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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
30static LIST_HEAD(module_bug_list);
31
32static 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
46int 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
76
77 sect = find_section(hdr, sechdrs, "__lwsync_fixup");
78 if (sect != NULL)
79 do_lwsync_fixups(cur_cpu_spec->cpu_features,
80 (void *)sect->sh_addr,
81 (void *)sect->sh_addr + sect->sh_size);
82
83 return 0;
84}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* Kernel module help for powerpc.
3 Copyright (C) 2001, 2003 Rusty Russell IBM Corporation.
4 Copyright (C) 2008 Freescale Semiconductor, Inc.
5
6*/
7#include <linux/elf.h>
8#include <linux/moduleloader.h>
9#include <linux/err.h>
10#include <linux/vmalloc.h>
11#include <linux/bug.h>
12#include <asm/module.h>
13#include <linux/uaccess.h>
14#include <asm/firmware.h>
15#include <linux/sort.h>
16#include <asm/setup.h>
17
18static LIST_HEAD(module_bug_list);
19
20static const Elf_Shdr *find_section(const Elf_Ehdr *hdr,
21 const Elf_Shdr *sechdrs,
22 const char *name)
23{
24 char *secstrings;
25 unsigned int i;
26
27 secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
28 for (i = 1; i < hdr->e_shnum; i++)
29 if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
30 return &sechdrs[i];
31 return NULL;
32}
33
34int module_finalize(const Elf_Ehdr *hdr,
35 const Elf_Shdr *sechdrs, struct module *me)
36{
37 const Elf_Shdr *sect;
38 int rc;
39
40 rc = module_finalize_ftrace(me, sechdrs);
41 if (rc)
42 return rc;
43
44 /* Apply feature fixups */
45 sect = find_section(hdr, sechdrs, "__ftr_fixup");
46 if (sect != NULL)
47 do_feature_fixups(cur_cpu_spec->cpu_features,
48 (void *)sect->sh_addr,
49 (void *)sect->sh_addr + sect->sh_size);
50
51 sect = find_section(hdr, sechdrs, "__mmu_ftr_fixup");
52 if (sect != NULL)
53 do_feature_fixups(cur_cpu_spec->mmu_features,
54 (void *)sect->sh_addr,
55 (void *)sect->sh_addr + sect->sh_size);
56
57#ifdef CONFIG_PPC64
58 sect = find_section(hdr, sechdrs, "__fw_ftr_fixup");
59 if (sect != NULL)
60 do_feature_fixups(powerpc_firmware_features,
61 (void *)sect->sh_addr,
62 (void *)sect->sh_addr + sect->sh_size);
63#endif /* CONFIG_PPC64 */
64
65#ifdef PPC64_ELF_ABI_v1
66 sect = find_section(hdr, sechdrs, ".opd");
67 if (sect != NULL) {
68 me->arch.start_opd = sect->sh_addr;
69 me->arch.end_opd = sect->sh_addr + sect->sh_size;
70 }
71#endif /* PPC64_ELF_ABI_v1 */
72
73#ifdef CONFIG_PPC_BARRIER_NOSPEC
74 sect = find_section(hdr, sechdrs, "__spec_barrier_fixup");
75 if (sect != NULL)
76 do_barrier_nospec_fixups_range(barrier_nospec_enabled,
77 (void *)sect->sh_addr,
78 (void *)sect->sh_addr + sect->sh_size);
79#endif /* CONFIG_PPC_BARRIER_NOSPEC */
80
81 sect = find_section(hdr, sechdrs, "__lwsync_fixup");
82 if (sect != NULL)
83 do_lwsync_fixups(cur_cpu_spec->cpu_features,
84 (void *)sect->sh_addr,
85 (void *)sect->sh_addr + sect->sh_size);
86
87 return 0;
88}