1 #ifndef _ASM_POWERPC_MODULE_H
2 #define _ASM_POWERPC_MODULE_H
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.
12 #include <linux/list.h>
14 #include <asm-generic/module.h>
17 #ifdef CONFIG_MPROFILE_KERNEL
18 #define MODULE_ARCH_VERMAGIC_FTRACE "mprofile-kernel "
20 #define MODULE_ARCH_VERMAGIC_FTRACE ""
23 #ifdef CONFIG_RELOCATABLE
24 #define MODULE_ARCH_VERMAGIC_RELOCATABLE "relocatable "
26 #define MODULE_ARCH_VERMAGIC_RELOCATABLE ""
29 #define MODULE_ARCH_VERMAGIC MODULE_ARCH_VERMAGIC_FTRACE MODULE_ARCH_VERMAGIC_RELOCATABLE
33 * Thanks to Paul M for explaining this.
35 * PPC can only do rel jumps += 32MB, and often the kernel and other
36 * modules are further away than this. So, we jump to a table of
37 * trampolines attached to the module (the Procedure Linkage Table)
38 * whenever that happens.
41 struct ppc_plt_entry {
42 /* 16 byte jump instruction sequence (4 instructions) */
45 #endif /* __powerpc64__ */
48 struct mod_arch_specific {
50 unsigned int stubs_section; /* Index of stubs section in module */
51 unsigned int toc_section; /* What section is the TOC? */
52 bool toc_fixed; /* Have we fixed up .TOC.? */
54 /* For module function descriptor dereference */
55 unsigned long start_opd;
56 unsigned long end_opd;
58 /* Indices of PLT sections within module. */
59 unsigned int core_plt_section;
60 unsigned int init_plt_section;
61 #endif /* powerpc64 */
63 #ifdef CONFIG_DYNAMIC_FTRACE
65 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
66 unsigned long tramp_regs;
70 /* List of BUG addresses, source line numbers and filenames */
71 struct list_head bug_list;
72 struct bug_entry *bug_table;
73 unsigned int num_bugs;
78 * Make empty section for module_frob_arch_sections to expand.
83 asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
87 asm(".section .plt,\"ax\",@nobits; .align 3; .previous");
88 asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous");
92 #ifdef CONFIG_DYNAMIC_FTRACE
94 asm(".section .ftrace.tramp,\"ax\",@nobits; .align 3; .previous");
98 int module_trampoline_target(struct module *mod, unsigned long trampoline,
99 unsigned long *target);
101 #ifdef CONFIG_DYNAMIC_FTRACE
102 int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs);
104 static inline int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs)
110 #endif /* __KERNEL__ */
111 #endif /* _ASM_POWERPC_MODULE_H */