1/*
 2 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of the GNU General Public License
 6 * as published by the Free Software Foundation; either version 2
 7 * of the License, or (at your option) any later version.
 8 *
 9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef _ARCH_H
19#define _ARCH_H
20
21#include <stdbool.h>
22#include <linux/list.h>
23#include "elf.h"
24#include "cfi.h"
25
26#define INSN_JUMP_CONDITIONAL	1
27#define INSN_JUMP_UNCONDITIONAL	2
28#define INSN_JUMP_DYNAMIC	3
29#define INSN_CALL		4
30#define INSN_CALL_DYNAMIC	5
31#define INSN_RETURN		6
32#define INSN_CONTEXT_SWITCH	7
33#define INSN_STACK		8
34#define INSN_BUG		9
35#define INSN_NOP		10
36#define INSN_OTHER		11
37#define INSN_LAST		INSN_OTHER
38
39enum op_dest_type {
40	OP_DEST_REG,
41	OP_DEST_REG_INDIRECT,
42	OP_DEST_MEM,
43	OP_DEST_PUSH,
44	OP_DEST_LEAVE,
45};
46
47struct op_dest {
48	enum op_dest_type type;
49	unsigned char reg;
50	int offset;
51};
52
53enum op_src_type {
54	OP_SRC_REG,
55	OP_SRC_REG_INDIRECT,
56	OP_SRC_CONST,
57	OP_SRC_POP,
58	OP_SRC_ADD,
59	OP_SRC_AND,
60};
61
62struct op_src {
63	enum op_src_type type;
64	unsigned char reg;
65	int offset;
66};
67
68struct stack_op {
69	struct op_dest dest;
70	struct op_src src;
71};
72
73void arch_initial_func_cfi_state(struct cfi_state *state);
74
75int arch_decode_instruction(struct elf *elf, struct section *sec,
76			    unsigned long offset, unsigned int maxlen,
77			    unsigned int *len, unsigned char *type,
78			    unsigned long *immediate, struct stack_op *op);
79
80bool arch_callee_saved_reg(unsigned char reg);
81
82#endif /* _ARCH_H */