root / prex-0.9.0 / usr / arch / ppc / elf_reloc.c @ 03e9c04a
History | View | Annotate | Download (2.84 KB)
1 | 03e9c04a | Brad Neuman | /*-
|
---|---|---|---|
2 | * Copyright (c) 2006, Kohsuke Ohtani
|
||
3 | * All rights reserved.
|
||
4 | *
|
||
5 | * Redistribution and use in source and binary forms, with or without
|
||
6 | * modification, are permitted provided that the following conditions
|
||
7 | * are met:
|
||
8 | * 1. Redistributions of source code must retain the above copyright
|
||
9 | * notice, this list of conditions and the following disclaimer.
|
||
10 | * 2. Redistributions in binary form must reproduce the above copyright
|
||
11 | * notice, this list of conditions and the following disclaimer in the
|
||
12 | * documentation and/or other materials provided with the distribution.
|
||
13 | * 3. Neither the name of the author nor the names of any co-contributors
|
||
14 | * may be used to endorse or promote products derived from this software
|
||
15 | * without specific prior written permission.
|
||
16 | *
|
||
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
27 | * SUCH DAMAGE.
|
||
28 | */
|
||
29 | #include <sys/elf.h> |
||
30 | #include <sys/syslog.h> |
||
31 | |||
32 | int
|
||
33 | relocate_rel(Elf32_Rel *rel, Elf32_Addr sym_val, char *target_sect)
|
||
34 | { |
||
35 | |||
36 | /* printf("Invalid relocation type\n"); */
|
||
37 | return -1; |
||
38 | } |
||
39 | |||
40 | int
|
||
41 | relocate_rela(Elf32_Rela *rela, Elf32_Addr sym_val, char *target_sect)
|
||
42 | { |
||
43 | Elf32_Addr *where; |
||
44 | uint32_t val; |
||
45 | |||
46 | where = (Elf32_Addr *)(target_sect + rela->r_offset); |
||
47 | val = sym_val + rela->r_addend; |
||
48 | |||
49 | switch (ELF32_R_TYPE(rela->r_info)) {
|
||
50 | case R_PPC_NONE:
|
||
51 | break;
|
||
52 | case R_PPC_ADDR32:
|
||
53 | /* printf("R_PPC_ADDR32\n"); */
|
||
54 | *(uint32_t *)where = val; |
||
55 | break;
|
||
56 | case R_PPC_ADDR16_LO:
|
||
57 | /* printf("R_PPC_ADDR16_LO\n"); */
|
||
58 | *(uint16_t *)where = val; |
||
59 | break;
|
||
60 | case R_PPC_ADDR16_HI:
|
||
61 | /* printf("R_PPC_ADDR16_HI\n"); */
|
||
62 | *(uint16_t *)where = (val >> 16);
|
||
63 | break;
|
||
64 | case R_PPC_ADDR16_HA:
|
||
65 | /* printf("R_PPC_ADDR16_HA\n"); */
|
||
66 | *(uint16_t *)where = (val + 0x8000) >> 16; |
||
67 | break;
|
||
68 | case R_PPC_REL24:
|
||
69 | /* printf("R_PPC_REL24\n"); */
|
||
70 | *(uint32_t *)where = |
||
71 | (*(uint32_t *)where & ~0x03fffffc)
|
||
72 | | ((val - (uint32_t)where) |
||
73 | & 0x03fffffc);
|
||
74 | break;
|
||
75 | case R_PPC_REL32:
|
||
76 | /* printf("R_PPC_REL32\n"); */
|
||
77 | *(uint32_t *)where = val - (uint32_t)where; |
||
78 | break;
|
||
79 | default:
|
||
80 | /* printf("Unkown relocation type=%d\n",
|
||
81 | ELF32_R_TYPE(rela->r_info)); */
|
||
82 | #ifdef DEBUG
|
||
83 | syslog(LOG_ERR, "relocation fail type=%d\n", ELF32_R_TYPE(rela->r_info));
|
||
84 | #endif
|
||
85 | return -1; |
||
86 | } |
||
87 | return 0; |
||
88 | } |