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 further 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
 81int module_trampoline_target(struct module *mod, unsigned long trampoline,
 82			     unsigned long *target);
 83
 84#ifdef CONFIG_DYNAMIC_FTRACE
 85int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs);
 86#else
 87static inline int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs)
 88{
 89	return 0;
 90}
 91#endif
 92
 93struct exception_table_entry;
 94void sort_ex_table(struct exception_table_entry *start,
 95		   struct exception_table_entry *finish);
 96
 97#if defined(CONFIG_MODVERSIONS) && defined(CONFIG_PPC64)
 98#define ARCH_RELOCATES_KCRCTAB
 99#define reloc_start PHYSICAL_START
100#endif
101#endif /* __KERNEL__ */
102#endif	/* _ASM_POWERPC_MODULE_H */

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2#ifndef _ASM_POWERPC_MODULE_H
 3#define _ASM_POWERPC_MODULE_H
 4#ifdef __KERNEL__
 5
 6#include <linux/list.h>
 7#include <asm/bug.h>
 8#include <asm-generic/module.h>
 9
10#ifndef __powerpc64__
11/*
12 * Thanks to Paul M for explaining this.
13 *
14 * PPC can only do rel jumps += 32MB, and often the kernel and other
15 * modules are further away than this.  So, we jump to a table of
16 * trampolines attached to the module (the Procedure Linkage Table)
17 * whenever that happens.
18 */
19
20struct ppc_plt_entry {
21	/* 16 byte jump instruction sequence (4 instructions) */
22	unsigned int jump[4];
23};
24#endif	/* __powerpc64__ */
25
26
27struct mod_arch_specific {
28#ifdef __powerpc64__
29	unsigned int stubs_section;	/* Index of stubs section in module */
30#ifdef CONFIG_PPC_KERNEL_PCREL
31	unsigned int got_section;	/* What section is the GOT? */
32	unsigned int pcpu_section;	/* .data..percpu section */
33#else
34	unsigned int toc_section;	/* What section is the TOC? */
35	bool toc_fixed;			/* Have we fixed up .TOC.? */
36#endif
37
38	/* For module function descriptor dereference */
39	unsigned long start_opd;
40	unsigned long end_opd;
41#else /* powerpc64 */
42	/* Indices of PLT sections within module. */
43	unsigned int core_plt_section;
44	unsigned int init_plt_section;
45#endif /* powerpc64 */
46
47#ifdef CONFIG_DYNAMIC_FTRACE
48	unsigned long tramp;
49	unsigned long tramp_regs;
50#endif
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 sections 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#        ifdef CONFIG_PPC_KERNEL_PCREL
67	    asm(".section .mygot,\"a\",@nobits; .align 3; .previous");
68#        endif
69#    endif
70#else
71#    ifdef MODULE
72	asm(".section .plt,\"ax\",@nobits; .align 3; .previous");
73	asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous");
74#    endif	/* MODULE */
75#endif
76
77#ifdef CONFIG_DYNAMIC_FTRACE
78int module_trampoline_target(struct module *mod, unsigned long trampoline,
79			     unsigned long *target);
80int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs);
81#else
82static inline int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs)
83{
84	return 0;
85}
86#endif
87
88#endif /* __KERNEL__ */
89#endif	/* _ASM_POWERPC_MODULE_H */