1 config BINFMT_ELF 2 bool "Kernel support for ELF binaries" 3 depends on MMU && (BROKEN || !FRV) 4 select ELFCORE 5 default y 6 ---help--- 7 ELF (Executable and Linkable Format) is a format for libraries and 8 executables used across different architectures and operating 9 systems. Saying Y here will enable your kernel to run ELF binaries 10 and enlarge it by about 13 KB. ELF support under Linux has now all 11 but replaced the traditional Linux a.out formats (QMAGIC and ZMAGIC) 12 because it is portable (this does *not* mean that you will be able 13 to run executables from different architectures or operating systems 14 however) and makes building run-time libraries very easy. Many new 15 executables are distributed solely in ELF format. You definitely 16 want to say Y here. 17 18 Information about ELF is contained in the ELF HOWTO available from 19 <http://www.tldp.org/docs.html#howto>. 20 21 If you find that after upgrading from Linux kernel 1.2 and saying Y 22 here, you still can't run any ELF binaries (they just crash), then 23 you'll have to install the newest ELF runtime libraries, including 24 ld.so (check the file <file:Documentation/Changes> for location and 25 latest version). 26 27 config COMPAT_BINFMT_ELF 28 bool 29 depends on COMPAT && BINFMT_ELF 30 select ELFCORE 31 32 config ARCH_BINFMT_ELF_STATE 33 bool 34 35 config BINFMT_ELF_FDPIC 36 bool "Kernel support for FDPIC ELF binaries" 37 default y 38 depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X) 39 select ELFCORE 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 ELFCORE 50 bool 51 help 52 This option enables kernel/elfcore.o. 53 54 config CORE_DUMP_DEFAULT_ELF_HEADERS 55 bool "Write ELF core dumps with partial segments" 56 default y 57 depends on BINFMT_ELF && ELF_CORE 58 help 59 ELF core dump files describe each memory mapping of the crashed 60 process, and can contain or omit the memory contents of each one. 61 The contents of an unmodified text mapping are omitted by default. 62 63 For an unmodified text mapping of an ELF object, including just 64 the first page of the file in a core dump makes it possible to 65 identify the build ID bits in the file, without paying the i/o 66 cost and disk space to dump all the text. However, versions of 67 GDB before 6.7 are confused by ELF core dump files in this format. 68 69 The core dump behavior can be controlled per process using 70 the /proc/PID/coredump_filter pseudo-file; this setting is 71 inherited. See Documentation/filesystems/proc.txt for details. 72 73 This config option changes the default setting of coredump_filter 74 seen at boot time. If unsure, say Y. 75 76 config BINFMT_SCRIPT 77 tristate "Kernel support for scripts starting with #!" 78 default y 79 help 80 Say Y here if you want to execute interpreted scripts starting with 81 #! followed by the path to an interpreter. 82 83 You can build this support as a module; however, until that module 84 gets loaded, you cannot run scripts. Thus, if you want to load this 85 module from an initramfs, the portion of the initramfs before loading 86 this module must consist of compiled binaries only. 87 88 Most systems will not boot if you say M or N here. If unsure, say Y. 89 90 config BINFMT_FLAT 91 bool "Kernel support for flat binaries" 92 depends on !MMU || ARM || M68K 93 depends on !FRV || BROKEN 94 help 95 Support uClinux FLAT format binaries. 96 97 config BINFMT_ZFLAT 98 bool "Enable ZFLAT support" 99 depends on BINFMT_FLAT 100 select ZLIB_INFLATE 101 help 102 Support FLAT format compressed binaries 103 104 config BINFMT_SHARED_FLAT 105 bool "Enable shared FLAT support" 106 depends on BINFMT_FLAT 107 help 108 Support FLAT shared libraries 109 110 config HAVE_AOUT 111 def_bool n 112 113 config BINFMT_AOUT 114 tristate "Kernel support for a.out and ECOFF binaries" 115 depends on HAVE_AOUT 116 ---help--- 117 A.out (Assembler.OUTput) is a set of formats for libraries and 118 executables used in the earliest versions of UNIX. Linux used 119 the a.out formats QMAGIC and ZMAGIC until they were replaced 120 with the ELF format. 121 122 The conversion to ELF started in 1995. This option is primarily 123 provided for historical interest and for the benefit of those 124 who need to run binaries from that era. 125 126 Most people should answer N here. If you think you may have 127 occasional use for this format, enable module support above 128 and answer M here to compile this support as a module called 129 binfmt_aout. 130 131 If any crucial components of your system (such as /sbin/init 132 or /lib/ld.so) are still in a.out format, you will have to 133 say Y here. 134 135 config OSF4_COMPAT 136 bool "OSF/1 v4 readv/writev compatibility" 137 depends on ALPHA && BINFMT_AOUT 138 help 139 Say Y if you are using OSF/1 binaries (like Netscape and Acrobat) 140 with v4 shared libraries freely available from Compaq. If you're 141 going to use shared libraries from Tru64 version 5.0 or later, say N. 142 143 config BINFMT_EM86 144 tristate "Kernel support for Linux/Intel ELF binaries" 145 depends on ALPHA 146 ---help--- 147 Say Y here if you want to be able to execute Linux/Intel ELF 148 binaries just like native Alpha binaries on your Alpha machine. For 149 this to work, you need to have the emulator /usr/bin/em86 in place. 150 151 You can get the same functionality by saying N here and saying Y to 152 "Kernel support for MISC binaries". 153 154 You may answer M to compile the emulation support as a module and 155 later load the module when you want to use a Linux/Intel binary. The 156 module will be called binfmt_em86. If unsure, say Y. 157 158 config BINFMT_MISC 159 tristate "Kernel support for MISC binaries" 160 ---help--- 161 If you say Y here, it will be possible to plug wrapper-driven binary 162 formats into the kernel. You will like this especially when you use 163 programs that need an interpreter to run like Java, Python, .NET or 164 Emacs-Lisp. It's also useful if you often run DOS executables under 165 the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from 166 <http://www.tldp.org/docs.html#howto>). Once you have 167 registered such a binary class with the kernel, you can start one of 168 those programs simply by typing in its name at a shell prompt; Linux 169 will automatically feed it to the correct interpreter. 170 171 You can do other nice things, too. Read the file 172 <file:Documentation/binfmt_misc.txt> to learn how to use this 173 feature, <file:Documentation/admin-guide/java.rst> for information about how 174 to include Java support. and <file:Documentation/admin-guide/mono.rst> for 175 information about how to include Mono-based .NET support. 176 177 To use binfmt_misc, you will need to mount it: 178 mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc 179 180 You may say M here for module support and later load the module when 181 you have use for it; the module is called binfmt_misc. If you 182 don't know what to answer at this point, say Y. 183 184 config COREDUMP 185 bool "Enable core dump support" if EXPERT 186 default y 187 help 188 This option enables support for performing core dumps. You almost 189 certainly want to say Y here. Not necessary on systems that never 190 need debugging or only ever run flawless code.