Created the basic module infrastructure.

1 files changed, 58 insertions, 0 deletions

diff --git a/elf/elf_module.h b/elf/elf_module.h
new file mode 100644
index 00000000..fd0e15c5
--- /dev/null
+++ b/elf/elf_module.h
@@ -0,0 +1,58 @@
+#ifndef ELF_MODULE_H_
+#define ELF_MODULE_H_
+
+#include <elf.h>
+#include <stdint.h>
+#include "linux_list.h"
+
+#define MODULE_NAME_SIZE		64
+
+#define MODULE_ELF_CLASS		ELFCLASS32
+#define MODULE_ELF_DATA			ELFDATA2LSB
+#define MODULE_ELF_VERSION		EV_CURRENT
+
+
+typedef int (*module_init_func)();
+typedef void (*module_exit_func)();
+
+// Structure encapsulating a module loaded in memory
+struct elf_module {
+	char				name[MODULE_NAME_SIZE]; 		// The module name
+	
+	struct list_head	deps;		// Head of module dependency list
+	struct list_head	list;		// The list entry in the module list
+	
+	module_init_func	init_func;	// The initialization entry point
+	module_exit_func	exit_func;	// The module finalization code
+	
+	void				*file_image; // The image of the module file in memory
+	uint32_t			file_size; // The size of the module file
+	
+	// Information for modules loaded in user space
+#ifdef ELF_USERSPACE_TEST
+	int					file_fd;	// The file descriptor of the open file
+#endif
+};
+
+// Structure encapsulating a module dependency need
+struct module_dep {
+	struct list_head	list;		// The list entry in the dependency list
+	
+	char				name[MODULE_NAME_SIZE];		// The name of the module
+};
+
+// Initialization of the module subsystem
+extern int modules_init();
+// Termination of the module subsystem
+extern void modules_term();
+
+// Allocates the structure for a new module
+extern struct elf_module *module_alloc(const char *name);
+
+// Loads the module into the system
+extern int module_load(struct elf_module *module);
+
+// Unloads the module from the system and releases all the associated memory
+extern int module_unload(struct elf_module *module);
+
+#endif /*ELF_MODULE_H_*/