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
135 lines
3.8 KiB
Groff
135 lines
3.8 KiB
Groff
.\" Copyright (c) 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_next_types_section.3 3644 2018-10-15 19:55:01Z jkoshy $
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.\"
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.Dd December 20, 2014
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.Dt DWARF_NEXT_TYPES_SECTION 3
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.Os
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.Sh NAME
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.Nm dwarf_next_types_section
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.Nd step through .debug_types sections in a debug context
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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_next_types_section
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.Fa "Dwarf_Debug dbg"
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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_next_types_section
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steps through the
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.Dq \&.debug_types
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sections found in a debug context.
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.Pp
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Argument
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.Ar dbg
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should reference a DWARF debug context allocated using
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.Xr dwarf_init 3 .
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Argument
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.Ar err
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should point to a location that will hold an error descriptor in case
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of an error.
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.Pp
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When a DWARF debug context is allocated using
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.Xr dwarf_init 3 ,
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an internal pointer associated with the context will point to the
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first
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.Dq \&.debug_types
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section present in the debug object.
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When the application calls function
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.Fn dwarf_next_types_section ,
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this internal pointer will move to the next
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.Dq \&.debug_types
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section present.
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On stepping past the last
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.Dq \&.debug_types
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section left in the debug context, function
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.Fn dwarf_next_types_section
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returns
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.Dv DW_DLV_NO_ENTRY .
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The next call to the function will restart from the first
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.Dq \&.debug_types
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section in the debug context.
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.Pp
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Application code should call function
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.Xr dwarf_next_cu_header_c 3
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to iterate though the type units associated with the current
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.Dq \&.debug_types
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section.
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.Sh RETURN VALUES
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On success, function
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.Fn dwarf_next_types_section
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returns
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.Dv DW_DLV_OK .
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.Pp
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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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When there are no more
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.Dq \&.debug_types
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sections left to traverse, it returns
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.Dv DW_DLV_NO_ENTRY .
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.Sh EXAMPLES
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To iterate though every type unit in all the
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.Dq \&.debug_types
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sections found in a debug context:
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.Bd -literal -offset indent
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Dwarf_Debug dbg;
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Dwarf_Sig8 sig8;
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Dwarf_Unsigned typeoff;
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Dwarf_Error de;
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\&... allocate dbg using dwarf_init() etc ...
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do {
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while ((ret = dwarf_next_cu_header_c(dbg, 0, NULL, NULL, NULL,
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NULL, NULL, NULL, &sig8, &typeoff, NULL, &de)) == DW_DLV_OK) {
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/* Access DIEs etc ... */
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}
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} while (dwarf_next_types_section(dbg, &de) == DW_DLV_OK);
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.Ed
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.Sh COMPATIBILITY
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This function is an extension to the
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.Xr DWARF 3
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API.
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.Sh ERRORS
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The
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.Fn dwarf_next_types_section
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function may 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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Argument
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.Va dbg
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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_init 3 ,
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.Xr dwarf_next_cu_header_c 3
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