Linux kernel mirror (for testing)
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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
15
16#ifndef __powerpc64__
17/*
18 * Thanks to Paul M for explaining this.
19 *
20 * PPC can only do rel jumps += 32MB, and often the kernel and other
21 * modules are furthur away than this. So, we jump to a table of
22 * trampolines attached to the module (the Procedure Linkage Table)
23 * whenever that happens.
24 */
25
26struct ppc_plt_entry {
27 /* 16 byte jump instruction sequence (4 instructions) */
28 unsigned int jump[4];
29};
30#endif /* __powerpc64__ */
31
32
33struct mod_arch_specific {
34#ifdef __powerpc64__
35 unsigned int stubs_section; /* Index of stubs section in module */
36 unsigned int toc_section; /* What section is the TOC? */
37#else
38 /* Indices of PLT sections within module. */
39 unsigned int core_plt_section;
40 unsigned int init_plt_section;
41#endif
42
43 /* List of BUG addresses, source line numbers and filenames */
44 struct list_head bug_list;
45 struct bug_entry *bug_table;
46 unsigned int num_bugs;
47};
48
49/*
50 * Select ELF headers.
51 * Make empty section for module_frob_arch_sections to expand.
52 */
53
54#ifdef __powerpc64__
55# define Elf_Shdr Elf64_Shdr
56# define Elf_Sym Elf64_Sym
57# define Elf_Ehdr Elf64_Ehdr
58# ifdef MODULE
59 asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
60# endif
61#else
62# define Elf_Shdr Elf32_Shdr
63# define Elf_Sym Elf32_Sym
64# define Elf_Ehdr Elf32_Ehdr
65# ifdef MODULE
66 asm(".section .plt,\"ax\",@nobits; .align 3; .previous");
67 asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous");
68# endif /* MODULE */
69#endif
70
71
72struct exception_table_entry;
73void sort_ex_table(struct exception_table_entry *start,
74 struct exception_table_entry *finish);
75
76#endif /* __KERNEL__ */
77#endif /* _ASM_POWERPC_MODULE_H */