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_ENDBR, 31 INSN_OTHER, 32 }; 33 34 enum op_dest_type { 35 OP_DEST_REG, 36 OP_DEST_REG_INDIRECT, 37 OP_DEST_MEM, 38 OP_DEST_PUSH, 39 OP_DEST_PUSHF, 40 }; 41 42 struct op_dest { 43 enum op_dest_type type; 44 unsigned char reg; 45 int offset; 46 }; 47 48 enum op_src_type { 49 OP_SRC_REG, 50 OP_SRC_REG_INDIRECT, 51 OP_SRC_CONST, 52 OP_SRC_POP, 53 OP_SRC_POPF, 54 OP_SRC_ADD, 55 OP_SRC_AND, 56 }; 57 58 struct op_src { 59 enum op_src_type type; 60 unsigned char reg; 61 int offset; 62 }; 63 64 struct stack_op { 65 struct stack_op *next; 66 struct op_dest dest; 67 struct op_src src; 68 }; 69 70 struct instruction; 71 72 int arch_ftrace_match(char *name); 73 74 void arch_initial_func_cfi_state(struct cfi_init_state *state); 75 76 int arch_decode_instruction(struct objtool_file *file, const struct section *sec, 77 unsigned long offset, unsigned int maxlen, 78 struct instruction *insn); 79 80 bool arch_callee_saved_reg(unsigned char reg); 81 82 unsigned long arch_jump_destination(struct instruction *insn); 83 84 unsigned long arch_dest_reloc_offset(int addend); 85 86 const char *arch_nop_insn(int len); 87 const char *arch_ret_insn(int len); 88 89 int arch_decode_hint_reg(u8 sp_reg, int *base); 90 91 bool arch_is_retpoline(struct symbol *sym); 92 bool arch_is_rethunk(struct symbol *sym); 93 bool arch_is_embedded_insn(struct symbol *sym); 94 95 int arch_rewrite_retpolines(struct objtool_file *file); 96 97 bool arch_pc_relative_reloc(struct reloc *reloc); 98 99 #endif /* _ARCH_H */ 100