
@@ -0,0 +1,42 @@
+/* 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
+ */
+#ifndef __ASM_GENERIC_POSIX_TYPES_H
+#define __ASM_GENERIC_POSIX_TYPES_H
+
+typedef unsigned long __kernel_dev_t;
+typedef unsigned long __kernel_ino_t;
+typedef unsigned int __kernel_mode_t;
+typedef unsigned int __kernel_nlink_t;
+typedef long __kernel_off_t;
+typedef int __kernel_pid_t;
+typedef int __kernel_ipc_pid_t;
+typedef unsigned int __kernel_uid_t;
+typedef unsigned int __kernel_gid_t;
+typedef unsigned long __kernel_size_t;
+typedef long __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 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 short __kernel_old_uid_t;
+typedef unsigned short __kernel_old_gid_t;
+typedef long long __kernel_loff_t;
+typedef unsigned int __kernel_old_dev_t;
+typedef long __kernel_long_t;
+typedef unsigned long __kernel_ulong_t;
+
+typedef struct {
+ int val[2];
+} __kernel_fsid_t;
+
+#endif /* __ASM_GENERIC_POSIX_TYPES_H */
diff --git a/libc/sysdeps/linux/aarch64/bits/setjmp.h b/libc/sysdeps/linux/aarch64/bits/setjmp.h
new file mode 100644
index 000000000..fff8616c6
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/setjmp.h
@@ -0,0 +1,33 @@
+/* Copyright (C) 1997-2016 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_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
+
+#ifndef _ASM
+/* Jump buffer contains:
+ x19-x28, x29(fp), x30(lr), (x31)sp, d8-d15. Other registers are not
+ saved. */
+__extension__ typedef unsigned long long __jmp_buf [22];
+
+#endif
+#endif
diff --git a/libc/sysdeps/linux/aarch64/bits/stackinfo.h b/libc/sysdeps/linux/aarch64/bits/stackinfo.h
new file mode 100644
index 000000000..78f326203
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/stackinfo.h
@@ -0,0 +1,33 @@
+/* Copyright (C) 2001-2016 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/>. */
+
+/* This file contains a bit of information about the stack allocation
+ of the processor. */
+
+#ifndef _STACKINFO_H
+#define _STACKINFO_H 1
+
+#include <elf.h>
+
+/* On AArch64 the stack grows down. */
+#define _STACK_GROWS_DOWN 1
+
+/* Default to a non-executable stack. */
+#define DEFAULT_STACK_PERMS (PF_R|PF_W)
+
+#endif /* stackinfo.h */
diff --git a/libc/sysdeps/linux/aarch64/bits/syscalls.h b/libc/sysdeps/linux/aarch64/bits/syscalls.h
new file mode 100644
index 000000000..3c0d840ea
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/syscalls.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2016 by Waldemar Brodkorb <wbx@uclibc-ng.org>
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ * ported from GNU libc
+ */
+
+/* Copyright (C) 2005-2016 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_SYSCALLS_H
+#define _BITS_SYSCALLS_H
+#ifndef _SYSCALL_H
+# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
+#endif
+
+#ifndef __ASSEMBLER__
+#include <errno.h>
+
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+ ({ long _sys_result; \
+ { \
+ register long _x8 __asm__ ("x8"); \
+ LOAD_ARGS_##nr (args) \
+ _x8 = (name); \
+ \
+ __asm__ volatile ( \
+ "svc 0 // syscall " # name \
+ : "=r" (_x0) : "r"(_x8) ASM_ARGS_##nr \
+ : "memory"); \
+ \
+ _sys_result = _x0; \
+ } \
+ _sys_result; })
+
+/* Macros for setting up inline __asm__ input regs */
+# define ASM_ARGS_0
+# define ASM_ARGS_1 , "r" (_x0)
+# define ASM_ARGS_2 ASM_ARGS_1, "r" (_x1)
+# define ASM_ARGS_3 ASM_ARGS_2, "r" (_x2)
+# define ASM_ARGS_4 ASM_ARGS_3, "r" (_x3)
+# define ASM_ARGS_5 ASM_ARGS_4, "r" (_x4)
+# define ASM_ARGS_6 ASM_ARGS_5, "r" (_x5)
+# define ASM_ARGS_7 ASM_ARGS_6, "r" (_x6)
+
+/* Macros for converting sys-call wrapper args into sys call args */
+# define LOAD_ARGS_0() \
+ register long _x0 __asm__ ("x0");
+# define LOAD_ARGS_1(x0) \
+ long _x0tmp; \
+ LOAD_ARGS_0 () \
+ _x0tmp = (long) (x0); \
+ _x0 = _x0tmp;
+# define LOAD_ARGS_2(x0, x1) \
+ register long _x1 __asm__ ("x1"); \
+ long _x1tmp; \
+ LOAD_ARGS_1 (x0) \
+ _x1tmp = (long) (x1); \
+ _x1 = _x1tmp;
+# define LOAD_ARGS_3(x0, x1, x2) \
+ register long _x2 __asm__ ("x2"); \
+ long _x2tmp; \
+ LOAD_ARGS_2 (x0, x1) \
+ _x2tmp = (long) (x2); \
+ _x2 = _x2tmp;
+# define LOAD_ARGS_4(x0, x1, x2, x3) \
+ register long _x3 __asm__ ("x3"); \
+ long _x3tmp; \
+ LOAD_ARGS_3 (x0, x1, x2) \
+ _x3tmp = (long) (x3); \
+ _x3 = _x3tmp;
+# define LOAD_ARGS_5(x0, x1, x2, x3, x4) \
+ register long _x4 __asm__ ("x4"); \
+ long _x4tmp; \
+ LOAD_ARGS_4 (x0, x1, x2, x3) \
+ _x4tmp = (long) (x4); \
+ _x4 = _x4tmp;
+# define LOAD_ARGS_6(x0, x1, x2, x3, x4, x5) \
+ register long _x5 __asm__ ("x5"); \
+ long _x5tmp; \
+ LOAD_ARGS_5 (x0, x1, x2, x3, x4) \
+ _x5tmp = (long) (x5); \
+ _x5 = _x5tmp;
+# define LOAD_ARGS_7(x0, x1, x2, x3, x4, x5, x6)\
+ register long _x6 __asm__ ("x6"); \
+ long _x6tmp; \
+ LOAD_ARGS_6 (x0, x1, x2, x3, x4, x5) \
+ _x6tmp = (long) (x6); \
+ _x6 = _x6tmp;
+
+#endif /* ! __ASSEMBLER__ */
+#endif /* _BITS_SYSCALLS_H */
diff --git a/libc/sysdeps/linux/aarch64/bits/uClibc_arch_features.h b/libc/sysdeps/linux/aarch64/bits/uClibc_arch_features.h
new file mode 100644
index 000000000..7cae090ec
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/uClibc_arch_features.h
@@ -0,0 +1,38 @@
+/*
+ * Track misc arch-specific features that aren't config options
+ */
+
+#ifndef _BITS_UCLIBC_ARCH_FEATURES_H
+#define _BITS_UCLIBC_ARCH_FEATURES_H
+
+/* instruction used when calling abort() to kill yourself */
+#define __UCLIBC_ABORT_INSTRUCTION__ "bl abort"
+
+/* can your target use syscall6() for mmap ? */
+#define __UCLIBC_MMAP_HAS_6_ARGS__
+
+/* does your target have a broken create_module() ? */
+#define __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 supports .weak */
+#define __UCLIBC_HAVE_ASM_WEAK_DIRECTIVE__
+
+/* define if target supports .weakext */
+#undef __UCLIBC_HAVE_ASM_WEAKEXT_DIRECTIVE__
+
+/* define if target supports CFI pseudo ops */
+#define __UCLIBC_HAVE_ASM_CFI_DIRECTIVES__
+
+/* define if target supports IEEE signed zero floats */
+#define __UCLIBC_HAVE_SIGNED_ZERO__
+
+/* only weird assemblers generally need this */
+#undef __UCLIBC_ASM_LINE_SEP__
+
+#endif /* _BITS_UCLIBC_ARCH_FEATURES_H */
diff --git a/libc/sysdeps/linux/aarch64/bits/uClibc_page.h b/libc/sysdeps/linux/aarch64/bits/uClibc_page.h
new file mode 100755
index 000000000..4f92abcf8
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/uClibc_page.h
@@ -0,0 +1,25 @@
+/*
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _UCLIBC_PAGE_H
+#define _UCLIBC_PAGE_H
+
+/*
+ * AARCH64 supports 4k, 16k, 64k pages (build time).
+ */
+
+#include <features.h>
+
+#if defined(__CONFIG_AARCH64_PAGE_SIZE_64K__)
+#define PAGE_SHIFT 16
+#elif defined(__CONFIG_AARCH64_PAGE_SIZE_16K__)
+#define PAGE_SHIFT 14
+#else
+#define PAGE_SHIFT 12
+#endif
+
+#define PAGE_SIZE (1UL << PAGE_SHIFT)
+#define PAGE_MASK (~(PAGE_SIZE-1))
+
+#endif /* _UCLIBC_PAGE_H */
diff --git a/libc/sysdeps/linux/aarch64/bits/wordsize.h b/libc/sysdeps/linux/aarch64/bits/wordsize.h
new file mode 100644
index 000000000..0944f9e26
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/wordsize.h
@@ -0,0 +1,18 @@
+/* Copyright (C) 1999-2016 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/>. */
+
+#define __WORDSIZE 64
diff --git a/libc/sysdeps/linux/aarch64/bsd-_setjmp.S b/libc/sysdeps/linux/aarch64/bsd-_setjmp.S
new file mode 100644
index 000000000..4e6a2da56
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bsd-_setjmp.S
@@ -0,0 +1 @@
+/* _setjmp is in setjmp.S */
diff --git a/libc/sysdeps/linux/aarch64/bsd-setjmp.S b/libc/sysdeps/linux/aarch64/bsd-setjmp.S
new file mode 100644
index 000000000..1da848d2f
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bsd-setjmp.S
@@ -0,0 +1 @@
+/* setjmp is in setjmp.S */
diff --git a/libc/sysdeps/linux/aarch64/clone.S b/libc/sysdeps/linux/aarch64/clone.S
new file mode 100644
index 000000000..7437eec8d
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/clone.S
@@ -0,0 +1,85 @@
+/* Copyright (C) 1996-2017 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/>. */
+
+/* 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 <sysdep.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+
+#define CLONE_VM_BIT 8
+#define CLONE_VM (1 << CLONE_VM_BIT)
+
+#define CLONE_THREAD_BIT 16
+#define CLONE_THREAD (1 << CLONE_THREAD_BIT)
+
+/* int clone(int (*fn)(void *arg), x0
+ void *child_stack, x1
+ int flags, x2
+ void *arg, x3
+ pid_t *ptid, x4
+ struct user_desc *tls, x5
+ pid_t *ctid); x6
+ */
+ .text
+ENTRY(__clone)
+ /* Save args for the child. */
+ mov x10, x0
+ mov x11, x2
+ mov x12, x3
+
+ /* Sanity check args. */
+ mov x0, #-EINVAL
+ cbz x10, .Lsyscall_error
+ cbz x1, .Lsyscall_error
+
+ /* Do the system call. */
+ /* X0:flags, x1:newsp, x2:parenttidptr, x3:newtls, x4:childtid. */
+ mov x0, x2 /* flags */
+ /* New sp is already in x1. */
+ mov x2, x4 /* ptid */
+ mov x3, x5 /* tls */
+ mov x4, x6 /* ctid */
+ mov x8, #SYS_ify(clone)
+ svc 0x0
+
+ cmp x0, #0
+ beq thread_start
+ blt .Lsyscall_error
+ RET
+PSEUDO_END (__clone)
+
+ .align 4
+ .type thread_start, %function
+thread_start:
+ cfi_startproc
+ cfi_undefined (x30)
+ mov x29, 0
+
+ /* Pick the function arg and execute. */
+ mov x0, x12
+ blr x10
+
+ /* We are done, pass the return value through x0. */
+ b HIDDEN_JUMPTARGET(_exit)
+ cfi_endproc
+ .size thread_start, .-thread_start
+
+libc_hidden_def (__clone)
+weak_alias (__clone, clone)
diff --git a/libc/sysdeps/linux/aarch64/crt1.S b/libc/sysdeps/linux/aarch64/crt1.S
new file mode 100644
index 000000000..09d0327ac
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/crt1.S
@@ -0,0 +1,89 @@
+/* Copyright (C) 1995-2016 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/>. */
+
+/* This is the canonical entry point, usually the first thing in the text
+ segment.
+
+ Note that the code in the .init section has already been run.
+ This includes _init and _libc_init
+
+
+ At this entry point, most registers' values are unspecified, except:
+
+ x0 Contains a function pointer to be registered with `atexit'.
+ This is how the dynamic linker arranges to have DT_FINI
+ functions called for shared libraries that have been loaded
+ before this code runs.
+
+ sp The stack contains the arguments and environment:
+ 0(sp) argc
+ 8(sp) argv[0]
+ ...
+ (8*argc)(sp) NULL
+ (8*(argc+1))(sp) envp[0]
+ ...
+ NULL
+ */
+
+ .text
+ .globl _start
+ .type _start,#function
+_start:
+ /* Create an initial frame with 0 LR and FP */
+ mov x29, #0
+ mov x30, #0
+
+ /* Setup _fini in argument register */
+ mov x5, x0
+
+ /* Load argc and a pointer to argv */
+ ldr x1, [sp, #0]
+ add x2, sp, #8
+
+ /* Setup stack limit in argument register */
+ mov x6, sp
+
+#ifdef __PIC__
+ adrp x0, :got:main
+ ldr x0, [x0, #:got_lo12:main]
+
+ adrp x3, :got:_init
+ ldr x3, [x3, #:got_lo12:_init]
+
+ adrp x4, :got:_fini
+ ldr x4, [x4, #:got_lo12:_fini]
+#else
+ /* Set up the other arguments in registers */
+ ldr x0, =main
+ ldr x3, =_init
+ ldr x4, =_fini
+#endif
+
+ /* Let the libc call main and exit with its return code. */
+ bl __uClibc_main
+
+ /* should never get here....*/
+ bl abort
+
+ /* Define a symbol for the first piece of initialized data. */
+ .data
+ .globl __data_start
+__data_start:
+ .long 0
+ .weak data_start
+ data_start = __data_start
diff --git a/libc/sysdeps/linux/aarch64/crti.S b/libc/sysdeps/linux/aarch64/crti.S
new file mode 100644
index 000000000..49c57e4c4
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/crti.S
@@ -0,0 +1,59 @@
+/* Special .init and .fini section support for AArch64.
+ Copyright (C) 1995-2016 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.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The GNU Lesser General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
+ Note that people who make modified versions of this file are not
+ obligated to grant this special exception for their modified
+ versions; it is their choice whether to do so. The GNU Lesser
+ General Public License gives permission to release a modified
+ version without this exception; this exception also makes it
+ possible to release a modified version which carries forward this
+ exception.
+
+ 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/>. */
+
+/* crti.S puts a function prologue at the beginning of the .init and
+ .fini sections and defines global symbols for those addresses, so
+ they can be called as functions. The symbols _init and _fini are
+ magic and cause the linker to emit DT_INIT and DT_FINI. */
+
+#include <libc-symbols.h>
+
+
+ .section .init,"ax",%progbits
+ .align 2
+ .global _init
+ .type _init, %function
+_init:
+ stp x29, x30, [sp, -16]!
+ mov x29, sp
+
+ .section .fini,"ax",%progbits
+ .align 2
+ .global _fini
+ .type _fini, %function
+_fini:
+ stp x29, x30, [sp, -16]!
+ mov x29, sp
diff --git a/libc/sysdeps/linux/aarch64/crtn.S b/libc/sysdeps/linux/aarch64/crtn.S
new file mode 100644
index 000000000..33d5f3d82
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/crtn.S
@@ -0,0 +1,46 @@
+/* Special .init and .fini section support for AArch64.
+ Copyright (C) 1995-2016 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.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The GNU Lesser General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
+ Note that people who make modified versions of this file are not
+ obligated to grant this special exception for their modified
+ versions; it is their choice whether to do so. The GNU Lesser
+ General Public License gives permission to release a modified
+ version without this exception; this exception also makes it
+ possible to release a modified version which carries forward this
+ exception.
+
+ 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/>. */
+
+/* crtn.S puts function epilogues in the .init and .fini sections
+ corresponding to the prologues in crti.S. */
+
+ .section .init,"ax",%progbits
+ ldp x29, x30, [sp], 16
+ RET
+
+ .section .fini,"ax",%progbits
+ ldp x29, x30, [sp], 16
+ RET
diff --git a/libc/sysdeps/linux/aarch64/jmpbuf-offsets.h b/libc/sysdeps/linux/aarch64/jmpbuf-offsets.h
new file mode 100644
index 000000000..ab00cef26
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/jmpbuf-offsets.h
@@ -0,0 +1,57 @@
+/* Copyright (C) 2006-2016 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/>. */
+
+#define JB_X19 0
+#define JB_X20 1
+#define JB_X21 2
+#define JB_X22 3
+#define JB_X23 4
+#define JB_X24 5
+#define JB_X25 6
+#define JB_X26 7
+#define JB_X27 8
+#define JB_X28 9
+#define JB_X29 10
+#define JB_LR 11
+#define JB_SP 13
+
+#define JB_D8 14
+#define JB_D9 15
+#define JB_D10 16
+#define JB_D11 17
+#define JB_D12 18
+#define JB_D13 19
+#define JB_D14 20
+#define JB_D15 21
+
+#ifndef __ASSEMBLER__
+#include <setjmp.h>
+#include <stdint.h>
+#include <sysdep.h>
+
+static inline uintptr_t __attribute__ ((unused))
+_jmpbuf_sp (__jmp_buf jmpbuf)
+{
+ uintptr_t sp = jmpbuf[JB_SP];
+ return sp;
+}
+#endif
+
+/* Helper for generic ____longjmp_chk(). */
+#define JB_FRAME_ADDRESS(buf) \
+ ((void *) _jmpbuf_sp (buf))
diff --git a/libc/sysdeps/linux/aarch64/jmpbuf-unwind.h b/libc/sysdeps/linux/aarch64/jmpbuf-unwind.h
new file mode 100644
index 000000000..77bad1d41
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/jmpbuf-unwind.h
@@ -0,0 +1,34 @@
+/* Copyright (C) 2005-2016 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 <setjmp.h>
+#include <jmpbuf-offsets.h>
+#include <stdint.h>
+#include <unwind.h>
+
+/* Test if longjmp to JMPBUF would unwind the frame
+ containing a local variable at ADDRESS. */
+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
+ ((void *) (address) < (void *) demangle (jmpbuf[JB_SP]))
+
+#define _JMPBUF_CFA_UNWINDS_ADJ(jmpbuf, context, adj) \
+ _JMPBUF_UNWINDS_ADJ (jmpbuf, (void *) _Unwind_GetCFA (context), adj)
+
+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
+ ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
+
diff --git a/libc/sysdeps/linux/aarch64/setjmp.S b/libc/sysdeps/linux/aarch64/setjmp.S
new file mode 100644
index 000000000..b3d616222
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/setjmp.S
@@ -0,0 +1,59 @@
+/* Copyright (C) 1997-2016 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 <sysdep.h>
+#include <jmpbuf-offsets.h>
+
+ /* Keep traditional entry points in with sigsetjmp(). */
+ENTRY (setjmp)
+ mov x1, #1
+ b 1f
+END (setjmp)
+
+ENTRY (_setjmp)
+ mov x1, #0
+ b 1f
+END (_setjmp)
+libc_hidden_def (_setjmp)
+
+ENTRY (__sigsetjmp)
+
+1:
+ stp x19, x20, [x0, #JB_X19<<3]
+ stp x21, x22, [x0, #JB_X21<<3]
+ stp x23, x24, [x0, #JB_X23<<3]
+ stp x25, x26, [x0, #JB_X25<<3]
+ stp x27, x28, [x0, #JB_X27<<3]
+
+ stp x29, x30, [x0, #JB_X29<<3]
+
+ /* setjmp probe takes 3 arguments, address of jump buffer
+ first argument (8@x0), return value second argument (-4@x1),
+ and target address (8@x30), respectively. */
+ //LIBC_PROBE (setjmp, 3, 8@x0, -4@x1, 8@x30)
+ stp d8, d9, [x0, #JB_D8<<3]
+ stp d10, d11, [x0, #JB_D10<<3]
+ stp d12, d13, [x0, #JB_D12<<3]
+ stp d14, d15, [x0, #JB_D14<<3]
+ mov x2, sp
+ str x2, [x0, #JB_SP<<3]
+
+ b C_SYMBOL_NAME(__sigjmp_save)
+
+END (__sigsetjmp)
+hidden_def (__sigsetjmp)
diff --git a/libc/sysdeps/linux/aarch64/sys/procfs.h b/libc/sysdeps/linux/aarch64/sys/procfs.h
new file mode 100644
index 000000000..7e408c3f8
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/sys/procfs.h
@@ -0,0 +1,123 @@
+/* Copyright (C) 1996-2016 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_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;
+
+/* And the whole bunch of them. We could have used `struct
+ pt_regs' directly in the typedef, but tradition says that
+ the register set is an array, which does have some peculiar
+ semantics, so leave it that way. */
+#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+/* Register set for the floating-point registers. */
+typedef struct user_fpsimd_struct elf_fpregset_t;
+
+/* 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 int pr_uid;
+ unsigned 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/aarch64/sys/ucontext.h b/libc/sysdeps/linux/aarch64/sys/ucontext.h
new file mode 100644
index 000000000..d17458896
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/sys/ucontext.h
@@ -0,0 +1,53 @@
+/* Copyright (C) 1998-2016 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/>. */
+
+/* System V/AArch64 ABI compliant context switching support. */
+
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H 1
+
+#include <features.h>
+#include <signal.h>
+
+#include <sys/procfs.h>
+
+typedef elf_greg_t greg_t;
+
+/* Container for all general registers. */
+typedef elf_gregset_t gregset_t;
+
+/* 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;
+ __sigset_t uc_sigmask;
+ mcontext_t uc_mcontext;
+ } ucontext_t;
+
+#endif /* sys/ucontext.h */
diff --git a/libc/sysdeps/linux/aarch64/sys/user.h b/libc/sysdeps/linux/aarch64/sys/user.h
new file mode 100644
index 000000000..f6fc361e8
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/sys/user.h
@@ -0,0 +1,37 @@
+/* Copyright (C) 2009-2016 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_USER_H
+#define _SYS_USER_H 1
+
+struct user_regs_struct
+{
+ unsigned long long regs[31];
+ unsigned long long sp;
+ unsigned long long pc;
+ unsigned long long pstate;
+};
+
+struct user_fpsimd_struct
+{
+ __uint128_t vregs[32];
+ unsigned int fpsr;
+ unsigned int fpcr;
+};
+
+#endif
diff --git a/libc/sysdeps/linux/aarch64/syscall.S b/libc/sysdeps/linux/aarch64/syscall.S
new file mode 100644
index 000000000..ac609a337
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/syscall.S
@@ -0,0 +1,42 @@
+/* Copyright (C) 2005-2017 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+
+/* syscall (int nr, ...)
+
+ AArch64 system calls take between 0 and 7 arguments. On entry here nr
+ is in w0 and any other system call arguments are in register x1..x7.
+
+ For kernel entry we need to move the system call nr to x8 then
+ load the remaining arguments to register. */
+
+ENTRY (syscall)
+ uxtw x8, w0
+ mov x0, x1
+ mov x1, x2
+ mov x2, x3
+ mov x3, x4
+ mov x4, x5
+ mov x5, x6
+ mov x6, x7
+ svc 0x0
+ cmn x0, #4095
+ b.cs 1f
+ RET
+1:
+ b SYSCALL_ERROR
+PSEUDO_END (syscall)
diff --git a/libc/sysdeps/linux/aarch64/sysdep.h b/libc/sysdeps/linux/aarch64/sysdep.h
new file mode 100644
index 000000000..82790be6d
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/sysdep.h
@@ -0,0 +1,150 @@
+/* Copyright (C) 2005-2016 Free Software Foundation, Inc.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public License as
+published by the Free Software Foundation; either version 2.1 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with the GNU C Library; if not, see
+<http://www.gnu.org/licenses/>. */
+
+#ifndef _LINUX_AARCH64_SYSDEP_H
+#define _LINUX_AARCH64_SYSDEP_H 1
+
+#include <common/sysdep.h>
+#include <sys/syscall.h>
+
+/* In order to get __set_errno() definition in INLINE_SYSCALL. */
+#ifndef __ASSEMBLER__
+#include <errno.h>
+#endif
+
+/* For Linux we can use the system call table in the header file
+/usr/include/asm/unistd.h
+of the kernel. But these symbols do not follow the SYS_* syntax
+so we have to redefine the `SYS_ify' macro here. */
+#undef SYS_ify
+#define SYS_ify(syscall_name) (__NR_##syscall_name)
+
+#ifdef __ASSEMBLER__
+
+#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
+
+/* Local label name for asm code. */
+#ifndef L
+# define L(name) .L##name
+#endif
+
+/* Define an entry point visible from C. */
+#define ENTRY(name) \
+ .globl C_SYMBOL_NAME(name); \
+ .type C_SYMBOL_NAME(name),%function; \
+ .align 4; \
+ C_LABEL(name) \
+ cfi_startproc;
+
+/* Define an entry point visible from C. */
+#define ENTRY_ALIGN(name, align) \
+ .globl C_SYMBOL_NAME(name); \
+ .type C_SYMBOL_NAME(name),%function; \
+ .p2align align; \
+ C_LABEL(name) \
+ cfi_startproc;
+
+#undef END
+#define END(name) \
+ cfi_endproc; \
+ ASM_SIZE_DIRECTIVE(name)
+
+/* Linux uses a negative return value to indicate syscall errors,
+unlike most Unices, which use the condition codes' carry flag.
+
+Since version 2.1 the return value of a system call might be
+negative even if the call succeeded. E.g., the `lseek' system call
+might return a large offset. Therefore we must not anymore test
+for < 0, but test for a real error by making sure the value in R0
+is a real error number. Linus said he will make sure the no syscall
+returns a value in -1 .. -4095 as a valid result so we can safely
+test with -4095. */
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+.text; \
+ENTRY (name); \
+DO_CALL (syscall_name, args); \
+cmn x0, #4095; \
+b.cs .Lsyscall_error;
+
+# undef PSEUDO_END
+# define PSEUDO_END(name) \
+SYSCALL_ERROR_HANDLER \
+END (name)
+
+# undef PSEUDO_NOERRNO
+# define PSEUDO_NOERRNO(name, syscall_name, args) \
+.text; \
+ENTRY (name); \
+DO_CALL (syscall_name, args);
+
+# undef PSEUDO_END_NOERRNO
+# define PSEUDO_END_NOERRNO(name) \
+END (name)
+
+# define ret_NOERRNO ret
+
+/* The function has to return the error code. */
+# undef PSEUDO_ERRVAL
+# define PSEUDO_ERRVAL(name, syscall_name, args) \
+.text; \
+ENTRY (name) \
+DO_CALL (syscall_name, args); \
+neg x0, x0
+
+# undef PSEUDO_END_ERRVAL
+# define PSEUDO_END_ERRVAL(name) \
+END (name)
+
+# define ret_ERRVAL ret
+
+#if defined _LIBC_REENTRANT
+# if defined USE___THREAD
+# ifndef NOT_IN_libc
+# define SYSCALL_ERROR_ERRNO __libc_errno
+# else
+# define SYSCALL_ERROR_ERRNO errno
+# endif
+# endif
+#endif
+
+#if defined USE___THREAD
+# define SYSCALL_ERROR .Lsyscall_error
+# define SYSCALL_ERROR_HANDLER \
+.Lsyscall_error: \
+ adrp x1, :gottprel:SYSCALL_ERROR_ERRNO; \
+ neg w2, w0; \
+ ldr x1, [x1, :gottprel_lo12:SYSCALL_ERROR_ERRNO]; \
+ mrs x3, tpidr_el0; \
+ mov x0, -1; \
+ str w2, [x1, x3]; \
+ ret;
+#else
+# define SYSCALL_ERROR __syscall_error
+# define SYSCALL_ERROR_HANDLER \
+.Lsyscall_error: \
+ b __syscall_error;
+#endif
+
+# undef DO_CALL
+# define DO_CALL(syscall_name, args) \
+mov x8, SYS_ify (syscall_name); \
+svc 0
+
+#endif /* __ASSEMBLER__ */
+
+#endif /* linux/aarch64/sysdep.h */
diff --git a/libc/sysdeps/linux/aarch64/vfork.S b/libc/sysdeps/linux/aarch64/vfork.S
new file mode 100644
index 000000000..9a8fd469a
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/vfork.S
@@ -0,0 +1,37 @@
+/* Copyright (C) 1999-2017 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+
+/* Clone the calling process, but without copying the whole address space.
+ The calling process is suspended until the new process exits or is
+ replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
+ and the process ID of the new process to the old process. */
+
+ENTRY (vfork)
+
+ mov x0, #0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */
+ mov x1, sp
+ DO_CALL (clone, 2)
+
+ cmn x0, #4095
+ b.cs .Lsyscall_error
+ RET
+
+PSEUDO_END (vfork)
+libc_hidden_def (vfork)