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 27 struct ppc_plt_entry { 28 /* 16 byte jump instruction sequence (4 instructions) */ 29 unsigned int jump[4]; 30 }; 31 #endif /* __powerpc64__ */ 32 33 34 struct 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 81 struct exception_table_entry; 82 void sort_ex_table(struct exception_table_entry *start, 83 struct exception_table_entry *finish); 84 85 #ifdef CONFIG_MODVERSIONS 86 #define ARCH_RELOCATES_KCRCTAB 87 88 extern const unsigned long reloc_start[]; 89 #endif 90 #endif /* __KERNEL__ */ 91 #endif /* _ASM_POWERPC_MODULE_H */ 92