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12#include <linux/module.h>
13#include <linux/moduleloader.h>
14#include <linux/kernel.h>
15#include <linux/mm.h>
16#include <linux/elf.h>
17#include <linux/vmalloc.h>
18#include <linux/fs.h>
19#include <linux/string.h>
20#include <linux/gfp.h>
21
22#include <asm/pgtable.h>
23#include <asm/sections.h>
24
25void *module_alloc(unsigned long size)
26{
27 struct vm_struct *area;
28
29 size = PAGE_ALIGN(size);
30 if (!size)
31 return NULL;
32
33 area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
34 if (!area)
35 return NULL;
36
37 return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC);
38}
39
40void module_free(struct module *module, void *region)
41{
42 vfree(region);
43}
44
45int module_frob_arch_sections(Elf_Ehdr *hdr,
46 Elf_Shdr *sechdrs,
47 char *secstrings,
48 struct module *mod)
49{
50 return 0;
51}
52
53int
54apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
55 unsigned int relindex, struct module *module)
56{
57 Elf32_Shdr *symsec = sechdrs + symindex;
58 Elf32_Shdr *relsec = sechdrs + relindex;
59 Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
60 Elf32_Rel *rel = (void *)relsec->sh_addr;
61 unsigned int i;
62
63 for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
64 unsigned long loc;
65 Elf32_Sym *sym;
66 s32 offset;
67
68 offset = ELF32_R_SYM(rel->r_info);
69 if (offset < 0 || offset >
70 (symsec->sh_size / sizeof(Elf32_Sym))) {
71 printk(KERN_ERR "%s: bad relocation, "
72 "section %d reloc %d\n",
73 module->name, relindex, i);
74 return -ENOEXEC;
75 }
76
77 sym = ((Elf32_Sym *)symsec->sh_addr) + offset;
78
79 if (rel->r_offset < 0 || rel->r_offset >
80 dstsec->sh_size - sizeof(u32)) {
81 printk(KERN_ERR "%s: out of bounds relocation, "
82 "section %d reloc %d offset %d size %d\n",
83 module->name, relindex, i, rel->r_offset,
84 dstsec->sh_size);
85 return -ENOEXEC;
86 }
87
88 loc = dstsec->sh_addr + rel->r_offset;
89
90 switch (ELF32_R_TYPE(rel->r_info)) {
91 case R_UNICORE_NONE:
92
93 break;
94
95 case R_UNICORE_ABS32:
96 *(u32 *)loc += sym->st_value;
97 break;
98
99 case R_UNICORE_PC24:
100 case R_UNICORE_CALL:
101 case R_UNICORE_JUMP24:
102 offset = (*(u32 *)loc & 0x00ffffff) << 2;
103 if (offset & 0x02000000)
104 offset -= 0x04000000;
105
106 offset += sym->st_value - loc;
107 if (offset & 3 ||
108 offset <= (s32)0xfe000000 ||
109 offset >= (s32)0x02000000) {
110 printk(KERN_ERR
111 "%s: relocation out of range, section "
112 "%d reloc %d sym '%s'\n", module->name,
113 relindex, i, strtab + sym->st_name);
114 return -ENOEXEC;
115 }
116
117 offset >>= 2;
118
119 *(u32 *)loc &= 0xff000000;
120 *(u32 *)loc |= offset & 0x00ffffff;
121 break;
122
123 default:
124 printk(KERN_ERR "%s: unknown relocation: %u\n",
125 module->name, ELF32_R_TYPE(rel->r_info));
126 return -ENOEXEC;
127 }
128 }
129 return 0;
130}
131
132int
133apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
134 unsigned int symindex, unsigned int relsec,
135 struct module *module)
136{
137 printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n",
138 module->name);
139 return -ENOEXEC;
140}
141
142int
143module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
144 struct module *module)
145{
146 return 0;
147}
148
149void
150module_arch_cleanup(struct module *mod)
151{
152}
153
