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1#ifndef _ASM_POWERPC_MODULE_H
2#define _ASM_POWERPC_MODULE_H
3#ifdef __KERNEL__
4
5/*
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/list.h>
13#include <asm/bug.h>
14#include <asm-generic/module.h>
15
16
17#ifndef __powerpc64__
18/*
19 * Thanks to Paul M for explaining this.
20 *
21 * PPC can only do rel jumps += 32MB, and often the kernel and other
22 * modules are furthur away than this. So, we jump to a table of
23 * trampolines attached to the module (the Procedure Linkage Table)
24 * whenever that happens.
25 */
26
27struct ppc_plt_entry {
28 /* 16 byte jump instruction sequence (4 instructions) */
29 unsigned int jump[4];
30};
31#endif /* __powerpc64__ */
32
33
34struct mod_arch_specific {
35#ifdef __powerpc64__
36 unsigned int stubs_section; /* Index of stubs section in module */
37 unsigned int toc_section; /* What section is the TOC? */
38#ifdef CONFIG_DYNAMIC_FTRACE
39 unsigned long toc;
40 unsigned long tramp;
41#endif
42
43#else /* powerpc64 */
44 /* Indices of PLT sections within module. */
45 unsigned int core_plt_section;
46 unsigned int init_plt_section;
47#ifdef CONFIG_DYNAMIC_FTRACE
48 unsigned long tramp;
49#endif
50#endif /* powerpc64 */
51
52 /* List of BUG addresses, source line numbers and filenames */
53 struct list_head bug_list;
54 struct bug_entry *bug_table;
55 unsigned int num_bugs;
56};
57
58/*
59 * Select ELF headers.
60 * Make empty section for module_frob_arch_sections to expand.
61 */
62
63#ifdef __powerpc64__
64# ifdef MODULE
65 asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
66# endif
67#else
68# ifdef MODULE
69 asm(".section .plt,\"ax\",@nobits; .align 3; .previous");
70 asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous");
71# endif /* MODULE */
72#endif
73
74#ifdef CONFIG_DYNAMIC_FTRACE
75# ifdef MODULE
76 asm(".section .ftrace.tramp,\"ax\",@nobits; .align 3; .previous");
77# endif /* MODULE */
78#endif
79
80
81struct exception_table_entry;
82void sort_ex_table(struct exception_table_entry *start,
83 struct exception_table_entry *finish);
84
85#if defined(CONFIG_MODVERSIONS) && defined(CONFIG_PPC64)
86#define ARCH_RELOCATES_KCRCTAB
87#define reloc_start PHYSICAL_START
88#endif
89#endif /* __KERNEL__ */
90#endif /* _ASM_POWERPC_MODULE_H */