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
|
#include "mm_aspace.h"
#include <rtthread.h>
#include <stdint.h>
#include <string.h>
#include <lwp_elf.h>
#ifdef ARCH_MM_MMU
#include <mmu.h>
#include <page.h>
#endif
typedef struct
{
Elf32_Word st_name;
Elf32_Addr st_value;
Elf32_Word st_size;
unsigned char st_info;
unsigned char st_other;
Elf32_Half st_shndx;
} Elf32_sym;
#ifdef ARCH_MM_MMU
void arch_elf_reloc(rt_aspace_t aspace, void *text_start, void *rel_dyn_start, size_t rel_dyn_size, void *got_start, size_t got_size, Elf32_sym *dynsym)
{
size_t rel_off;
void* addr;
if (rel_dyn_size && !dynsym)
{
return;
}
for (rel_off = 0; rel_off < rel_dyn_size; rel_off += 8)
{
uint32_t v1, v2;
/*
memcpy(&v1, rel_dyn_start + rel_off, 4);
memcpy(&v2, rel_dyn_start + rel_off + 4, 4);
*/
addr = rt_hw_mmu_v2p(aspace, (void*)((char*)rel_dyn_start + rel_off));
addr = (void*)((char*)addr - PV_OFFSET);
memcpy(&v1, addr, 4);
addr = rt_hw_mmu_v2p(aspace, (void*)((char*)rel_dyn_start + rel_off + 4));
addr = (void*)((char*)addr - PV_OFFSET);
memcpy(&v2, addr, 4);
addr = rt_hw_mmu_v2p(aspace, (void*)((char*)text_start + v1));
addr = (void*)((char*)addr - PV_OFFSET);
if ((v2 & 0xff) == R_ARM_RELATIVE)
{
// *(uint32_t*)(text_start + v1) += (uint32_t)text_start;
*(uint32_t*)addr += (uint32_t)text_start;
}
else if ((v2 & 0xff) == R_ARM_ABS32)
{
uint32_t t;
t = (v2 >> 8);
if (t) /* 0 is UDF */
{
// *(uint32_t*)(text_start + v1) = (uint32_t)(text_start + dynsym[t].st_value);
*(uint32_t*)addr = (uint32_t)((char*)text_start + dynsym[t].st_value);
}
}
}
/* modify got */
if (got_size)
{
uint32_t *got_item = (uint32_t*)got_start;
for (rel_off = 0; rel_off < got_size; rel_off += 4, got_item++)
{
//*got_item += (uint32_t)text_start;
addr = rt_hw_mmu_v2p(aspace, got_item);
addr = (void*)((char*)addr - PV_OFFSET);
*(uint32_t *)addr += (uint32_t)text_start;
}
}
}
#else
void arch_elf_reloc(void *text_start, void *rel_dyn_start, size_t rel_dyn_size, void *got_start, size_t got_size, Elf32_sym *dynsym)
{
size_t rel_off;
if (rel_dyn_size && !dynsym)
{
return;
}
for (rel_off = 0; rel_off < rel_dyn_size; rel_off += 8)
{
uint32_t v1, v2;
memcpy(&v1, (void*)((char*)rel_dyn_start + rel_off), 4);
memcpy(&v2, (void*)((char*)rel_dyn_start + rel_off + 4), 4);
if ((v2 & 0xff) == R_ARM_RELATIVE)
{
*(uint32_t*)((char*)text_start + v1) += (uint32_t)text_start;
}
else if ((v2 & 0xff) == R_ARM_ABS32)
{
uint32_t t;
t = (v2 >> 8);
if (t) /* 0 is UDF */
{
*(uint32_t*)((char*)text_start + v1) = (uint32_t)((char*)text_start + dynsym[t].st_value);
}
}
}
/* modify got */
if (got_size)
{
uint32_t *got_item = (uint32_t*)got_start;
for (rel_off = 0; rel_off < got_size; rel_off += 4, got_item++)
{
*got_item += (uint32_t)text_start;
}
}
}
#endif
|
