NAME

elf32_newphdr, elf64_newphdr, gelf_newphdr —

allocate an ELF program header table

LIBRARY

ELF Access Library (libelf, -lelf)

SYNOPSIS

#include <libelf.h>

Elf32_Phdr *
elf32_newphdr(Elf *elf, size_t count);

Elf64_Phdr *
elf64_newphdr(Elf *elf, size_t count);

#include <gelf.h>

void *
gelf_newphdr(Elf *elf, size_t count);

DESCRIPTION

These functions allocate an ELF Program Header table for an ELF descriptor. Elf32_Phdr and Elf64_Phdr descriptors are described further in elf(5).

Functions elf32_newphdr() and elf64_newphdr() allocate a table of count Elf32_Phdr and Elf64_Phdr descriptors respectively, discarding any existing program header table already present in the ELF descriptor elf. A value of zero for argument count may be used to delete an existing program header table from an ELF descriptor.

Function gelf_newphdr() will return a table of Elf32_Phdr or Elf64_Phdr with count elements depending on the ELF class of ELF descriptor elf.

The functions set the ELF_F_DIRTY flag on the program header table. All members of the returned array of Phdr structures will be initialized to zero.

After a successful call to these functions, the pointer returned by a prior call to elf32_getphdr() or elf64_getphdr() on the same descriptor elf will no longer be valid.

RETURN VALUES

The functions a valid pointer if successful, or NULL in case an error was encountered.

COMPATIBILITY

The gelf_newphdr() function uses a type of void * for its returned value. This differs from some other implementations of the elf(3) API, which use an unsigned long return type.

ERRORS

These functions may fail with the following errors:

[ELF_E_ARGUMENT]: Argument elf was NULL.
[ELF_E_ARGUMENT]: Argument elf was not a descriptor for an ELF object.
[ELF_E_CLASS]: ELF descriptor elf was of an unrecognized class.
[ELF_E_RESOURCE]: An out of memory condition was detected.
[ELF_E_SEQUENCE]: An executable header was not allocated for ELF descriptor elf before using these APIs.