mirror of
https://github.com/crash-utility/crash
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a584e9752f
Port the improved decompression method for "lzo" in the kernel to
support decompression of "lzorle".
Since Linux 5.1, the default compression algorithm for zram was changed
from "lzo" to "lzo-rle". The crash-utility only supports decompression
for "lzo", when parsing vmcore files that utilize zram compression, such
as when using the gcore command to detach process core dump files,
parsing cannot be completed successfully.
before:
crash> gcore -v 0 1
gcore: WARNING: only the lzo compressor is supported
gcore: WARNING: only the lzo compressor is supported
gcore: WARNING: only the lzo compressor is supported
gcore: WARNING: only the lzo compressor is supported
after:
crash> gcore -v 0 1
Saved core.1.init
Signed-off-by: yulong.tang <yulong.t...@nio.com>
Reviewed-by: Tao Liu <l...@redhat.com>
Signed-off-by: Kazuhito Hagio <k-hagio...@nec.com>
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* lzorle_decompress.h
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*
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* from kernel lib/lzo/lzodefs.h
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*
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* Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <mar...@oberhumer.com>
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* Copyright (C) 2024 NIO
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef LZODEFS_H
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#define LZODEFS_H
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#define COPY4(dst, src) memcpy((dst), (src), sizeof(uint32_t))
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#define COPY8(dst, src) memcpy((dst), (src), sizeof(uint64_t))
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#define M1_MAX_OFFSET 0x0400
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#define M2_MAX_OFFSET 0x0800
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#define M3_MAX_OFFSET 0x4000
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#define M4_MAX_OFFSET_V0 0xbfff
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#define M4_MAX_OFFSET_V1 0xbffe
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#define M1_MIN_LEN 2
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#define M1_MAX_LEN 2
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#define M2_MIN_LEN 3
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#define M2_MAX_LEN 8
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#define M3_MIN_LEN 3
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#define M3_MAX_LEN 33
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#define M4_MIN_LEN 3
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#define M4_MAX_LEN 9
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#define M1_MARKER 0
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#define M2_MARKER 64
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#define M3_MARKER 32
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#define M4_MARKER 16
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#define MIN_ZERO_RUN_LENGTH 4
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#define MAX_ZERO_RUN_LENGTH (2047 + MIN_ZERO_RUN_LENGTH)
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#define lzo_dict_t unsigned short
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#define D_BITS 13
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#define D_SIZE (1u << D_BITS)
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#define D_MASK (D_SIZE - 1)
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#define D_HIGH ((D_MASK >> 1) + 1)
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#define LZO_E_OK 0
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#define LZO_E_ERROR (-1)
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#define LZO_E_OUT_OF_MEMORY (-2)
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#define LZO_E_NOT_COMPRESSIBLE (-3)
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#define LZO_E_INPUT_OVERRUN (-4)
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#define LZO_E_OUTPUT_OVERRUN (-5)
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#define LZO_E_LOOKBEHIND_OVERRUN (-6)
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#define LZO_E_EOF_NOT_FOUND (-7)
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#define LZO_E_INPUT_NOT_CONSUMED (-8)
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#define LZO_E_NOT_YET_IMPLEMELZO_HFILESNTED (-9)
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#define LZO_E_INVALID_ARGUMENT (-10)
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#define HAVE_IP(x) ((unsigned long)(ip_end - ip) >= (unsigned long)(x))
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#define HAVE_OP(x) ((unsigned long)(op_end - op) >= (unsigned long)(x))
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#define NEED_IP(x) if (!HAVE_IP(x)) goto input_overrun
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#define NEED_OP(x) if (!HAVE_OP(x)) goto output_overrun
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#define TEST_LB(m_pos) if ((m_pos) < out) goto lookbehind_overrun
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int lzorle_decompress_safe(const unsigned char *in, unsigned long in_len,
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unsigned char *out, unsigned long *out_len, void *other/* NOT USED */);
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#endif
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