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a37c8875 | 1 | #ifndef _ASM_POWERPC_MODULE_H |
2 | #define _ASM_POWERPC_MODULE_H | |
6b9269ab JL |
3 | |
4 | /* | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version | |
8 | * 2 of the License, or (at your option) any later version. | |
9 | */ | |
10 | ||
11 | #include <linux/list.h> | |
12 | #include <asm/bug.h> | |
13 | ||
14 | ||
15 | #ifndef __powerpc64__ | |
16 | /* | |
17 | * Thanks to Paul M for explaining this. | |
18 | * | |
19 | * PPC can only do rel jumps += 32MB, and often the kernel and other | |
20 | * modules are furthur away than this. So, we jump to a table of | |
21 | * trampolines attached to the module (the Procedure Linkage Table) | |
22 | * whenever that happens. | |
23 | */ | |
24 | ||
25 | struct ppc_plt_entry { | |
26 | /* 16 byte jump instruction sequence (4 instructions) */ | |
27 | unsigned int jump[4]; | |
28 | }; | |
29 | #endif /* __powerpc64__ */ | |
30 | ||
31 | ||
32 | struct mod_arch_specific { | |
33 | #ifdef __powerpc64__ | |
34 | unsigned int stubs_section; /* Index of stubs section in module */ | |
35 | unsigned int toc_section; /* What section is the TOC? */ | |
36 | #else | |
37 | /* Indices of PLT sections within module. */ | |
38 | unsigned int core_plt_section; | |
39 | unsigned int init_plt_section; | |
40 | #endif | |
41 | ||
42 | /* List of BUG addresses, source line numbers and filenames */ | |
43 | struct list_head bug_list; | |
44 | struct bug_entry *bug_table; | |
45 | unsigned int num_bugs; | |
46 | }; | |
47 | ||
48 | extern struct bug_entry *module_find_bug(unsigned long bugaddr); | |
49 | ||
50 | /* | |
51 | * Select ELF headers. | |
52 | * Make empty section for module_frob_arch_sections to expand. | |
53 | */ | |
54 | ||
55 | #ifdef __powerpc64__ | |
56 | # define Elf_Shdr Elf64_Shdr | |
57 | # define Elf_Sym Elf64_Sym | |
58 | # define Elf_Ehdr Elf64_Ehdr | |
59 | # ifdef MODULE | |
60 | asm(".section .stubs,\"ax\",@nobits; .align 3; .previous"); | |
61 | # endif | |
62 | #else | |
63 | # define Elf_Shdr Elf32_Shdr | |
64 | # define Elf_Sym Elf32_Sym | |
65 | # define Elf_Ehdr Elf32_Ehdr | |
66 | # ifdef MODULE | |
67 | asm(".section .plt,\"ax\",@nobits; .align 3; .previous"); | |
68 | asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous"); | |
69 | # endif /* MODULE */ | |
70 | #endif | |
71 | ||
72 | ||
73 | struct exception_table_entry; | |
74 | void sort_ex_table(struct exception_table_entry *start, | |
75 | struct exception_table_entry *finish); | |
76 | ||
a37c8875 | 77 | #endif /* _ASM_POWERPC_MODULE_H */ |