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
109
110
111
112
|
/* Helper functions for form handling.
Copyright (C) 2003, 2004 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2003.
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 <string.h>
#include "libdwP.h"
size_t
internal_function_def
__libdw_form_val_len (Dwarf *dbg, struct Dwarf_CU *cu, unsigned int form,
const unsigned char *valp)
{
const unsigned char *saved;
Dwarf_Word u128;
size_t result;
switch (form)
{
case DW_FORM_addr:
result = cu->address_size;
break;
case DW_FORM_strp:
case DW_FORM_ref_addr:
result = cu->offset_size;
break;
case DW_FORM_block1:
result = *valp + 1;
break;
case DW_FORM_block2:
result = read_2ubyte_unaligned (dbg, valp) + 2;
break;
case DW_FORM_block4:
result = read_4ubyte_unaligned (dbg, valp) + 4;
break;
case DW_FORM_block:
saved = valp;
get_uleb128 (u128, valp);
result = u128 + (valp - saved);
break;
case DW_FORM_ref1:
case DW_FORM_data1:
case DW_FORM_flag:
result = 1;
break;
case DW_FORM_data2:
case DW_FORM_ref2:
result = 2;
break;
case DW_FORM_data4:
case DW_FORM_ref4:
result = 4;
break;
case DW_FORM_data8:
case DW_FORM_ref8:
result = 8;
break;
case DW_FORM_string:
result = strlen ((char *) valp) + 1;
break;
case DW_FORM_sdata:
case DW_FORM_udata:
case DW_FORM_ref_udata:
saved = valp;
get_uleb128 (u128, valp);
result = valp - saved;
break;
case DW_FORM_indirect:
saved = valp;
get_uleb128 (u128, valp);
// XXX Is this really correct?
result = __libdw_form_val_len (dbg, cu, u128, valp);
if (result != (size_t) -1)
result += valp - saved;
break;
default:
__libdw_seterrno (DWARF_E_INVALID_DWARF);
result = (size_t) -1l;
break;
}
return result;
}
|
