elf_getarsym3

Usage

Library

library “libelf”

Overview

The function elf_getarsym() retrieves the symbol table for an ar(1) archive, if one is available.

Argument elf should be a descriptor for an ar(1) archive opened using elf_begin() or elf_memory().

If the archive elf contains a symbol table with n entries, this function returns a pointer to an array of n+1 Elf_Arsym structures. An Elf_Arsym structure has the following elements:

char * as_name

This structure member is a pointer to a null-terminated symbol name.

off_t as_off

This structure member contains the byte offset from the beginning of the archive to the header for the archive member. This value is suitable for use with elf_rand(3).

unsigned long as_hash

This structure member contains a portable hash value for the symbol name, as computed by elf_hash(3).

The last entry of the returned array will have a NULL value for member as_name, a zero value for member as_off and an illegal value of ~0UL for as_hash.

If argument ptr is non-null, the elf_getarsym() function will store the number of table entries returned (including the sentinel entry at the end) into the location it points to.

Return values

Function elf_getarsym() returns a pointer to an array of Elf_Arsym structures if successful, or a NULL pointer if an error was encountered.

If argument ptr is non-null and there was no error, the library will store the number of archive symbol entries returned into the location it points to. If argument ptr is non-null and an error was encountered, the library will set the location pointed to by it to zero.

Errors

Function elf_getarsym() may fail with the following errors:

[ELF_E_ARGUMENT]

Argument elf was NULL.

[ELF_E_ARGUMENT]

Argument elf was not a descriptor for an ar(1) archive.