1 config 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 26 config COMPAT_BINFMT_ELF 27 bool 28 depends on COMPAT && BINFMT_ELF 29 30 config ARCH_BINFMT_ELF_RANDOMIZE_PIE 31 bool 32 33 config BINFMT_ELF_FDPIC 34 bool "Kernel support for FDPIC ELF binaries" 35 default y 36 depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X) 37 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 46 config CORE_DUMP_DEFAULT_ELF_HEADERS 47 bool "Write ELF core dumps with partial segments" 48 default y 49 depends on BINFMT_ELF && ELF_CORE 50 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 66 seen at boot time. If unsure, say Y. 67 68 config 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 82 config BINFMT_FLAT 83 bool "Kernel support for flat binaries" 84 depends on !MMU && (!FRV || BROKEN) 85 help 86 Support uClinux FLAT format binaries. 87 88 config 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 95 config BINFMT_SHARED_FLAT 96 bool "Enable shared FLAT support" 97 depends on BINFMT_FLAT 98 help 99 Support FLAT shared libraries 100 101 config HAVE_AOUT 102 def_bool n 103 104 config BINFMT_AOUT 105 tristate "Kernel support for a.out and ECOFF binaries" 106 depends on HAVE_AOUT 107 ---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. 125 126 config 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. 133 134 config 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. 148 149 config BINFMT_SOM 150 tristate "Kernel support for SOM binaries" 151 depends on PARISC && HPUX 152 help 153 SOM is a binary executable format inherited from HP/UX. Say 154 Y here to be able to load and execute SOM binaries directly. 155 156 config BINFMT_MISC 157 tristate "Kernel support for MISC binaries" 158 ---help--- 159 If you say Y here, it will be possible to plug wrapper-driven binary 160 formats into the kernel. You will like this especially when you use 161 programs that need an interpreter to run like Java, Python, .NET or 162 Emacs-Lisp. It's also useful if you often run DOS executables under 163 the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from 164 <http://www.tldp.org/docs.html#howto>). Once you have 165 registered such a binary class with the kernel, you can start one of 166 those programs simply by typing in its name at a shell prompt; Linux 167 will automatically feed it to the correct interpreter. 168 169 You can do other nice things, too. Read the file 170 <file:Documentation/binfmt_misc.txt> to learn how to use this 171 feature, <file:Documentation/java.txt> for information about how 172 to include Java support. and <file:Documentation/mono.txt> for 173 information about how to include Mono-based .NET support. 174 175 To use binfmt_misc, you will need to mount it: 176 mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc 177 178 You may say M here for module support and later load the module when 179 you have use for it; the module is called binfmt_misc. If you 180 don't know what to answer at this point, say Y. 181 182 config COREDUMP 183 bool "Enable core dump support" if EXPERT 184 default y 185 help 186 This option enables support for performing core dumps. You almost 187 certainly want to say Y here. Not necessary on systems that never 188 need debugging or only ever run flawless code.