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Linus Torvalds1da177e2005-04-16 15:20:36 -07001config BINFMT_ELF
2 bool "Kernel support for ELF binaries"
David Howells2919b512006-01-08 01:01:16 -08003 depends on MMU && (BROKEN || !FRV)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 default y
5 ---help---
6 ELF (Executable and Linkable Format) is a format for libraries and
7 executables used across different architectures and operating
8 systems. Saying Y here will enable your kernel to run ELF binaries
9 and enlarge it by about 13 KB. ELF support under Linux has now all
10 but replaced the traditional Linux a.out formats (QMAGIC and ZMAGIC)
11 because it is portable (this does *not* mean that you will be able
12 to run executables from different architectures or operating systems
13 however) and makes building run-time libraries very easy. Many new
14 executables are distributed solely in ELF format. You definitely
15 want to say Y here.
16
17 Information about ELF is contained in the ELF HOWTO available from
18 <http://www.tldp.org/docs.html#howto>.
19
20 If you find that after upgrading from Linux kernel 1.2 and saying Y
21 here, you still can't run any ELF binaries (they just crash), then
22 you'll have to install the newest ELF runtime libraries, including
23 ld.so (check the file <file:Documentation/Changes> for location and
24 latest version).
25
Roland McGrathb9d36d52008-01-30 13:31:46 +010026config COMPAT_BINFMT_ELF
27 bool
Alexey Dobriyan4cea5ce2008-10-15 22:04:17 -070028 depends on COMPAT && BINFMT_ELF
Roland McGrathb9d36d52008-01-30 13:31:46 +010029
Paul Burton774c1052014-09-11 08:30:16 +010030config ARCH_BINFMT_ELF_STATE
31 bool
32
Linus Torvalds1da177e2005-04-16 15:20:36 -070033config BINFMT_ELF_FDPIC
34 bool "Kernel support for FDPIC ELF binaries"
35 default y
Mark Salterfce24472012-04-23 10:02:08 -040036 depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 help
38 ELF FDPIC binaries are based on ELF, but allow the individual load
39 segments of a binary to be located in memory independently of each
40 other. This makes this format ideal for use in environments where no
41 MMU is available as it still permits text segments to be shared,
42 even if data segments are not.
43
44 It is also possible to run FDPIC ELF binaries on MMU linux also.
45
Roland McGrath656eb2c2008-10-18 20:28:23 -070046config CORE_DUMP_DEFAULT_ELF_HEADERS
47 bool "Write ELF core dumps with partial segments"
Roland McGrath89502152010-10-27 15:34:09 -070048 default y
David Brownell2d96d102009-01-09 16:40:52 -080049 depends on BINFMT_ELF && ELF_CORE
Roland McGrath656eb2c2008-10-18 20:28:23 -070050 help
51 ELF core dump files describe each memory mapping of the crashed
52 process, and can contain or omit the memory contents of each one.
53 The contents of an unmodified text mapping are omitted by default.
54
55 For an unmodified text mapping of an ELF object, including just
56 the first page of the file in a core dump makes it possible to
57 identify the build ID bits in the file, without paying the i/o
58 cost and disk space to dump all the text. However, versions of
59 GDB before 6.7 are confused by ELF core dump files in this format.
60
61 The core dump behavior can be controlled per process using
62 the /proc/PID/coredump_filter pseudo-file; this setting is
63 inherited. See Documentation/filesystems/proc.txt for details.
64
65 This config option changes the default setting of coredump_filter
Roland McGrath89502152010-10-27 15:34:09 -070066 seen at boot time. If unsure, say Y.
Roland McGrath656eb2c2008-10-18 20:28:23 -070067
Josh Triplett2535e0d2013-04-30 15:27:44 -070068config BINFMT_SCRIPT
69 tristate "Kernel support for scripts starting with #!"
70 default y
71 help
72 Say Y here if you want to execute interpreted scripts starting with
73 #! followed by the path to an interpreter.
74
75 You can build this support as a module; however, until that module
76 gets loaded, you cannot run scripts. Thus, if you want to load this
77 module from an initramfs, the portion of the initramfs before loading
78 this module must consist of compiled binaries only.
79
80 Most systems will not boot if you say M or N here. If unsure, say Y.
81
Linus Torvalds1da177e2005-04-16 15:20:36 -070082config BINFMT_FLAT
Adrian Bunk3202e182008-04-29 00:59:02 -070083 bool "Kernel support for flat binaries"
Adrian Bunkb8c141e82008-06-05 22:45:55 -070084 depends on !MMU && (!FRV || BROKEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 help
86 Support uClinux FLAT format binaries.
87
88config BINFMT_ZFLAT
89 bool "Enable ZFLAT support"
90 depends on BINFMT_FLAT
91 select ZLIB_INFLATE
92 help
93 Support FLAT format compressed binaries
94
95config BINFMT_SHARED_FLAT
96 bool "Enable shared FLAT support"
97 depends on BINFMT_FLAT
98 help
99 Support FLAT shared libraries
100
David Woodhousee17c6d52008-06-17 12:19:34 +0100101config HAVE_AOUT
102 def_bool n
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104config BINFMT_AOUT
105 tristate "Kernel support for a.out and ECOFF binaries"
David Woodhousee17c6d52008-06-17 12:19:34 +0100106 depends on HAVE_AOUT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 ---help---
108 A.out (Assembler.OUTput) is a set of formats for libraries and
109 executables used in the earliest versions of UNIX. Linux used
110 the a.out formats QMAGIC and ZMAGIC until they were replaced
111 with the ELF format.
112
113 The conversion to ELF started in 1995. This option is primarily
114 provided for historical interest and for the benefit of those
115 who need to run binaries from that era.
116
117 Most people should answer N here. If you think you may have
118 occasional use for this format, enable module support above
119 and answer M here to compile this support as a module called
120 binfmt_aout.
121
122 If any crucial components of your system (such as /sbin/init
123 or /lib/ld.so) are still in a.out format, you will have to
124 say Y here.
125
126config OSF4_COMPAT
127 bool "OSF/1 v4 readv/writev compatibility"
128 depends on ALPHA && BINFMT_AOUT
129 help
130 Say Y if you are using OSF/1 binaries (like Netscape and Acrobat)
131 with v4 shared libraries freely available from Compaq. If you're
132 going to use shared libraries from Tru64 version 5.0 or later, say N.
133
134config BINFMT_EM86
135 tristate "Kernel support for Linux/Intel ELF binaries"
136 depends on ALPHA
137 ---help---
138 Say Y here if you want to be able to execute Linux/Intel ELF
139 binaries just like native Alpha binaries on your Alpha machine. For
140 this to work, you need to have the emulator /usr/bin/em86 in place.
141
142 You can get the same functionality by saying N here and saying Y to
143 "Kernel support for MISC binaries".
144
145 You may answer M to compile the emulation support as a module and
146 later load the module when you want to use a Linux/Intel binary. The
147 module will be called binfmt_em86. If unsure, say Y.
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149config BINFMT_MISC
150 tristate "Kernel support for MISC binaries"
151 ---help---
152 If you say Y here, it will be possible to plug wrapper-driven binary
153 formats into the kernel. You will like this especially when you use
154 programs that need an interpreter to run like Java, Python, .NET or
155 Emacs-Lisp. It's also useful if you often run DOS executables under
156 the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from
157 <http://www.tldp.org/docs.html#howto>). Once you have
158 registered such a binary class with the kernel, you can start one of
159 those programs simply by typing in its name at a shell prompt; Linux
160 will automatically feed it to the correct interpreter.
161
162 You can do other nice things, too. Read the file
163 <file:Documentation/binfmt_misc.txt> to learn how to use this
164 feature, <file:Documentation/java.txt> for information about how
165 to include Java support. and <file:Documentation/mono.txt> for
166 information about how to include Mono-based .NET support.
167
168 To use binfmt_misc, you will need to mount it:
169 mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
170
171 You may say M here for module support and later load the module when
172 you have use for it; the module is called binfmt_misc. If you
173 don't know what to answer at this point, say Y.
Alex Kelly046d6622012-10-04 17:15:23 -0700174
175config COREDUMP
176 bool "Enable core dump support" if EXPERT
177 default y
178 help
179 This option enables support for performing core dumps. You almost
180 certainly want to say Y here. Not necessary on systems that never
181 need debugging or only ever run flawless code.