cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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replay-time.c (1547B)

      1/*
      2 * replay-time.c
      3 *
      4 * Copyright (c) 2010-2015 Institute for System Programming
      5 *                         of the Russian Academy of Sciences.
      6 *
      7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
      8 * See the COPYING file in the top-level directory.
      9 *
     10 */
     11
     12#include "qemu/osdep.h"
     13#include "sysemu/replay.h"
     14#include "replay-internal.h"
     15#include "qemu/error-report.h"
     16
     17int64_t replay_save_clock(ReplayClockKind kind, int64_t clock,
     18                          int64_t raw_icount)
     19{
     20    g_assert(replay_file);
     21    g_assert(replay_mutex_locked());
     22
     23    /*
     24     * Due to the caller's locking requirements we get the icount from it
     25     * instead of using replay_save_instructions().
     26     */
     27    replay_advance_current_icount(raw_icount);
     28    replay_put_event(EVENT_CLOCK + kind);
     29    replay_put_qword(clock);
     30
     31    return clock;
     32}
     33
     34void replay_read_next_clock(ReplayClockKind kind)
     35{
     36    unsigned int read_kind = replay_state.data_kind - EVENT_CLOCK;
     37
     38    assert(read_kind == kind);
     39
     40    int64_t clock = replay_get_qword();
     41
     42    replay_check_error();
     43    replay_finish_event();
     44
     45    replay_state.cached_clock[read_kind] = clock;
     46}
     47
     48/*! Reads next clock event from the input. */
     49int64_t replay_read_clock(ReplayClockKind kind, int64_t raw_icount)
     50{
     51    int64_t ret;
     52    g_assert(replay_file && replay_mutex_locked());
     53
     54    replay_advance_current_icount(raw_icount);
     55
     56    if (replay_next_event_is(EVENT_CLOCK + kind)) {
     57        replay_read_next_clock(kind);
     58    }
     59    ret = replay_state.cached_clock[kind];
     60
     61    return ret;
     62}