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author | Mateusz Piotrowski <0mp@FreeBSD.org> | 2018-07-20 22:50:21 +0000 |
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committer | Mateusz Piotrowski <0mp@FreeBSD.org> | 2018-07-20 22:50:21 +0000 |
commit | caba8c7d3f5f13ac668231ec83e95b8bc8106088 (patch) | |
tree | cc39c4ce5770554f10738f2339f60f4af0d21b08 /usr.sbin | |
parent | e87880970d7460ee45f2d164b5cdfd3bbf836ac8 (diff) | |
download | src-test-caba8c7d3f5f13ac668231ec83e95b8bc8106088.tar.gz src-test-caba8c7d3f5f13ac668231ec83e95b8bc8106088.zip |
Notes
Diffstat (limited to 'usr.sbin')
-rw-r--r-- | usr.sbin/binmiscctl/binmiscctl.8 | 114 |
1 files changed, 65 insertions, 49 deletions
diff --git a/usr.sbin/binmiscctl/binmiscctl.8 b/usr.sbin/binmiscctl/binmiscctl.8 index 25a3999f503da..5b543148ea0fb 100644 --- a/usr.sbin/binmiscctl/binmiscctl.8 +++ b/usr.sbin/binmiscctl/binmiscctl.8 @@ -27,7 +27,7 @@ .\" .\" Support for miscellaneous binary image activators .\" -.Dd December 30, 2014 +.Dd July 21, 2018 .Dt BINMISCCTL 8 .Os .Sh NAME @@ -37,18 +37,15 @@ .Nm .Cm add .Ar name -.Cm --interpreter +.Fl -interpreter .Ar path -.Cm --magic +.Fl -magic .Ar magic -.Cm --size +.Fl -size .Ar size -.Op Cm --mask Ar mask -.Op Cm --offset Ar offset -.Op Cm --set-enabled -.Nm -.Cm remove -.Ar name +.Op Fl -mask Ar mask +.Op Fl -offset Ar offset +.Op Fl -set-enabled .Nm .Cm disable .Ar name @@ -56,10 +53,13 @@ .Cm enable .Ar name .Nm +.Cm list +.Nm .Cm lookup .Ar name .Nm -.Cm list +.Cm remove +.Ar name .Sh DESCRIPTION The .Nm @@ -78,22 +78,23 @@ Operation must be one of the following: .It Xo .Cm add .Ar name -.Cm --interpreter +.Fl -interpreter .Ar path -.Cm --magic +.Fl -magic .Ar magic -.Cm --size +.Fl -size .Ar size -.Op Cm --mask Ar mask -.Op Cm --offset Ar offset -.Op Cm --set-enabled +.Op Fl -mask Ar mask +.Op Fl -offset Ar offset +.Op Fl -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, +.Ar name , +a +.Ar path +to the interpreter, header .Ar magic bytes that uniquely identify a suitable binary for the activator, @@ -103,7 +104,7 @@ of the .Ar magic in bytes. .Pp -Optionally you may specify a +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 @@ -112,14 +113,14 @@ do not uniquely indentify the binary file's type. An .Ar offset may be specified for the magic bytes using the -.Cm --offset +.Fl -offset option. By default the .Ar offset is zero. .Pp To enable the activator entry the -.Cm --set-enabled +.Fl -set-enabled option is used. The activator default state is disabled. .Pp @@ -130,55 +131,69 @@ may also contain arguments for the interpreter including 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 list +Take a snapshot and print all the activator entries currently configured. .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. +.It Cm remove Ar name +Remove the activator entry identified with +.Ar name . .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 +Add an image activator to run the LLVM interpreter +.Po +.Xr lli 1 +.Pc +on bitcode +compiled files and set its state to enabled. +In this example .Ar #a is replaced with the old .Dv argv0 -value so that 'lli' can fake its -.Dv argv0 . -Set its state to enabled. +value so that +.Xr lli 1 +can fake its +.Dv argv0 : +.Bd -literal -offset indent +# binmiscctl add llvmbc --interpreter ''/usr/bin/lli \e + --fake-argv0=#a'' --magic ''BC\\xc0\\xde'' --size 4 \e + --set-enabled +.Ed .Pp Set the state of the .Ar llvmbc image activator to disabled: -.Dl # binmiscctl disable llvmbc +.Bd -literal -offset indent +# binmiscctl disable llvmbc +.Ed .Pp Set the state of the .Ar llvmbc image activator to enabled: -.Dl # binmiscctl enable llvmbc +.Bd -literal -offset indent +# binmiscctl enable llvmbc +.Ed .Pp Delete the .Ar llvmbc image activator: -.Dl # binmiscctl remove llvmbc +.Bd -literal -offset indent +# binmiscctl remove llvmbc +.Ed .Pp Look up and list the record for the .Ar llvmbc image activator: -.Dl # binmiscctl lookup llvmbc +.Bd -literal -offset indent +# binmiscctl lookup llvmbc +.Ed .Pp Add QEMU bsd-user program as an image activator for ARM AARCH64 binaries: .Bd -literal -offset indent @@ -267,11 +282,10 @@ Add QEMU bsd-user program as an image activator for SPARC64 binaries: \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 +.Bd -literal -offset ident D=/path/to/chroot cd /usr/src mkdir -p $D @@ -284,15 +298,17 @@ With from the .Fx Ports Collection, the emulator must be copied into the jail path -specified in the binmiscctl command. +specified in the +.Nm +command. Using the example above: -.Bd -literal +.Bd -literal -offset -ident 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 +.Bd -literal -offset -ident chroot $D .Ed .Sh SEE ALSO @@ -301,9 +317,9 @@ chroot $D .Xr jail 8 .Sh HISTORY The -.Cm binmiscctl +.Nm command was added in .Fx 10.1 . It was developed to support the imgact_binmisc kernel module. .Sh AUTHORS -Stacey D Son +.An Stacey D Son Aq Mt sson@FreeBSD.org |