Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*  Kernel module help for i386.

    Copyright (C) 2001 Rusty Russell.

    This program 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.

    This program 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 this program; if not, write to the Free Software

    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#include <linux/moduleloader.h>

#include <linux/elf.h>

#include <linux/vmalloc.h>

#include <linux/fs.h>

#include <linux/string.h>

#include <linux/kernel.h>

#if 0

#define DEBUGP printk

#else

#define DEBUGP(fmt , ...)

#endif

void *module_alloc(unsigned long size)

{

        if (size == 0)

                return NULL;

        return vmalloc(size);

}

/* Free memory returned from module_alloc */

void module_free(struct module *mod, void *module_region)

{

        vfree(module_region);

        /* FIXME: If module_region == mod->init_region, trim exception

           table entries. */

}

/* We don't need anything special. */

int module_frob_arch_sections(Elf_Ehdr *hdr,

                              Elf_Shdr *sechdrs,

                              char *secstrings,

                              struct module *mod)

{

        return 0;

}

int apply_relocate(Elf32_Shdr *sechdrs,

                   const char *strtab,

                   unsigned int symindex,

                   unsigned int relsec,

                   struct module *me)

{

        unsigned int i;

        Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr;

        Elf32_Sym *sym;

        uint32_t *location;

        DEBUGP("Applying relocate section %u to %u\n", relsec,

               sechdrs[relsec].sh_info);

        for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {

                /* This is where to make the change */

                location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_offset

                        + rel[i].r_offset;

                /* This is the symbol it is referring to.  Note that all

                   undefined symbols have been resolved.  */

                sym = (Elf32_Sym *)sechdrs[symindex].sh_addr

                        + ELF32_R_SYM(rel[i].r_info);

                /* TODO: This is probably not correct */

                printk("Beware: untested code in module.c!\n");

                /* We add the value into the location given */

                *location += sym->st_value;

        }

        return 0;

}

int apply_relocate_add(Elf32_Shdr *sechdrs,

                       const char *strtab,

                       unsigned int symindex,

                       unsigned int relsec,

                       struct module *me)

{

        printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n",

               me->name);

        return -ENOEXEC;

}

int module_finalize(const Elf_Ehdr *hdr,

                    const Elf_Shdr *sechdrs,

                    struct module *me)

{

        return 0;

}

void module_arch_cleanup(struct module *mod)

{

}