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-audio.c (2397B)

      1/*
      2 * replay-audio.c
      3 *
      4 * Copyright (c) 2010-2017 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 "qemu/error-report.h"
     14#include "sysemu/replay.h"
     15#include "replay-internal.h"
     16#include "audio/audio.h"
     17
     18void replay_audio_out(size_t *played)
     19{
     20    if (replay_mode == REPLAY_MODE_RECORD) {
     21        g_assert(replay_mutex_locked());
     22        replay_save_instructions();
     23        replay_put_event(EVENT_AUDIO_OUT);
     24        replay_put_qword(*played);
     25    } else if (replay_mode == REPLAY_MODE_PLAY) {
     26        g_assert(replay_mutex_locked());
     27        replay_account_executed_instructions();
     28        if (replay_next_event_is(EVENT_AUDIO_OUT)) {
     29            *played = replay_get_qword();
     30            replay_finish_event();
     31        } else {
     32            error_report("Missing audio out event in the replay log");
     33            abort();
     34        }
     35    }
     36}
     37
     38void replay_audio_in(size_t *recorded, void *samples, size_t *wpos, size_t size)
     39{
     40    int pos;
     41    uint64_t left, right;
     42    if (replay_mode == REPLAY_MODE_RECORD) {
     43        g_assert(replay_mutex_locked());
     44        replay_save_instructions();
     45        replay_put_event(EVENT_AUDIO_IN);
     46        replay_put_qword(*recorded);
     47        replay_put_qword(*wpos);
     48        for (pos = (*wpos - *recorded + size) % size ; pos != *wpos
     49             ; pos = (pos + 1) % size) {
     50            audio_sample_to_uint64(samples, pos, &left, &right);
     51            replay_put_qword(left);
     52            replay_put_qword(right);
     53        }
     54    } else if (replay_mode == REPLAY_MODE_PLAY) {
     55        g_assert(replay_mutex_locked());
     56        replay_account_executed_instructions();
     57        if (replay_next_event_is(EVENT_AUDIO_IN)) {
     58            *recorded = replay_get_qword();
     59            *wpos = replay_get_qword();
     60            for (pos = (*wpos - *recorded + size) % size ; pos != *wpos
     61                 ; pos = (pos + 1) % size) {
     62                left = replay_get_qword();
     63                right = replay_get_qword();
     64                audio_sample_from_uint64(samples, pos, left, right);
     65            }
     66            replay_finish_event();
     67        } else {
     68            error_report("Missing audio in event in the replay log");
     69            abort();
     70        }
     71    }
     72}