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Man Pages


Manual Reference Pages  -  GELF_GETREL (3)

NAME

gelf_getrel, gelf_update_rel - read and update ELF relocation entries

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also

LIBRARY


.Lb libelf

SYNOPSIS


.In gelf.h GElf_Rel * gelf_getrel Elf_Data *data int ndx GElf_Rel *rel int gelf_update_rel Elf_Data *data int ndx GElf_Rel *rel

DESCRIPTION

These convenience functions are used to retrieve and update class-dependent
.Vt Elf32_Rel or
.Vt Elf64_Rel structures in an ELF object.

Argument data is an
.Vt Elf_Data descriptor associated with a section of type SHT_REL. Argument ndx is the index of the entry being retrieved or updated. The class-independent
.Vt GElf_Rel structure is described in gelf(3).

Function gelf_getrel retrieves the class-dependent entry at index ndx in data buffer data and copies it to the destination pointed to by argument rel after translation to class-independent form.

Function gelf_update_rel converts the class-independent entry pointed to by argument rel to class-dependent form, and writes it to the entry at index ndx in the data buffer described by argument data. Function gelf_update_rel signals an error if any of the values in the class-independent representation exceeds the representable limits of the target type.

RETURN VALUES

Function gelf_getrel returns the value of argument rel if successful, or NULL in case of an error. Function gelf_update_rel returns a non-zero value if successful, or zero in case of an error.

ERRORS

These functions may fail with the following errors:
[ELF_E_ARGUMENT] Arguments data or rel were NULL.
[ELF_E_ARGUMENT] Argument ndx was less than zero or larger than the number of entries in the data descriptor.
[ELF_E_ARGUMENT] Data descriptor data was not associated with a section of type SHT_REL.
[ELF_E_RANGE] A value was not representable in the target type.

SEE ALSO

elf(3), elf_getdata(3), elf_getscn(3), gelf(3)
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