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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
Linus Torvalds1da177e2005-04-16 15:20:36 -070030config BINFMT_ELF_FDPIC
31 bool "Kernel support for FDPIC ELF binaries"
32 default y
Paul Mundt3bc24a12008-05-19 13:40:12 +090033 depends on (FRV || BLACKFIN || (SUPERH32 && !MMU))
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 help
35 ELF FDPIC binaries are based on ELF, but allow the individual load
36 segments of a binary to be located in memory independently of each
37 other. This makes this format ideal for use in environments where no
38 MMU is available as it still permits text segments to be shared,
39 even if data segments are not.
40
41 It is also possible to run FDPIC ELF binaries on MMU linux also.
42
Roland McGrath656eb2c2008-10-18 20:28:23 -070043config CORE_DUMP_DEFAULT_ELF_HEADERS
44 bool "Write ELF core dumps with partial segments"
45 default n
46 depends on BINFMT_ELF
47 help
48 ELF core dump files describe each memory mapping of the crashed
49 process, and can contain or omit the memory contents of each one.
50 The contents of an unmodified text mapping are omitted by default.
51
52 For an unmodified text mapping of an ELF object, including just
53 the first page of the file in a core dump makes it possible to
54 identify the build ID bits in the file, without paying the i/o
55 cost and disk space to dump all the text. However, versions of
56 GDB before 6.7 are confused by ELF core dump files in this format.
57
58 The core dump behavior can be controlled per process using
59 the /proc/PID/coredump_filter pseudo-file; this setting is
60 inherited. See Documentation/filesystems/proc.txt for details.
61
62 This config option changes the default setting of coredump_filter
63 seen at boot time. If unsure, say N.
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065config BINFMT_FLAT
Adrian Bunk3202e182008-04-29 00:59:02 -070066 bool "Kernel support for flat binaries"
Adrian Bunkb8c141e2008-06-05 22:45:55 -070067 depends on !MMU && (!FRV || BROKEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 help
69 Support uClinux FLAT format binaries.
70
71config BINFMT_ZFLAT
72 bool "Enable ZFLAT support"
73 depends on BINFMT_FLAT
74 select ZLIB_INFLATE
75 help
76 Support FLAT format compressed binaries
77
78config BINFMT_SHARED_FLAT
79 bool "Enable shared FLAT support"
80 depends on BINFMT_FLAT
81 help
82 Support FLAT shared libraries
83
David Woodhousee17c6d52008-06-17 12:19:34 +010084config HAVE_AOUT
85 def_bool n
86
Linus Torvalds1da177e2005-04-16 15:20:36 -070087config BINFMT_AOUT
88 tristate "Kernel support for a.out and ECOFF binaries"
David Woodhousee17c6d52008-06-17 12:19:34 +010089 depends on HAVE_AOUT
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 ---help---
91 A.out (Assembler.OUTput) is a set of formats for libraries and
92 executables used in the earliest versions of UNIX. Linux used
93 the a.out formats QMAGIC and ZMAGIC until they were replaced
94 with the ELF format.
95
96 The conversion to ELF started in 1995. This option is primarily
97 provided for historical interest and for the benefit of those
98 who need to run binaries from that era.
99
100 Most people should answer N here. If you think you may have
101 occasional use for this format, enable module support above
102 and answer M here to compile this support as a module called
103 binfmt_aout.
104
105 If any crucial components of your system (such as /sbin/init
106 or /lib/ld.so) are still in a.out format, you will have to
107 say Y here.
108
109config OSF4_COMPAT
110 bool "OSF/1 v4 readv/writev compatibility"
111 depends on ALPHA && BINFMT_AOUT
112 help
113 Say Y if you are using OSF/1 binaries (like Netscape and Acrobat)
114 with v4 shared libraries freely available from Compaq. If you're
115 going to use shared libraries from Tru64 version 5.0 or later, say N.
116
117config BINFMT_EM86
118 tristate "Kernel support for Linux/Intel ELF binaries"
119 depends on ALPHA
120 ---help---
121 Say Y here if you want to be able to execute Linux/Intel ELF
122 binaries just like native Alpha binaries on your Alpha machine. For
123 this to work, you need to have the emulator /usr/bin/em86 in place.
124
125 You can get the same functionality by saying N here and saying Y to
126 "Kernel support for MISC binaries".
127
128 You may answer M to compile the emulation support as a module and
129 later load the module when you want to use a Linux/Intel binary. The
130 module will be called binfmt_em86. If unsure, say Y.
131
132config BINFMT_SOM
133 tristate "Kernel support for SOM binaries"
134 depends on PARISC && HPUX
135 help
136 SOM is a binary executable format inherited from HP/UX. Say
137 Y here to be able to load and execute SOM binaries directly.
138
139config BINFMT_MISC
140 tristate "Kernel support for MISC binaries"
141 ---help---
142 If you say Y here, it will be possible to plug wrapper-driven binary
143 formats into the kernel. You will like this especially when you use
144 programs that need an interpreter to run like Java, Python, .NET or
145 Emacs-Lisp. It's also useful if you often run DOS executables under
146 the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from
147 <http://www.tldp.org/docs.html#howto>). Once you have
148 registered such a binary class with the kernel, you can start one of
149 those programs simply by typing in its name at a shell prompt; Linux
150 will automatically feed it to the correct interpreter.
151
152 You can do other nice things, too. Read the file
153 <file:Documentation/binfmt_misc.txt> to learn how to use this
154 feature, <file:Documentation/java.txt> for information about how
155 to include Java support. and <file:Documentation/mono.txt> for
156 information about how to include Mono-based .NET support.
157
158 To use binfmt_misc, you will need to mount it:
159 mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
160
161 You may say M here for module support and later load the module when
162 you have use for it; the module is called binfmt_misc. If you
163 don't know what to answer at this point, say Y.