root/Whitix/trunk/include/module.h

/*  This file is part of Whitix.
 *
 *  Whitix is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Whitix is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Whitix; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef MODULE_H
#define MODULE_H

#define ModuleInit(func) \
        int _ModuleInit(void) __attribute__((alias(#func)));

#define MODULE_START    0xD8000000
#define MODULE_END              0xE0000000

#include <elf.h>
#include <llist.h>
#include <typedefs.h>
#include <keobject.h>

struct KernelSymbol;

struct Module
{
        struct ListHead next;

        struct KernelSymbol* keSymTab;
        int keSymTabSize;

        /* ELF specific information. */
        DWORD loadAddr;
        DWORD textAddr;
        DWORD textLength;

        struct ElfSectionHeader* sectionHeaders;

        char* strTable;
        int strTableSize;

        struct ElfSymbol* symTable;
        int symTableSize;
        
        struct KeObject object;
};

static inline struct KeFsEntry* ModuleGetIcDir(struct Module* module)
{
        return module->object.dir;
}

#ifndef MODULE /* Kernel-specific structures. */

void ModuleSymbolPrint(DWORD address);
int ModuleAdd(char* name, void* file, void* image, unsigned long length, int flags);

#endif

struct KernelSymbol
{
        unsigned long addr;
        const char* name;
};

/* So drivers and stacks can access kernel functions, either through a trampoline
 * or directly. */

#define SYMBOL_EXPORT(sym) \
        static const char _KeStrTab_##sym[] \
        __attribute__((section(".symstrings"))) __attribute__((__used__)) \
        = #sym; \
        static const struct KernelSymbol _KeSymTab_##sym \
        __attribute__((section(".symtable"))) __attribute__((__used__)) \
        = { (unsigned long)&sym, _KeStrTab_##sym }
        
#ifdef MODULE

/* Save us calling MemAlloc to allocate a Module structure by embedding each
 * Module structure in the module itself. */
 
static struct Module thisModule __attribute__((section(".gnu.linkonce.thisModule"))) __attribute__((used));

/* Defined for ease of reference. */
#define THIS_MODULE &thisModule
#endif

#endif