Lines Matching full:module
5 This document describes how to build an out-of-tree kernel module.
15 === 3. Creating a Kbuild File for an External Module
24 === 5. Module Installation
27 === 6. Module Versioning
30 --- 6.3 Symbols From Another External Module
48 external module should supply a makefile that hides most of the
49 complexity, so one only has to type "make" to build the module. This is
68 NOTE: "modules_prepare" will not build Module.symvers even if
70 executed to make module versioning work.
75 The command to build an external module is::
79 The kbuild system knows that an external module is being built
86 Then to install the module(s) just built, add the target
104 Informs kbuild that an external module is being built.
106 directory where the external module (kbuild file) is
112 When building an external module, only a subset of the "make"
117 The default will build the module(s) located in the current
130 Install the external module(s). The default location is
135 Remove all generated files in the module directory only.
143 It is possible to build single files that are part of a module.
144 This works equally well for the kernel, a module, and even for
147 Example (The module foo.ko, consist of bar.o and baz.o)::
155 3. Creating a Kbuild File for an External Module
158 In the last section we saw the command to build a module for the
159 running kernel. The module is not actually built, however, because a
161 the module(s) being built, along with the list of requisite source
167 and, after linking, will result in the kernel module <module_name>.ko.
169 When the module is built from multiple sources, an additional line is
178 module 8123.ko, which is built from the following files::
187 An external module always includes a wrapper makefile that
188 supports building the module using "make" with no arguments.
209 # Module specific targets
243 # Module specific targets
272 # Module specific targets
291 the assignment to the module.
294 build the kernel module 8123.ko; it has been included as
301 when creating the object file for the module.
324 module, then the file is placed in the same directory as the
342 #include <linux/module.h>
385 To build the module complex.ko, we then need the following
409 5. Module Installation
450 6. Module Versioning
453 Module versioning is enabled by the CONFIG_MODVERSIONS tag, and is used
455 for an exported symbol is created. When a module is loaded/used, the
457 the module; if they are not equal, the kernel refuses to load the
458 module.
460 Module.symvers contains a list of all exported symbols from a kernel
466 During a kernel build, a file named Module.symvers will be
467 generated. Module.symvers contains all exported symbols from
471 The syntax of the Module.symvers file is::
473 <CRC> <Symbol> <Namespace> <Module> <Export Type>
483 Module.symvers serves two purposes:
491 When building an external module, the build system needs access
494 the symbols by reading Module.symvers from the kernel source
495 tree. If a Module.symvers file is present in the directory
496 where the external module is being built, this file will be
497 read too. During the MODPOST step, a new Module.symvers file
501 6.3 Symbols From Another External Module
504 Sometimes, an external module uses exported symbols from
505 another external module. Kbuild needs to have full knowledge of
532 full knowledge of symbols from either module.
534 Use an extra Module.symvers file
535 When an external module is built, a Module.symvers file
538 from bar.ko, copy the Module.symvers file from the
540 built. During the module build, kbuild will read the
541 Module.symvers file in the directory of the external
542 module, and when the build is finished, a new
543 Module.symvers file is created containing the sum of
547 If it is impractical to copy Module.symvers from
548 another module, you can assign a space separated list
561 decide if a specific feature is included in the module. In