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 27struct ppc_plt_entry { 28 /* 16 byte jump instruction sequence (4 instructions) */ 29 unsigned int jump[4]; 30}; 31#endif /* __powerpc64__ */ 32 33 34struct 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 81bool is_module_trampoline(u32 *insns); 82int module_trampoline_target(struct module *mod, u32 *trampoline, 83 unsigned long *target); 84 85struct exception_table_entry; 86void 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