Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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
32LIST_HEAD(module_bug_list);
33
34void *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 */
43void module_free(struct module *mod, void *module_region)
44{
45 vfree(module_region);
46}
47
48static const Elf_Shdr *find_section(const Elf_Ehdr *hdr,
49 const Elf_Shdr *sechdrs,
50 const char *name)
51{
52 char *secstrings;
53 unsigned int i;
54
55 secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
56 for (i = 1; i < hdr->e_shnum; i++)
57 if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
58 return &sechdrs[i];
59 return NULL;
60}
61
62int module_finalize(const Elf_Ehdr *hdr,
63 const Elf_Shdr *sechdrs, struct module *me)
64{
65 const Elf_Shdr *sect;
66 int err;
67
68 err = module_bug_finalize(hdr, sechdrs, me);
69 if (err)
70 return err;
71
72 /* Apply feature fixups */
73 sect = find_section(hdr, sechdrs, "__ftr_fixup");
74 if (sect != NULL)
75 do_feature_fixups(cur_cpu_spec->cpu_features,
76 (void *)sect->sh_addr,
77 (void *)sect->sh_addr + sect->sh_size);
78
79 sect = find_section(hdr, sechdrs, "__mmu_ftr_fixup");
80 if (sect != NULL)
81 do_feature_fixups(cur_cpu_spec->mmu_features,
82 (void *)sect->sh_addr,
83 (void *)sect->sh_addr + sect->sh_size);
84
85#ifdef CONFIG_PPC64
86 sect = find_section(hdr, sechdrs, "__fw_ftr_fixup");
87 if (sect != NULL)
88 do_feature_fixups(powerpc_firmware_features,
89 (void *)sect->sh_addr,
90 (void *)sect->sh_addr + sect->sh_size);
91#endif
92
93 sect = find_section(hdr, sechdrs, "__lwsync_fixup");
94 if (sect != NULL)
95 do_lwsync_fixups(cur_cpu_spec->cpu_features,
96 (void *)sect->sh_addr,
97 (void *)sect->sh_addr + sect->sh_size);
98
99 return 0;
100}
101
102void module_arch_cleanup(struct module *mod)
103{
104 module_bug_cleanup(mod);
105}