ae500c1ff8
Highlights: - Make sure that only TLS sections are sorted into TLS segment. - Fixed multiple errors in "Section to Segment mapping". - Man page updates - ar improvements - elfcopy: avoid filter_reloc uninitialized variable for rela - elfcopy: avoid stripping relocations from static binaries - readelf: avoid printing directory in front of absolute path - readelf: add NT_FREEBSD_FEATURE_CTL FreeBSD note type - test improvements NOTES: Some of these changes originated in FreeBSD and simply reduce diffs between contrib and vendor. ELF Tool Chain ar is not (currently) used in FreeBSD, and there are improvements in both FreeBSD and ELF Tool Chain ar that are not in the other. Sponsored by: The FreeBSD Foundation
143 lines
3.8 KiB
Groff
143 lines
3.8 KiB
Groff
.\" Copyright (c) 2006-2008 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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.\" $Id: gelf_newphdr.3 3639 2018-10-14 14:07:02Z jkoshy $
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.\"
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.Dd October 22, 2007
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.Dt GELF_NEWPHDR 3
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.Os
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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 COMPATIBILITY
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The
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.Fn gelf_newphdr
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function uses a type of
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.Ft "void *"
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for its returned value.
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This differs from some other implementations of the ELF(3) API, which use an
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.Ft "unsigned long"
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return type.
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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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