trace/mem-internal.h

   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 static inline uint8_t trace_mem_get_info(TCGMemOp op, bool store)
  14 {
  15     uint8_t res = op;
  16     bool be = (op & MO_BSWAP) == MO_BE;
  17
  18     /* remove untraced fields */
  19     res &= (1ULL << 4) - 1;
  20     /* make endianness absolute */
  21     res &= ~MO_BSWAP;
  22     if (be) {
  23         res |= 1ULL << 3;
  24     }
  25     /* add fields */
  26     if (store) {
  27         res |= 1ULL << 4;
  28     }
  29
  30     return res;
  31 }
  32
  33 static inline uint8_t trace_mem_build_info(
  34     TCGMemOp size, bool sign_extend, TCGMemOp endianness, bool store)
  35 {
  36     uint8_t res = 0;
  37     res |= size;
  38     res |= (sign_extend << 2);
  39     if (endianness == MO_BE) {
  40         res |= (1ULL << 3);
  41     }
  42     res |= (store << 4);
  43     return res;
  44 }
  45
  46 #endif /* TRACE__MEM_INTERNAL_H */