/*
* Read an array of N counters in kernel memory into array of N uint64_t's.
*/
int
kread_counters(u_long addr, void *buf, size_t size)
{
uint64_t *c;
u_long *counters;
size_t i, n;
if (kvmd_init() < 0)
return (-1);
if (size % sizeof(uint64_t) != 0) {
xo_warnx("kread_counters: invalid counter set size");
return (-1);
}
n = size / sizeof(uint64_t);
if ((counters = malloc(n * sizeof(u_long))) == NULL)
xo_err(-1, "malloc");
if (kread(addr, counters, n * sizeof(u_long)) < 0) {
free(counters);
return (-1);
}
c = buf;
for (i = 0; i < n; i++)
c[i] = kvm_counter_u64_fetch(kvmd, counters[i]);
free(counters);
return (0);
}
/*
* Read single counter(9).
*/
uint64_t
kread_counter(u_long addr)
{
if (kvmd_init() < 0)
return (-1);
return (kvm_counter_u64_fetch(kvmd, addr));
}
/*
* Read an array of N counters in kernel memory into array of N uint64_t's.
*/
int
kread_counters(u_long *addr, uint64_t *rval, size_t count)
{
if (kvmd_init() < 0)
return (-1);
for (u_int i = 0; i < count; i++, addr++, rval++)
*rval = kvm_counter_u64_fetch(kvmd, *addr);
return (0);
}
/*
* Wrapper of kvm_dpcpu_setcpu().
*/
void
kset_dpcpu(u_int cpuid)
{
if ((kvmd == NULL) && (kvmd_init() != 0))
xo_errx(-1, "%s: kvm is not available", __func__);
if (kvm_dpcpu_setcpu(kvmd, cpuid) < 0)
xo_errx(-1, "%s: kvm_dpcpu_setcpu(%u): %s", __func__,
cpuid, kvm_geterr(kvmd));
return;
}
/*
* Read kernel memory, return 0 on success.
*/
int
kread(u_long addr, void *buf, size_t size)
{
if (kvmd_init() < 0)
return (-1);
if (!buf)
return (0);
if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) {
warnx("%s", kvm_geterr(kvmd));
return (-1);
}
return (0);
}
/*
* Read an array of N counters in kernel memory into array of N uint64_t's.
*/
int
kread_counters(u_long addr, void *buf, size_t size)
{
uint64_t *c = buf;
if (kvmd_init() < 0)
return (-1);
if (kread(addr, buf, size) < 0)
return (-1);
while (size != 0) {
*c = kvm_counter_u64_fetch(kvmd, *c);
size -= sizeof(*c);
c++;
}
return (0);
}
/*
* Resolve symbol list, return 0 on success.
*/
int
kresolve_list(struct nlist *_nl)
{
if ((kvmd == NULL) && (kvmd_init() != 0))
return (-1);
if (_nl[0].n_type != 0)
return (0);
if (kvm_nlist(kvmd, _nl) < 0) {
if (nlistf)
errx(1, "%s: kvm_nlist: %s", nlistf,
kvm_geterr(kvmd));
else
errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
}
return (0);
}
