1config BINFMT_ELF 2 bool "Kernel support for ELF binaries" 3 depends on MMU && (BROKEN || !FRV) 4 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 26config COMPAT_BINFMT_ELF 27 bool 28 depends on COMPAT && BINFMT_ELF 29 30config BINFMT_ELF_FDPIC 31 bool "Kernel support for FDPIC ELF binaries" 32 default y 33 depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X) 34 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 43config CORE_DUMP_DEFAULT_ELF_HEADERS 44 bool "Write ELF core dumps with partial segments" 45 default y 46 depends on BINFMT_ELF && ELF_CORE 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 Y. 64 65config BINFMT_SCRIPT 66 tristate "Kernel support for scripts starting with #!" 67 default y 68 help 69 Say Y here if you want to execute interpreted scripts starting with 70 #! followed by the path to an interpreter. 71 72 You can build this support as a module; however, until that module 73 gets loaded, you cannot run scripts. Thus, if you want to load this 74 module from an initramfs, the portion of the initramfs before loading 75 this module must consist of compiled binaries only. 76 77 Most systems will not boot if you say M or N here. If unsure, say Y. 78 79config BINFMT_FLAT 80 bool "Kernel support for flat binaries" 81 depends on !MMU && (!FRV || BROKEN) 82 help 83 Support uClinux FLAT format binaries. 84 85config BINFMT_ZFLAT 86 bool "Enable ZFLAT support" 87 depends on BINFMT_FLAT 88 select ZLIB_INFLATE 89 help 90 Support FLAT format compressed binaries 91 92config BINFMT_SHARED_FLAT 93 bool "Enable shared FLAT support" 94 depends on BINFMT_FLAT 95 help 96 Support FLAT shared libraries 97 98config HAVE_AOUT 99 def_bool n 100 101config BINFMT_AOUT 102 tristate "Kernel support for a.out and ECOFF binaries" 103 depends on HAVE_AOUT 104 ---help--- 105 A.out (Assembler.OUTput) is a set of formats for libraries and 106 executables used in the earliest versions of UNIX. Linux used 107 the a.out formats QMAGIC and ZMAGIC until they were replaced 108 with the ELF format. 109 110 The conversion to ELF started in 1995. This option is primarily 111 provided for historical interest and for the benefit of those 112 who need to run binaries from that era. 113 114 Most people should answer N here. If you think you may have 115 occasional use for this format, enable module support above 116 and answer M here to compile this support as a module called 117 binfmt_aout. 118 119 If any crucial components of your system (such as /sbin/init 120 or /lib/ld.so) are still in a.out format, you will have to 121 say Y here. 122 123config OSF4_COMPAT 124 bool "OSF/1 v4 readv/writev compatibility" 125 depends on ALPHA && BINFMT_AOUT 126 help 127 Say Y if you are using OSF/1 binaries (like Netscape and Acrobat) 128 with v4 shared libraries freely available from Compaq. If you're 129 going to use shared libraries from Tru64 version 5.0 or later, say N. 130 131config BINFMT_EM86 132 tristate "Kernel support for Linux/Intel ELF binaries" 133 depends on ALPHA 134 ---help--- 135 Say Y here if you want to be able to execute Linux/Intel ELF 136 binaries just like native Alpha binaries on your Alpha machine. For 137 this to work, you need to have the emulator /usr/bin/em86 in place. 138 139 You can get the same functionality by saying N here and saying Y to 140 "Kernel support for MISC binaries". 141 142 You may answer M to compile the emulation support as a module and 143 later load the module when you want to use a Linux/Intel binary. The 144 module will be called binfmt_em86. If unsure, say Y. 145 146config BINFMT_SOM 147 tristate "Kernel support for SOM binaries" 148 depends on PARISC && HPUX 149 help 150 SOM is a binary executable format inherited from HP/UX. Say 151 Y here to be able to load and execute SOM binaries directly. 152 153config BINFMT_MISC 154 tristate "Kernel support for MISC binaries" 155 ---help--- 156 If you say Y here, it will be possible to plug wrapper-driven binary 157 formats into the kernel. You will like this especially when you use 158 programs that need an interpreter to run like Java, Python, .NET or 159 Emacs-Lisp. It's also useful if you often run DOS executables under 160 the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from 161 <http://www.tldp.org/docs.html#howto>). Once you have 162 registered such a binary class with the kernel, you can start one of 163 those programs simply by typing in its name at a shell prompt; Linux 164 will automatically feed it to the correct interpreter. 165 166 You can do other nice things, too. Read the file 167 <file:Documentation/binfmt_misc.txt> to learn how to use this 168 feature, <file:Documentation/java.txt> for information about how 169 to include Java support. and <file:Documentation/mono.txt> for 170 information about how to include Mono-based .NET support. 171 172 To use binfmt_misc, you will need to mount it: 173 mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc 174 175 You may say M here for module support and later load the module when 176 you have use for it; the module is called binfmt_misc. If you 177 don't know what to answer at this point, say Y. 178 179config COREDUMP 180 bool "Enable core dump support" if EXPERT 181 default y 182 help 183 This option enables support for performing core dumps. You almost 184 certainly want to say Y here. Not necessary on systems that never 185 need debugging or only ever run flawless code. 186