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
195 lines
4.8 KiB
Groff
195 lines
4.8 KiB
Groff
.\" Copyright (c) 2010,2014 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_highpc.3 3644 2018-10-15 19:55:01Z jkoshy $
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.\"
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.Dd July 22, 2014
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.Dt DWARF_HIGHPC 3
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.Os
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.Sh NAME
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.Nm dwarf_arrayorder ,
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.Nm dwarf_bitoffset ,
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.Nm dwarf_bitsize ,
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.Nm dwarf_bytesize ,
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.Nm dwarf_highpc ,
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.Nm dwarf_highpc_b ,
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.Nm dwarf_lowpc ,
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.Nm dwarf_srclang
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.Nd retrieve the value of a DWARF 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_arrayorder
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.Fa "Dwarf_Die die"
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.Fa "Dwarf_Unsigned *ret_order"
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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_bitoffset
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.Fa "Dwarf_Die die"
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.Fa "Dwarf_Unsigned *ret_size"
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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_bitsize
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.Fa "Dwarf_Die die"
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.Fa "Dwarf_Unsigned *ret_size"
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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_bytesize
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.Fa "Dwarf_Die die"
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.Fa "Dwarf_Unsigned *ret_size"
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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_highpc
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.Fa "Dwarf_Die die"
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.Fa "Dwarf_Addr *ret_highpc"
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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_highpc_b
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.Fa "Dwarf_Die die"
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.Fa "Dwarf_Addr *ret_highpc"
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.Fa "Dwarf_Half *ret_form"
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.Fa "enum Dwarf_Form_Class *ret_class"
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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_lowpc
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.Fa "Dwarf_Die die"
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.Fa "Dwarf_Addr *ret_lowpc"
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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_srclang
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.Fa "Dwarf_Die die"
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.Fa "Dwarf_Unsigned *ret_lang"
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.Fa "Dwarf_Error *err"
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.Fc
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.Sh DESCRIPTION
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These convenience functions are used to retrieve DWARF attribute
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values associated with a Debugging Information Entry (DIE) descriptor
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denoted by argument
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.Ar die .
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These functions store the value of the requested attribute into the
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location pointed to by their second argument, provided that the requested
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attribute exists in the debugging information entry.
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.Pp
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The list of functions and the DWARF attribute that they retrieve are:
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.Pp
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.Bl -tag -width ".Fn dwarf_arrayorder" -compact
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.It Fn dwarf_arrayorder
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Retrieve the
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.Dv DW_AT_ordering
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attribute value.
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.It Fn dwarf_bitoffset
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Retrieve the
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.Dv DW_AT_bit_offset
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attribute value.
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.It Fn dwarf_bitsize
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Retrieve the
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.Dv DW_AT_bit_size
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attribute value.
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.It Fn dwarf_bytesize
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Retrieve the
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.Dv DW_AT_byte_size
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attribute value.
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.It Fn dwarf_highpc
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Retrieve the
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.Dv DW_AT_high_pc
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attribute value.
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.It Fn dwarf_highpc_b
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Retrieve the
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.Dv DW_AT_high_pc
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attribute value.
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.It Fn dwarf_lowpc
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Retrieve the
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.Dv DW_AT_low_pc
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attribute value.
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.It Fn dwarf_srclang
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Retrieve the
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.Dv DW_AT_language
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attribute value.
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.El
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.Pp
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Function
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.Fn dwarf_highpc_b
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is an enhanced version of function
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.Fn dwarf_highpc .
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It sets the location specified by argument
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.Ar ret_form
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to the form code of the attribute
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.Dv DW_AT_high_pc ,
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and sets the location specified by argument
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.Ar ret_class
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to the class of that form.
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A value of NULL may be used for either of the arguments
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.Ar ret_form
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or
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.Ar ret_class
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if the caller is not interested in the respective value.
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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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.Pp
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If the debugging information entry descriptor denoted by argument
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.Ar die
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does not contain the requested attribute, these functions return
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.Dv DW_DLV_NO_ENTRY
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and set argument
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.Ar err .
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For other errors, they return
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.Dv DW_DLV_ERROR
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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 can 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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Arguments
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.Ar die ,
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.Ar ret_highpc ,
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.Ar ret_lowpc ,
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.Ar ret_size ,
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.Ar ret_lang
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or
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.Ar ret_order
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were NULL.
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.It Bq Er DW_DLE_NO_ENTRY
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Argument
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.Ar die
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had no requested attribute.
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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_attrlist 3 ,
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.Xr dwarf_get_form_class 3 ,
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.Xr dwarf_hasattr 3
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