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-rw-r--r--arch/x86_64/kernel/module_64.c185
1 files changed, 0 insertions, 185 deletions
diff --git a/arch/x86_64/kernel/module_64.c b/arch/x86_64/kernel/module_64.c
deleted file mode 100644
index a888e67f5874..000000000000
--- a/arch/x86_64/kernel/module_64.c
+++ /dev/null
@@ -1,185 +0,0 @@
1/* Kernel module help for x86-64
2 Copyright (C) 2001 Rusty Russell.
3 Copyright (C) 2002,2003 Andi Kleen, SuSE Labs.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18*/
19#include <linux/moduleloader.h>
20#include <linux/elf.h>
21#include <linux/vmalloc.h>
22#include <linux/fs.h>
23#include <linux/string.h>
24#include <linux/kernel.h>
25#include <linux/slab.h>
26#include <linux/bug.h>
27
28#include <asm/system.h>
29#include <asm/page.h>
30#include <asm/pgtable.h>
31
32#define DEBUGP(fmt...)
33
34#ifndef CONFIG_UML
35void module_free(struct module *mod, void *module_region)
36{
37 vfree(module_region);
38 /* FIXME: If module_region == mod->init_region, trim exception
39 table entries. */
40}
41
42void *module_alloc(unsigned long size)
43{
44 struct vm_struct *area;
45
46 if (!size)
47 return NULL;
48 size = PAGE_ALIGN(size);
49 if (size > MODULES_LEN)
50 return NULL;
51
52 area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
53 if (!area)
54 return NULL;
55
56 return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC);
57}
58#endif
59
60/* We don't need anything special. */
61int module_frob_arch_sections(Elf_Ehdr *hdr,
62 Elf_Shdr *sechdrs,
63 char *secstrings,
64 struct module *mod)
65{
66 return 0;
67}
68
69int apply_relocate_add(Elf64_Shdr *sechdrs,
70 const char *strtab,
71 unsigned int symindex,
72 unsigned int relsec,
73 struct module *me)
74{
75 unsigned int i;
76 Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr;
77 Elf64_Sym *sym;
78 void *loc;
79 u64 val;
80
81 DEBUGP("Applying relocate section %u to %u\n", relsec,
82 sechdrs[relsec].sh_info);
83 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
84 /* This is where to make the change */
85 loc = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
86 + rel[i].r_offset;
87
88 /* This is the symbol it is referring to. Note that all
89 undefined symbols have been resolved. */
90 sym = (Elf64_Sym *)sechdrs[symindex].sh_addr
91 + ELF64_R_SYM(rel[i].r_info);
92
93 DEBUGP("type %d st_value %Lx r_addend %Lx loc %Lx\n",
94 (int)ELF64_R_TYPE(rel[i].r_info),
95 sym->st_value, rel[i].r_addend, (u64)loc);
96
97 val = sym->st_value + rel[i].r_addend;
98
99 switch (ELF64_R_TYPE(rel[i].r_info)) {
100 case R_X86_64_NONE:
101 break;
102 case R_X86_64_64:
103 *(u64 *)loc = val;
104 break;
105 case R_X86_64_32:
106 *(u32 *)loc = val;
107 if (val != *(u32 *)loc)
108 goto overflow;
109 break;
110 case R_X86_64_32S:
111 *(s32 *)loc = val;
112 if ((s64)val != *(s32 *)loc)
113 goto overflow;
114 break;
115 case R_X86_64_PC32:
116 val -= (u64)loc;
117 *(u32 *)loc = val;
118#if 0
119 if ((s64)val != *(s32 *)loc)
120 goto overflow;
121#endif
122 break;
123 default:
124 printk(KERN_ERR "module %s: Unknown rela relocation: %Lu\n",
125 me->name, ELF64_R_TYPE(rel[i].r_info));
126 return -ENOEXEC;
127 }
128 }
129 return 0;
130
131overflow:
132 printk(KERN_ERR "overflow in relocation type %d val %Lx\n",
133 (int)ELF64_R_TYPE(rel[i].r_info), val);
134 printk(KERN_ERR "`%s' likely not compiled with -mcmodel=kernel\n",
135 me->name);
136 return -ENOEXEC;
137}
138
139int apply_relocate(Elf_Shdr *sechdrs,
140 const char *strtab,
141 unsigned int symindex,
142 unsigned int relsec,
143 struct module *me)
144{
145 printk("non add relocation not supported\n");
146 return -ENOSYS;
147}
148
149int module_finalize(const Elf_Ehdr *hdr,
150 const Elf_Shdr *sechdrs,
151 struct module *me)
152{
153 const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL;
154 char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
155
156 for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
157 if (!strcmp(".text", secstrings + s->sh_name))
158 text = s;
159 if (!strcmp(".altinstructions", secstrings + s->sh_name))
160 alt = s;
161 if (!strcmp(".smp_locks", secstrings + s->sh_name))
162 locks= s;
163 }
164
165 if (alt) {
166 /* patch .altinstructions */
167 void *aseg = (void *)alt->sh_addr;
168 apply_alternatives(aseg, aseg + alt->sh_size);
169 }
170 if (locks && text) {
171 void *lseg = (void *)locks->sh_addr;
172 void *tseg = (void *)text->sh_addr;
173 alternatives_smp_module_add(me, me->name,
174 lseg, lseg + locks->sh_size,
175 tseg, tseg + text->sh_size);
176 }
177
178 return module_bug_finalize(hdr, sechdrs, me);
179}
180
181void module_arch_cleanup(struct module *mod)
182{
183 alternatives_smp_module_del(mod);
184 module_bug_cleanup(mod);
185}
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