1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/* Return high program counter value associated with die.
Copyright (C) 2000, 2001, 2002 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2000.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <dwarf.h>
#include <libdwarfP.h>
int
dwarf_highpc (die, return_highpc, error)
Dwarf_Die die;
Dwarf_Addr *return_highpc;
Dwarf_Error *error;
{
Dwarf_Debug dbg = die->cu->dbg;
Dwarf_Small *die_addr;
Dwarf_Word u128;
Dwarf_Abbrev abbrev;
Dwarf_Small *attrp;
/* Address of the given die. */
die_addr = die->addr;
/* Get abbrev code. */
get_uleb128 (u128, die_addr);
/* And get the abbreviation itself. */
abbrev = __libdwarf_get_abbrev (dbg, die->cu, u128, error);
if (abbrev == NULL)
return DW_DLV_ERROR;
/* This is where the attributes start. */
attrp = abbrev->attrp;
/* Search the name attribute. */
while (1)
{
Dwarf_Word attr_name;
Dwarf_Word attr_form;
/* Are we still in bounds? */
if (unlikely (attrp
>= ((Dwarf_Small *) dbg->sections[IDX_debug_abbrev].addr
+ dbg->sections[IDX_debug_abbrev].size)))
{
__libdwarf_error (dbg, error, DW_E_INVALID_DWARF);
return DW_DLV_ERROR;
}
/* Get attribute name and form.
XXX We don't check whether this reads beyond the end of the
section. */
get_uleb128 (attr_name, attrp);
get_uleb128 (attr_form, attrp);
/* We can stop if we found the attribute with value zero. */
if (attr_name == 0 && attr_form == 0)
break;
/* Is this the name attribute? */
if (unlikely (attr_name == DW_AT_high_pc))
{
if (unlikely (attr_form != DW_FORM_addr))
{
__libdwarf_error (dbg, error, DW_E_INVALID_DWARF);
return DW_DLV_ERROR;
}
if (die->cu->address_size == 4)
*return_highpc = read_4ubyte_unaligned (dbg, die_addr);
else
*return_highpc = read_8ubyte_unaligned (dbg, die_addr);
return DW_DLV_OK;
}
/* Skip over the rest of this attribute (if there is any). */
if (attr_form != 0)
{
size_t len;
if (unlikely (__libdwarf_form_val_len (dbg, die->cu, attr_form,
die_addr, &len, error)
!= DW_DLV_OK))
return DW_DLV_ERROR;
die_addr += len;
}
}
/* No such attribute present. */
return DW_DLV_NO_ENTRY;
}
|
