elf_xlate(3elf)


elf_xlate: elf32_xlatetof, elf32_xlatetom -- class-dependent data translation

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);

Description

elf32_xlatetom translates various data structures from their 32-bit class file representations to their memory representations; elf32_xlatetof 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 e_ident[EI_DATA] entry [see elf_getident(3elf)]. 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(3elf) describes the Elf_Data descriptor, which the translation routines use as follows.

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.


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

 
 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 

``Translating'' buffers of type ELF_T_BYTE does not change the byte order.

References

Intro(3elf), elf_fsize(3elf), elf_getdata(3elf), elf_getident(3elf)
30 January 1998
© 1998 The Santa Cruz Operation, Inc. All rights reserved.