kvm_open
kvm_f = kvm_open(kern, core, NULL, O_RDONLY, NULL);
kvm_t kvm_open __P((char *, char *, char *, int, char *));
.kb_open = (void *(*)())kvm_open,
if ((cookie = kvm_open(namelist, corefile,
extern kvm_t *kvm_open(const char *, const char *, const char *,
extern kvm_t *kvm_open();