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Diffstat (limited to 'usr.sbin/binmiscctl/binmiscctl.8')
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diff --git a/usr.sbin/binmiscctl/binmiscctl.8 b/usr.sbin/binmiscctl/binmiscctl.8 new file mode 100644 index 0000000..4bc9986 --- /dev/null +++ b/usr.sbin/binmiscctl/binmiscctl.8 @@ -0,0 +1,309 @@ +.\"- +.\" Copyright (c) 2013 Stacey D. Son +.\" 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. +.\" +.\" $FreeBSD$ +.\" +.\" Support for miscellaneous binary image activators +.\" +.Dd December 30, 2014 +.Dt BINMISCCTL 8 +.Os +.Sh NAME +.Nm binmiscctl +.Nd manage binary image activators +.Sh SYNOPSIS +.Nm +.Cm add +.Ar name +.Cm --interpreter +.Ar path +.Cm --magic +.Ar magic +.Cm --size +.Ar size +.Op Cm --mask Ar mask +.Op Cm --offset Ar offset +.Op Cm --set-enabled +.Nm +.Cm remove +.Ar name +.Nm +.Cm disable +.Ar name +.Nm +.Cm enable +.Ar name +.Nm +.Cm lookup +.Ar name +.Nm +.Cm list +.Sh DESCRIPTION +The +.Nm +utility +is the management utility for configuring miscellaneous binaries image +activators in the kernel. +It allows adding, deleting, disabling, +enabling, and looking up interpreters. +Also, all the interpreters can +be listed. +.Pp +The first argument on the command line indicates the operation to be +performed. +Operation must be one of the following: +.Bl -tag -width indent +.It Xo +.Cm add +.Ar name +.Cm --interpreter +.Ar path +.Cm --magic +.Ar magic +.Cm --size +.Ar size +.Op Cm --mask Ar mask +.Op Cm --offset Ar offset +.Op Cm --set-enabled +.Xc +Add a new activator entry in the kernel. +You must specify a +unique +.Ar name, +interpreter path and its arguments +.Ar path, +header +.Ar magic +bytes that uniquely identify a suitable binary for the activator, +and the +.Ar size +of the +.Ar magic +in bytes. +.Pp +Optionally you may specify a +.Ar mask +to do a bitwise AND with the header bytes. +This effectively allows you to ignore fields in the binary header that +do not uniquely indentify the binary file's type. +.Pp +An +.Ar offset +may be specified for the magic bytes using the +.Cm --offset +option. +By default the +.Ar offset +is zero. +.Pp +To enable the activator entry the +.Cm --set-enabled +option is used. +The activator default state is disabled. +.Pp +The interpreter +.Ar path +may also contain arguments for the interpreter including +.Ar #a +which gets replaced by the old +.Dv argv0 +value in the interpreter string. +.It Cm remove Ar name +Remove the activator entry identified with +.Ar name . +.It Cm disable Ar name +Disable the activator entry identified with +.Ar name . +.It Cm enable Ar name +Enable the activator entry identified with +.Ar name . +.It Cm lookup Ar name +Look up and print out the activator entry identified with +.Ar name . +.It Cm list +Take a snapshot and print all the activator entries currently configured. +.El +.Sh EXAMPLES +Add an image activator to run the LLVM interpreter (lli) on bitcode +compiled files: +.Bd -ragged -offset indent +# binmiscctl add llvmbc --interpreter ''/usr/bin/lli --fake-argv0=#a'' +--magic ''BC\\xc0\\xde'' --size 4 --set-enabled +.Ed +.Pp +.Ar #a +is replaced with the old +.Dv argv0 +value so that 'lli' can fake its +.Dv argv0 . +Set its state to enabled. +.Pp +Set the state of the +.Ar llvmbc +image activator to disabled: +.Dl # binmiscctl disable llvmbc +.Pp +Set the state of the +.Ar llvmbc +image activator to enabled: +.Dl # binmiscctl enable llvmbc +.Pp +Delete the +.Ar llvmbc +image activator: +.Dl # binmiscctl remove llvmbc +.Pp +Look up and list the record for the +.Ar llvmbc +image activator: +.Dl # binmiscctl lookup llvmbc +.Pp +Add QEMU bsd-user program as an image activator for ARM AARCH64 binaries: +.Bd -literal -offset indent +# binmiscctl add arm64 \e + --interpreter "/usr/local/bin/qemu-aarch64-static" \e + --magic "\ex7f\ex45\ex4c\ex46\ex02\ex01\ex01\ex00\ex00\ex00\e + \ex00\ex00\ex00\ex00\ex00\ex00\ex02\ex00\exb7\ex00" \e + --mask "\exff\exff\exff\exff\exff\exff\exff\ex00\exff\exff\e + \exff\exff\exff\exff\exff\exff\exfe\exff\exff\exff" \e + --size 20 --set-enabled +.Ed +.Pp +Add QEMU bsd-user program as an image activator for ARM little-endian binaries: +.Bd -literal -offset indent +# binmiscctl add armelf \e + --interpreter "/usr/local/bin/qemu-arm-static" \e + --magic "\ex7f\ex45\ex4c\ex46\ex01\ex01\ex01\ex00\ex00\ex00\e + \ex00\ex00\ex00\ex00\ex00\ex00\ex02\ex00\ex28\ex00" \e + --mask "\exff\exff\exff\exff\exff\exff\exff\ex00\exff\exff\e + \exff\exff\exff\exff\exff\exff\exfe\exff\exff\exff" \e + --size 20 --set-enabled +.Ed +.Pp +Add QEMU bsd-user program as an image activator for ARM big-endian binaries: +.Bd -literal -offset indent +# binmiscctl add armebelf \e + --interpreter "/usr/local/bin/qemu-arm-static" \e + --magic "\ex7f\ex45\ex4c\ex46\ex01\ex02\ex01\ex00\ex00\ex00\e + \ex00\ex00\ex00\ex00\ex00\ex00\ex00\ex02\ex00\ex28" \e + --mask "\exff\exff\exff\exff\exff\exff\exff\ex00\exff\exff\e + \exff\exff\exff\exff\exff\exff\exff\exfe\exff\exff" \e + --size 20 --set-enabled +.Ed +.Pp +Add QEMU bsd-user program as an image activator for MIPS32 binaries: +.Bd -literal -offset indent +# binmiscctl add mips32 \e + --interpreter "/usr/local/bin/qemu-mips-static" \e + --magic "\ex7f\ex45\ex4c\ex46\ex01\ex02\ex01\ex00\ex00\ex00\e + \ex00\ex00\ex00\ex00\ex00\ex00\ex00\ex02\ex00\ex08" \e + --mask "\exff\exff\exff\exff\exff\exff\exff\ex00\exff\exff\e + \exff\exff\exff\exff\exff\exff\exff\exfe\exff\exff" \e + --size 20 --set-enabled +.Ed +.Pp +Add QEMU bsd-user program as an image activator for MIPS64 binaries: +.Bd -literal -offset indent +# binmiscctl add mips64 \e + --interpreter "/usr/local/bin/qemu-mips64-static" \e + --magic "\ex7f\ex45\ex4c\ex46\ex02\ex02\ex01\ex00\ex00\ex00\e + \ex00\ex00\ex00\ex00\ex00\ex00\ex00\ex02\ex00\ex08" \e + --mask "\exff\exff\exff\exff\exff\exff\exff\ex00\exff\exff\e + \exff\exff\exff\exff\exff\exff\exff\exfe\exff\exff" \e + --size 20 --set-enabled +.Ed +.Pp +Add QEMU bsd-user program as an image activator for PowerPC binaries: +.Bd -literal -offset indent +# binmiscctl add powerpc \e + --interpreter "/usr/local/bin/qemu-ppc-static" \e + --magic "\ex7f\ex45\ex4c\ex46\ex01\ex02\ex01\ex00\ex00\ex00\e + \ex00\ex00\ex00\ex00\ex00\ex00\ex00\ex02\ex00\ex14" \e + --mask "\exff\exff\exff\exff\exff\exff\exff\ex00\exff\exff\e + \exff\exff\exff\exff\exff\exff\exff\exfe\exff\exff" \e + --size 20 --set-enabled +.Ed +.Pp +Add QEMU bsd-user program as an image activator for PowerPC64 binaries: +.Bd -literal -offset indent +# binmiscctl add powerpc64 \e + --interpreter "/usr/local/bin/qemu-ppc64-static" \e + --magic "\ex7f\ex45\ex4c\ex46\ex01\ex02\ex01\ex00\ex00\ex00\e + \ex00\ex00\ex00\ex00\ex00\ex00\ex00\ex02\ex00\ex15" \e + --mask "\exff\exff\exff\exff\exff\exff\exff\ex00\exff\exff\e + \exff\exff\exff\exff\exff\exff\exff\exfe\exff\exff" \e + --size 20 --set-enabled +.Ed +.Pp +Add QEMU bsd-user program as an image activator for SPARC64 binaries: +.Bd -literal -offset indent +# binmiscctl add sparc64 \e + --interpreter "/usr/local/bin/qemu-sparc64-static" \e + --magic "\ex7f\ex45\ex4c\ex46\ex02\ex02\ex01\ex00\ex00\ex00\e + \ex00\ex00\ex00\ex00\ex00\ex00\ex00\ex02\ex00\ex2b" \e + --mask "\exff\exff\exff\exff\exff\exff\exff\ex00\exff\exff\e + \exff\exff\exff\exff\exff\exff\exff\exfe\exff\exff" \e + --size 20 --set-enabled +.Ed +.Pp +.Ss "Create and use an ARMv6 chroot on an AMD64 host" +Use an existing source tree to build a chroot host with architecture +overrides: +.Bd -literal +D=/path/to/chroot +cd /usr/src +mkdir -p $D +make world TARGET=arm TARGET_ARCH=armv6 DESTDIR=$D +make distribution TARGET=arm TARGET_ARCH=armv6 DESTDIR=$D +.Ed +.Pp +With +.Pa emulators/qemu-user-static +from the +.Fx +Ports Collection, the emulator must be copied into the jail path +specified in the binmiscctl command. +Using the example above: +.Bd -literal +mkdir $D/usr/local/bin +cp /usr/local/bin/qemu-arm-static $D/usr/local/bin +.Ed +.Pp +Now the user can chroot into the environment normally, as root: +.Bd -literal +chroot $D +.Ed +.Sh SEE ALSO +.Xr lli 1 , +.Xr execve 2 , +.Xr jail 8 +.Sh HISTORY +The +.Cm binmiscctl +command was added in +.Fx 10.1 . +It was developed to support the imgact_binmisc kernel module. +.Sh AUTHORS +Stacey D Son |
