text: /* SPDX-License-Identifier: GPL-2.0-or-later */
  /*
   * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
   */
  
  #ifndef _ARCH_H
  #define _ARCH_H
  
  #include <stdbool.h>
  #include <linux/list.h>
  #include <objtool/objtool.h>
  #include <objtool/cfi.h>
  
  enum insn_type {
  	INSN_JUMP_CONDITIONAL,
  	INSN_JUMP_UNCONDITIONAL,
  	INSN_JUMP_DYNAMIC,
  	INSN_JUMP_DYNAMIC_CONDITIONAL,
  	INSN_CALL,
  	INSN_CALL_DYNAMIC,
  	INSN_RETURN,
  	INSN_CONTEXT_SWITCH,
  	INSN_BUG,
  	INSN_NOP,
  	INSN_STAC,
  	INSN_CLAC,
  	INSN_STD,
  	INSN_CLD,
  	INSN_OTHER,
  };
  
  enum op_dest_type {
  	OP_DEST_REG,
  	OP_DEST_REG_INDIRECT,
  	OP_DEST_MEM,
  	OP_DEST_PUSH,
  	OP_DEST_PUSHF,
  };
  
  struct op_dest {
  	enum op_dest_type type;
  	unsigned char reg;
  	int offset;
  };
  
  enum op_src_type {
  	OP_SRC_REG,
  	OP_SRC_REG_INDIRECT,
  	OP_SRC_CONST,
  	OP_SRC_POP,
  	OP_SRC_POPF,
  	OP_SRC_ADD,
  	OP_SRC_AND,
  };
  
  struct op_src {
  	enum op_src_type type;
  	unsigned char reg;
  	int offset;
  };
  
  struct stack_op {
  	struct op_dest dest;
  	struct op_src src;
  	struct list_head list;
  };
  
  struct instruction;
  
  void arch_initial_func_cfi_state(struct cfi_init_state *state);
  
  int arch_decode_instruction(const struct elf *elf, const struct section *sec,
  			    unsigned long offset, unsigned int maxlen,
  			    unsigned int *len, enum insn_type *type,
  			    unsigned long *immediate,
  			    struct list_head *ops_list);
  
  bool arch_callee_saved_reg(unsigned char reg);
  
  unsigned long arch_jump_destination(struct instruction *insn);
  
  unsigned long arch_dest_reloc_offset(int addend);
  
  const char *arch_nop_insn(int len);
  
  int arch_decode_hint_reg(struct instruction *insn, u8 sp_reg);
  
  bool arch_is_retpoline(struct symbol *sym);
  
  int arch_rewrite_retpolines(struct objtool_file *file);
  
  #endif /* _ARCH_H */
  