1/*
2 * Helper functions for guest memory tracing
3 *
4 * Copyright (C) 2016 Lluís Vilanova <vilanova@ac.upc.edu>
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
7 * See the COPYING file in the top-level directory.
8 */
9
10#ifndef TRACE__MEM_INTERNAL_H
11#define TRACE__MEM_INTERNAL_H
12
13#define TRACE_MEM_SZ_SHIFT_MASK 0x7 /* size shift mask */
14#define TRACE_MEM_SE (1ULL << 3) /* sign extended (y/n) */
15#define TRACE_MEM_BE (1ULL << 4) /* big endian (y/n) */
16#define TRACE_MEM_ST (1ULL << 5) /* store (y/n) */
17
18static inline uint8_t trace_mem_build_info(
19 int size_shift, bool sign_extend, MemOp endianness, bool store)
20{
21 uint8_t res;
22
23 res = size_shift & TRACE_MEM_SZ_SHIFT_MASK;
24 if (sign_extend) {
25 res |= TRACE_MEM_SE;
26 }
27 if (endianness == MO_BE) {
28 res |= TRACE_MEM_BE;
29 }
30 if (store) {
31 res |= TRACE_MEM_ST;
32 }
33 return res;
34}
35
36static inline uint8_t trace_mem_get_info(MemOp op, bool store)
37{
38 return trace_mem_build_info(op & MO_SIZE, !!(op & MO_SIGN),
39 op & MO_BSWAP, store);
40}
41
42static inline
43uint8_t trace_mem_build_info_no_se_be(int size_shift, bool store)
44{
45 return trace_mem_build_info(size_shift, false, MO_BE, store);
46}
47
48static inline
49uint8_t trace_mem_build_info_no_se_le(int size_shift, bool store)
50{
51 return trace_mem_build_info(size_shift, false, MO_LE, store);
52}
53
54#endif /* TRACE__MEM_INTERNAL_H */
55