Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/* Kernel module help for sparc32.

 *

 * Copyright (C) 2001 Rusty Russell.

 * Copyright (C) 2002 David S. Miller.

 */

#include <linux/moduleloader.h>

#include <linux/kernel.h>

#include <linux/elf.h>

#include <linux/vmalloc.h>

#include <linux/fs.h>

#include <linux/string.h>

#include <linux/ctype.h>

void *module_alloc(unsigned long size)

{

        void *ret;

        /* We handle the zero case fine, unlike vmalloc */

        if (size == 0)

                return NULL;

        ret = vmalloc(size);

        if (!ret)

                ret = ERR_PTR(-ENOMEM);

        else

                memset(ret, 0, size);

        return ret;

}

/* Free memory returned from module_core_alloc/module_init_alloc */

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

{

        vfree(module_region);

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

           table entries. */

}

/* Make generic code ignore STT_REGISTER dummy undefined symbols,

 * and replace references to .func with _Func

 */

int module_frob_arch_sections(Elf_Ehdr *hdr,

                              Elf_Shdr *sechdrs,

                              char *secstrings,

                              struct module *mod)

{

        unsigned int symidx;

        Elf32_Sym *sym;

        char *strtab;

        int i;

        for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {

                if (symidx == hdr->e_shnum-1) {

                        printk("%s: no symtab found.\n", mod->name);

                        return -ENOEXEC;

                }

        }

        sym = (Elf32_Sym *)sechdrs[symidx].sh_addr;

        strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;

        for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {

                if (sym[i].st_shndx == SHN_UNDEF) {

                        if (ELF32_ST_TYPE(sym[i].st_info) == STT_REGISTER)

                                sym[i].st_shndx = SHN_ABS;

                        else {

                                char *name = strtab + sym[i].st_name;

                                if (name[0] == '.') {

                                        name[0] = '_';

                                        name[1] = toupper(name[1]);

                                }

                        }

                }

        }

        return 0;

}

int apply_relocate(Elf32_Shdr *sechdrs,

                   const char *strtab,

                   unsigned int symindex,

                   unsigned int relsec,

                   struct module *me)

{

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

               me->name);

        return -ENOEXEC;

}

int apply_relocate_add(Elf32_Shdr *sechdrs,

                       const char *strtab,

                       unsigned int symindex,

                       unsigned int relsec,

                       struct module *me)

{

        unsigned int i;

        Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;

        Elf32_Sym *sym;

        u8 *location;

        u32 *loc32;

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

                Elf32_Addr v;

                /* This is where to make the change */

                location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr

                        + rel[i].r_offset;

                loc32 = (u32 *) location;

                /* 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);

                v = sym->st_value + rel[i].r_addend;

                switch (ELF32_R_TYPE(rel[i].r_info)) {

                case R_SPARC_32:

                case R_SPARC_UA32:

                        location[0] = v >> 24;

                        location[1] = v >> 16;

                        location[2] = v >>  8;

                        location[3] = v >>  0;

                        break;

                case R_SPARC_WDISP30:

                        v -= (Elf32_Addr) location;

                        *loc32 = (*loc32 & ~0x3fffffff) |

                                ((v >> 2) & 0x3fffffff);

                        break;

                case R_SPARC_WDISP22:

                        v -= (Elf32_Addr) location;

                        *loc32 = (*loc32 & ~0x3fffff) |

                                ((v >> 2) & 0x3fffff);

                        break;

                case R_SPARC_LO10:

                        *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);

                        break;

                case R_SPARC_HI22:

                        *loc32 = (*loc32 & ~0x3fffff) |

                                ((v >> 10) & 0x3fffff);

                        break;

                default:

                        printk(KERN_ERR "module %s: Unknown relocation: %x\n",

                               me->name,

                               (int) (ELF32_R_TYPE(rel[i].r_info) & 0xff));

                        return -ENOEXEC;

                };

        }

        return 0;

}

int module_finalize(const Elf_Ehdr *hdr,

                    const Elf_Shdr *sechdrs,

                    struct module *me)

{

        return 0;

}

void module_arch_cleanup(struct module *mod)

{

}