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/elf.h>
20 #include <linux/moduleloader.h>
21 #include <linux/err.h>
22 #include <linux/vmalloc.h>
23 #include <linux/bug.h>
24 #include <asm/module.h>
25 #include <linux/uaccess.h>
26 #include <asm/firmware.h>
27 #include <linux/sort.h>
28 #include <asm/setup.h>
29
30 static LIST_HEAD(module_bug_list);
31
find_section(const Elf_Ehdr * hdr,const Elf_Shdr * sechdrs,const char * name)32 static const Elf_Shdr *find_section(const Elf_Ehdr *hdr,
33 const Elf_Shdr *sechdrs,
34 const char *name)
35 {
36 char *secstrings;
37 unsigned int i;
38
39 secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
40 for (i = 1; i < hdr->e_shnum; i++)
41 if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
42 return &sechdrs[i];
43 return NULL;
44 }
45
module_finalize(const Elf_Ehdr * hdr,const Elf_Shdr * sechdrs,struct module * me)46 int module_finalize(const Elf_Ehdr *hdr,
47 const Elf_Shdr *sechdrs, struct module *me)
48 {
49 const Elf_Shdr *sect;
50 int rc;
51
52 rc = module_finalize_ftrace(me, sechdrs);
53 if (rc)
54 return rc;
55
56 /* Apply feature fixups */
57 sect = find_section(hdr, sechdrs, "__ftr_fixup");
58 if (sect != NULL)
59 do_feature_fixups(cur_cpu_spec->cpu_features,
60 (void *)sect->sh_addr,
61 (void *)sect->sh_addr + sect->sh_size);
62
63 sect = find_section(hdr, sechdrs, "__mmu_ftr_fixup");
64 if (sect != NULL)
65 do_feature_fixups(cur_cpu_spec->mmu_features,
66 (void *)sect->sh_addr,
67 (void *)sect->sh_addr + sect->sh_size);
68
69 #ifdef CONFIG_PPC64
70 sect = find_section(hdr, sechdrs, "__fw_ftr_fixup");
71 if (sect != NULL)
72 do_feature_fixups(powerpc_firmware_features,
73 (void *)sect->sh_addr,
74 (void *)sect->sh_addr + sect->sh_size);
75 #endif /* CONFIG_PPC64 */
76
77 #ifdef CONFIG_PPC_BARRIER_NOSPEC
78 sect = find_section(hdr, sechdrs, "__spec_barrier_fixup");
79 if (sect != NULL)
80 do_barrier_nospec_fixups_range(barrier_nospec_enabled,
81 (void *)sect->sh_addr,
82 (void *)sect->sh_addr + sect->sh_size);
83 #endif /* CONFIG_PPC_BARRIER_NOSPEC */
84
85 sect = find_section(hdr, sechdrs, "__lwsync_fixup");
86 if (sect != NULL)
87 do_lwsync_fixups(cur_cpu_spec->cpu_features,
88 (void *)sect->sh_addr,
89 (void *)sect->sh_addr + sect->sh_size);
90
91 return 0;
92 }
93
