1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com> 4 */ 5 6 #ifndef _ARCH_H 7 #define _ARCH_H 8 9 #include <stdbool.h> 10 #include <linux/list.h> 11 #include <objtool/objtool.h> 12 #include <objtool/cfi.h> 13 14 enum insn_type { 15 INSN_JUMP_CONDITIONAL, 16 INSN_JUMP_UNCONDITIONAL, 17 INSN_JUMP_DYNAMIC, 18 INSN_JUMP_DYNAMIC_CONDITIONAL, 19 INSN_CALL, 20 INSN_CALL_DYNAMIC, 21 INSN_RETURN, 22 INSN_CONTEXT_SWITCH, 23 INSN_BUG, 24 INSN_NOP, 25 INSN_STAC, 26 INSN_CLAC, 27 INSN_STD, 28 INSN_CLD, 29 INSN_TRAP, 30 INSN_OTHER, 31 }; 32 33 enum op_dest_type { 34 OP_DEST_REG, 35 OP_DEST_REG_INDIRECT, 36 OP_DEST_MEM, 37 OP_DEST_PUSH, 38 OP_DEST_PUSHF, 39 }; 40 41 struct op_dest { 42 enum op_dest_type type; 43 unsigned char reg; 44 int offset; 45 }; 46 47 enum op_src_type { 48 OP_SRC_REG, 49 OP_SRC_REG_INDIRECT, 50 OP_SRC_CONST, 51 OP_SRC_POP, 52 OP_SRC_POPF, 53 OP_SRC_ADD, 54 OP_SRC_AND, 55 }; 56 57 struct op_src { 58 enum op_src_type type; 59 unsigned char reg; 60 int offset; 61 }; 62 63 struct stack_op { 64 struct op_dest dest; 65 struct op_src src; 66 struct list_head list; 67 }; 68 69 struct instruction; 70 71 void arch_initial_func_cfi_state(struct cfi_init_state *state); 72 73 int arch_decode_instruction(const struct elf *elf, const struct section *sec, 74 unsigned long offset, unsigned int maxlen, 75 unsigned int *len, enum insn_type *type, 76 unsigned long *immediate, 77 struct list_head *ops_list); 78 79 bool arch_callee_saved_reg(unsigned char reg); 80 81 unsigned long arch_jump_destination(struct instruction *insn); 82 83 unsigned long arch_dest_reloc_offset(int addend); 84 85 const char *arch_nop_insn(int len); 86 const char *arch_ret_insn(int len); 87 88 int arch_decode_hint_reg(u8 sp_reg, int *base); 89 90 bool arch_is_retpoline(struct symbol *sym); 91 bool arch_is_rethunk(struct symbol *sym); 92 bool arch_is_embedded_insn(struct symbol *sym); 93 94 int arch_rewrite_retpolines(struct objtool_file *file); 95 96 #endif /* _ARCH_H */ 97