/* Create a suited redolog header */
void make_redolog_header(redolog_header_t *header, const char* type, Bit64u size)
{
Bit32u entries, extent_size, bitmap_size;
Bit64u maxsize;
// Set standard header values
strcpy((char*)header->standard.magic, STANDARD_HEADER_MAGIC);
strcpy((char*)header->standard.type, REDOLOG_TYPE);
strcpy((char*)header->standard.subtype, type);
header->standard.version = htod32(STANDARD_HEADER_VERSION);
header->standard.header = htod32(STANDARD_HEADER_SIZE);
entries = 512;
bitmap_size = 1;
// Compute #entries and extent size values
do {
static Bit32u flip=0;
extent_size = 8 * bitmap_size * 512;
header->specific.catalog = htod32(entries);
header->specific.bitmap = htod32(bitmap_size);
header->specific.extent = htod32(extent_size);
maxsize = (Bit64u)entries * (Bit64u)extent_size;
flip++;
if(flip&0x01) bitmap_size *= 2;
else entries *= 2;
} while (maxsize < size);
header->specific.disk = htod64(size);
}
void
mkdumpheader(struct kerneldumpheader *kdh, char *magic, uint32_t archver,
uint64_t dumplen, uint32_t blksz)
{
bzero(kdh, sizeof(*kdh));
strncpy(kdh->magic, magic, sizeof(kdh->magic));
strncpy(kdh->architecture, MACHINE_ARCH, sizeof(kdh->architecture));
kdh->version = htod32(KERNELDUMPVERSION);
kdh->architectureversion = htod32(archver);
kdh->dumplength = htod64(dumplen);
kdh->dumptime = htod64(time_second);
kdh->blocksize = htod32(blksz);
strncpy(kdh->hostname, hostname, sizeof(kdh->hostname));
strncpy(kdh->versionstring, version, sizeof(kdh->versionstring));
if (panicstr != NULL)
strncpy(kdh->panicstring, panicstr, sizeof(kdh->panicstring));
kdh->parity = kerneldump_parity(kdh);
}
void
dumpsys(struct dumperinfo *di)
{
off_t dumplo;
vm_offset_t a, addr;
u_int count, left, u;
void *va;
int i, mb;
printf("Dumping %ld MB\n", Maxmem / (1024*1024 / PAGE_SIZE));
/* Fill in the kernel dump header */
strcpy(kdh.magic, KERNELDUMPMAGIC);
strcpy(kdh.architecture, "alpha");
kdh.version = htod32(KERNELDUMPVERSION);
kdh.architectureversion = htod32(KERNELDUMP_ALPHA_VERSION);
kdh.dumplength = htod64(Maxmem * (off_t)PAGE_SIZE);
kdh.dumptime = htod64(time_second);
kdh.blocksize = htod32(di->blocksize);
strncpy(kdh.hostname, hostname, sizeof kdh.hostname);
strncpy(kdh.versionstring, version, sizeof kdh.versionstring);
if (panicstr != NULL)
strncpy(kdh.panicstring, panicstr, sizeof kdh.panicstring);
kdh.parity = kerneldump_parity(&kdh);
/*
* Check if we will have enough room to save the coredump.
* The partition size needed is the sum of:
* Memory to save + header + trailer + Room to leave untouched
* at partition head. (an arbitrary amount).
*/
if (di->mediasize <
Maxmem * (off_t)PAGE_SIZE + sizeof kdh * 2 + 64*1024) {
printf("\nDump failed. Partition too small.\n");
return;
}
dumplo = di->mediaoffset + di->mediasize - Maxmem * (off_t)PAGE_SIZE;
dumplo -= sizeof kdh * 2;
i = di->dumper(di->priv, &kdh, NULL, dumplo, sizeof kdh);
if (i)
printf("\nDump failed writing header (%d)\n", i);
dumplo += sizeof kdh;
i = 0;
addr = 0;
va = 0;
mb = 0;
for (count = 0; count < Maxmem;) {
left = Maxmem - count;
if (left > MAXDUMPPGS)
left = MAXDUMPPGS;
for (u = 0; u < left; u++) {
a = addr + u * PAGE_SIZE;
if (!is_physical_memory(a))
a = 0;
va = pmap_kenter_temporary(trunc_page(a), u);
}
i = count / (16*1024*1024 / PAGE_SIZE);
if (i != mb) {
printf(" %d", count / (1024 * 1024 / PAGE_SIZE));
mb = i;
}
i = di->dumper(di->priv, va, NULL, dumplo, left * PAGE_SIZE);
if (i)
break;
count += left;
dumplo += left * PAGE_SIZE;
addr += left * PAGE_SIZE;
}
if (i)
printf("\nDump failed writing data (%d)\n", i);
i = di->dumper(di->priv, &kdh, NULL, dumplo, sizeof kdh);
if (i)
printf("\nDump failed writing trailer (%d)\n", i);
di->dumper(di->priv, NULL, NULL, 0, 0); /* tell them we are done */
printf("\nDump complete\n");
return;
}
