NLIST(3ELF)NLIST(3ELF)NAMEnlist - get entries from name list
SYNOPSIS
cc [ flag... ] file ... -lelf [ library ... ]
#include <nlist.h>
int nlist(const char *filename, struct nlist *nl);
DESCRIPTIONnlist() examines the name list in the executable file whose name is
pointed to by filename, and selectively extracts a list of values and
puts them in the array of nlist() structures pointed to by nl. The name
list nl consists of an array of structures containing names of vari‐
ables, types, and values. The list is terminated with a null name, that
is, a null string is in the name position of the structure. Each vari‐
able name is looked up in the name list of the file. If the name is
found, the type, value, storage class, and section number of the name
are inserted in the other fields. The type field may be set to 0 if
the file was not compiled with the -g option to cc.
nlist() will always return the information for an external symbol of a
given name if the name exists in the file. If an external symbol does
not exist, and there is more than one symbol with the specified name
in the file (such as static symbols defined in separate files), the
values returned will be for the last occurrence of that name in the
file. If the name is not found, all fields in the structure except
n_name are set to 0.
This function is useful for examining the system name list kept in the
file /dev/ksyms. In this way programs can obtain system addresses that
are up to date.
RETURN VALUES
All value entries are set to 0 if the file cannot be read or if it does
not contain a valid name list.
nlist() returns 0 on success, −1 on error.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│Interface Stability │ Stable │
├────────────────────┼─────────────────┤
│MT-Level │ Safe │
└────────────────────┴─────────────────┘
SEE ALSOelf(3ELF), kvm_nlist(3KVM), kvm_open(3KVM), libelf(3LIB), a.out(4),
attributes(5), ksyms(7D), mem(7D)
Jul 11, 2001 NLIST(3ELF)
