Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2012 ARM Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #ifndef __ASM_MODULE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #define __ASM_MODULE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <asm-generic/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifdef CONFIG_ARM64_MODULE_PLTS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) struct mod_plt_sec {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	int			plt_shndx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	int			plt_num_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	int			plt_max_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct mod_arch_specific {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	struct mod_plt_sec	core;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	struct mod_plt_sec	init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	/* for CONFIG_DYNAMIC_FTRACE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	struct plt_entry	*ftrace_trampolines;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	/* for FIPS 140 certified kernel module */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	const Elf64_Rela	*text_relocations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	const Elf64_Rela	*rodata_relocations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	int			num_text_relocations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	int			num_rodata_relocations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) u64 module_emit_plt_entry(struct module *mod, Elf64_Shdr *sechdrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 			  void *loc, const Elf64_Rela *rela,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 			  Elf64_Sym *sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) u64 module_emit_veneer_for_adrp(struct module *mod, Elf64_Shdr *sechdrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 				void *loc, u64 val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #ifdef CONFIG_RANDOMIZE_BASE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) extern u64 module_alloc_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define module_alloc_base	((u64)_etext - MODULES_VSIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct plt_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	 * A program that conforms to the AArch64 Procedure Call Standard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	 * (AAPCS64) must assume that a veneer that alters IP0 (x16) and/or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	 * IP1 (x17) may be inserted at any branch instruction that is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	 * exposed to a relocation that supports long branches. Since that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	 * is exactly what we are dealing with here, we are free to use x16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	 * as a scratch register in the PLT veneers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	__le32	adrp;	/* adrp	x16, ....			*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	__le32	add;	/* add	x16, x16, #0x....		*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	__le32	br;	/* br	x16				*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static inline bool is_forbidden_offset_for_adrp(void *place)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	return IS_ENABLED(CONFIG_ARM64_ERRATUM_843419) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	       cpus_have_const_cap(ARM64_WORKAROUND_843419) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	       ((u64)place & 0xfff) >= 0xff8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct plt_entry get_plt_entry(u64 dst, void *pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) bool plt_entries_equal(const struct plt_entry *a, const struct plt_entry *b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static inline bool plt_entry_is_initialized(const struct plt_entry *e)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	return e->adrp || e->add || e->br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #endif /* __ASM_MODULE_H */