1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_ARM_MODULE_H
3 #define _ASM_ARM_MODULE_H
4 
5 #include <asm-generic/module.h>
6 #include <asm/unwind.h>
7 
8 #ifdef CONFIG_ARM_UNWIND
9 #define ELF_SECTION_UNWIND 0x70000001
10 #endif
11 
12 #define PLT_ENT_STRIDE		L1_CACHE_BYTES
13 #define PLT_ENT_COUNT		(PLT_ENT_STRIDE / sizeof(u32))
14 #define PLT_ENT_SIZE		(sizeof(struct plt_entries) / PLT_ENT_COUNT)
15 
16 struct plt_entries {
17 	u32	ldr[PLT_ENT_COUNT];
18 	u32	lit[PLT_ENT_COUNT];
19 };
20 
21 struct mod_plt_sec {
22 	struct elf32_shdr	*plt;
23 	struct plt_entries	*plt_ent;
24 	int			plt_count;
25 };
26 
27 struct mod_arch_specific {
28 #ifdef CONFIG_ARM_UNWIND
29 	struct list_head unwind_list;
30 	struct unwind_table *init_table;
31 #endif
32 #ifdef CONFIG_ARM_MODULE_PLTS
33 	struct mod_plt_sec	core;
34 	struct mod_plt_sec	init;
35 #endif
36 };
37 
38 struct module;
39 u32 get_module_plt(struct module *mod, unsigned long loc, Elf32_Addr val);
40 #ifdef CONFIG_ARM_MODULE_PLTS
41 bool in_module_plt(unsigned long loc);
42 #else
in_module_plt(unsigned long loc)43 static inline bool in_module_plt(unsigned long loc) { return false; }
44 #endif
45 
46 #ifdef CONFIG_THUMB2_KERNEL
47 #define HAVE_ARCH_KALLSYMS_SYMBOL_VALUE
kallsyms_symbol_value(const Elf_Sym * sym)48 static inline unsigned long kallsyms_symbol_value(const Elf_Sym *sym)
49 {
50 	if (ELF_ST_TYPE(sym->st_info) == STT_FUNC)
51 		return sym->st_value & ~1;
52 
53 	return sym->st_value;
54 }
55 #endif
56 
57 #endif /* _ASM_ARM_MODULE_H */
58