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
203 lines
5.4 KiB
Groff
203 lines
5.4 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_lineno.3 3640 2018-10-14 14:09:13Z jkoshy $
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.\"
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.Dd February 5, 2011
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.Dt DWARF_LINENO 3
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.Os
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.Sh NAME
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.Nm dwarf_lineaddr ,
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.Nm dwarf_linebeginstatement ,
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.Nm dwarf_lineblock ,
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.Nm dwarf_lineendsequence ,
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.Nm dwarf_lineno ,
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.Nm dwarf_lineoff ,
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.Nm dwarf_linesrc ,
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.Nm dwarf_line_srcfileno
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.Nd retrieve information associated with a DWARF line descriptor
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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_lineaddr
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.Fa "Dwarf_Line ln"
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.Fa "Dwarf_Addr *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_linebeginstatement
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.Fa "Dwarf_Line ln"
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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_lineblock
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.Fa "Dwarf_Line ln"
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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_lineendsequence
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.Fa "Dwarf_Line ln"
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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_lineno
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.Fa "Dwarf_Line ln"
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.Fa "Dwarf_Unsigned *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_lineoff
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.Fa "Dwarf_Line ln"
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.Fa "Dwarf_Signed *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_linesrc
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.Fa "Dwarf_Line ln"
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.Fa "char **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_line_srcfileno
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.Fa "Dwarf_Line ln"
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.Fa "Dwarf_Unsigned *ret"
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.Fa "Dwarf_Error *err"
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.Fc
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.Sh DESCRIPTION
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These functions retrieve specific line information associated with
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the line descriptor specified by argument
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.Ar ln ,
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and stores it in the location pointed to by argument
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.Ar ret .
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If argument
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.Ar err
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is not NULL, it will be used to store error information in case of an
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error.
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.Pp
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Function
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.Fn dwarf_lineaddr
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stores the program address corresponding to the source line specified
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in argument
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.Ar ln
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into the location pointed to by argument
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.Ar ret .
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.Pp
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Function
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.Fn dwarf_linebeginstatement
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sets the location pointed to by argument
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.Ar ret
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to 1 if the source line specified by the line descriptor
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.Ar ln
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is the beginning of a statement, or to 0 otherwise.
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.Pp
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Function
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.Fn dwarf_lineblock
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sets the location pointed to by argument
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.Ar ret
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to 1 if the source line specified by the line descriptor
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.Ar ln
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is the beginning of a basic block, or to 0 otherwise.
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.Pp
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Function
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.Fn dwarf_lineendsequence
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sets the location pointed to by argument
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.Ar ret
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to 1 if the program address associated with the line descriptor
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.Ar ln
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is the address immediately following the end of a sequence of target
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machine instructions, or to 0 otherwise.
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.Pp
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Function
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.Fn dwarf_lineno
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stores the line number of the source line associated with the line
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descriptor
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.Ar ln
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into the location pointed to by argument
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.Ar ret .
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.Pp
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Function
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.Fn dwarf_lineoff
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stores the column number within a line associated with descriptor
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.Ar ln
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into the location pointed to by argument
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.Ar ret .
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The retrieved column numbers are 1-based, with the value -1 indicating
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that column number information was not available.
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.Pp
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Function
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.Fn dwarf_linesrc
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stores a pointer to a NUL-terminated string containing the source file
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name associated with line descriptor
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.Ar ln
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into the location pointed to by argument
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.Ar ret .
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The full path of the source file is returned if possible.
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The memory used for the source file name string is managed by the DWARF(3)
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library and should not be directly freed by application code.
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Instead, portable code should use
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.Xr dwarf_dealloc 3
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to indicate that the string should be freed.
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.Pp
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Function
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.Fn dwarf_line_srcfileno
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stores the index of the source file associated with the line descriptor
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.Ar ln
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in the location pointed to by argument
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.Ar ret .
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The returned value is 1-based index into the array of source file
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names returned by
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.Xr dwarf_srcfiles 3 .
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.Sh RETURN VALUES
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On success, these functions returns
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.Dv DW_DLV_OK .
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In case of an error, they return
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.Dv DW_DLV_ERROR
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and set the 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_LINE_FILE_NUM_BAD"
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.It Bq Er DW_DLE_ARGUMENT
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Either of the arguments
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.Va ln
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or
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.Va ret
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was NULL.
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.It Bq Er DW_DLE_LINE_FILE_NUM_BAD
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The source file name associated with the line descriptor
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.Ar ln
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could not be retrieved by function
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.Fn dwarf_linesrc .
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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_dealloc 3 ,
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.Xr dwarf_srcfiles 3 ,
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.Xr dwarf_srclines 3
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