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f0c426bc KG |
1 | /* Kernel module help for powerpc. |
2 | Copyright (C) 2001, 2003 Rusty Russell IBM Corporation. | |
3 | Copyright (C) 2008 Freescale Semiconductor, Inc. | |
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/module.h> | |
20 | #include <linux/elf.h> | |
21 | #include <linux/moduleloader.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/vmalloc.h> | |
24 | #include <linux/bug.h> | |
25 | #include <asm/module.h> | |
26 | #include <asm/uaccess.h> | |
27 | #include <asm/firmware.h> | |
28 | #include <linux/sort.h> | |
29 | ||
30 | #include "setup.h" | |
31 | ||
32 | LIST_HEAD(module_bug_list); | |
33 | ||
34 | void *module_alloc(unsigned long size) | |
35 | { | |
36 | if (size == 0) | |
37 | return NULL; | |
38 | ||
39 | return vmalloc_exec(size); | |
40 | } | |
41 | ||
42 | /* Free memory returned from module_alloc */ | |
43 | void module_free(struct module *mod, void *module_region) | |
44 | { | |
45 | vfree(module_region); | |
46 | /* FIXME: If module_region == mod->init_region, trim exception | |
47 | table entries. */ | |
48 | } | |
49 | ||
50 | static const Elf_Shdr *find_section(const Elf_Ehdr *hdr, | |
51 | const Elf_Shdr *sechdrs, | |
52 | const char *name) | |
53 | { | |
54 | char *secstrings; | |
55 | unsigned int i; | |
56 | ||
57 | secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; | |
58 | for (i = 1; i < hdr->e_shnum; i++) | |
59 | if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0) | |
60 | return &sechdrs[i]; | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | int module_finalize(const Elf_Ehdr *hdr, | |
65 | const Elf_Shdr *sechdrs, struct module *me) | |
66 | { | |
67 | const Elf_Shdr *sect; | |
68 | int err; | |
69 | ||
70 | err = module_bug_finalize(hdr, sechdrs, me); | |
71 | if (err) | |
72 | return err; | |
73 | ||
74 | /* Apply feature fixups */ | |
75 | sect = find_section(hdr, sechdrs, "__ftr_fixup"); | |
76 | if (sect != NULL) | |
77 | do_feature_fixups(cur_cpu_spec->cpu_features, | |
78 | (void *)sect->sh_addr, | |
79 | (void *)sect->sh_addr + sect->sh_size); | |
80 | ||
7c03d653 BH |
81 | sect = find_section(hdr, sechdrs, "__mmu_ftr_fixup"); |
82 | if (sect != NULL) | |
83 | do_feature_fixups(cur_cpu_spec->mmu_features, | |
84 | (void *)sect->sh_addr, | |
85 | (void *)sect->sh_addr + sect->sh_size); | |
86 | ||
f0c426bc KG |
87 | #ifdef CONFIG_PPC64 |
88 | sect = find_section(hdr, sechdrs, "__fw_ftr_fixup"); | |
89 | if (sect != NULL) | |
90 | do_feature_fixups(powerpc_firmware_features, | |
91 | (void *)sect->sh_addr, | |
92 | (void *)sect->sh_addr + sect->sh_size); | |
93 | #endif | |
94 | ||
2d1b2027 KG |
95 | sect = find_section(hdr, sechdrs, "__lwsync_fixup"); |
96 | if (sect != NULL) | |
97 | do_lwsync_fixups(cur_cpu_spec->cpu_features, | |
98 | (void *)sect->sh_addr, | |
99 | (void *)sect->sh_addr + sect->sh_size); | |
100 | ||
f0c426bc KG |
101 | return 0; |
102 | } | |
103 | ||
104 | void module_arch_cleanup(struct module *mod) | |
105 | { | |
106 | module_bug_cleanup(mod); | |
107 | } |