NAME
gelf_getdyn,
gelf_update_dyn —
read and update ELF dynamic entries
LIBRARY
ELF Access Library (libelf, -lelf)
SYNOPSIS
#include <gelf.h>
GElf_Dyn *
gelf_getdyn(
Elf_Data
*data,
int ndx,
GElf_Dyn *dyn);
int
gelf_update_dyn(
Elf_Data
*data,
int ndx,
GElf_Dyn *dyn);
DESCRIPTION
These convenience functions are used to retrieve and update class-dependent
Elf32_Dyn or
Elf64_Dyn information
in the
dynamic table of an ELF object.
Argument
data is an
Elf_Data
descriptor associated with a section of type
SHT_DYNAMIC
. Argument
ndx is the
index of the entry being retrieved or updated. The class-independent
GElf_Dyn structure is described in
gelf(3).
Function
gelf_getdyn() retrieves the class-dependent entry at
index
ndx in data buffer
data and
copies it to the destination pointed to by argument
dyn
after translation to class-independent form.
Function
gelf_update_dyn() converts the class-independent
entry pointed to by argument
dyn to class-dependent
form, and writes it to the entry at index
ndx in the
data buffer described by argument
data. Function
gelf_update_dyn() 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_getdyn() returns the value of argument
dyn if successful, or NULL in case of an error. Function
gelf_update_dyn() 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
dyn 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_DYNAMIC
.
-
-
- [
ELF_E_RANGE
]
- A value was not representable in the target type.
SEE ALSO
elf(3),
elf_getdata(3),
elf_getscn(3),
gelf(3)