mirror of
https://github.com/openharmony/third_party_elfutils.git
synced 2026-07-18 09:17:34 -04:00
Petr Machata
fb90bf3f84
- This code is based on the following proposal:
http://www.dwarfstd.org/ShowIssue.php?issue=110722.1
- dwarf_getmacros serves either of .debug_macinfo or .debug_macro
transparently, but if the latter uses opcode 0xff, it bails out with
an error. The reason is that in .debug_macro, 0xff is a custom code
that can mean anything, while in .debug_macinfo there's fixed
semantics associated with 0xff.
- dwarf_getmacros_off is a new interface used for requesting iteration
through transparently included units.
- dwarf_macro_getparamcnt and dwarf_macro_param are new interfaces
used for requesting number of parameters of an opcode and individual
parameters. dwarf_macro_getsrcfiles is a new interface used for
requesting a file part of .debug_line unit associated with macro
unit that the opcode comes from.
- The existing interfaces dwarf_macro_opcode, dwarf_macro_param1 and
dwarf_macro_param2 remain operational for old- as well as new-style
Dwarf macro sections, if applicable.
- dwarf_getsrclines was made into a light wrapper around a worker
function that loads line unit given its offset. The worker also
caches loaded units in an offset-keyed search tree, so that we don't
end up re-reading units even though they were read in a different
domain (e.g. a macro unit request can prime cache for later CU
lookup). dwarf_macro_getsrcfiles calls the worker function under
covers.
Signed-off-by: Petr Machata <pmachata@redhat.com>
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/* Return second macro parameter.
|
|
Copyright (C) 2005, 2014 Red Hat, Inc.
|
|
This file is part of elfutils.
|
|
Written by Ulrich Drepper <drepper@redhat.com>, 2005.
|
|
|
|
This file is free software; you can redistribute it and/or modify
|
|
it under the terms of either
|
|
|
|
* the GNU Lesser General Public License as published by the Free
|
|
Software Foundation; either version 3 of the License, or (at
|
|
your option) any later version
|
|
|
|
or
|
|
|
|
* the GNU General Public License as published by the Free
|
|
Software Foundation; either version 2 of the License, or (at
|
|
your option) any later version
|
|
|
|
or both in parallel, as here.
|
|
|
|
elfutils is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received copies of the GNU General Public License and
|
|
the GNU Lesser General Public License along with this program. If
|
|
not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include "libdwP.h"
|
|
|
|
|
|
int
|
|
dwarf_macro_param2 (Dwarf_Macro *macro, Dwarf_Word *paramp, const char **strp)
|
|
{
|
|
if (macro == NULL)
|
|
return -1;
|
|
|
|
Dwarf_Attribute param;
|
|
if (dwarf_macro_param (macro, 1, ¶m) != 0)
|
|
return -1;
|
|
|
|
if (param.form == DW_FORM_string
|
|
|| param.form == DW_FORM_strp)
|
|
{
|
|
*strp = dwarf_formstring (¶m);
|
|
return 0;
|
|
}
|
|
else
|
|
return dwarf_formudata (¶m, paramp);
|
|
}
|