Line data Source code
1 : /* Return high PC attribute of DIE.
2 : Copyright (C) 2003, 2005, 2012, 2018 Red Hat, Inc.
3 : This file is part of elfutils.
4 :
5 : This file is free software; you can redistribute it and/or modify
6 : it under the terms of either
7 :
8 : * the GNU Lesser General Public License as published by the Free
9 : Software Foundation; either version 3 of the License, or (at
10 : your option) any later version
11 :
12 : or
13 :
14 : * the GNU General Public License as published by the Free
15 : Software Foundation; either version 2 of the License, or (at
16 : your option) any later version
17 :
18 : or both in parallel, as here.
19 :
20 : elfutils is distributed in the hope that it will be useful, but
21 : WITHOUT ANY WARRANTY; without even the implied warranty of
22 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 : General Public License for more details.
24 :
25 : You should have received copies of the GNU General Public License and
26 : the GNU Lesser General Public License along with this program. If
27 : not, see <http://www.gnu.org/licenses/>. */
28 :
29 : #ifdef HAVE_CONFIG_H
30 : # include <config.h>
31 : #endif
32 :
33 : #include <dwarf.h>
34 : #include "libdwP.h"
35 :
36 :
37 : int
38 544109 : dwarf_highpc (Dwarf_Die *die, Dwarf_Addr *return_addr)
39 : {
40 : Dwarf_Attribute attr_high_mem;
41 : Dwarf_Attribute *attr_high;
42 : /* Split compile DIEs inherit high_pc from their skeleton DIE. */
43 544109 : if (is_cudie (die) && die->cu->unit_type == DW_UT_split_compile)
44 14 : attr_high = INTUSE(dwarf_attr_integrate) (die, DW_AT_high_pc,
45 : &attr_high_mem);
46 : else
47 544095 : attr_high = INTUSE(dwarf_attr) (die, DW_AT_high_pc, &attr_high_mem);
48 :
49 544109 : if (attr_high == NULL)
50 : goto no_addr;
51 :
52 28112 : if (INTUSE(dwarf_formaddr) (attr_high, return_addr) == 0)
53 : return 0;
54 :
55 : /* DWARF 4 allows high_pc to be a constant offset from low_pc. */
56 27445 : if (INTUSE(dwarf_lowpc) (die, return_addr) == 0)
57 : {
58 : Dwarf_Word uval;
59 27445 : if (INTUSE(dwarf_formudata) (attr_high, &uval) == 0)
60 : {
61 27445 : *return_addr += uval;
62 27445 : return 0;
63 : }
64 : }
65 :
66 1031994 : no_addr:
67 515997 : __libdw_seterrno (DWARF_E_NO_ADDR);
68 515997 : return -1;
69 : }
70 : INTDEF(dwarf_highpc)
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