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 #ifdef CC_USING_MPROFILE_KERNEL 18 #define MODULE_ARCH_VERMAGIC "mprofile-kernel" 19 #endif 20 21 #ifndef __powerpc64__ 22 /* 23 * Thanks to Paul M for explaining this. 24 * 25 * PPC can only do rel jumps += 32MB, and often the kernel and other 26 * modules are further away than this. So, we jump to a table of 27 * trampolines attached to the module (the Procedure Linkage Table) 28 * whenever that happens. 29 */ 30 31 struct ppc_plt_entry { 32 /* 16 byte jump instruction sequence (4 instructions) */ 33 unsigned int jump[4]; 34 }; 35 #endif /* __powerpc64__ */ 36 37 38 struct mod_arch_specific { 39 #ifdef __powerpc64__ 40 unsigned int stubs_section; /* Index of stubs section in module */ 41 unsigned int toc_section; /* What section is the TOC? */ 42 bool toc_fixed; /* Have we fixed up .TOC.? */ 43 #ifdef CONFIG_DYNAMIC_FTRACE 44 unsigned long toc; 45 unsigned long tramp; 46 #endif 47 48 #else /* powerpc64 */ 49 /* Indices of PLT sections within module. */ 50 unsigned int core_plt_section; 51 unsigned int init_plt_section; 52 #ifdef CONFIG_DYNAMIC_FTRACE 53 unsigned long tramp; 54 #endif 55 #endif /* powerpc64 */ 56 57 /* List of BUG addresses, source line numbers and filenames */ 58 struct list_head bug_list; 59 struct bug_entry *bug_table; 60 unsigned int num_bugs; 61 }; 62 63 /* 64 * Select ELF headers. 65 * Make empty section for module_frob_arch_sections to expand. 66 */ 67 68 #ifdef __powerpc64__ 69 # ifdef MODULE 70 asm(".section .stubs,\"ax\",@nobits; .align 3; .previous"); 71 # endif 72 #else 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 int module_trampoline_target(struct module *mod, unsigned long trampoline, 86 unsigned long *target); 87 88 #ifdef CONFIG_DYNAMIC_FTRACE 89 int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs); 90 #else 91 static inline int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs) 92 { 93 return 0; 94 } 95 #endif 96 97 #endif /* __KERNEL__ */ 98 #endif /* _ASM_POWERPC_MODULE_H */ 99