cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

dmg-bz2.c (2130B)

      1/*
      2 * DMG bzip2 uncompression
      3 *
      4 * Copyright (c) 2004 Johannes E. Schindelin
      5 * Copyright (c) 2016 Red Hat, Inc.
      6 *
      7 * Permission is hereby granted, free of charge, to any person obtaining a copy
      8 * of this software and associated documentation files (the "Software"), to deal
      9 * in the Software without restriction, including without limitation the rights
     10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     11 * copies of the Software, and to permit persons to whom the Software is
     12 * furnished to do so, subject to the following conditions:
     13 *
     14 * The above copyright notice and this permission notice shall be included in
     15 * all copies or substantial portions of the Software.
     16 *
     17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     23 * THE SOFTWARE.
     24 */
     25#include "qemu/osdep.h"
     26#include "dmg.h"
     27#include <bzlib.h>
     28
     29static int dmg_uncompress_bz2_do(char *next_in, unsigned int avail_in,
     30                                 char *next_out, unsigned int avail_out)
     31{
     32    int ret;
     33    uint64_t total_out;
     34    bz_stream bzstream = {};
     35
     36    ret = BZ2_bzDecompressInit(&bzstream, 0, 0);
     37    if (ret != BZ_OK) {
     38        return -1;
     39    }
     40    bzstream.next_in = next_in;
     41    bzstream.avail_in = avail_in;
     42    bzstream.next_out = next_out;
     43    bzstream.avail_out = avail_out;
     44    ret = BZ2_bzDecompress(&bzstream);
     45    total_out = ((uint64_t)bzstream.total_out_hi32 << 32) +
     46                bzstream.total_out_lo32;
     47    BZ2_bzDecompressEnd(&bzstream);
     48    if (ret != BZ_STREAM_END ||
     49        total_out != avail_out) {
     50        return -1;
     51    }
     52    return 0;
     53}
     54
     55__attribute__((constructor))
     56static void dmg_bz2_init(void)
     57{
     58    assert(!dmg_uncompress_bz2);
     59    dmg_uncompress_bz2 = dmg_uncompress_bz2_do;
     60}