mirror of
https://github.com/freebsd/freebsd-src
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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
121 lines
3.5 KiB
Groff
121 lines
3.5 KiB
Groff
.\" Copyright (c) 2011 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_add_AT_location_expr.3 3640 2018-10-14 14:09:13Z jkoshy $
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.\"
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.Dd September 5, 2011
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.Dt DWARF_ADD_AT_LOCATION_EXPR 3
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.Os
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.Sh NAME
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.Nm dwarf_add_AT_location_expr
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.Nd create an attribute descriptor for a location expression
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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 "Dwarf_P_Attribute"
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.Fo dwarf_add_AT_location_expr
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.Fa "Dwarf_P_Debug dbg"
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.Fa "Dwarf_P_Die die"
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.Fa "Dwarf_Half attr"
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.Fa "Dwarf_P_Expr loc_expr"
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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_add_AT_location_expr
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creates an attribute descriptor for a location expression and attaches
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it to the debugging information entry referenced by argument
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.Ar die .
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.Pp
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Argument
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.Ar dbg
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should reference a DWARF producer instance allocated using
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.Xr dwarf_producer_init 3
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or
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.Xr dwarf_producer_init_b 3 .
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.Pp
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Argument
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.Ar die
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should reference a debugging information entry allocated using
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.Xr dwarf_new_die 3 .
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.Pp
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Argument
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.Ar attr
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specifies the attribute code of the created attribute descriptor.
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.Pp
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Argument
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.Ar loc_expr
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should reference a location expression descriptor allocated using
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.Xr dwarf_new_expr 3 .
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.Pp
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The attribute created by function
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.Fn dwarf_add_AT_location_expr
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will have one of the DWARF forms
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.Dv DW_FORM_block ,
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.Dv DW_FORM_block1 ,
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.Dv DW_FORM_block2
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or
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.Dv DW_FORM_block4 ,
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depending on the size of the byte stream generated by the location
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expression descriptor referenced by argument
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.Ar loc_expr .
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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 by to store error information in case of
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an error.
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.Sh RETURN VALUES
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On success, function
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.Fn dwarf_add_AT_location_expr
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returns the created attribute descriptor.
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In case of an error, function
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.Fn dwarf_add_AT_location_expr
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returns
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.Dv DW_DLV_BADADDR
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and sets the argument
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.Ar err .
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.Sh ERRORS
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Function
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.Fn dwarf_add_AT_location_expr
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can fail with:
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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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One of the arguments
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.Ar dbg ,
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.Ar die
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or
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.Ar loc_expr
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was NULL.
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.It Bq Er DW_DLE_MEMORY
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An out of memory condition was encountered during the execution of the
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function.
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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_new_die 3 ,
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.Xr dwarf_new_expr 3 ,
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.Xr dwarf_producer_init 3 ,
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.Xr dwarf_producer_init_b 3
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