[mirror_ubuntu-artful-kernel.git] / fs / Kconfig.binfmt

config BINFMT_ELF
	bool "Kernel support for ELF binaries"
	depends on MMU && (BROKEN || !FRV)
	select ELFCORE
	default y
	---help---
	  ELF (Executable and Linkable Format) is a format for libraries and
	  executables used across different architectures and operating
	  systems. Saying Y here will enable your kernel to run ELF binaries
	  and enlarge it by about 13 KB. ELF support under Linux has now all
	  but replaced the traditional Linux a.out formats (QMAGIC and ZMAGIC)
	  because it is portable (this does *not* mean that you will be able
	  to run executables from different architectures or operating systems
	  however) and makes building run-time libraries very easy. Many new
	  executables are distributed solely in ELF format. You definitely
	  want to say Y here.

	  Information about ELF is contained in the ELF HOWTO available from
	  <http://www.tldp.org/docs.html#howto>.

	  If you find that after upgrading from Linux kernel 1.2 and saying Y
	  here, you still can't run any ELF binaries (they just crash), then
	  you'll have to install the newest ELF runtime libraries, including
	  ld.so (check the file <file:Documentation/Changes> for location and
	  latest version).

config COMPAT_BINFMT_ELF
	bool
	depends on COMPAT && BINFMT_ELF
	select ELFCORE

config ARCH_BINFMT_ELF_STATE
	bool

config BINFMT_ELF_FDPIC
	bool "Kernel support for FDPIC ELF binaries"
	default y
	depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X)
	select ELFCORE
	help
	  ELF FDPIC binaries are based on ELF, but allow the individual load
	  segments of a binary to be located in memory independently of each
	  other. This makes this format ideal for use in environments where no
	  MMU is available as it still permits text segments to be shared,
	  even if data segments are not.

	  It is also possible to run FDPIC ELF binaries on MMU linux also.

config ELFCORE
	bool
	help
	  This option enables kernel/elfcore.o.

config CORE_DUMP_DEFAULT_ELF_HEADERS
	bool "Write ELF core dumps with partial segments"
	default y
	depends on BINFMT_ELF && ELF_CORE
	help
	  ELF core dump files describe each memory mapping of the crashed
	  process, and can contain or omit the memory contents of each one.
	  The contents of an unmodified text mapping are omitted by default.

	  For an unmodified text mapping of an ELF object, including just
	  the first page of the file in a core dump makes it possible to
	  identify the build ID bits in the file, without paying the i/o
	  cost and disk space to dump all the text.  However, versions of
	  GDB before 6.7 are confused by ELF core dump files in this format.

	  The core dump behavior can be controlled per process using
	  the /proc/PID/coredump_filter pseudo-file; this setting is
	  inherited.  See Documentation/filesystems/proc.txt for details.

	  This config option changes the default setting of coredump_filter
	  seen at boot time.  If unsure, say Y.

config BINFMT_SCRIPT
	tristate "Kernel support for scripts starting with #!"
	default y
	help
	  Say Y here if you want to execute interpreted scripts starting with
	  #! followed by the path to an interpreter.

	  You can build this support as a module; however, until that module
	  gets loaded, you cannot run scripts.  Thus, if you want to load this
	  module from an initramfs, the portion of the initramfs before loading
	  this module must consist of compiled binaries only.

	  Most systems will not boot if you say M or N here.  If unsure, say Y.

config BINFMT_FLAT
	bool "Kernel support for flat binaries"
	depends on !MMU || ARM || M68K
	depends on !FRV || BROKEN
	help
	  Support uClinux FLAT format binaries.

config BINFMT_ZFLAT
	bool "Enable ZFLAT support"
	depends on BINFMT_FLAT
	select ZLIB_INFLATE
	help
	  Support FLAT format compressed binaries

config BINFMT_SHARED_FLAT
	bool "Enable shared FLAT support"
	depends on BINFMT_FLAT
	help
	  Support FLAT shared libraries

config HAVE_AOUT
       def_bool n

config BINFMT_AOUT
	tristate "Kernel support for a.out and ECOFF binaries"
	depends on HAVE_AOUT
	---help---
	  A.out (Assembler.OUTput) is a set of formats for libraries and
	  executables used in the earliest versions of UNIX.  Linux used
	  the a.out formats QMAGIC and ZMAGIC until they were replaced
	  with the ELF format.

	  The conversion to ELF started in 1995.  This option is primarily
	  provided for historical interest and for the benefit of those
	  who need to run binaries from that era.

	  Most people should answer N here.  If you think you may have
	  occasional use for this format, enable module support above
	  and answer M here to compile this support as a module called
	  binfmt_aout.

	  If any crucial components of your system (such as /sbin/init
	  or /lib/ld.so) are still in a.out format, you will have to
	  say Y here.

config OSF4_COMPAT
	bool "OSF/1 v4 readv/writev compatibility"
	depends on ALPHA && BINFMT_AOUT
	help
	  Say Y if you are using OSF/1 binaries (like Netscape and Acrobat)
	  with v4 shared libraries freely available from Compaq. If you're
	  going to use shared libraries from Tru64 version 5.0 or later, say N.

config BINFMT_EM86
	tristate "Kernel support for Linux/Intel ELF binaries"
	depends on ALPHA
	---help---
	  Say Y here if you want to be able to execute Linux/Intel ELF
	  binaries just like native Alpha binaries on your Alpha machine. For
	  this to work, you need to have the emulator /usr/bin/em86 in place.

	  You can get the same functionality by saying N here and saying Y to
	  "Kernel support for MISC binaries".

	  You may answer M to compile the emulation support as a module and
	  later load the module when you want to use a Linux/Intel binary. The
	  module will be called binfmt_em86. If unsure, say Y.

config BINFMT_MISC
	tristate "Kernel support for MISC binaries"
	---help---
	  If you say Y here, it will be possible to plug wrapper-driven binary
	  formats into the kernel. You will like this especially when you use
	  programs that need an interpreter to run like Java, Python, .NET or
	  Emacs-Lisp. It's also useful if you often run DOS executables under
	  the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>). Once you have
	  registered such a binary class with the kernel, you can start one of
	  those programs simply by typing in its name at a shell prompt; Linux
	  will automatically feed it to the correct interpreter.

	  You can do other nice things, too. Read the file
	  <file:Documentation/binfmt_misc.txt> to learn how to use this
	  feature, <file:Documentation/admin-guide/java.rst> for information about how
	  to include Java support. and <file:Documentation/admin-guide/mono.rst> for
          information about how to include Mono-based .NET support.

          To use binfmt_misc, you will need to mount it:
		mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc

	  You may say M here for module support and later load the module when
	  you have use for it; the module is called binfmt_misc. If you
	  don't know what to answer at this point, say Y.

config COREDUMP
	bool "Enable core dump support" if EXPERT
	default y
	help
	  This option enables support for performing core dumps. You almost
	  certainly want to say Y here. Not necessary on systems that never
	  need debugging or only ever run flawless code.
Commit	Line	Data
1da177e4 LT	1	config BINFMT_ELF
1da177e4 LT	2	bool "Kernel support for ELF binaries"
2919b510	3	depends on MMU && (BROKEN \|\| !FRV)
f43edca7	4	select ELFCORE
1da177e4 LT	5	default y
	6	---help---
	7	ELF (Executable and Linkable Format) is a format for libraries and
	8	executables used across different architectures and operating
	9	systems. Saying Y here will enable your kernel to run ELF binaries
	10	and enlarge it by about 13 KB. ELF support under Linux has now all
	11	but replaced the traditional Linux a.out formats (QMAGIC and ZMAGIC)
	12	because it is portable (this does not mean that you will be able
	13	to run executables from different architectures or operating systems
	14	however) and makes building run-time libraries very easy. Many new
	15	executables are distributed solely in ELF format. You definitely
	16	want to say Y here.
	17
	18	Information about ELF is contained in the ELF HOWTO available from
	19	<http://www.tldp.org/docs.html#howto>.
	20
	21	If you find that after upgrading from Linux kernel 1.2 and saying Y
	22	here, you still can't run any ELF binaries (they just crash), then
	23	you'll have to install the newest ELF runtime libraries, including
	24	ld.so (check the file <file:Documentation/Changes> for location and
	25	latest version).
	26
b9d36d5d RM	27	config COMPAT_BINFMT_ELF
b9d36d5d RM	28	bool
4cea5ceb	29	depends on COMPAT && BINFMT_ELF
f43edca7	30	select ELFCORE
b9d36d5d	31
774c105e PB	32	config ARCH_BINFMT_ELF_STATE
	33	bool
	34
1da177e4 LT	35	config BINFMT_ELF_FDPIC
	36	bool "Kernel support for FDPIC ELF binaries"
	37	default y
fce24476	38	depends on (FRV \|\| BLACKFIN \|\| (SUPERH32 && !MMU) \|\| C6X)
f43edca7	39	select ELFCORE
1da177e4 LT	40	help
	41	ELF FDPIC binaries are based on ELF, but allow the individual load
	42	segments of a binary to be located in memory independently of each
	43	other. This makes this format ideal for use in environments where no
	44	MMU is available as it still permits text segments to be shared,
	45	even if data segments are not.
	46
	47	It is also possible to run FDPIC ELF binaries on MMU linux also.
	48
f43edca7 RB	49	config ELFCORE
	50	bool
	51	help
	52	This option enables kernel/elfcore.o.
	53
656eb2cd RM	54	config CORE_DUMP_DEFAULT_ELF_HEADERS
656eb2cd RM	55	bool "Write ELF core dumps with partial segments"
89502155	56	default y
2d96d105	57	depends on BINFMT_ELF && ELF_CORE
656eb2cd RM	58	help
	59	ELF core dump files describe each memory mapping of the crashed
	60	process, and can contain or omit the memory contents of each one.
	61	The contents of an unmodified text mapping are omitted by default.
	62
	63	For an unmodified text mapping of an ELF object, including just
	64	the first page of the file in a core dump makes it possible to
	65	identify the build ID bits in the file, without paying the i/o
	66	cost and disk space to dump all the text. However, versions of
	67	GDB before 6.7 are confused by ELF core dump files in this format.
	68
	69	The core dump behavior can be controlled per process using
	70	the /proc/PID/coredump_filter pseudo-file; this setting is
	71	inherited. See Documentation/filesystems/proc.txt for details.
	72
	73	This config option changes the default setting of coredump_filter
89502155	74	seen at boot time. If unsure, say Y.
656eb2cd	75
2535e0d7 JT	76	config BINFMT_SCRIPT
	77	tristate "Kernel support for scripts starting with #!"
	78	default y
	79	help
	80	Say Y here if you want to execute interpreted scripts starting with
	81	#! followed by the path to an interpreter.
	82
	83	You can build this support as a module; however, until that module
	84	gets loaded, you cannot run scripts. Thus, if you want to load this
	85	module from an initramfs, the portion of the initramfs before loading
	86	this module must consist of compiled binaries only.
	87
	88	Most systems will not boot if you say M or N here. If unsure, say Y.
	89
1da177e4	90	config BINFMT_FLAT
3202e181	91	bool "Kernel support for flat binaries"
d782e426	92	depends on !MMU \|\| ARM \|\| M68K
002d2f01	93	depends on !FRV \|\| BROKEN
1da177e4 LT	94	help
	95	Support uClinux FLAT format binaries.
	96
	97	config BINFMT_ZFLAT
	98	bool "Enable ZFLAT support"
	99	depends on BINFMT_FLAT
	100	select ZLIB_INFLATE
	101	help
	102	Support FLAT format compressed binaries
	103
	104	config BINFMT_SHARED_FLAT
	105	bool "Enable shared FLAT support"
	106	depends on BINFMT_FLAT
	107	help
	108	Support FLAT shared libraries
	109
e17c6d56 DW	110	config HAVE_AOUT
	111	def_bool n
	112
1da177e4 LT	113	config BINFMT_AOUT
1da177e4 LT	114	tristate "Kernel support for a.out and ECOFF binaries"
e17c6d56	115	depends on HAVE_AOUT
1da177e4 LT	116	---help---
	117	A.out (Assembler.OUTput) is a set of formats for libraries and
	118	executables used in the earliest versions of UNIX. Linux used
	119	the a.out formats QMAGIC and ZMAGIC until they were replaced
	120	with the ELF format.
	121
	122	The conversion to ELF started in 1995. This option is primarily
	123	provided for historical interest and for the benefit of those
	124	who need to run binaries from that era.
	125
	126	Most people should answer N here. If you think you may have
	127	occasional use for this format, enable module support above
	128	and answer M here to compile this support as a module called
	129	binfmt_aout.
	130
	131	If any crucial components of your system (such as /sbin/init
	132	or /lib/ld.so) are still in a.out format, you will have to
	133	say Y here.
	134
	135	config OSF4_COMPAT
	136	bool "OSF/1 v4 readv/writev compatibility"
	137	depends on ALPHA && BINFMT_AOUT
	138	help
	139	Say Y if you are using OSF/1 binaries (like Netscape and Acrobat)
	140	with v4 shared libraries freely available from Compaq. If you're
	141	going to use shared libraries from Tru64 version 5.0 or later, say N.
	142
	143	config BINFMT_EM86
	144	tristate "Kernel support for Linux/Intel ELF binaries"
	145	depends on ALPHA
	146	---help---
	147	Say Y here if you want to be able to execute Linux/Intel ELF
	148	binaries just like native Alpha binaries on your Alpha machine. For
	149	this to work, you need to have the emulator /usr/bin/em86 in place.
	150
	151	You can get the same functionality by saying N here and saying Y to
	152	"Kernel support for MISC binaries".
	153
	154	You may answer M to compile the emulation support as a module and
	155	later load the module when you want to use a Linux/Intel binary. The
	156	module will be called binfmt_em86. If unsure, say Y.
	157
1da177e4 LT	158	config BINFMT_MISC
	159	tristate "Kernel support for MISC binaries"
	160	---help---
	161	If you say Y here, it will be possible to plug wrapper-driven binary
	162	formats into the kernel. You will like this especially when you use
	163	programs that need an interpreter to run like Java, Python, .NET or
	164	Emacs-Lisp. It's also useful if you often run DOS executables under
	165	the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from
	166	<http://www.tldp.org/docs.html#howto>). Once you have
	167	registered such a binary class with the kernel, you can start one of
	168	those programs simply by typing in its name at a shell prompt; Linux
	169	will automatically feed it to the correct interpreter.
	170
	171	You can do other nice things, too. Read the file
	172	<file:Documentation/binfmt_misc.txt> to learn how to use this
8c27ceff MCC	173	feature, <file:Documentation/admin-guide/java.rst> for information about how
8c27ceff MCC	174	to include Java support. and <file:Documentation/admin-guide/mono.rst> for
1da177e4 LT	175	information about how to include Mono-based .NET support.
	176
	177	To use binfmt_misc, you will need to mount it:
	178	mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
	179
	180	You may say M here for module support and later load the module when
	181	you have use for it; the module is called binfmt_misc. If you
	182	don't know what to answer at this point, say Y.
046d662f AK	183
	184	config COREDUMP
	185	bool "Enable core dump support" if EXPERT
	186	default y
	187	help
	188	This option enables support for performing core dumps. You almost
	189	certainly want to say Y here. Not necessary on systems that never
	190	need debugging or only ever run flawless code.