jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
block: adding lzfse decompressing support as a module.
QEMU dmg support includes zlib and bzip2, but it does not contains lzfse
support. This commit adds the source file to extend compression support
for new DMGs.
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
authored by
Julio Faracco
and committed by
Kevin Wolf
c13e80d7
d8d5fefd
+49
+49
block/dmg-lzfse.c
+49
block/dmg-lzfse.c
···
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/*
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* DMG lzfse uncompression
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*
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* Copyright (c) 2018 Julio Cesar Faracco
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "dmg.h"
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#include <lzfse.h>
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static int dmg_uncompress_lzfse_do(char *next_in, unsigned int avail_in,
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char *next_out, unsigned int avail_out)
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{
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size_t out_size = lzfse_decode_buffer((uint8_t *) next_out, avail_out,
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(uint8_t *) next_in, avail_in,
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NULL);
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/* We need to decode the single chunk only. */
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/* So, out_size == avail_out is not an error here. */
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if (out_size > 0) {
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return out_size;
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}
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return -1;
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}
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__attribute__((constructor))
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static void dmg_lzfse_init(void)
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{
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assert(!dmg_uncompress_lzfse);
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dmg_uncompress_lzfse = dmg_uncompress_lzfse_do;
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}