b00fe64f4a
Highlights: - Fix man page markup, whitespace, and typos - Fix sh_info of SHT_GROUP section to point to the correct string - Improve validation in readelf and elfcopy/strip - Handle DWARF 4's DW_AT_high_pc in addr2line Sponsored by: The FreeBSD Foundation
93 lines
2.7 KiB
Groff
93 lines
2.7 KiB
Groff
.\" Copyright (c) 2010 Kai Wang
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.\" 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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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_hasattr.3 3181 2015-04-10 13:22:51Z emaste $
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.\"
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.Dd April 17, 2010
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.Os
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.Dt DWARF_HASATTR 3
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.Sh NAME
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.Nm dwarf_hasattr
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.Nd check for the presence of an attribute
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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_hasattr
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.Fa "Dwarf_Die die"
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.Fa "Dwarf_Half attr"
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.Fa "Dwarf_Bool *ret_bool"
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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_hasattr
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tests whether the debugging information entry referenced in argument
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.Ar die
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contains the attribute named by argument
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.Ar attr .
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Legal values for argument
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.Ar attr
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are those denoted by the
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.Dv DW_AT_*
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constants in the DWARF specification.
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.Pp
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If the named attribute is present in the debugging information entry,
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function
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.Fn dwarf_hasattr
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returns a non-zero value in the location pointed to by argument
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.Ar ret_bool .
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If the named attribute is not present, a zero is written instead.
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.Pp
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If argument
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.Ar err
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is not NULL, it will be used to return an error descriptor in case
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of an error.
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.Sh RETURN VALUES
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On success, function
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.Fn dwarf_hasattr
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returns
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.Dv DW_DLV_OK .
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In case of an error, it returns
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.Dv DW_DLV_ERROR
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and sets argument
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.Ar err .
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.Sh ERRORS
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Function
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.Fn dwarf_hasattr
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can fail with the following error:
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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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Either of argument
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.Va die
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or
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.Va ret_bool
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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_whatattr 3
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