e0d7cb1063
It turns out that it is pretty easy to make CloudABI work on ARM64. We essentially only need to copy over the sysvec from AMD64 and ensure that we use ARM64 specific registers. As there is an overlap between function argument and return registers, we do need to extend cloudabi64_schedtail() to only set its values if we're actually forking. Not when we're creating a new thread. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D3917
106 lines
3.3 KiB
Groff
106 lines
3.3 KiB
Groff
.\" Copyright (c) 2015 Nuxi, https://nuxi.nl/
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.Dd October 22, 2015
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.Dt CLOUDABI 4
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.Os
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.Sh NAME
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.Nm cloudabi ,
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.Nm cloudabi64
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.Nd CloudABI support
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.Sh SYNOPSIS
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Support for 64-bit CloudABI executables can be compiled into the kernel
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by adding this line to the kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "options COMPAT_CLOUDABI64"
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.Ed
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.Pp
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CloudABI support can also be loaded at boot time from
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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cloudabi_load="YES"
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cloudabi64_load="YES"
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.Ed
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.Sh DESCRIPTION
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CloudABI is a POSIX-like pure capability-based runtime environment,
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similar to
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.Xr capsicum 4 .
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It can be used to develop applications that are cross-platform,
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easier to test,
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and hardened against security exploits.
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.Pp
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Support for CloudABI on
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.Fx
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consists of two separate kernel modules.
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The
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.Nm cloudabi
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kernel module implements all of the system calls that do not depend on
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data structures that differ between architectures.
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.Pp
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The
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.Nm cloudabi64
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kernel module provides implementations of all of the machine-dependent
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system calls.
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It assumes that pointers stored in data structures provided as system
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call arguments are 64 bits in size.
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It also provides the image activator that loads and starts 64-bit ELF
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executables.
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.Pp
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Though the
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.Nm cloudabi
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module can be loaded on any architecture supported by
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.Fx ,
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the
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.Nm cloudabi64
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module is only available for amd64 and arm64.
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.Pp
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A full cross compilation toolchain for CloudABI is available in the
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.Pa devel/cloudabi-toolchain
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port.
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.Pp
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The
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.Pa sysutils/cloudabi-utils
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port provides the
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.Xr cloudabi-run 1
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utility.
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.Xr cloudabi-run 1
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can be used to safely execute CloudABI processes with access to a
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restricted set of resources.
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.Sh SEE ALSO
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.Xr cloudabi-run 1 ,
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.Xr capsicum 4 ,
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.Xr linux 4 ,
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.Xr elf 5
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.Pp
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cloudlibc on GitHub:
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.Pa https://github.com/NuxiNL/cloudlibc .
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.Pp
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The CloudABI Ports Collection on GitHub:
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.Pa https://github.com/NuxiNL/cloudabi-ports .
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.Sh HISTORY
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CloudABI support first appeared in
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.Fx 11.0 .
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.Sh AUTHORS
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.An Nuxi : Pa https://nuxi.nl/ .
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