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Differential D11584 Diff 31501 sys/mips/mips/minidump_machdep.c

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sys/mips/mips/minidump_machdep.c

Show First 20 Lines • Show All 46 Lines • ▼ Show 20 Lines
#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>
#include <machine/cache.h> #include <machine/cache.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)
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;
static off_t origdumplo;
/* Handle chunked writes. */ /* Handle chunked writes. */
static uint64_t counter, progress, dumpsize; static uint64_t counter, progress, dumpsize;
/* Just auxiliary bufffer */ /* Just auxiliary bufffer */
static char tmpbuffer[PAGE_SIZE]; static char tmpbuffer[PAGE_SIZE];
extern pd_entry_t *kernel_segmap; extern pd_entry_t *kernel_segmap;
▲ Show 20 Lines • Show All 161 Lines • ▼ Show 20 Lines for (pa = 0; pa < phys_avail[0]; pa += PAGE_SIZE) {
if (is_dumpable(pa)) if (is_dumpable(pa))
dump_add_page(pa); dump_add_page(pa);
} }
/* Calculate dump size. */ /* Calculate dump size. */
dumpsize = ptesize; dumpsize = ptesize;
dumpsize += round_page(msgbufp->msg_size); dumpsize += round_page(msgbufp->msg_size);
dumpsize += round_page(vm_page_dump_size); dumpsize += round_page(vm_page_dump_size);
for (i = 0; i < vm_page_dump_size / sizeof(*vm_page_dump); i++) { for (i = 0; i < vm_page_dump_size / sizeof(*vm_page_dump); i++) {
bits = vm_page_dump[i]; bits = vm_page_dump[i];
while (bits) { while (bits) {
bit = ffs(bits) - 1; bit = ffs(bits) - 1;
pa = (((uint64_t)i * sizeof(*vm_page_dump) * NBBY) + pa = (((uint64_t)i * sizeof(*vm_page_dump) * NBBY) +
bit) * PAGE_SIZE; bit) * PAGE_SIZE;
/* Clear out undumpable pages now if needed */ /* Clear out undumpable pages now if needed */
if (is_dumpable(pa)) if (is_dumpable(pa))
dumpsize += PAGE_SIZE; dumpsize += PAGE_SIZE;
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;
}
origdumplo = 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 = VM_MIN_KERNEL_ADDRESS; mdhdr.kernbase = VM_MIN_KERNEL_ADDRESS;
mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_MIPS_VERSION, dumpsize, mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_MIPS_VERSION, dumpsize,
kerneldumpcrypto_dumpkeysize(di->kdc), di->blocksize); kerneldumpcrypto_dumpkeysize(di->kdc), di->blocksize);
printf("Dumping %llu out of %ju MB:", (long long)dumpsize >> 20, printf("Dumping %llu out of %ju MB:", (long long)dumpsize >> 20,
ptoa((uintmax_t)physmem) / 1048576); ptoa((uintmax_t)physmem) / 1048576);
/* 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(tmpbuffer, sizeof(tmpbuffer)); bzero(tmpbuffer, sizeof(tmpbuffer));
bcopy(&mdhdr, tmpbuffer, sizeof(mdhdr)); bcopy(&mdhdr, tmpbuffer, sizeof(mdhdr));
error = write_buffer(di, tmpbuffer, PAGE_SIZE); error = write_buffer(di, tmpbuffer, PAGE_SIZE);
if (error) if (error)
goto fail; goto fail;
/* Dump msgbuf up front */ /* Dump msgbuf up front */
Show All 10 Linesminidumpsys(struct dumperinfo *di)
/* Dump kernel page table pages */ /* Dump kernel page table pages */
for (va = VM_MIN_KERNEL_ADDRESS; va < kernel_vm_end; va += NBPDR) { for (va = VM_MIN_KERNEL_ADDRESS; va < kernel_vm_end; va += NBPDR) {
pte = pmap_pte(kernel_pmap, va); pte = pmap_pte(kernel_pmap, va);
KASSERT(pte != NULL, ("pte for %jx is NULL", (uintmax_t)va)); KASSERT(pte != NULL, ("pte for %jx is NULL", (uintmax_t)va));
if (!count) { if (!count) {
prev_pte = (vm_offset_t)pte; prev_pte = (vm_offset_t)pte;
count++; count++;
} } else {
else {
if ((vm_offset_t)pte == (prev_pte + count * PAGE_SIZE)) if ((vm_offset_t)pte == (prev_pte + count * PAGE_SIZE))
count++; count++;
else { else {
error = write_buffer(di, (char*)prev_pte, error = write_buffer(di, (char*)prev_pte,
count * PAGE_SIZE); count * PAGE_SIZE);
if (error) if (error)
goto fail; goto fail;
count = 1; count = 1;
Show All 21 Lines while (bits) {
error = write_buffer(di, dump_va, PAGE_SIZE); error = write_buffer(di, dump_va, PAGE_SIZE);
if (error) if (error)
goto fail; goto fail;
pmap_kenter_temporary_free(pa); pmap_kenter_temporary_free(pa);
bits &= ~(1ul << bit); bits &= ~(1ul << bit);
} }
} }
/* 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);
} }