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https://github.com/ibm-s390-linux/s390-tools.git
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23e9156f43
Add DF_S390_DUMPER_MAGIC_SIZE constant to s390_dump.h. Use it instead of hardcoded length when processing dumper magics in zgetdump code. Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Acked-by: Alexander Egorenkov <egorenar@linux.ibm.com> Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
/*
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* s390 related definitions and functions.
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*
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* Copyright IBM Corp. 2013, 2023
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef S390_DUMP_H
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#define S390_DUMP_H
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#include <stdint.h>
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#include "boot/page.h"
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#include "lib/zt_common.h"
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/*
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* S390 dump format defines
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*/
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#define DF_S390_MAGIC 0xa8190173618f23fdULL
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#define DF_S390_MAGIC_EXT 0xa8190173618f23feULL
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#define DF_S390_HDR_SIZE 0x1000
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#define DF_S390_EM_SIZE 16
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#define DF_S390_EM_MAGIC 0x44554d505f454e44ULL
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#define DF_S390_EM_STR "DUMP_END"
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#define DF_S390_CPU_MAX 512
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#define DF_S390_MAGIC_BLK_ECKD 3
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#define DF_S390_DUMPER_MAGIC_SIZE 7
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#define DF_S390_DUMPER_MAGIC32 "ZECKD31"
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#define DF_S390_DUMPER_MAGIC64 "ZECKD64"
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#define DF_S390_DUMPER_MAGIC_EXT "XECKD64"
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#define DF_S390_DUMPER_MAGIC32_FBA "ZDFBA31"
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#define DF_S390_DUMPER_MAGIC64_FBA "ZDFBA64"
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#define DF_S390_DUMPER_MAGIC_FBA_EXT "XDFBA64"
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#define DF_S390_DUMPER_MAGIC_MV "ZMULT64"
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#define DF_S390_DUMPER_MAGIC_MV_EXT "XMULT64"
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#define OLD_DUMPER_HEX_INSTR1 "\x0d\x10\x47\xf0" /* BASR + 1st halfword of BC */
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#define OLD_DUMPER_HEX_INSTR2 "\x0d\xd0" /* BASR 13,0 */
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/*
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* Architecture of dumped system
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*/
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enum df_s390_arch {
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DF_S390_ARCH_32 = 1,
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DF_S390_ARCH_64 = 2,
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};
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/*
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* zipl parameters passed at tail of dump tools
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*/
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struct stage2dump_parm_tail {
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char reserved[6];
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uint8_t no_compress;
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uint8_t mvdump_force;
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uint64_t mem_upper_limit;
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} __packed;
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/*
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* s390 dump header format
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*/
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struct df_s390_hdr {
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uint64_t magic; /* 0x000 */
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uint32_t version; /* 0x008 */
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uint32_t hdr_size; /* 0x00c */
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uint32_t dump_level; /* 0x010 */
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uint32_t page_size; /* 0x014 */
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uint64_t mem_size; /* 0x018 */
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uint64_t mem_start; /* 0x020 */
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uint64_t mem_end; /* 0x028 */
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uint32_t num_pages; /* 0x030 */
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uint32_t pad; /* 0x034 */
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uint64_t tod; /* 0x038 */
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uint64_t cpu_id; /* 0x040 */
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uint32_t arch; /* 0x048 */
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uint32_t volnr; /* 0x04c */
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uint32_t build_arch; /* 0x050 */
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uint64_t mem_size_real; /* 0x054 */
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uint8_t mvdump; /* 0x05c */
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uint16_t cpu_cnt; /* 0x05d */
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uint16_t real_cpu_cnt; /* 0x05f */
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uint8_t zlib_version_s390; /* 0x061 */
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uint32_t zlib_entry_size; /* 0x062 */
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uint8_t end_pad1[0x200 - 0x066]; /* 0x066 */
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uint64_t mvdump_sign; /* 0x200 */
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uint64_t mvdump_zipl_time; /* 0x208 */
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uint8_t end_pad2[0x800 - 0x210]; /* 0x210 */
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uint32_t lc_vec[DF_S390_CPU_MAX]; /* 0x800 */
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} __packed __aligned(16);
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/*
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* End marker: Should be at the end of every valid s390 crash dump
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*/
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struct df_s390_em {
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union {
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uint64_t magic;
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char str[8];
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};
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uint64_t tod;
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} __packed __aligned(16);
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/*
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* Dump segment header
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*/
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struct df_s390_dump_segm_hdr {
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union {
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struct {
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uint64_t start; /* 0x000 */
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uint64_t len; /* 0x008 */
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uint64_t stop_marker; /* 0x010 */
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/* Size in blocks of compressed dump segment written to disk */
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uint32_t size_on_disk; /* 0x018 */
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uint8_t reserved_pad[0x30 - 0x1c]; /* 0x01c */
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/*
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* Number of compressed entries in this dump segment (up to
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* 1011 entries)
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*/
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uint32_t entry_count; /* 0x030 */
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/*
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* Offsets in blocks to compressed entries written to disk
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* from the start of the dump segment.
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* High-order bit is set if the entry has been written
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* uncompressed.
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*/
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uint32_t entry_offset[]; /* 0x034 */
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} __packed;
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uint8_t padding[PAGE_SIZE];
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};
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};
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/* Data compression granularity (size of input data chunk for zlib deflate) */
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#define DUMP_SEGM_ZLIB_ENTSIZE (1 * MIB)
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/* Maximum number of compressed entries in one dump segment */
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#define DUMP_SEGM_ZLIB_MAXENTS ((sizeof(struct df_s390_dump_segm_hdr) \
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- offsetof(struct df_s390_dump_segm_hdr, entry_offset)) \
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/ sizeof(uint32_t))
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/*
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* Maximum length of compressed dump segment considering the size of
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* a single input chunk
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*/
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#define DUMP_SEGM_ZLIB_MAXLEN (DUMP_SEGM_ZLIB_MAXENTS * DUMP_SEGM_ZLIB_ENTSIZE)
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/* Bitmask to mark uncompressed chunks */
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#define DUMP_SEGM_ENTRY_UNCOMPRESSED 0x80000000
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#endif /* S390_DUMP_H */
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