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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
David Daneye39f5602012-01-10 15:10:21 -080030config ARCH_BINFMT_ELF_RANDOMIZE_PIE
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
Paul Mundt3bc24a12008-05-19 13:40:12 +090036 depends on (FRV || BLACKFIN || (SUPERH32 && !MMU))
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070068config BINFMT_FLAT
Adrian Bunk3202e182008-04-29 00:59:02 -070069 bool "Kernel support for flat binaries"
Adrian Bunkb8c141e2008-06-05 22:45:55 -070070 depends on !MMU && (!FRV || BROKEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 help
72 Support uClinux FLAT format binaries.
73
74config BINFMT_ZFLAT
75 bool "Enable ZFLAT support"
76 depends on BINFMT_FLAT
77 select ZLIB_INFLATE
78 help
79 Support FLAT format compressed binaries
80
81config BINFMT_SHARED_FLAT
82 bool "Enable shared FLAT support"
83 depends on BINFMT_FLAT
84 help
85 Support FLAT shared libraries
86
David Woodhousee17c6d52008-06-17 12:19:34 +010087config HAVE_AOUT
88 def_bool n
89
Linus Torvalds1da177e2005-04-16 15:20:36 -070090config BINFMT_AOUT
91 tristate "Kernel support for a.out and ECOFF binaries"
David Woodhousee17c6d52008-06-17 12:19:34 +010092 depends on HAVE_AOUT
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 ---help---
94 A.out (Assembler.OUTput) is a set of formats for libraries and
95 executables used in the earliest versions of UNIX. Linux used
96 the a.out formats QMAGIC and ZMAGIC until they were replaced
97 with the ELF format.
98
99 The conversion to ELF started in 1995. This option is primarily
100 provided for historical interest and for the benefit of those
101 who need to run binaries from that era.
102
103 Most people should answer N here. If you think you may have
104 occasional use for this format, enable module support above
105 and answer M here to compile this support as a module called
106 binfmt_aout.
107
108 If any crucial components of your system (such as /sbin/init
109 or /lib/ld.so) are still in a.out format, you will have to
110 say Y here.
111
112config OSF4_COMPAT
113 bool "OSF/1 v4 readv/writev compatibility"
114 depends on ALPHA && BINFMT_AOUT
115 help
116 Say Y if you are using OSF/1 binaries (like Netscape and Acrobat)
117 with v4 shared libraries freely available from Compaq. If you're
118 going to use shared libraries from Tru64 version 5.0 or later, say N.
119
120config BINFMT_EM86
121 tristate "Kernel support for Linux/Intel ELF binaries"
122 depends on ALPHA
123 ---help---
124 Say Y here if you want to be able to execute Linux/Intel ELF
125 binaries just like native Alpha binaries on your Alpha machine. For
126 this to work, you need to have the emulator /usr/bin/em86 in place.
127
128 You can get the same functionality by saying N here and saying Y to
129 "Kernel support for MISC binaries".
130
131 You may answer M to compile the emulation support as a module and
132 later load the module when you want to use a Linux/Intel binary. The
133 module will be called binfmt_em86. If unsure, say Y.
134
135config BINFMT_SOM
136 tristate "Kernel support for SOM binaries"
137 depends on PARISC && HPUX
138 help
139 SOM is a binary executable format inherited from HP/UX. Say
140 Y here to be able to load and execute SOM binaries directly.
141
142config BINFMT_MISC
143 tristate "Kernel support for MISC binaries"
144 ---help---
145 If you say Y here, it will be possible to plug wrapper-driven binary
146 formats into the kernel. You will like this especially when you use
147 programs that need an interpreter to run like Java, Python, .NET or
148 Emacs-Lisp. It's also useful if you often run DOS executables under
149 the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from
150 <http://www.tldp.org/docs.html#howto>). Once you have
151 registered such a binary class with the kernel, you can start one of
152 those programs simply by typing in its name at a shell prompt; Linux
153 will automatically feed it to the correct interpreter.
154
155 You can do other nice things, too. Read the file
156 <file:Documentation/binfmt_misc.txt> to learn how to use this
157 feature, <file:Documentation/java.txt> for information about how
158 to include Java support. and <file:Documentation/mono.txt> for
159 information about how to include Mono-based .NET support.
160
161 To use binfmt_misc, you will need to mount it:
162 mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
163
164 You may say M here for module support and later load the module when
165 you have use for it; the module is called binfmt_misc. If you
166 don't know what to answer at this point, say Y.