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Differential D11584 Diff 31501 sys/kern/kern_dump.c

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sys/kern/kern_dump.c

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#include <vm/pmap.h> #include <vm/pmap.h>
#include <machine/dump.h> #include <machine/dump.h>
#include <machine/elf.h> #include <machine/elf.h>
#include <machine/md_var.h> #include <machine/md_var.h>
#include <machine/pcb.h> #include <machine/pcb.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) roundup2((off_t)(x), PAGE_SIZE) #define MD_ALIGN(x) roundup2((off_t)(x), PAGE_SIZE)
off_t dumplo; off_t dumplo;
/* Handle buffered writes. */ /* Handle buffered writes. */
static size_t fragsz; static size_t fragsz;
struct dump_pa dump_map[DUMPSYS_MD_PA_NPAIRS]; struct dump_pa dump_map[DUMPSYS_MD_PA_NPAIRS];
▲ Show 20 Lines • Show All 276 Lines • ▼ Show 20 Lines#endif
dumpsize = 0L; dumpsize = 0L;
ehdr.e_phnum = dumpsys_foreach_chunk(cb_size, &dumpsize) + ehdr.e_phnum = dumpsys_foreach_chunk(cb_size, &dumpsize) +
DUMPSYS_NUM_AUX_HDRS; DUMPSYS_NUM_AUX_HDRS;
hdrsz = ehdr.e_phoff + ehdr.e_phnum * ehdr.e_phentsize; hdrsz = ehdr.e_phoff + ehdr.e_phnum * ehdr.e_phentsize;
fileofs = MD_ALIGN(hdrsz); fileofs = MD_ALIGN(hdrsz);
dumpsize += fileofs; dumpsize += fileofs;
hdrgap = fileofs - roundup2((off_t)hdrsz, di->blocksize); hdrgap = fileofs - roundup2((off_t)hdrsz, di->blocksize);
/* 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);
/* Initialize kernel dump crypto. */
error = kerneldumpcrypto_init(di->kdc);
if (error)
goto fail;
mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_ARCH_VERSION, dumpsize, mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_ARCH_VERSION, dumpsize,
kerneldumpcrypto_dumpkeysize(di->kdc), di->blocksize); kerneldumpcrypto_dumpkeysize(di->kdc), di->blocksize);
printf("Dumping %ju MB (%d chunks)\n", (uintmax_t)dumpsize >> 20, printf("Dumping %ju MB (%d chunks)\n", (uintmax_t)dumpsize >> 20,
ehdr.e_phnum - DUMPSYS_NUM_AUX_HDRS); ehdr.e_phnum - DUMPSYS_NUM_AUX_HDRS);
/* 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 ELF header */ /* Dump ELF header */
error = dumpsys_buf_write(di, (char*)&ehdr, sizeof(ehdr)); error = dumpsys_buf_write(di, (char*)&ehdr, sizeof(ehdr));
if (error) if (error)
goto fail; goto fail;
/* Dump program headers */ /* Dump program headers */
error = dumpsys_foreach_chunk(cb_dumphdr, di); error = dumpsys_foreach_chunk(cb_dumphdr, di);
if (error < 0) if (error < 0)
Show All 14 Lines#endif
if (error) if (error)
goto fail; goto fail;
/* Dump memory chunks (updates dumplo) */ /* Dump memory chunks (updates dumplo) */
error = dumpsys_foreach_chunk(dumpsys_cb_dumpdata, di); error = dumpsys_foreach_chunk(dumpsys_cb_dumpdata, di);
if (error < 0) if (error < 0)
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);
} }
#endif #endif