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
165 lines
4.7 KiB
Groff
165 lines
4.7 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_line_entry.3 3644 2018-10-15 19:55:01Z jkoshy $
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.\"
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.Dd June 30, 2013
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.Dt DWARF_ADD_LINE_ENTRY 3
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.Os
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.Sh NAME
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.Nm dwarf_add_line_entry
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.Nd add a line number information entry to a producer instance
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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_Unsigned"
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.Fo dwarf_add_line_entry
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.Fa "Dwarf_P_Debug dbg"
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.Fa "Dwarf_Unsigned filendx"
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.Fa "Dwarf_Addr off"
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.Fa "Dwarf_Unsigned lineno"
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.Fa "Dwarf_Signed column"
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.Fa "Dwarf_Bool is_stmt"
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.Fa "Dwarf_Bool basic_block"
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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_line_entry
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adds a line number information entry to a DWARF producer instance.
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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 filendx
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specifies the index of the source file that contains the source line
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in question.
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Valid source file indices are those returned by the function
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.Xr dwarf_add_file_decl 3 .
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.Pp
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Argument
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.Ar off
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specifies a relocatable program address.
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The ELF symbol to be used
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for relocation is set by a prior call to the function
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.Xr dwarf_lne_set_address 3 .
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.Pp
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Argument
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.Ar lineno
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specifies the line number of the source line.
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.Pp
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Argument
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.Ar column
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specifies the column number within the source line.
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.Pp
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If the argument
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.Ar is_stmt
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is set to true, it indicates that the instruction at the address
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specified by argument
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.Ar off
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is a recommended breakpoint location, i.e., the first instruction in
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the instruction sequence generated by the source line.
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.Pp
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If the argument
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.Ar basic_block
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is set to true, it indicates that the instruction at the address
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specified by argument
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.Ar off
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is the first instruction of a basic block.
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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 store error information 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_add_line_entry
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returns
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.Dv DW_DLV_OK .
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In case of an error, function
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.Fn dwarf_add_line_entry
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returns
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.Dv DW_DLV_NOCOUNT
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and sets the argument
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.Ar err .
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.Sh EXAMPLES
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To add line number information to the producer instance, use:
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.Bd -literal -offset indent
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Dwarf_P_Debug dbg;
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Dwarf_Error de;
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Dwarf_Unsigned dir, filendx;
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/* ... assume dbg refers to a DWARF producer instance ... */
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dir = dwarf_add_directory_decl(dbg, "/home/foo", &de);
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if (dir == DW_DLV_NOCOUNT)
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errx(EXIT_FAILURE, "dwarf_add_directory_decl failed: %s",
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dwarf_errmsg(-1));
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filendx = dwarf_add_file_decl(dbg, "bar.c", dir, 0, 1234, &de);
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if (filendx == DW_DLV_NOCOUNT)
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errx(EXIT_FAILURE, "dwarf_add_file_decl failed: %s",
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dwarf_errmsg(-1));
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if (dwarf_lne_set_address(dbg, 0x4012b0, 12, &de) != DW_DLV_OK)
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errx(EXIT_FAILURE, "dwarf_lne_set_address failed: %s",
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dwarf_errmsg(-1));
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if (dwarf_add_line_entry(dbg, filendx, 10, 258, 0, 1, 1, &de) !=
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DW_DLV_OK)
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errx(EXIT_FAILURE, "dwarf_add_line_entry failed: %s",
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dwarf_errmsg(-1));
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.Ed
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.Sh ERRORS
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Function
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.Fn dwarf_add_line_entry
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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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Argument
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.Ar dbg
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was NULL.
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.It Bq Er DW_DLE_ARGUMENT
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The function
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.Xr dwarf_lne_set_address 3
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was not called before calling this function.
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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_add_directory_decl 3 ,
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.Xr dwarf_add_file_decl 3 ,
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.Xr dwarf_lne_end_sequence 3 ,
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.Xr dwarf_lne_set_address 3 ,
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.Xr dwarf_producer_init 3 ,
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.Xr dwarf_producer_init_b 3
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