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Index: sys/arm64/linux/linux_locore.s
===================================================================
--- /dev/null
+++ sys/arm64/linux/linux_locore.s
@@ -0,0 +1,58 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (C) 2018 Turing Robotic Industries Inc.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * arm64 Linux VDSO implementation.
+ */
+
+#include <machine/asm.h>
+
+ .data
+
+ .globl linux_platform
+linux_platform:
+ .asciz "arm64"
+
+ .text
+
+ENTRY(__kernel_rt_sigreturn)
+ brk #0 /* LINUXTODO: implement __kernel_rt_sigreturn */
+ ret
+
+ENTRY(__kernel_gettimeofday)
+ brk #0 /* LINUXTODO: implement __kernel_gettimeofday */
+ ret
+
+ENTRY(__kernel_clock_gettime)
+ brk #0 /* LINUXTODO: implement __kernel_clock_gettime */
+ ret
+
+ENTRY(__kernel_clock_getres)
+ brk #0 /* LINUXTODO: implement __kernel_clock_getres */
+ ret
Index: sys/arm64/linux/linux_machdep.c
===================================================================
--- /dev/null
+++ sys/arm64/linux/linux_machdep.c
@@ -0,0 +1,132 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2018 Turing Robotic Industries Inc.
+ * Copyright (c) 2000 Marcel Moolenaar
+ *
+ * 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/fcntl.h>
+#include <sys/imgact.h>
+#include <sys/ktr.h>
+#include <sys/proc.h>
+#include <sys/sdt.h>
+
+#include <arm64/linux/linux.h>
+#include <arm64/linux/linux_proto.h>
+#include <compat/linux/linux_dtrace.h>
+#include <compat/linux/linux_emul.h>
+#include <compat/linux/linux_misc.h>
+#include <compat/linux/linux_mmap.h>
+#include <compat/linux/linux_util.h>
+
+/* DTrace init */
+LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
+
+/* DTrace probes */
+LIN_SDT_PROBE_DEFINE0(machdep, linux_set_upcall_kse, todo);
+LIN_SDT_PROBE_DEFINE0(machdep, linux_mmap2, todo);
+LIN_SDT_PROBE_DEFINE0(machdep, linux_rt_sigsuspend, todo);
+LIN_SDT_PROBE_DEFINE0(machdep, linux_sigaltstack, todo);
+LIN_SDT_PROBE_DEFINE0(machdep, linux_set_cloned_tls, todo);
+
+/*
+ * LINUXTODO: deduplicate; linux_execve is common across archs, except that on amd64 compat
+ * linuxulator it calls freebsd32_exec_copyin_args.
+ */
+int
+linux_execve(struct thread *td, struct linux_execve_args *uap)
+{
+ struct image_args eargs;
+ char *path;
+ int error;
+
+ LCONVPATHEXIST(td, uap->path, &path);
+
+ error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, uap->argp,
+ uap->envp);
+ free(path, M_TEMP);
+ if (error == 0)
+ error = linux_common_execve(td, &eargs);
+ return (error);
+}
+
+/* LINUXTODO: implement (or deduplicate) arm64 linux_set_upcall_kse */
+int
+linux_set_upcall_kse(struct thread *td, register_t stack)
+{
+
+ LIN_SDT_PROBE0(machdep, linux_set_upcall_kse, todo);
+ return (EDOOFUS);
+}
+
+/* LINUXTODO: deduplicate arm64 linux_mmap2 */
+int
+linux_mmap2(struct thread *td, struct linux_mmap2_args *uap)
+{
+
+ LIN_SDT_PROBE0(machdep, linux_mmap2, todo);
+ return (linux_mmap_common(td, PTROUT(uap->addr), uap->len, uap->prot,
+ uap->flags, uap->fd, uap->pgoff));
+}
+
+int
+linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
+{
+
+ return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len,
+ uap->prot));
+}
+
+/* LINUXTODO: implement arm64 linux_rt_sigsuspend */
+int
+linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap)
+{
+
+ LIN_SDT_PROBE0(machdep, linux_rt_sigsuspend, todo);
+ return (EDOOFUS);
+}
+
+/* LINUXTODO: implement arm64 linux_sigaltstack */
+int
+linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
+{
+
+ LIN_SDT_PROBE0(machdep, linux_sigaltstack, todo);
+ return (EDOOFUS);
+}
+
+/* LINUXTODO: implement arm64 linux_set_cloned_tls */
+int
+linux_set_cloned_tls(struct thread *td, void *desc)
+{
+
+ LIN_SDT_PROBE0(machdep, linux_set_cloned_tls, todo);
+ return (EDOOFUS);
+}
Index: sys/arm64/linux/linux_ptrace.c
===================================================================
--- /dev/null
+++ sys/arm64/linux/linux_ptrace.c
@@ -0,0 +1,56 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (C) 2018 Turing Robotic Industries Inc.
+ *
+ * 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/sdt.h>
+#include <sys/proc.h>
+#include <sys/ptrace.h>
+
+#include <arm64/linux/linux.h>
+#include <arm64/linux/linux_proto.h>
+#include <compat/linux/linux_dtrace.h>
+
+/* DTrace init */
+LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
+
+/* DTrace probes */
+LIN_SDT_PROBE_DEFINE0(ptrace, linux_ptrace, todo);
+
+int
+linux_ptrace(struct thread *td, struct linux_ptrace_args *uap)
+{
+
+ /* LINUXTODO: implement arm64 linux_ptrace */
+ LIN_SDT_PROBE0(ptrace, linux_ptrace, todo);
+ return (EDOOFUS);
+}
Index: sys/arm64/linux/linux_support.s
===================================================================
--- /dev/null
+++ sys/arm64/linux/linux_support.s
@@ -0,0 +1,57 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (C) 2018 Turing Robotic Industries Inc.
+ *
+ * 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 "linux_assym.h"
+#include <machine/asm.h>
+
+#include "assym.inc"
+
+/*
+ * LINUXTODO: implement futex_*
+ */
+
+ENTRY(futex_xchgl)
+ brk #0
+ ret
+
+ENTRY(futex_addl)
+ brk #0
+ ret
+
+ENTRY(futex_orl)
+ brk #0
+ ret
+
+ENTRY(futex_andl)
+ brk #0
+ ret
+
+ENTRY(futex_xorl)
+ brk #0
+ ret

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