Page MenuHomeFreeBSD
Differential D11584 Diff 31501 sys/i386/i386/minidump_machdep.c

Changeset View

Standalone View

View Options

sys/i386/i386/minidump_machdep.c

Show First 20 Lines • Show All 41 Lines • ▼ Show 20 Lines
#include <machine/atomic.h> #include <machine/atomic.h>
#include <machine/elf.h> #include <machine/elf.h>
#include <machine/md_var.h> #include <machine/md_var.h>
#include <machine/vmparam.h> #include <machine/vmparam.h>
#include <machine/minidump.h> #include <machine/minidump.h>
CTASSERT(sizeof(struct kerneldumpheader) == 512); CTASSERT(sizeof(struct kerneldumpheader) == 512);
/*
* Don't touch the first SIZEOF_METADATA bytes on the dump device. This
* is to protect us from metadata and to protect metadata from us.
*/
#define SIZEOF_METADATA (64*1024)
#define MD_ALIGN(x) (((off_t)(x) + PAGE_MASK) & ~PAGE_MASK) #define MD_ALIGN(x) (((off_t)(x) + PAGE_MASK) & ~PAGE_MASK)
#define DEV_ALIGN(x) roundup2((off_t)(x), DEV_BSIZE) #define DEV_ALIGN(x) roundup2((off_t)(x), DEV_BSIZE)
uint32_t *vm_page_dump; uint32_t *vm_page_dump;
int vm_page_dump_size; int vm_page_dump_size;
static struct kerneldumpheader kdh; static struct kerneldumpheader kdh;
static off_t dumplo; static off_t dumplo;
▲ Show 20 Lines • Show All 175 Lines • ▼ Show 20 Lines while (bits) {
} else { } else {
dump_drop_page(pa); dump_drop_page(pa);
} }
bits &= ~(1ul << bit); bits &= ~(1ul << bit);
} }
} }
dumpsize += PAGE_SIZE; dumpsize += PAGE_SIZE;
/* Determine dump offset on device. */
if (di->mediasize < SIZEOF_METADATA + dumpsize + di->blocksize * 2 +
kerneldumpcrypto_dumpkeysize(di->kdc)) {
error = ENOSPC;
goto fail;
}
dumplo = di->mediaoffset + di->mediasize - dumpsize;
dumplo -= di->blocksize * 2;
dumplo -= kerneldumpcrypto_dumpkeysize(di->kdc);
progress = dumpsize; progress = dumpsize;
/* Initialize kernel dump crypto. */
error = kerneldumpcrypto_init(di->kdc);
if (error)
goto fail;
/* Initialize mdhdr */ /* Initialize mdhdr */
bzero(&mdhdr, sizeof(mdhdr)); bzero(&mdhdr, sizeof(mdhdr));
strcpy(mdhdr.magic, MINIDUMP_MAGIC); strcpy(mdhdr.magic, MINIDUMP_MAGIC);
mdhdr.version = MINIDUMP_VERSION; mdhdr.version = MINIDUMP_VERSION;
mdhdr.msgbufsize = msgbufp->msg_size; mdhdr.msgbufsize = msgbufp->msg_size;
mdhdr.bitmapsize = vm_page_dump_size; mdhdr.bitmapsize = vm_page_dump_size;
mdhdr.ptesize = ptesize; mdhdr.ptesize = ptesize;
mdhdr.kernbase = KERNBASE; mdhdr.kernbase = KERNBASE;
#if defined(PAE) || defined(PAE_TABLES) #if defined(PAE) || defined(PAE_TABLES)
mdhdr.paemode = 1; mdhdr.paemode = 1;
#endif #endif
mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_I386_VERSION, dumpsize, mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_I386_VERSION, dumpsize,
kerneldumpcrypto_dumpkeysize(di->kdc), di->blocksize); kerneldumpcrypto_dumpkeysize(di->kdc), di->blocksize);
printf("Physical memory: %ju MB\n", ptoa((uintmax_t)physmem) / 1048576); printf("Physical memory: %ju MB\n", ptoa((uintmax_t)physmem) / 1048576);
printf("Dumping %llu MB:", (long long)dumpsize >> 20); printf("Dumping %llu MB:", (long long)dumpsize >> 20);
/* Dump leader */ error = dump_start(di, &kdh, &dumplo);
error = dump_write_header(di, &kdh, 0, dumplo); if (error != 0)
if (error)
goto fail; goto fail;
dumplo += di->blocksize;
/* Dump key */
error = dump_write_key(di, 0, dumplo);
if (error)
goto fail;
dumplo += kerneldumpcrypto_dumpkeysize(di->kdc);
/* Dump my header */ /* Dump my header */
bzero(&fakept, sizeof(fakept)); bzero(&fakept, sizeof(fakept));
bcopy(&mdhdr, &fakept, sizeof(mdhdr)); bcopy(&mdhdr, &fakept, sizeof(mdhdr));
error = blk_write(di, (char *)&fakept, 0, PAGE_SIZE); error = blk_write(di, (char *)&fakept, 0, PAGE_SIZE);
if (error) if (error)
goto fail; goto fail;
/* Dump msgbuf up front */ /* Dump msgbuf up front */
▲ Show 20 Lines • Show All 56 Lines • ▼ Show 20 Lines while (bits) {
bits &= ~(1ul << bit); bits &= ~(1ul << bit);
} }
} }
error = blk_flush(di); error = blk_flush(di);
if (error) if (error)
goto fail; goto fail;
/* Dump trailer */ error = dump_finish(di, &kdh, dumplo);
error = dump_write_header(di, &kdh, 0, dumplo); if (error != 0)
if (error)
goto fail; goto fail;
dumplo += di->blocksize;
/* Signal completion, signoff and exit stage left. */
dump_write(di, NULL, 0, 0, 0);
printf("\nDump complete\n"); printf("\nDump complete\n");
return (0); return (0);
fail: fail:
if (error < 0) if (error < 0)
error = -error; error = -error;
if (error == ECANCELED) if (error == ECANCELED)
printf("\nDump aborted\n"); printf("\nDump aborted\n");
else if (error == ENOSPC) else if (error == E2BIG)
printf("\nDump failed. Partition too small.\n"); printf("\nDump failed. Partition too small.\n");
else else
printf("\n** DUMP FAILED (ERROR %d) **\n", error); printf("\n** DUMP FAILED (ERROR %d) **\n", error);
return (error); return (error);
} }
void void
dump_add_page(vm_paddr_t pa) dump_add_page(vm_paddr_t pa)
Show All 20 Lines