elf_xlate(3E) (ELF Library) elf_xlate(3E)
NAME
elfxlate: elf32xlatetof, elf32xlatetom - class-dependent data
translation
SYNOPSIS
cc [flag ...] file ... -lelf [library ...]
#include <libelf.h>
ElfData *elf32xlatetof(ElfData *dst, const ElfData *src,
unsigned encode);
ElfData *elf32xlatetom(ElfData *dst, const ElfData *src,
unsigned encode);
DESCRIPTION
elf32xlatetom translates various data structures from their 32-bit
class file representations to their memory representations;
elf32xlatetof provides 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
eident[EIDATA] entry [see elfgetident(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, etc.
elfgetdata(3E) describes the ElfData descriptor, which the
translation routines use as follows.
dbuf Both the source and destination must have valid buffer
pointers.
dtype This member's value specifies the type of the data to
which dbuf points and the type of data to be created
in the destination. The program supplies a dtype
value in the source; the library sets the destination's
dtype to the same value. These values are summarized
below.
dsize 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 dsize member to the actual size
required, after the translation occurs. The source and
destination sizes may differ.
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elf_xlate(3E) (ELF Library) elf_xlate(3E)
dversion 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->dbuf may equal src->dbuf. Other cases
where the source and destination buffers overlap give undefined
behavior.
ElfType 32-Bit Memory Type
___________|____________________
ELFTADDR | Elf32Addr
ELFTBYTE | unsigned char
ELFTDYN | Elf32Dyn
ELFTEHDR | Elf32Ehdr
ELFTHALF | Elf32Half
ELTTOFF | Elf32Off
ELFTPHDR | Elf32Phdr
ELFTREL | Elf32Rel
ELFTRELA | Elf32Rela
ELFTSHDR | Elf32Shdr
ELFTSWORD| Elf32Sword
ELFTSYM | Elf32Sym
ELFTWORD | Elf32Word
___________|____________________
``Translating'' buffers of type ELFTBYTE does not change the byte
order.
SEE ALSO
elf(3E), elffsize(3E), elfgetdata(3E), elfgetident(3E).
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