Module I-7410 Advanced Linux Kernel Data Structures

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Berne University of Applied Sciences School of Information Technology HTI Course: Advanced Linux FS-2012 Example: Module Representation in the Kernel (1) A module is represented by a struct module struct module { enum module_state state; /*LIVE,COMING,GOING*/ struct list_head list; /*member list,head:modules*/ char name[MODULE_NAME_LEN]; /* unique module name */ ... const struct kernel_symbol *syms; /*exported symbols*/ unsigned int num_syms; const unsigned long *crcs; /*check sums on names*/ /* GPLonly exported symbols. */ const struct kernel_symbol *gpl_syms; unsigned int num_gpl_syms; const unsigned long *gpl_crcs; unsigned int num_exentries; /* Exception table */ const struct exception_table_entry *extable; Introduction to Modules V1.5 © 2012 by franz.meyer@bfh.ch Slide-12
} Introduction to Modules Berne University of Applied Sciences School of Information Technology HTI Course: Advanced Linux FS-2012 Example: Module Representation in the Kernel (2) struct module, cont int (*init)(void); /*Startup function*/ void *module_init; /*If nonNULL,returned after init*/ void *module_core; /*actual code + data*/ unsigned long init_size, core_size; unsigned long init_text_size, core_text_size; struct mod_arch_specific arch; int unsafe; /* Am I unsafe to unload? */ int license_gplok; /* Am I GPLcompatible */ ... struct list_head source_list; /*what depends on me*/ struct list_head target_list; /*what do I depend on*/ struct task_struct *waiter; /* Who is waiting for us*/ void (*exit)(void); /*Destruction function. */ char *args; /*command line args */ V1.5 © 2012 by franz.meyer@bfh.ch Slide-13
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Module I-7410 Advanced Linux Kernel Data Structures

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