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FreeBSD 11.0 - man page for kvm_nlist (freebsd section 3)

KVM_NLIST(3)						   BSD Library Functions Manual 					      KVM_NLIST(3)

kvm_nlist -- retrieve symbol table names from a kernel image
Kernel Data Access Library (libkvm, -lkvm)
#include <kvm.h> #include <nlist.h> int kvm_nlist(kvm_t *kd, struct nlist *nl);
The kvm_nlist() function retrieves the symbol table entries indicated by the name list argument nl. This argument points to an array of nlist structures, terminated by an entry whose n_name field is NULL (see nlist(3)). Each symbol is looked up using the n_name field, and if found, the corresponding n_type and n_value fields are filled in. These fields are set to 0 if the symbol is not found. The kldsym(2) system call is used to locate the symbol. This is a less than perfect emulation of the nlist values but has the advantage of being aware of kernel modules and is reasonably fast.
The kvm_nlist() function returns the number of invalid entries found. If the kernel symbol table was unreadable, -1 is returned.
kldsym(2), kvm(3), kvm_close(3), kvm_getargv(3), kvm_getenvv(3), kvm_geterr(3), kvm_getprocs(3), kvm_open(3), kvm_openfiles(3), kvm_read(3), kvm_write(3)
June 4, 1993 BSD

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