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 translation 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.
For elf32 files:
For elf64 files:
``Translating'' buffers of type
ELF_T_BYTE
does not change the byte order.
Printable version
