Differential D27082 Diff 80269 head/lib/libkvm/kvm_private.c

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head/lib/libkvm/kvm_private.c

Show First 20 Lines • Show All 285 Lines • ▼ Show 20 Lines	_kvm_map_get(kvm_t *kd, u_long pa, unsigned int page_size)
addr = (uintptr_t)kd->page_map + off;		addr = (uintptr_t)kd->page_map + off;
if (off >= kd->pt_sparse_off)		if (off >= kd->pt_sparse_off)
addr = (uintptr_t)kd->sparse_map + (off - kd->pt_sparse_off);		addr = (uintptr_t)kd->sparse_map + (off - kd->pt_sparse_off);
return (void *)addr;		return (void *)addr;
}		}

int		int
_kvm_pt_init(kvm_t *kd, size_t dump_avail_size, off_t dump_avail_off,		_kvm_pt_init(kvm_t *kd, size_t dump_avail_size, off_t dump_avail_off,
size_t map_len, off_t map_off, off_t sparse_off, int page_size,		size_t map_len, off_t map_off, off_t sparse_off, int page_size)
int word_size)
{		{
uint64_t *addr;		uint64_t *addr;
uint32_t *popcount_bin;		uint32_t *popcount_bin;
int bin_popcounts = 0;		int bin_popcounts = 0;
uint64_t pc_bins, res;		uint64_t pc_bins, res;
ssize_t rd;		ssize_t rd;

kd->dump_avail_size = dump_avail_size;		kd->dump_avail_size = dump_avail_size;
if (dump_avail_size > 0) {		if (dump_avail_size > 0) {
kd->dump_avail = mmap(NULL, kd->dump_avail_size, PROT_READ,		kd->dump_avail = mmap(NULL, kd->dump_avail_size, PROT_READ,
MAP_PRIVATE, kd->pmfd, dump_avail_off);		MAP_PRIVATE, kd->pmfd, dump_avail_off);
} else {		} else {
/*		/*
* Older version minidumps don't provide dump_avail[],		* Older version minidumps don't provide dump_avail[],
* so the bitmap is fully populated from 0 to		* so the bitmap is fully populated from 0 to
* last_pa. Create an implied dump_avail that		* last_pa. Create an implied dump_avail that
* expresses this.		* expresses this.
*/		*/
kd->dump_avail = calloc(4, word_size);		kd->dump_avail = calloc(4, sizeof(uint64_t));
if (word_size == sizeof(uint32_t)) {		kd->dump_avail[1] = _kvm64toh(kd, map_len * 8 * page_size);
((uint32_t *)kd->dump_avail)[1] = _kvm32toh(kd,
map_len * 8 * page_size);
} else {
kd->dump_avail[1] = _kvm64toh(kd,
map_len * 8 * page_size);
}		}
}

/*		/*
* Map the bitmap specified by the arguments.		* Map the bitmap specified by the arguments.
*/		*/
kd->pt_map = _kvm_malloc(kd, map_len);		kd->pt_map = _kvm_malloc(kd, map_len);
if (kd->pt_map == NULL) {		if (kd->pt_map == NULL) {
_kvm_err(kd, kd->program, "cannot allocate %zu bytes for bitmap",		_kvm_err(kd, kd->program, "cannot allocate %zu bytes for bitmap",
map_len);		map_len);
Show All 39 Lines	_kvm_pt_init(kvm_t *kd, size_t dump_avail_size, off_t dump_avail_off,
}		}

assert(pc_bins * sizeof(*popcount_bin) ==		assert(pc_bins * sizeof(*popcount_bin) ==
((uintptr_t)popcount_bin - (uintptr_t)kd->pt_popcounts));		((uintptr_t)popcount_bin - (uintptr_t)kd->pt_popcounts));

kd->pt_sparse_off = sparse_off;		kd->pt_sparse_off = sparse_off;
kd->pt_sparse_size = (uint64_t)popcount_bin page_size;		kd->pt_sparse_size = (uint64_t)popcount_bin page_size;
kd->pt_page_size = page_size;		kd->pt_page_size = page_size;
kd->pt_word_size = word_size;

/*		/*
* Map the sparse page array. This is useful for performing point		* Map the sparse page array. This is useful for performing point
* lookups of specific pages, e.g. for kvm_walk_pages. Generally,		* lookups of specific pages, e.g. for kvm_walk_pages. Generally,
* this is much larger than is reasonable to read in up front, so		* this is much larger than is reasonable to read in up front, so
* mmap it in instead.		* mmap it in instead.
*/		*/
kd->sparse_map = mmap(NULL, kd->pt_sparse_size, PROT_READ,		kd->sparse_map = mmap(NULL, kd->pt_sparse_size, PROT_READ,
Show All 27 Lines	if (pread(kd->pmfd, kd->page_map, pmap_size, pmap_off) != exp_len) {
return (-1);		return (-1);
}		}
return (0);		return (0);
}		}

static inline uint64_t		static inline uint64_t
dump_avail_n(kvm_t *kd, long i)		dump_avail_n(kvm_t *kd, long i)
{		{
uint32_t *d32;

if (kd->pt_word_size == sizeof(uint32_t)) {
d32 = (uint32_t *)kd->dump_avail;
return (_kvm32toh(kd, d32[i]));
} else
return (_kvm64toh(kd, kd->dump_avail[i]));		return (_kvm64toh(kd, kd->dump_avail[i]));
}		}

uint64_t		uint64_t
_kvm_pa_bit_id(kvm_t *kd, uint64_t pa, unsigned int page_size)		_kvm_pa_bit_id(kvm_t *kd, uint64_t pa, unsigned int page_size)
{		{
uint64_t adj;		uint64_t adj;
long i;		long i;

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