LXR linux/arch/m68knommu/kernel/module.c

   1#include <linux/moduleloader.h>
   2#include <linux/elf.h>
   3#include <linux/vmalloc.h>
   4#include <linux/fs.h>
   5#include <linux/string.h>
   6#include <linux/kernel.h>
   7
   8#if 0
   9#define DEBUGP printk
  10#else
  11#define DEBUGP(fmt...)
  12#endif
  13
  14void *module_alloc(unsigned long size)
  15{
  16        if (size == 0)
  17                return NULL;
  18        return vmalloc(size);
  19}
  20
  21
  22/* Free memory returned from module_alloc */
  23void module_free(struct module *mod, void *module_region)
  24{
  25        vfree(module_region);
  26}
  27
  28/* We don't need anything special. */
  29int module_frob_arch_sections(Elf_Ehdr *hdr,
  30                              Elf_Shdr *sechdrs,
  31                              char *secstrings,
  32                              struct module *mod)
  33{
  34        return 0;
  35}
  36
  37int apply_relocate(Elf32_Shdr *sechdrs,
  38                   const char *strtab,
  39                   unsigned int symindex,
  40                   unsigned int relsec,
  41                   struct module *me)
  42{
  43        unsigned int i;
  44        Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr;
  45        Elf32_Sym *sym;
  46        uint32_t *location;
  47
  48        DEBUGP("Applying relocate section %u to %u\n", relsec,
  49               sechdrs[relsec].sh_info);
  50        for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
  51                /* This is where to make the change */
  52                location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
  53                        + rel[i].r_offset;
  54                /* This is the symbol it is referring to.  Note that all
  55                   undefined symbols have been resolved.  */
  56                sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
  57                        + ELF32_R_SYM(rel[i].r_info);
  58
  59                switch (ELF32_R_TYPE(rel[i].r_info)) {
  60                case R_68K_32:
  61                        /* We add the value into the location given */
  62                        *location += sym->st_value;
  63                        break;
  64                case R_68K_PC32:
  65                        /* Add the value, subtract its postition */
  66                        *location += sym->st_value - (uint32_t)location;
  67                        break;
  68                default:
  69                        printk(KERN_ERR "module %s: Unknown relocation: %u\n",
  70                               me->name, ELF32_R_TYPE(rel[i].r_info));
  71                        return -ENOEXEC;
  72                }
  73        }
  74        return 0;
  75}
  76
  77int apply_relocate_add(Elf32_Shdr *sechdrs,
  78                       const char *strtab,
  79                       unsigned int symindex,
  80                       unsigned int relsec,
  81                       struct module *me)
  82{
  83        unsigned int i;
  84        Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
  85        Elf32_Sym *sym;
  86        uint32_t *location;
  87
  88        DEBUGP("Applying relocate_add section %u to %u\n", relsec,
  89               sechdrs[relsec].sh_info);
  90        for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
  91                /* This is where to make the change */
  92                location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
  93                        + rel[i].r_offset;
  94                /* This is the symbol it is referring to.  Note that all
  95                   undefined symbols have been resolved.  */
  96                sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
  97                        + ELF32_R_SYM(rel[i].r_info);
  98
  99                switch (ELF32_R_TYPE(rel[i].r_info)) {
 100                case R_68K_32:
 101                        /* We add the value into the location given */
 102                        *location = rel[i].r_addend + sym->st_value;
 103                        break;
 104                case R_68K_PC32:
 105                        /* Add the value, subtract its postition */
 106                        *location = rel[i].r_addend + sym->st_value - (uint32_t)location;
 107                        break;
 108                default:
 109                        printk(KERN_ERR "module %s: Unknown relocation: %u\n",
 110                               me->name, ELF32_R_TYPE(rel[i].r_info));
 111                        return -ENOEXEC;
 112                }
 113        }
 114        return 0;
 115}
 116
 117int module_finalize(const Elf_Ehdr *hdr,
 118                    const Elf_Shdr *sechdrs,
 119                    struct module *me)
 120{
 121        return 0;
 122}
 123
 124void module_arch_cleanup(struct module *mod)
 125{
 126}
 127