b54d7a9715
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
128 lines
3.5 KiB
Groff
128 lines
3.5 KiB
Groff
.\" Copyright (c) 2010 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: dwarf_hasform.3 3640 2018-10-14 14:09:13Z jkoshy $
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.\"
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.Dd May 22, 2010
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.Dt DWARF_HASFORM 3
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.Os
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.Sh NAME
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.Nm dwarf_hasform ,
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.Nm dwarf_whatform ,
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.Nm dwarf_whatform_direct
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.Nd query attribute forms
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.Sh LIBRARY
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.Lb libdwarf
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.Sh SYNOPSIS
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.In libdwarf.h
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.Ft int
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.Fo dwarf_hasform
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.Fa "Dwarf_Attribute attr"
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.Fa "Dwarf_Half form"
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.Fa "Dwarf_Bool *ret"
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.Fa "Dwarf_Error *err"
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.Fc
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.Ft int
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.Fo dwarf_whatform
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.Fa "Dwarf_Attribute attr"
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.Fa "Dwarf_Half *retform"
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.Fa "Dwarf_Error *err"
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.Fc
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.Ft int
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.Fo dwarf_whatform_direct
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.Fa "Dwarf_Attribute attr"
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.Fa "Dwarf_Half *retform"
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.Fa "Dwarf_Error *err"
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.Fc
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.Sh DESCRIPTION
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Function
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.Fn dwarf_hasform
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indicates whether the DWARF attribute denoted by argument
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.Ar attr
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has the attribute form specified by argument
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.Ar form .
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If the attribute has the specified form, then
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argument
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.Ar ret
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is set to a non-zero value, otherwise it is set to zero.
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If argument
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.Ar err
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is non-NULL, it will be used to return an error descriptor in
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case of an error.
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.Pp
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Function
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.Fn dwarf_whatform
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sets the location specified by argument
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.Ar retform
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to the attribute form code for the DWARF attribute referenced
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by argument
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.Ar attr .
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If the attribute referenced by argument
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.Ar attr
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has an indirect form attribute, this function will return the final
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form for the attribute.
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If argument
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.Ar err
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is non-NULL, it will be used to return an error descriptor in
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case of an error.
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.Pp
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Function
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.Fn dwarf_whatform_direct
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sets the location specified by argument
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.Ar retform
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to the attribute form code for the DWARF attribute referenced
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by argument
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.Ar attr .
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If the form is an indirect form, the function sets the location
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specified by argument
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.Ar retform
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to
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.Dv DW_FORM_indirect .
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If argument
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.Ar err
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is non-NULL, it will be used to return an error descriptor in
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case of an error.
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.Sh RETURN VALUES
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These functions return
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.Dv DW_DLV_OK
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on success.
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In case of an error, these functions return
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.Dv DW_DLV_ERR
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and set argument
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.Ar err .
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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 ".Bq Er DW_DLE_ARGUMENT"
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.It Bq Er DW_DLE_ARGUMENT
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Any of the arguments
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.Ar attr ,
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.Ar ret ,
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or
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.Ar retform
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was NULL.
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.El
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.Sh SEE ALSO
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.Xr dwarf 3 ,
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.Xr dwarf_attr 3 ,
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.Xr dwarf_hasattr 3
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