HP-UX Reference (11i v2 07/12) - 3 Library Functions A-M (vol 6)

e
elf_xlate(3E) elf_xlate(3E)
NAME
elf32_xlatetof, elf32_xlatetom, elf64_xlatetof, elf64_xlatetom - class-dependent data translation for elf32 and
elf64 files, respectively
SYNOPSIS
cc [flag... ] file...
-lelf [library] ...
#include <libelf.h>
Elf_Data *elf32_xlatetof(Elf_Data *dst, const Elf_Data *src,
unsigned encode);
Elf_Data *elf32_xlatetom(Elf_Data *dst, const Elf_Data *src,
unsigned encode);
Elf_Data *elf64_xlatetof(Elf_Data *dst, const Elf_Data *src,
unsigned encode);
Elf_Data *elf64_xlatetom(Elf_Data *dst, const Elf_Data *src,
unsigned encode);
DESCRIPTION
elf32_xlatetom translates various data structures from their 32-bit class file representations to their
memory representations;
elf64_xlatetom translates various data structures from their 64-bit class file
representations to their memory representations;
elf32_xlatetof and elf64_xlatetof
provide
the inverse. This conversion is particularly important for cross development environments. src is a pointer
to the source buffer that holds the original data; dst is a pointer to a destination buffer that will hold the
translated copy. encode gives the byte encoding in which the file objects are (to be) represented and must
have one of the encoding values defined for the ELF header’s
e_ident[EI_DATA] entry (see
elf_getident(3E)). If the data can be translated, the functions return dst. Otherwise, they return null
because an error occurred, such as incompatible types, destination buffer overflow, and so forth.
elf_getdata(3E) describes the Elf_Data descriptor, which the translation routines use as follows.
d_buf Both the source and destination must have valid buffer pointers.
d_type This member’s value specifies the type of the data to which
d_buf points and the
type of data to be created in the destination. The program supplies a
d_type value
in the source; the library sets the destination’s
d_type to the same value. These
values are summarized below.
d_size This member holds the total size, in bytes, of the memory occupied by the source data
and the size allocated for the destination data. If the destination buffer is not large
enough, the routines do not change its original contents. The translation routines
reset the destination’s
d_size
member to the actual size required, after the transla-
tion occurs. The source and destination sizes may differ.
d_version This member holds version number of the objects (desired) in the buffer. The source
and destination versions are independent.
Translation routines allow the source and destination buffers to coincide. That is,
dst->d_buf may
equal
src->d_buf . Other cases where the source and destination buffers overlap give undefined
behavior.
HP-UX 11i Version 2: December 2007 Update − 1 − Hewlett-Packard Company 373