mirror of
https://github.com/freebsd/freebsd-src
synced 2024-10-06 16:40:47 +00:00
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
157 lines
4.2 KiB
Groff
157 lines
4.2 KiB
Groff
.\" Copyright (c) 2011 Kai Wang
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $Id: dwarf_get_loclist_entry.3 3644 2018-10-15 19:55:01Z jkoshy $
|
|
.\"
|
|
.Dd July 6, 2011
|
|
.Dt DWARF_GET_LOCLIST_ENTRY 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm dwarf_get_loclist_entry
|
|
.Nd retrieve DWARF location list entry
|
|
.Sh LIBRARY
|
|
.Lb libdwarf
|
|
.Sh SYNOPSIS
|
|
.In libdwarf.h
|
|
.Ft int
|
|
.Fo dwarf_get_loclist_entry
|
|
.Fa "Dwarf_Debug dbg"
|
|
.Fa "Dwarf_Unsigned offset"
|
|
.Fa "Dwarf_Addr *hipc"
|
|
.Fa "Dwarf_Addr *lopc"
|
|
.Fa "Dwarf_Ptr *data"
|
|
.Fa "Dwarf_Unsigned *entry_len"
|
|
.Fa "Dwarf_Unsigned *next_entry"
|
|
.Fa "Dwarf_Error *err"
|
|
.Fc
|
|
.Sh DESCRIPTION
|
|
Function
|
|
.Fn dwarf_get_loclist_entry
|
|
retrieves a location list entry from the DWARF section
|
|
.Dq ".debug_loc" .
|
|
.Pp
|
|
Argument
|
|
.Ar dbg
|
|
should reference a DWARF debug context allocated using
|
|
.Xr dwarf_init 3 .
|
|
.Pp
|
|
Argument
|
|
.Ar offset
|
|
is an offset, relative to the
|
|
.Dq ".debug_loc"
|
|
section, to the start of the desired location list entry.
|
|
.Pp
|
|
Argument
|
|
.Ar hipc
|
|
should point to a location which will hold the offset, relative to the
|
|
base address of the location list entry, of the highest program
|
|
counter value for the entry.
|
|
.Pp
|
|
Argument
|
|
.Ar lowpc
|
|
should point to a location which will hold the offset, relative to the
|
|
base address of the location list entry, of the lowest program counter
|
|
value for the entry.
|
|
.Pp
|
|
Argument
|
|
.Ar data
|
|
should point to a location which will be set to a pointer to the location
|
|
list data.
|
|
.Pp
|
|
Argument
|
|
.Ar entry_len
|
|
should point to a location which will hold the length in bytes of the
|
|
location list data returned in argument
|
|
.Ar data .
|
|
.Pp
|
|
Argument
|
|
.Ar next_entry
|
|
should point to a location which will hold the offset of the next
|
|
location list entry.
|
|
.Pp
|
|
If argument
|
|
.Ar err
|
|
is not NULL, it will be used to store error information in case
|
|
of an error.
|
|
.Sh RETURN VALUES
|
|
Function
|
|
.Fn dwarf_get_loclist_entry
|
|
returns
|
|
.Dv DW_DLV_OK
|
|
when it succeeds.
|
|
It returns
|
|
.Dv DW_DLV_NO_ENTRY
|
|
if there is no location list at the specified offset
|
|
.Ar offset .
|
|
In case of an error, it returns
|
|
.Dv DW_DLV_ERROR
|
|
and sets the argument
|
|
.Ar err .
|
|
.Sh EXAMPLES
|
|
To iterate through all the location list entries in the
|
|
.Dq ".debug_loc"
|
|
section, use:
|
|
.Bd -literal -offset indent
|
|
Dwarf_Debug dbg;
|
|
Dwarf_Unsigned off, len, next;
|
|
Dwarf_Addr hipc, lopc;
|
|
Dwarf_Ptr data;
|
|
Dwarf_Error de;
|
|
int ret;
|
|
|
|
off = 0;
|
|
while ((ret = dwarf_get_loclist_entry(dbg, off, &hipc, &lopc, &data,
|
|
&len, &next, &de)) == DW_DLV_OK) {
|
|
/* ... use loclist entry ... */
|
|
off = next;
|
|
}
|
|
if (ret == DW_DLV_ERROR)
|
|
warnx("dwarf_get_loclist_entry failed: %s", dwarf_errmsg(de));
|
|
.Ed
|
|
.Sh ERRORS
|
|
Function
|
|
.Fn dwarf_get_loclist_entry
|
|
can fail with:
|
|
.Bl -tag -width ".Bq Er DW_DLE_NO_ENTRY"
|
|
.It Bq Er DW_DLE_ARGUMENT
|
|
One of the arguments
|
|
.Ar dbg ,
|
|
.Ar hipc ,
|
|
.Ar lopc ,
|
|
.Ar data ,
|
|
.Ar entry_len
|
|
or
|
|
.Ar next_entry
|
|
was NULL.
|
|
.It Bq Er DW_DLE_NO_ENTRY
|
|
There is no location list at the specified offset
|
|
.Ar offset .
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr dwarf 3 ,
|
|
.Xr dwarf_loclist 3 ,
|
|
.Xr dwarf_loclist_from_expr 3 ,
|
|
.Xr dwarf_loclist_from_expr_a 3 ,
|
|
.Xr dwarf_loclist_n 3
|