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\" Id: gelf_newphdr.3 3958 2022-03-12 14:31:32Z jkoshy
\"
Dd June 12, 2019
Dt GELF_NEWPHDR 3
Os
Sh NAME
Nm elf32_newphdr ,
Nm elf64_newphdr ,
Nm gelf_newphdr
Nd allocate an ELF program header table
Sh LIBRARY
Lb libelf
Sh SYNOPSIS
In libelf.h
Ft "Elf32_Phdr *"
Fn elf32_newphdr "Elf *elf" "size_t count"
Ft "Elf64_Phdr *"
Fn elf64_newphdr "Elf *elf" "size_t count"
In gelf.h
Ft "void *"
Fn gelf_newphdr "Elf *elf" "size_t count"
Sh DESCRIPTION
These functions allocate an ELF Program Header table
for an ELF descriptor.
Vt Elf32_Phdr
and
Vt Elf64_Phdr
descriptors are described further in
Xr elf 5 .
Pp
Functions
Fn elf32_newphdr
and
Fn elf64_newphdr
allocate a table of
Fa count
Vt Elf32_Phdr
and
Vt Elf64_Phdr
descriptors respectively,
discarding any existing program header table
already present in the ELF descriptor
Fa elf .
A value of zero for argument
Fa count
may be used to delete an existing program header table
from an ELF descriptor.
Pp
Function
Fn gelf_newphdr
will return a table of
Vt Elf32_Phdr
or
Vt Elf64_Phdr
with
Fa count
elements depending on the ELF class of ELF descriptor
Fa elf .
Pp
The functions set the
Dv ELF_F_DIRTY
flag on the program header table.
All members of the returned array of Phdr structures
will be initialized to zero.
Pp
After a successful call to these functions, the pointer returned
by a prior call to
Fn elf32_getphdr
or
Fn elf64_getphdr
on the same descriptor
Fa elf
will no longer be valid.
Sh RETURN VALUES
The functions a valid pointer if successful, or
Dv NULL
in case an error was encountered.
Sh COMPATIBILITY
The
Fn gelf_newphdr
function uses a type of
Ft "void *"
for its returned value.
This differs from some other implementations of the
Xr elf 3
API, which use an
Ft "unsigned long"
return type.
Sh ERRORS
These functions may fail with the following errors:
Bl -tag -width "[ELF_E_RESOURCE]"
It Bq Er ELF_E_ARGUMENT
Argument
Fa elf
was
Dv NULL .
It Bq Er ELF_E_ARGUMENT
Argument
Fa elf
was not a descriptor for an ELF object.
It Bq Er ELF_E_CLASS
ELF descriptor
Fa elf
was of an unrecognized class.
It Bq Er ELF_E_RESOURCE
An out of memory condition was detected.
It Bq Er ELF_E_SEQUENCE
An executable header was not allocated for ELF descriptor
Fa elf
before using these APIs.
El
Sh SEE ALSO
Xr elf 3 ,
Xr elf32_getphdr 3 ,
Xr elf32_newehdr 3 ,
Xr elf64_getphdr 3 ,
Xr elf64_newehdr 3 ,
Xr elf_flagphdr 3 ,
Xr elf_getphnum 3 ,
Xr gelf 3 ,
Xr gelf_getphdr 3 ,
Xr gelf_newehdr 3 ,
Xr elf 5
