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
113
114
115
116
117
118
119
120
121
122
|
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <libelfu/libelfu.h>
/* Meta-functions */
void* elfu_mPhdrForall(ElfuElf *me, PhdrHandlerFunc f, void *aux1, void *aux2)
{
ElfuPhdr *mp;
CIRCLEQ_FOREACH(mp, &me->phdrList, elem) {
ElfuPhdr *mp2;
void *rv = f(me, mp, aux1, aux2);
if (rv) {
return rv;
}
CIRCLEQ_FOREACH(mp2, &mp->childPhdrList, elemChildPhdr) {
void *rv = f(me, mp2, aux1, aux2);
if (rv) {
return rv;
}
}
}
return NULL;
}
/* Counting */
static void* subCounter(ElfuElf *me, ElfuPhdr *mp, void *aux1, void *aux2)
{
size_t *i = (size_t*)aux1;
(void)aux2;
*i += 1;
/* Continue */
return NULL;
}
size_t elfu_mPhdrCount(ElfuElf *me)
{
size_t i = 0;
assert(me);
elfu_mPhdrForall(me, subCounter, &i, NULL);
return i;
}
/* Layout update */
void elfu_mPhdrUpdateChildOffsets(ElfuPhdr *mp)
{
ElfuScn *ms;
ElfuPhdr *mpc;
assert(mp);
assert(mp->phdr.p_type == PT_LOAD);
CIRCLEQ_FOREACH(mpc, &mp->childPhdrList, elemChildPhdr) {
mpc->phdr.p_offset = mp->phdr.p_offset + (mpc->phdr.p_vaddr - mp->phdr.p_vaddr);
}
CIRCLEQ_FOREACH(ms, &mp->childScnList, elemChildScn) {
ms->shdr.sh_offset = mp->phdr.p_offset + (ms->shdr.sh_addr - mp->phdr.p_vaddr);
}
}
/*
* Allocation, destruction
*/
ElfuPhdr* elfu_mPhdrAlloc()
{
ElfuPhdr *mp;
mp = malloc(sizeof(ElfuPhdr));
if (!mp) {
ELFU_WARN("mPhdrAlloc: malloc() failed for ElfuPhdr.\n");
return NULL;
}
memset(mp, 0, sizeof(*mp));
CIRCLEQ_INIT(&mp->childScnList);
CIRCLEQ_INIT(&mp->childPhdrList);
return mp;
}
void elfu_mPhdrDestroy(ElfuPhdr* mp)
{
ElfuPhdr *mp2;
ElfuScn *ms;
assert(mp);
CIRCLEQ_FOREACH(mp2, &mp->childPhdrList, elem) {
CIRCLEQ_REMOVE(&mp->childPhdrList, mp2, elem);
elfu_mPhdrDestroy(mp2);
}
CIRCLEQ_FOREACH(ms, &mp->childScnList, elem) {
CIRCLEQ_REMOVE(&mp->childScnList, ms, elem);
elfu_mScnDestroy(ms);
}
free(mp);
}
|
