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
|
/*
* Copyright 2007 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/mm_types.h>
#include <linux/flat.h>
#define FLAT_BFIN_RELOC_TYPE_16_BIT 0
#define FLAT_BFIN_RELOC_TYPE_16H_BIT 1
#define FLAT_BFIN_RELOC_TYPE_32_BIT 2
unsigned long bfin_get_addr_from_rp(u32 *ptr,
u32 relval,
u32 flags,
u32 *persistent)
{
unsigned short *usptr = (unsigned short *)ptr;
int type = (relval >> 26) & 7;
u32 val;
switch (type) {
case FLAT_BFIN_RELOC_TYPE_16_BIT:
case FLAT_BFIN_RELOC_TYPE_16H_BIT:
usptr = (unsigned short *)ptr;
pr_debug("*usptr = %x", get_unaligned(usptr));
val = get_unaligned(usptr);
val += *persistent;
break;
case FLAT_BFIN_RELOC_TYPE_32_BIT:
pr_debug("*ptr = %lx", get_unaligned(ptr));
val = get_unaligned(ptr);
break;
default:
pr_debug("BINFMT_FLAT: Unknown relocation type %x\n", type);
return 0;
}
/*
* Stack-relative relocs contain the offset into the stack, we
* have to add the stack's start address here and return 1 from
* flat_addr_absolute to prevent the normal address calculations
*/
if (relval & (1 << 29))
return val + current->mm->context.end_brk;
if ((flags & FLAT_FLAG_GOTPIC) == 0)
val = htonl(val);
return val;
}
EXPORT_SYMBOL(bfin_get_addr_from_rp);
/*
* Insert the address ADDR into the symbol reference at RP;
* RELVAL is the raw relocation-table entry from which RP is derived
*/
void bfin_put_addr_at_rp(u32 *ptr, u32 addr, u32 relval)
{
unsigned short *usptr = (unsigned short *)ptr;
int type = (relval >> 26) & 7;
switch (type) {
case FLAT_BFIN_RELOC_TYPE_16_BIT:
put_unaligned(addr, usptr);
pr_debug("new value %x at %p", get_unaligned(usptr), usptr);
break;
case FLAT_BFIN_RELOC_TYPE_16H_BIT:
put_unaligned(addr >> 16, usptr);
pr_debug("new value %x", get_unaligned(usptr));
break;
case FLAT_BFIN_RELOC_TYPE_32_BIT:
put_unaligned(addr, ptr);
pr_debug("new ptr =%lx", get_unaligned(ptr));
break;
}
}
EXPORT_SYMBOL(bfin_put_addr_at_rp);
|
