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134 lines
3.5 KiB
Groff
134 lines
3.5 KiB
Groff
.\" Copyright (c) 2006,2007 Joseph Koshy. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" This software is provided by Joseph Koshy ``as is'' and
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.\" any express or implied warranties, including, but not limited to, the
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.\" implied warranties of merchantability and fitness for a particular purpose
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.\" are disclaimed. in no event shall Joseph Koshy be liable
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.\" for any direct, indirect, incidental, special, exemplary, or consequential
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.\" damages (including, but not limited to, procurement of substitute goods
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.\" or services; loss of use, data, or profits; or business interruption)
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.\" however caused and on any theory of liability, whether in contract, strict
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.\" liability, or tort (including negligence or otherwise) arising in any way
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.\" out of the use of this software, even if advised of the possibility of
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.\" such damage.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 22, 2007
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.Os
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.Dt GELF_NEWPHDR 3
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.Sh NAME
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.Nm elf32_newphdr ,
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.Nm elf64_newphdr ,
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.Nm gelf_newphdr
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.Nd allocate an ELF program header table
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.Sh LIBRARY
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.Lb libelf
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.Sh SYNOPSIS
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.In libelf.h
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.Ft "Elf32_Phdr *"
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.Fn elf32_newphdr "Elf *elf" "size_t count"
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.Ft "Elf64_Phdr *"
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.Fn elf64_newphdr "Elf *elf" "size_t count"
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.In gelf.h
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.Ft "void *"
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.Fn gelf_newphdr "Elf *elf" "size_t count"
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.Sh DESCRIPTION
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These functions allocate an ELF Program Header table
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for an ELF descriptor.
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.Vt Elf32_Phdr
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and
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.Vt Elf64_Phdr
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descriptors are described further in
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.Xr elf 5 .
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.Pp
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Functions
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.Fn elf32_newphdr
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and
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.Fn elf64_newphdr
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allocate a table of
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.Ar count
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.Vt Elf32_Phdr
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and
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.Vt Elf64_Phdr
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descriptors respectively,
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discarding any existing program header table
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already present in the ELF descriptor
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.Ar elf .
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A value of zero for argument
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.Ar count
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may be used to delete an existing program header table
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from an ELF descriptor.
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.Pp
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Function
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.Fn gelf_newphdr
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will return a table of
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.Vt Elf32_Phdr
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or
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.Vt Elf64_Phdr
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with
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.Ar count
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elements depending on the ELF class of ELF descriptor
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.Ar elf .
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.Pp
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The functions set the
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.Dv ELF_F_DIRTY
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flag on the program header table.
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All members of the returned array of Phdr structures
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will be initialized to zero.
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.Pp
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After a successful call to these functions, the pointer returned
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by a prior call to
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.Fn elf32_getphdr
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or
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.Fn elf64_getphdr
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on the same descriptor
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.Ar elf
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will no longer be valid.
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.Sh RETURN VALUES
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The functions a valid pointer if successful, or NULL in case an error
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was encountered.
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.Sh ERRORS
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These functions may fail with the following errors:
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.Bl -tag -width "[ELF_E_RESOURCE]"
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.It Bq Er ELF_E_ARGUMENT
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Argument
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.Ar elf
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was NULL.
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.It Bq Er ELF_E_ARGUMENT
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Argument
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.Ar elf
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was not a descriptor for an ELF object.
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.It Bq Er ELF_E_CLASS
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ELF descriptor
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.Ar elf
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was of an unrecognized class.
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.It Bq Er ELF_E_RESOURCE
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An out of memory condition was detected.
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.It Bq Er ELF_E_SEQUENCE
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An executable header was not allocated for ELF descriptor
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.Ar elf
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before using these APIs.
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.El
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.Sh SEE ALSO
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.Xr elf 3 ,
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.Xr elf32_getphdr 3 ,
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.Xr elf32_newehdr 3 ,
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.Xr elf64_getphdr 3 ,
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.Xr elf64_newehdr 3 ,
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.Xr elf_flagphdr 3 ,
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.Xr elf_getphnum 3 ,
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.Xr gelf 3 ,
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.Xr gelf_getphdr 3 ,
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.Xr gelf_newehdr 3 ,
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.Xr elf 5
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