doc: module: update file references

Inter Module support

--------------------

Refer to the file kernel/module.c for more information.

Refer to the files in kernel/module/ for more information.

Hardware Interfaces

===================

The corresponding ksymtab entry struct ``kernel_symbol`` will have the member

``namespace`` set accordingly. A symbol that is exported without a namespace will

refer to ``NULL``. There is no default namespace if none is defined. ``modpost``

and kernel/module.c make use the namespace at build time or module load time,

respectively.

and kernel/module/main.c make use the namespace at build time or module load

time, respectively.

2.2 Using the DEFAULT_SYMBOL_NAMESPACE define

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Normally, a stripped down copy of a module's symbol table (containing only

"core" symbols) is made available through module->symtab (See layout_symtab()

in kernel/module.c). For livepatch modules, the symbol table copied into memory

on module load must be exactly the same as the symbol table produced when the

patch module was compiled. This is because the relocations in each livepatch

relocation section refer to their respective symbols with their symbol indices,

and the original symbol indices (and thus the symtab ordering) must be

in kernel/module/kallsyms.c). For livepatch modules, the symbol table copied

into memory on module load must be exactly the same as the symbol table produced

when the patch module was compiled. This is because the relocations in each

livepatch relocation section refer to their respective symbols with their symbol

indices, and the original symbol indices (and thus the symtab ordering) must be

preserved in order for apply_relocate_add() to find the right symbol.

For example, take this particular rela from a livepatch module:::

rappresentata dalla struttura ``kernel_symbol`` che avrà il campo

``namespace`` (spazio dei nomi) impostato. Un simbolo esportato senza uno spazio

dei nomi avrà questo campo impostato a ``NULL``. Non esiste uno spazio dei nomi

di base. Il programma ``modpost`` e il codice in kernel/module.c usano lo spazio

dei nomi, rispettivamente, durante la compilazione e durante il caricamento

di un modulo.

di base. Il programma ``modpost`` e il codice in kernel/module/main.c usano lo

spazio dei nomi, rispettivamente, durante la compilazione e durante il

caricamento di un modulo.

2.2 Usare il simbolo di preprocessore DEFAULT_SYMBOL_NAMESPACE

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模块接口支持

------------

更多信息请参考文件kernel/module.c。

更多信息请参阅kernel/module/目录下的文件。

硬件接口

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