release/src-rt-6.x.4708/linux/linux-2.6.36/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 #define DEBUGP(fmt...)
   9
  10 void *module_alloc(unsigned long size)
  11 {
  12         if (size == 0)
  13                 return NULL;
  14         return vmalloc(size);
  15 }
  16
  17
  18 /* Free memory returned from module_alloc */
  19 void module_free(struct module *mod, void *module_region)
  20 {
  21         vfree(module_region);
  22 }
  23
  24 /* We don't need anything special. */
  25 int module_frob_arch_sections(Elf_Ehdr *hdr,
  26                               Elf_Shdr *sechdrs,
  27                               char *secstrings,
  28                               struct module *mod)
  29 {
  30         return 0;
  31 }
  32
  33 int apply_relocate(Elf32_Shdr *sechdrs,
  34                    const char *strtab,
  35                    unsigned int symindex,
  36                    unsigned int relsec,
  37                    struct module *me)
  38 {
  39         unsigned int i;
  40         Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr;
  41         Elf32_Sym *sym;
  42         uint32_t *location;
  43
  44         DEBUGP("Applying relocate section %u to %u\n", relsec,
  45                sechdrs[relsec].sh_info);
  46         for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
  47                 /* This is where to make the change */
  48                 location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
  49                         + rel[i].r_offset;
  50                 /* This is the symbol it is referring to.  Note that all
  51                    undefined symbols have been resolved.  */
  52                 sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
  53                         + ELF32_R_SYM(rel[i].r_info);
  54
  55                 switch (ELF32_R_TYPE(rel[i].r_info)) {
  56                 case R_68K_32:
  57                         /* We add the value into the location given */
  58                         *location += sym->st_value;
  59                         break;
  60                 case R_68K_PC32:
  61                         /* Add the value, subtract its postition */
  62                         *location += sym->st_value - (uint32_t)location;
  63                         break;
  64                 default:
  65                         printk(KERN_ERR "module %s: Unknown relocation: %u\n",
  66                                me->name, ELF32_R_TYPE(rel[i].r_info));
  67                         return -ENOEXEC;
  68                 }
  69         }
  70         return 0;
  71 }
  72
  73 int apply_relocate_add(Elf32_Shdr *sechdrs,
  74                        const char *strtab,
  75                        unsigned int symindex,
  76                        unsigned int relsec,
  77                        struct module *me)
  78 {
  79         unsigned int i;
  80         Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
  81         Elf32_Sym *sym;
  82         uint32_t *location;
  83
  84         DEBUGP("Applying relocate_add section %u to %u\n", relsec,
  85                sechdrs[relsec].sh_info);
  86         for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
  87                 /* This is where to make the change */
  88                 location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
  89                         + rel[i].r_offset;
  90                 /* This is the symbol it is referring to.  Note that all
  91                    undefined symbols have been resolved.  */
  92                 sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
  93                         + ELF32_R_SYM(rel[i].r_info);
  94
  95                 switch (ELF32_R_TYPE(rel[i].r_info)) {
  96                 case R_68K_32:
  97                         /* We add the value into the location given */
  98                         *location = rel[i].r_addend + sym->st_value;
  99                         break;
 100                 case R_68K_PC32:
 101                         /* Add the value, subtract its postition */
 102                         *location = rel[i].r_addend + sym->st_value - (uint32_t)location;
 103                         break;
 104                 default:
 105                         printk(KERN_ERR "module %s: Unknown relocation: %u\n",
 106                                me->name, ELF32_R_TYPE(rel[i].r_info));
 107                         return -ENOEXEC;
 108                 }
 109         }
 110         return 0;
 111 }
 112
 113 int module_finalize(const Elf_Ehdr *hdr,
 114                     const Elf_Shdr *sechdrs,
 115                     struct module *me)
 116 {
 117         return 0;
 118 }
 119
 120 void module_arch_cleanup(struct module *mod)
 121 {
 122 }