Add the start of libc and libstand for arm64. Not all of the machine

dependent functions have been implemented, but this is enough for world.

Differential Revision:	https://reviews.freebsd.org/D2132
Reviewed by:	emaste
Sponsored by:	The FreeBSD Foundation

lib/libc/Makefile

@@ -79,7 +79,8 @@ NOASM=
 .include "${LIBC_SRCTOP}/net/Makefile.inc"
 .include "${LIBC_SRCTOP}/nls/Makefile.inc"
 .include "${LIBC_SRCTOP}/posix1e/Makefile.inc"
-.if ${LIBC_ARCH} != "amd64" && \
+.if ${LIBC_ARCH} != "aarch64" && \
+    ${LIBC_ARCH} != "amd64" && \
     ${LIBC_ARCH} != "powerpc64" && \
     ${LIBC_ARCH} != "sparc64" && \
     ${MACHINE_ARCH:Mmipsn32*} == "" && \

lib/libc/aarch64/Makefile.inc

@@ -3,3 +3,7 @@
 # Machine dependent definitions for the arm 64-bit architecture.
 #
 
+# Long double is quad precision
+GDTOASRCS+=strtorQ.c
+MDSRCS+=machdep_ldisQ.c
+SYM_MAPS+=${LIBC_SRCTOP}/aarch64/Symbol.map

lib/libc/aarch64/SYS.h

@@ -0,0 +1,63 @@
+/*-
+ * Copyright (c) 2014 Andrew Turner
+ * Copyright (c) 2015 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/syscall.h>
+#include <machine/asm.h>
+
+#define	_SYSCALL(name)						\
+	mov	x8, SYS_ ## name;				\
+	svc	0
+
+#define	SYSCALL(name)						\
+ENTRY(__sys_##name);						\
+	WEAK_REFERENCE(__sys_##name, name);			\
+	WEAK_REFERENCE(__sys_##name, _##name);			\
+	_SYSCALL(name);						\
+	ret;							\
+END(__sys_##name)
+
+#define	PSEUDO(name)						\
+ENTRY(__sys_##name);						\
+	WEAK_REFERENCE(__sys_##name, _##name);			\
+	_SYSCALL(name);						\
+	b.cs	cerror;						\
+	ret;							\
+END(__sys_##name)
+
+#define	RSYSCALL(name)						\
+ENTRY(__sys_##name);						\
+	WEAK_REFERENCE(__sys_##name, name);			\
+	WEAK_REFERENCE(__sys_##name, _##name);			\
+	_SYSCALL(name);						\
+	b.cs	cerror;						\
+	ret;							\
+END(__sys_##name)

lib/libc/aarch64/Symbol.map

@@ -0,0 +1,29 @@
+/*
+ * $FreeBSD$
+ */
+
+/*
+ * This only needs to contain symbols that are not listed in
+ * symbol maps from other parts of libc (i.e., not found in
+ * stdlib/Symbol.map, string/Symbol.map, sys/Symbol.map, ...).
+ */
+FBSD_1.0 {
+	/* PSEUDO syscalls */
+	_exit;
+
+	_setjmp;
+	_longjmp;
+	setjmp;
+	longjmp;
+	sigsetjmp;
+	siglongjmp;
+	vfork;
+	brk;
+	sbrk;
+};
+
+FBSDprivate_1.0 {
+	_set_tp;
+	curbrk;
+	minbrk;
+};

lib/libc/aarch64/_fpmath.h

@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ * Copyright (2) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+		unsigned long	manl	:64;
+		unsigned long	manh	:48;
+		unsigned int	exp	:15;
+		unsigned int	sign	:1;
+	} bits;
+	/* TODO andrew: Check the packing here */
+	struct {
+		unsigned long	manl	:64;
+		unsigned long	manh	:48;
+		unsigned int	expsign	:16;
+	} xbits;
+};
+
+#define	LDBL_NBIT	0
+#define	LDBL_IMPLICIT_NBIT
+#define	mask_nbit_l(u)	((void)0)
+
+#define	LDBL_MANH_SIZE	48
+#define	LDBL_MANL_SIZE	64
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)((u).bits.manl >> 32);	\
+	(a)[2] = (uint32_t)(u).bits.manh;		\
+	(a)[3] = (uint32_t)((u).bits.manh >> 32);	\
+} while(0)

lib/libc/aarch64/arith.h

@@ -0,0 +1,19 @@
+/*
+ * MD header for contrib/gdtoa
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * NOTE: The definitions in this file must be correct or strtod(3) and
+ * floating point formats in printf(3) will break!  The file can be
+ * generated by running contrib/gdtoa/arithchk.c on the target
+ * architecture.  See contrib/gdtoa/gdtoaimp.h for details.
+ */
+
+#define IEEE_8087
+#define Arith_Kind_ASL 1
+#define Long int
+#define Intcast (int)(long)
+#define Double_Align
+#define X64_bit_pointers

lib/libc/aarch64/gd_qnan.h

@@ -0,0 +1,21 @@
+/*
+ * MD header for contrib/gdtoa
+ *
+ * This file can be generated by compiling and running contrib/gdtoa/qnan.c
+ * on the target architecture after arith.h has been generated.
+ *
+ * $FreeBSD$
+ */
+
+#define f_QNAN 0x7fc00000
+#define d_QNAN0 0x0
+#define d_QNAN1 0x7ff80000
+#define ld_QNAN0 0x0
+#define ld_QNAN1 0x0
+#define ld_QNAN2 0x0
+#define ld_QNAN3 0x7fff8000
+#define ldus_QNAN0 0x0
+#define ldus_QNAN1 0x0
+#define ldus_QNAN2 0x0
+#define ldus_QNAN3 0x0
+#define ldus_QNAN4 0x0

lib/libc/aarch64/gen/Makefile.inc

@@ -0,0 +1,9 @@
+# $FreeBSD$
+
+SRCS+=	flt_rounds.c \
+	ldexp.c \
+	_setjmp.S \
+	_set_tp.c \
+	setjmp.S \
+	sigsetjmp.S \
+	trivial-getcontextx.c

lib/libc/aarch64/gen/_set_tp.c

@@ -0,0 +1,42 @@
+/*-
+ * Copyright (c) 2014 Andrew Turner
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <string.h>
+#include <sys/types.h>
+
+#include <machine/sysarch.h>
+
+#include <stdlib.h>
+
+void
+_set_tp(void *tp)
+{
+
+	asm volatile("msr	tpidr_el0, %0" : : "r"(tp));
+}

lib/libc/aarch64/gen/_setjmp.S

@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 2014 Andrew Turner
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Andrew Turner
+ * under sponsorship from the FreeBSD Foundation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include <machine/setjmp.h>
+
+ENTRY(_setjmp)
+	/* Store the magic value and stack pointer */
+	ldr	x8, .Lmagic
+	mov	x9, sp
+	stp	x8, x9, [x0], #16
+
+	/* Store the general purpose registers and lr */
+	stp	x19, x20, [x0], #16
+	stp	x21, x22, [x0], #16
+	stp	x23, x24, [x0], #16
+	stp	x25, x26, [x0], #16
+	stp	x27, x28, [x0], #16
+	stp	x29, lr, [x0], #16
+
+#ifndef _STANDALONE
+	/* Store the vfp registers */
+	stp	d8, d9, [x0], #16
+	stp	d10, d11, [x0], #16
+	stp	d12, d13, [x0], #16
+	stp	d14, d15, [x0]
+#endif
+
+	/* Return value */
+	mov	x0, #0
+	ret
+.Lmagic:
+	.align	3
+	.quad	_JB_MAGIC__SETJMP
+END(_setjmp)
+
+ENTRY(_longjmp)
+	/* Check the magic value */
+	ldr	x8, [x0], #8
+	ldr	x9, .Lmagic
+	cmp	x8, x9
+	b.ne	botch
+
+	/* Restore the stack pointer */
+	ldr	x8, [x0], #8
+	mov	sp, x8
+
+	/* Restore the general purpose registers and lr */
+	ldp	x19, x20, [x0], #16
+	ldp	x21, x22, [x0], #16
+	ldp	x23, x24, [x0], #16
+	ldp	x25, x26, [x0], #16
+	ldp	x27, x28, [x0], #16
+	ldp	x29, lr, [x0], #16
+
+#ifndef _STANDALONE
+	/* Restore the vfp registers */
+	ldp	d8, d9, [x0], #16
+	ldp	d10, d11, [x0], #16
+	ldp	d12, d13, [x0], #16
+	ldp	d14, d15, [x0]
+#endif
+
+	/* Load the return value */
+	mov	x0, x1
+	ret
+
+botch:
+#ifdef _STANDALONE
+	b	botch
+#else
+	bl	_C_LABEL(longjmperror)
+	bl	_C_LABEL(abort)
+#endif
+END(_longjmp)

lib/libc/aarch64/gen/flt_rounds.c

@@ -0,0 +1,49 @@
+/*-
+ * Copyright (c) 2012 Ian Lepore <freebsd@damnhippie.dyndns.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <fenv.h>
+#include <float.h>
+
+static int map[] = {
+	1,	/* round to nearest */
+	2,	/* round to positive infinity */
+	3,	/* round to negative infinity */
+	0	/* round to zero */
+};
+
+int
+__flt_rounds(void)
+{
+	uint64_t fpcr;
+
+	asm volatile("mrs	%0, fpcr" : "=r" (fpcr));
+	return map[(fpcr >> 22) & 3];
+}

lib/libc/aarch64/gen/setjmp.S

@@ -0,0 +1,123 @@
+/*-
+ * Copyright (c) 2014 Andrew Turner
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Andrew Turner
+ * under sponsorship from the FreeBSD Foundation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include <machine/setjmp.h>
+
+ENTRY(setjmp)
+	sub	sp, sp, #16
+	stp	x0, lr, [sp]
+
+	/* Store the signal mask */
+	add	x2, x0, #(_JB_SIGMASK * 8)	/* oset */
+	mov	x1, #0				/* set */
+	mov	x0, #1				/* SIG_BLOCK */
+	bl	sigprocmask
+
+	ldp	x0, lr, [sp]
+	add	sp, sp, #16
+
+	/* Store the magic value and stack pointer */
+	ldr	x8, .Lmagic
+	mov	x9, sp
+	stp	x8, x9, [x0], #16
+
+	/* Store the general purpose registers and lr */
+	stp	x19, x20, [x0], #16
+	stp	x21, x22, [x0], #16
+	stp	x23, x24, [x0], #16
+	stp	x25, x26, [x0], #16
+	stp	x27, x28, [x0], #16
+	stp	x29, lr, [x0], #16
+
+	/* Store the vfp registers */
+	stp	d8, d9, [x0], #16
+	stp	d10, d11, [x0], #16
+	stp	d12, d13, [x0], #16
+	stp	d14, d15, [x0]
+
+	/* Return value */
+	mov	x0, #0
+	ret
+.Lmagic:
+	.align	3
+	.quad	_JB_MAGIC_SETJMP
+END(setjmp)
+
+ENTRY(longjmp)
+	sub	sp, sp, #32
+	stp	x0, lr, [sp]
+	str	x1, [sp, #16]
+
+	/* Restore the signal mask */
+	mov	x1, #0				/* oset */
+	add	x1, x0, #(_JB_SIGMASK * 8)	/* set */
+	mov	x0, #3				/* SIG_BLOCK */
+	bl	sigprocmask
+
+	ldr	x1, [sp, #16]
+	ldp	x0, lr, [sp]
+	add	sp, sp, #32
+
+	/* Check the magic value */
+	ldr	x8, [x0], #8
+	ldr	x9, .Lmagic
+	cmp	x8, x9
+	b.ne	botch
+
+	/* Restore the stack pointer */
+	ldr	x8, [x0], #8
+	mov	sp, x8
+
+	/* Restore the general purpose registers and lr */
+	ldp	x19, x20, [x0], #16
+	ldp	x21, x22, [x0], #16
+	ldp	x23, x24, [x0], #16
+	ldp	x25, x26, [x0], #16
+	ldp	x27, x28, [x0], #16
+	ldp	x29, lr, [x0], #16
+
+	/* Restore the vfp registers */
+	ldp	d8, d9, [x0], #16
+	ldp	d10, d11, [x0], #16
+	ldp	d12, d13, [x0], #16
+	ldp	d14, d15, [x0]
+
+	/* Load the return value */
+	mov	x0, x1
+	ret
+
+botch:
+	bl	_C_LABEL(longjmperror)
+	bl	_C_LABEL(abort)
+END(longjmp)

lib/libc/aarch64/gen/sigsetjmp.S

@@ -0,0 +1,53 @@
+/*-
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include <machine/setjmp.h>
+
+ENTRY(sigsetjmp)
+	cmp	x1, #0
+	b.eq	_C_LABEL(_setjmp)
+	b	_C_LABEL(setjmp)
+END(sigsetjmp)
+
+ENTRY(siglongjmp)
+	/* Load the _setjmp magic */
+	ldr	x2, .Lmagic
+	ldr	x3, [x0]
+
+	/* Check the magic */
+	cmp	x2, x3
+	b.eq	_C_LABEL(_longjmp)
+	b	_C_LABEL(longjmp)
+.Lmagic:
+	.align	3
+	.quad	_JB_MAGIC__SETJMP
+END(siglongjmp)

lib/libc/aarch64/sys/Makefile.inc

@@ -0,0 +1,25 @@
+# $FreeBSD$
+
+SRCS+=	trivial-vdso_tc.c
+
+#MDASM= ptrace.S
+MDASM=	brk.S \
+	cerror.S \
+	pipe.S \
+	sbrk.S \
+	shmat.S \
+	sigreturn.S \
+	syscall.S \
+	vfork.S
+
+# Don't generate default code for these syscalls:
+NOASM=	break.o \
+	exit.o \
+	getlogin.o \
+	openbsd_poll.o \
+	sstk.o \
+	vfork.o \
+	yield.o
+
+PSEUDO= _exit.o \
+	_getlogin.o

lib/libc/aarch64/sys/brk.S

@@ -0,0 +1,93 @@
+/*-
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include "SYS.h"
+
+	.data
+	.align	3
+	.globl	_C_LABEL(minbrk)
+	.type	_C_LABEL(minbrk),#object
+_C_LABEL(minbrk):
+	.quad	_C_LABEL(_end)
+
+	.text
+/*
+ * int brk(const void *addr);
+ */
+ENTRY(_brk)
+	WEAK_REFERENCE(_brk, brk)
+
+	/* Load the address of minbrk */
+#ifdef __PIC__
+	adrp	x2, :got:minbrk
+	ldr	x3, [x2, #:got_lo12:minbrk]
+#else
+	ldr	x3, .Lminbrk
+#endif
+
+	/* Get the minimum allowable brk address */
+	ldr	x2, [x3]
+
+	/* Validate the address */
+	cmp	x0, x2
+	b.ge	1f
+	/* Invalid, set it to the minimum */
+	mov	x0, x2
+
+	/* Backup the new address */
+1:	mov	x4, x0
+
+	/* Update for this value, will overwrite x0 and x1 */
+	_SYSCALL(break)
+	b.cs	cerror
+
+#ifdef __PIC__
+	adrp	x2, :got:curbrk
+	ldr	x3, [x2, #:got_lo12:curbrk]
+#else
+	ldr	x3, .Lcurbrk
+#endif
+
+	/* Store the new curbrk value */
+	str	x4, [x3]
+
+	/* Return success */
+	mov	x0, #0
+	ret
+
+#ifndef __PIC__
+.Lcurbrk:
+	.quad	_C_LABEL(curbrk)
+.Lminbrk:
+	.quad	_C_LABEL(minbrk)
+#endif
+END(_brk)

lib/libc/aarch64/sys/cerror.S

@@ -0,0 +1,41 @@
+/*-
+ * Copyright (c) 2014 Andrew Turner
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+ENTRY(cerror)
+	sub	sp, sp, #16
+	stp	x0, lr, [sp]
+	bl	_C_LABEL(__error)
+	ldp	x1, lr, [sp]
+	str	x1, [x0]
+	movn	x0, #0
+	movn	x1, #0
+	add	sp, sp, #16
+	ret
+END(cerror)

lib/libc/aarch64/sys/pipe.S

@@ -0,0 +1,52 @@
+/*-
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include "SYS.h"
+
+ENTRY(__sys_pipe)
+	WEAK_REFERENCE(__sys_pipe, pipe)
+
+	/* Backup the pointer passed to us */
+	mov	x2, x0
+
+	/* Make the syscall */
+	_SYSCALL(pipe)
+	b.cs	cerror
+
+	/* Store the result */
+	str	w0, [x2, #0]
+	str	w1, [x2, #4]
+
+	/* Return */
+	mov	x0, #0
+	ret
+END(__sys_pipe)

lib/libc/aarch64/sys/sbrk.S

@@ -0,0 +1,79 @@
+/*-
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include "SYS.h"
+
+	.data
+	.align	3
+	.global	_C_LABEL(curbrk)
+	.type	_C_LABEL(curbrk),#object
+_C_LABEL(curbrk):
+	.quad	_C_LABEL(_end)
+
+	.text
+/*
+ * void *sbrk(intptr_t incr);
+ */
+ENTRY(_sbrk)
+	WEAK_REFERENCE(_sbrk, sbrk)
+
+	/* Load the address of curbrk */
+#ifdef __PIC__
+	adrp	x2, :got:curbrk
+	ldr	x3, [x2, #:got_lo12:curbrk]
+#else
+	ldr	x3, .Lcurbrk
+#endif
+
+	/* Get the current brk address */
+	ldr	x2, [x3]
+
+	/* Calculate the new value */
+	add	x0, x2, x0
+	mov	x4, x0
+
+	/* Update for this value, will overwrite x0 and x1 */
+	_SYSCALL(break)
+	b.cs	cerror
+
+	/* Load the old value to return */
+	ldr	x0, [x3]
+
+	/* Store the new curbrk value */
+	str	x4, [x3]
+
+	ret
+#ifndef __PIC__
+.Lcurbrk:
+	.quad	_C_LABEL(curbrk)
+#endif
+END(_sbrk)

lib/libc/aarch64/sys/shmat.S

@@ -0,0 +1,35 @@
+/*-
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include "SYS.h"
+
+RSYSCALL(shmat)

lib/libc/aarch64/sys/sigreturn.S

@@ -0,0 +1,35 @@
+/*-
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include "SYS.h"
+
+RSYSCALL(sigreturn)

lib/libc/aarch64/sys/syscall.S

@@ -0,0 +1,35 @@
+/*-
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include "SYS.h"
+
+RSYSCALL(syscall)

lib/libc/aarch64/sys/vfork.S

@@ -0,0 +1,42 @@
+/*-
+ * Copyright (c) 2014 Andrew Turner
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+#include "SYS.h"
+
+ENTRY(__sys_vfork)
+	WEAK_REFERENCE(__sys_vfork, vfork)
+	WEAK_REFERENCE(__sys_vfork, _vfork)
+	mov	x2, lr
+	_SYSCALL(vfork)
+	b.cs	cerror
+	sub	x1, x1, #1
+	and	x0, x0, x1
+	mov	lr, x2
+	ret
+END(__sys_vfork)

lib/libc/gen/tls.c

@@ -65,13 +65,14 @@ void __libc_free_tls(void *tls, size_t tcbsize, size_t tcbalign);
 #if defined(__amd64__)
 #define TLS_TCB_ALIGN 16
 #elif defined(__powerpc__) || defined(__i386__) || defined(__arm__) || \
-    defined(__sparc64__) || defined(__mips__)
+    defined(__sparc64__) || defined(__mips__) || defined(__aarch64__)
 #define TLS_TCB_ALIGN sizeof(void *)
 #else
 #error TLS_TCB_ALIGN undefined for target architecture
 #endif
 
-#if defined(__arm__) || defined(__mips__) || defined(__powerpc__)
+#if defined(__arm__) || defined(__mips__) || defined(__powerpc__) || \
+    defined(__aarch64__)
 #define TLS_VARIANT_I
 #endif
 #if defined(__i386__) || defined(__amd64__) || defined(__sparc64__)

lib/libc/xdr/xdr_float.c

@@ -64,7 +64,8 @@ __FBSDID("$FreeBSD$");
 #if defined(__m68k__) || defined(__sparc__) || defined(__i386__) || \
     defined(__mips__) || defined(__ns32k__) || defined(__alpha__) || \
     defined(__arm__) || defined(__ppc__) || \
-    defined(__arm26__) || defined(__sparc64__) || defined(__amd64__)
+    defined(__arm26__) || defined(__sparc64__) || defined(__amd64__) || \
+    defined(__aarch64__)
 #include <machine/endian.h>
 #define IEEEFP
 #endif

lib/libstand/Makefile

@@ -39,6 +39,9 @@ CFLAGS+=	-msoft-float -D_STANDALONE -DNETIF_DEBUG
 .if ${MACHINE_CPUARCH} == "arm"
 CFLAGS+=	-msoft-float -D_STANDALONE
 .endif
+.if ${MACHINE_CPUARCH} == "aarch64"
+CFLAGS+=	-D_STANDALONE -mgeneral-regs-only
+.endif
 .if ${MACHINE_CPUARCH} == "mips"
 CFLAGS+=	-G0 -fno-pic -mno-abicalls
 .endif
@@ -75,8 +78,12 @@ SRCS+=	udivmoddi4.c udivmodsi4.c udivdi3.c udivsi3.c umoddi3.c umodsi3.c
 .PATH: ${.CURDIR}/../../contrib/compiler-rt/lib/builtins/arm/
 SRCS+=	aeabi_idivmod.S aeabi_ldivmod.S aeabi_uidivmod.S aeabi_uldivmod.S
 SRCS+=	aeabi_memcmp.S aeabi_memcpy.S aeabi_memmove.S aeabi_memset.S
-
 .endif
+
+.if ${MACHINE_CPUARCH} == "aarch64"
+.PATH: ${.CURDIR}/../libc/aarch64/gen
+.endif
+
 .if ${MACHINE_CPUARCH} == "powerpc"
 .PATH: ${.CURDIR}/../libc/quad
 SRCS+=	ashldi3.c ashrdi3.c

share/mk/src.opts.mk

@@ -235,6 +235,8 @@ __DEFAULT_NO_OPTIONS+=CLANG CLANG_BOOTSTRAP CLANG_FULL CLANG_IS_CC
 .endif
 .if ${__T} == "aarch64"
 BROKEN_OPTIONS+=BINUTILS BINUTILS_BOOTSTRAP GDB
+# There was no support for arm64 prior to FreeBSD 11
+BROKEN_OPTIONS+=SYSCALL_COMPAT
 .endif
 
 .include <bsd.mkopt.mk>