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1da177e4 LT |
1 | config BINFMT_ELF |
2 | bool "Kernel support for ELF binaries" | |
2919b510 | 3 | depends on MMU && (BROKEN || !FRV) |
1da177e4 LT |
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 | ||
b9d36d5d RM |
26 | config COMPAT_BINFMT_ELF |
27 | bool | |
4cea5ceb | 28 | depends on COMPAT && BINFMT_ELF |
b9d36d5d | 29 | |
e39f5602 DD |
30 | config ARCH_BINFMT_ELF_RANDOMIZE_PIE |
31 | bool | |
32 | ||
774c105e PB |
33 | config ARCH_BINFMT_ELF_STATE |
34 | bool | |
35 | ||
1da177e4 LT |
36 | config BINFMT_ELF_FDPIC |
37 | bool "Kernel support for FDPIC ELF binaries" | |
38 | default y | |
fce24476 | 39 | depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X) |
1da177e4 LT |
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 | ||
656eb2cd RM |
49 | config CORE_DUMP_DEFAULT_ELF_HEADERS |
50 | bool "Write ELF core dumps with partial segments" | |
89502155 | 51 | default y |
2d96d105 | 52 | depends on BINFMT_ELF && ELF_CORE |
656eb2cd RM |
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 | |
89502155 | 69 | seen at boot time. If unsure, say Y. |
656eb2cd | 70 | |
2535e0d7 JT |
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 | ||
1da177e4 | 85 | config BINFMT_FLAT |
3202e181 | 86 | bool "Kernel support for flat binaries" |
b8c141e8 | 87 | depends on !MMU && (!FRV || BROKEN) |
1da177e4 LT |
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 | ||
e17c6d56 DW |
104 | config HAVE_AOUT |
105 | def_bool n | |
106 | ||
1da177e4 LT |
107 | config BINFMT_AOUT |
108 | tristate "Kernel support for a.out and ECOFF binaries" | |
e17c6d56 | 109 | depends on HAVE_AOUT |
1da177e4 LT |
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 | ||
1da177e4 LT |
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. | |
046d662f AK |
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. |