/*
 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _ARCH_H
#define _ARCH_H

#include <stdbool.h>
#include <linux/list.h>
#include "elf.h"
#include "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_EXCEPTION_RETURN,
	INSN_CONTEXT_SWITCH,
	INSN_STACK,
	INSN_BUG,
	INSN_NOP,
	INSN_STAC,
	INSN_CLAC,
	INSN_STD,
	INSN_CLD,
	INSN_TRAP,
	INSN_OTHER,
};

enum op_dest_type {
	OP_DEST_REG,
	OP_DEST_REG_INDIRECT,
	OP_DEST_MEM,
	OP_DEST_PUSH,
	OP_DEST_PUSHF,
	OP_DEST_LEAVE,
};

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;
};

void arch_initial_func_cfi_state(struct cfi_state *state);

int arch_decode_instruction(struct elf *elf, 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);

bool arch_is_rethunk(struct symbol *sym);
bool arch_is_embedded_insn(struct symbol *sym);

#endif /* _ARCH_H */