Annotation of prex-old/usr/arch/arm/elf_reloc.c, Revision 1.1.1.1
1.1 nbrk 1: /*-
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: Elf32_Addr *where, tmp;
36: Elf32_Sword addend;
37:
38: where = (Elf32_Addr *)(target_sect + rel->r_offset);
39:
40: switch (ELF32_R_TYPE(rel->r_info)) {
41: case R_ARM_NONE:
42: break;
43: case R_ARM_ABS32:
44: *where += (Elf32_Addr)sym_val;
45: /* dbg("R_ARM_ABS32: %x -> %x\n", where, *where); */
46: break;
47: case R_ARM_PC24:
48: case R_ARM_PLT32:
49: case R_ARM_CALL:
50: case R_ARM_JUMP24:
51: addend = *where & 0x00ffffff;
52: if (addend & 0x00800000)
53: addend |= 0xff000000;
54: tmp = sym_val - (Elf32_Addr)where + (addend << 2);
55: tmp >>= 2;
56: *where = (*where & 0xff000000) | (tmp & 0x00ffffff);
57: /* dbg("R_ARM_PC24: %x -> %x\n", where, *where); */
58: break;
59: default:
60: syslog(LOG_INFO, "relocation fail type=%d\n", ELF32_R_TYPE(rel->r_info));
61: return -1;
62: }
63: return 0;
64: }
65:
66: int
67: relocate_rela(Elf32_Rela *rela, Elf32_Addr sym_val, char *target_sec)
68: {
69: /* dbg("Invalid relocation type\n"); */
70: return -1;
71: }
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