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
[flag... ] file... [library] ...
DESCRIPTION
translates various data structures from their 32-bit class file repre‐
sentations to their memory representations; translates various data
structures from their 64-bit class file representations to their memory
representations; and provide the inverse. This conversion is particu‐
larly 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 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 transla‐
tion routines use as follows.
Both the source and destination must have valid buffer pointers.
This member's value specifies the type of the
data to which points and the type of data to be
created in the destination. The program supplies
a value in the source; the library sets the des‐
tination's to the same value. These values are
summarized below.
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 rou‐
tines do not change its original contents. The
translation routines reset the destination's mem‐
ber to the actual size required, after the trans‐
lation occurs. The source and destination sizes
may differ.
This member holds version number of the objects
(desired) in the buffer. The source and destina‐
tion versions are independent.
Translation routines allow the source and destination buffers to coin‐
cide. That is, may equal Other cases where the source and destination
buffers overlap give undefined behavior.
For elf32 files:
Elf_Type 32-Bit Memory Type
─────────────────────────────────
ELF_T_ADDR Elf32_Addr
ELF_T_BYTE unsigned char
ELF_T_DYN Elf32_Dyn
ELF_T_EHDR Elf32_Ehdr
ELF_T_HALF Elf32_Half
ELT_T_OFF Elf32_Off
ELF_T_PHDR Elf32_Phdr
ELF_T_REL Elf32_Rel
ELF_T_RELA Elf32_Rela
ELF_T_SHDR Elf32_Shdr
ELF_T_SWORD Elf32_Sword
ELF_T_SYM Elf32_Sym
ELF_T_WORD Elf32_Word
For elf64 files:
Elf_Type 64-Bit Memory Type
─────────────────────────────────
ELF_T_ADDR Elf64_Addr
ELF_T_BYTE unsigned char
ELF_T_DYN Elf64_Dyn
ELF_T_EHDR Elf64_Ehdr
ELF_T_HALF Elf64_Half
ELT_T_OFF Elf64_Off
ELF_T_PHDR Elf64_Phdr
ELF_T_REL Elf64_Rel
ELF_T_RELA Elf64_Rela
ELF_T_SHDR Elf64_Shdr
ELF_T_SWORD Elf64_Sword
ELF_T_SYM Elf64_Sym
ELF_T_WORD Elf64_Word
``Translating'' buffers of type does not change the byte order.
SEE ALSOelf(3E), elf_fsize(3E), elf_getdata(3E), elf_getident(3E).
elf_xlate(3E)