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
123
124
125
126
127
128
129
130
|
#include <sys/cdefs.h>
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <rtems/rtl/rtl.h>
#include "rtl-elf.h"
#include "rtl-error.h"
#include <rtems/rtl/rtl-trace.h>
#include "rtl-unwind.h"
#include "rtl-unwind-dw2.h"
uint32_t
rtems_rtl_elf_section_flags (const rtems_rtl_obj* obj,
const Elf_Shdr* shdr)
{
return 0;
}
bool
rtems_rtl_elf_rel_resolve_sym (Elf_Word type)
{
return true;
}
bool
rtems_rtl_elf_relocate_rela (const rtems_rtl_obj* obj,
const Elf_Rela* rela,
const rtems_rtl_obj_sect* sect,
const char* symname,
const Elf_Byte syminfo,
const Elf_Word symvalue)
{
Elf_Addr *where;
Elf_Word tmp;
where = (Elf_Addr *)(sect->base + rela->r_offset);
if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) {
printf("rela relocation type is %ld\n", ELF_R_TYPE(rela->r_info));
printf("relocated address 0x%08lx\n", (Elf_Addr)where);
}
tmp = symvalue;
switch (ELF_R_TYPE(rela->r_info)) {
case R_TYPE(NONE):
break;
case R_TYPE(DIR16):
*(uint16_t *)where += symvalue + rela->r_addend;
break;
case R_TYPE(DIR32):
case R_TYPE(DIR32A16):
*where += symvalue + rela->r_addend;
break;
case R_TYPE(DIR24A8):
if (ELF32_R_SYM(rela->r_info))
*where += symvalue + rela->r_addend;
break;
case R_TYPE(DIR24R8):
where = (uint32_t *)((uint32_t)where - 1);
*where = (*where & 0xff000000) | ((*where & 0xffffff) + symvalue + rela->r_addend);
break;
case R_TYPE(PCREL8):
/* bcc instruction */
tmp = symvalue + rela->r_addend - (Elf_Addr)where - 1;
if (((Elf32_Sword)tmp > 0x7f) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x80)){
printf("PCREL8 overflow\n");
return false;
} else {
*(uint8_t *)where = tmp;
}
break;
case R_TYPE(PCREL16):
/* bcc instruction */
tmp = symvalue + rela->r_addend - (Elf_Addr)where - 2;
if (((Elf32_Sword)tmp > 0x7fff) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x8000)){
printf("PCREL16 overflow\n");
return false;
} else {
*(uint16_t *)where = tmp;
}
break;
default:
rtems_rtl_set_error (EINVAL, "rela type record not supported");
printf("Unsupported reloc types\n");
return false;
}
return true;
}
bool
rtems_rtl_elf_relocate_rel (const rtems_rtl_obj* obj,
const Elf_Rel* rel,
const rtems_rtl_obj_sect* sect,
const char* symname,
const Elf_Byte syminfo,
const Elf_Word symvalue)
{
rtems_rtl_set_error (EINVAL, "rel type record not supported");
return false;
}
bool
rtems_rtl_elf_unwind_parse (const rtems_rtl_obj* obj,
const char* name,
uint32_t flags)
{
return rtems_rtl_elf_unwind_dw2_parse (obj, name, flags);
}
bool
rtems_rtl_elf_unwind_register (rtems_rtl_obj* obj)
{
return rtems_rtl_elf_unwind_dw2_register (obj);
}
bool
rtems_rtl_elf_unwind_deregister (rtems_rtl_obj* obj)
{
return rtems_rtl_elf_unwind_dw2_deregister (obj);
}
|
