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 ARCH_BINFMT_ELF_STATE 34 bool 35 36 config BINFMT_ELF_FDPIC 37 bool "Kernel support for FDPIC ELF binaries" 38 default y 39 depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X) 40 help 41 ELF FDPIC binaries are based on ELF, but allow the individual load 42 segments of a binary to be located in memory independently of each 43 other. This makes this format ideal for use in environments where no 44 MMU is available as it still permits text segments to be shared, 45 even if data segments are not. 46 47 It is also possible to run FDPIC ELF binaries on MMU linux also. 48 49 config CORE_DUMP_DEFAULT_ELF_HEADERS 50 bool "Write ELF core dumps with partial segments" 51 default y 52 depends on BINFMT_ELF && ELF_CORE 53 help 54 ELF core dump files describe each memory mapping of the crashed 55 process, and can contain or omit the memory contents of each one. 56 The contents of an unmodified text mapping are omitted by default. 57 58 For an unmodified text mapping of an ELF object, including just 59 the first page of the file in a core dump makes it possible to 60 identify the build ID bits in the file, without paying the i/o 61 cost and disk space to dump all the text. However, versions of 62 GDB before 6.7 are confused by ELF core dump files in this format. 63 64 The core dump behavior can be controlled per process using 65 the /proc/PID/coredump_filter pseudo-file; this setting is 66 inherited. See Documentation/filesystems/proc.txt for details. 67 68 This config option changes the default setting of coredump_filter 69 seen at boot time. If unsure, say Y. 70 71 config BINFMT_SCRIPT 72 tristate "Kernel support for scripts starting with #!" 73 default y 74 help 75 Say Y here if you want to execute interpreted scripts starting with 76 #! followed by the path to an interpreter. 77 78 You can build this support as a module; however, until that module 79 gets loaded, you cannot run scripts. Thus, if you want to load this 80 module from an initramfs, the portion of the initramfs before loading 81 this module must consist of compiled binaries only. 82 83 Most systems will not boot if you say M or N here. If unsure, say Y. 84 85 config BINFMT_FLAT 86 bool "Kernel support for flat binaries" 87 depends on !MMU && (!FRV || BROKEN) 88 help 89 Support uClinux FLAT format binaries. 90 91 config BINFMT_ZFLAT 92 bool "Enable ZFLAT support" 93 depends on BINFMT_FLAT 94 select ZLIB_INFLATE 95 help 96 Support FLAT format compressed binaries 97 98 config BINFMT_SHARED_FLAT 99 bool "Enable shared FLAT support" 100 depends on BINFMT_FLAT 101 help 102 Support FLAT shared libraries 103 104 config HAVE_AOUT 105 def_bool n 106 107 config BINFMT_AOUT 108 tristate "Kernel support for a.out and ECOFF binaries" 109 depends on HAVE_AOUT 110 ---help--- 111 A.out (Assembler.OUTput) is a set of formats for libraries and 112 executables used in the earliest versions of UNIX. Linux used 113 the a.out formats QMAGIC and ZMAGIC until they were replaced 114 with the ELF format. 115 116 The conversion to ELF started in 1995. This option is primarily 117 provided for historical interest and for the benefit of those 118 who need to run binaries from that era. 119 120 Most people should answer N here. If you think you may have 121 occasional use for this format, enable module support above 122 and answer M here to compile this support as a module called 123 binfmt_aout. 124 125 If any crucial components of your system (such as /sbin/init 126 or /lib/ld.so) are still in a.out format, you will have to 127 say Y here. 128 129 config OSF4_COMPAT 130 bool "OSF/1 v4 readv/writev compatibility" 131 depends on ALPHA && BINFMT_AOUT 132 help 133 Say Y if you are using OSF/1 binaries (like Netscape and Acrobat) 134 with v4 shared libraries freely available from Compaq. If you're 135 going to use shared libraries from Tru64 version 5.0 or later, say N. 136 137 config BINFMT_EM86 138 tristate "Kernel support for Linux/Intel ELF binaries" 139 depends on ALPHA 140 ---help--- 141 Say Y here if you want to be able to execute Linux/Intel ELF 142 binaries just like native Alpha binaries on your Alpha machine. For 143 this to work, you need to have the emulator /usr/bin/em86 in place. 144 145 You can get the same functionality by saying N here and saying Y to 146 "Kernel support for MISC binaries". 147 148 You may answer M to compile the emulation support as a module and 149 later load the module when you want to use a Linux/Intel binary. The 150 module will be called binfmt_em86. If unsure, say Y. 151 152 config BINFMT_MISC 153 tristate "Kernel support for MISC binaries" 154 ---help--- 155 If you say Y here, it will be possible to plug wrapper-driven binary 156 formats into the kernel. You will like this especially when you use 157 programs that need an interpreter to run like Java, Python, .NET or 158 Emacs-Lisp. It's also useful if you often run DOS executables under 159 the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from 160 <http://www.tldp.org/docs.html#howto>). Once you have 161 registered such a binary class with the kernel, you can start one of 162 those programs simply by typing in its name at a shell prompt; Linux 163 will automatically feed it to the correct interpreter. 164 165 You can do other nice things, too. Read the file 166 <file:Documentation/binfmt_misc.txt> to learn how to use this 167 feature, <file:Documentation/java.txt> for information about how 168 to include Java support. and <file:Documentation/mono.txt> for 169 information about how to include Mono-based .NET support. 170 171 To use binfmt_misc, you will need to mount it: 172 mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc 173 174 You may say M here for module support and later load the module when 175 you have use for it; the module is called binfmt_misc. If you 176 don't know what to answer at this point, say Y. 177 178 config COREDUMP 179 bool "Enable core dump support" if EXPERT 180 default y 181 help 182 This option enables support for performing core dumps. You almost 183 certainly want to say Y here. Not necessary on systems that never 184 need debugging or only ever run flawless code.