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 26 struct ppc_plt_entry { 27 /* 16 byte jump instruction sequence (4 instructions) */ 28 unsigned int jump[4]; 29 }; 30 #endif /* __powerpc64__ */ 31 32 33 struct 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 #ifdef CONFIG_DYNAMIC_FTRACE 38 unsigned long toc; 39 unsigned long tramp; 40 #endif 41 42 #else /* powerpc64 */ 43 /* Indices of PLT sections within module. */ 44 unsigned int core_plt_section; 45 unsigned int init_plt_section; 46 #ifdef CONFIG_DYNAMIC_FTRACE 47 unsigned long tramp; 48 #endif 49 #endif /* powerpc64 */ 50 51 /* List of BUG addresses, source line numbers and filenames */ 52 struct list_head bug_list; 53 struct bug_entry *bug_table; 54 unsigned int num_bugs; 55 }; 56 57 /* 58 * Select ELF headers. 59 * Make empty section for module_frob_arch_sections to expand. 60 */ 61 62 #ifdef __powerpc64__ 63 # define Elf_Shdr Elf64_Shdr 64 # define Elf_Sym Elf64_Sym 65 # define Elf_Ehdr Elf64_Ehdr 66 # ifdef MODULE 67 asm(".section .stubs,\"ax\",@nobits; .align 3; .previous"); 68 # endif 69 #else 70 # define Elf_Shdr Elf32_Shdr 71 # define Elf_Sym Elf32_Sym 72 # define Elf_Ehdr Elf32_Ehdr 73 # ifdef MODULE 74 asm(".section .plt,\"ax\",@nobits; .align 3; .previous"); 75 asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous"); 76 # endif /* MODULE */ 77 #endif 78 79 #ifdef CONFIG_DYNAMIC_FTRACE 80 # ifdef MODULE 81 asm(".section .ftrace.tramp,\"ax\",@nobits; .align 3; .previous"); 82 # endif /* MODULE */ 83 #endif 84 85 86 struct exception_table_entry; 87 void sort_ex_table(struct exception_table_entry *start, 88 struct exception_table_entry *finish); 89 90 #if defined(CONFIG_MODVERSIONS) && defined(CONFIG_PPC64) 91 #define ARCH_RELOCATES_KCRCTAB 92 #define reloc_start PHYSICAL_START 93 #endif 94 #endif /* __KERNEL__ */ 95 #endif /* _ASM_POWERPC_MODULE_H */ 96