| Jon Loeliger | 6b9269a | 2005-09-01 15:51:52 -0500 | [diff] [blame] | 1 | #ifndef _POWERPC_MODULE_H |
| 2 | #define _POWERPC_MODULE_H |
| 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 | |
| 77 | #endif /* _POWERPC_MODULE_H */ |