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f37df7df8a
Without the patch, the following gcc-11 compiler warning is emitted for
kvmdump.c:
In function 'write_mapfile_registers',
inlined from 'write_mapfile_trailer' at kvmdump.c:947:3,
inlined from 'kvmdump_init' at kvmdump.c:145:4:
kvmdump.c:972:13: warning: 'write' reading 8 bytes from a region of size 4 [-Wstringop-overread]
972 | if (write(kvm->mapfd, &kvm->cpu_devices, sizeof(uint64_t)) != sizeof(uint64_t))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from kvmdump.c:19:
kvmdump.c: In function 'kvmdump_init':
kvmdump.h:67:18: note: source object 'cpu_devices' of size 4
67 | uint32_t cpu_devices;
| ^~~~~~~~~~~
In file included from defs.h:26,
from kvmdump.c:18:
/usr/include/unistd.h:378:16: note: in a call to function 'write' declared with attribute 'access (read_only, 2, 3)'
378 | extern ssize_t write (int __fd, const void *__buf, size_t __n) __wur
| ^~~~~
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
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* kvmdump.h
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*
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* Copyright (C) 2009, 2010 David Anderson
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* Copyright (C) 2009, 2010 Red Hat, Inc. All rights reserved.
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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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struct mapinfo_trailer {
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uint64_t map_start_offset;
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uint64_t phys_base;
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uint32_t cpu_version_id;
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uint32_t ram_version_id;
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uint64_t checksum;
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uint64_t magic;
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};
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struct register_set {
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uint32_t cs;
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uint32_t ss;
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uint32_t ds;
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uint32_t es;
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uint32_t fs;
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uint32_t gs;
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uint64_t ip;
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uint64_t flags;
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uint64_t regs[16];
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};
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#define REGS_MAGIC (0xfeedbeefdeadbabeULL)
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#define MAPFILE_MAGIC (0xfeedbabedeadbeefULL)
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#define CHKSUM_SIZE (4096)
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#define KVMDUMP_CACHED_PAGES 32
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struct kvmdump_data {
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ulong flags;
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FILE *ofp;
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FILE *vmp;
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int mapfd;
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int vmfd;
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struct mapinfo_trailer mapinfo;
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/* page cache */
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struct kvm_page_cache_hdr {
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uint64_t paddr;
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char *bufptr;
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} page_cache[KVMDUMP_CACHED_PAGES];
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union {
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char *curbufptr;
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unsigned char compressed;
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} un;
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int evict_index;
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ulong accesses;
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ulong hit_count;
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ulong compresses;
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uint64_t kvbase;
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ulong *debug;
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uint64_t cpu_devices;
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struct register_set *registers;
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uint64_t iohole;
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};
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#define TMPFILE (0x2)
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#define MAPFILE (0x4)
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#define MAPFILE_FOUND (0x8)
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#define MAPFILE_APPENDED (0x10)
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#define NO_PHYS_BASE (0x20)
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#define KVMHOST_32 (0x40)
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#define KVMHOST_64 (0x80)
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#define REGS_FROM_DUMPFILE (0x100)
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#define REGS_FROM_MAPFILE (0x200)
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#define REGS_NOT_AVAIL (0x400)
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extern struct kvmdump_data *kvm;
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#undef dprintf
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#define dprintf(x...) do { if (*(kvm->debug)) fprintf(kvm->ofp, x); } while (0)
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int store_mapfile_offset(uint64_t, off_t *);
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int load_mapfile_offset(uint64_t, off_t *);
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struct qemu_device_x86;
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int kvmdump_regs_store(uint32_t, struct qemu_device_x86 *);
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#define KVMDUMP_REGS_START (NR_CPUS+1)
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#define KVMDUMP_REGS_END (NR_CPUS+2)
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#define UPPER_32_BITS (0xffffffff00000000ULL)
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enum CPU_REG {
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R_EAX,
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R_ECX,
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R_EDX,
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R_EBX,
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R_ESP,
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R_EBP,
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R_ESI,
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R_EDI,
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R_GP_MAX,
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};
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