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 bool toc_fixed; /* Have we fixed up .TOC.? */ 39 #ifdef CONFIG_DYNAMIC_FTRACE 40 unsigned long toc; 41 unsigned long tramp; 42 #endif 43 44 #else /* powerpc64 */ 45 /* Indices of PLT sections within module. */ 46 unsigned int core_plt_section; 47 unsigned int init_plt_section; 48 #ifdef CONFIG_DYNAMIC_FTRACE 49 unsigned long tramp; 50 #endif 51 #endif /* powerpc64 */ 52 53 /* List of BUG addresses, source line numbers and filenames */ 54 struct list_head bug_list; 55 struct bug_entry *bug_table; 56 unsigned int num_bugs; 57 }; 58 59 /* 60 * Select ELF headers. 61 * Make empty section for module_frob_arch_sections to expand. 62 */ 63 64 #ifdef __powerpc64__ 65 # ifdef MODULE 66 asm(".section .stubs,\"ax\",@nobits; .align 3; .previous"); 67 # endif 68 #else 69 # ifdef MODULE 70 asm(".section .plt,\"ax\",@nobits; .align 3; .previous"); 71 asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous"); 72 # endif /* MODULE */ 73 #endif 74 75 #ifdef CONFIG_DYNAMIC_FTRACE 76 # ifdef MODULE 77 asm(".section .ftrace.tramp,\"ax\",@nobits; .align 3; .previous"); 78 # endif /* MODULE */ 79 #endif 80 81 bool is_module_trampoline(u32 *insns); 82 int module_trampoline_target(struct module *mod, u32 *trampoline, 83 unsigned long *target); 84 85 struct exception_table_entry; 86 void sort_ex_table(struct exception_table_entry *start, 87 struct exception_table_entry *finish); 88 89 #if defined(CONFIG_MODVERSIONS) && defined(CONFIG_PPC64) 90 #define ARCH_RELOCATES_KCRCTAB 91 #define reloc_start PHYSICAL_START 92 #endif 93 #endif /* __KERNEL__ */ 94 #endif /* _ASM_POWERPC_MODULE_H */ 95