Annotation of prex/boot/arm/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:
30: #include <boot.h>
31: #include <sys/elf.h>
32: #include <prex/bootinfo.h>
33: #include <platform.h>
34:
35: #ifdef DEBUG_ELF
36: #define DPRINTF(a) printf a
37: #else
38: #define DPRINTF(a)
39: #endif
40:
41: int
42: relocate_rel(Elf32_Rel *rel, Elf32_Addr sym_val, char *target_sect)
43: {
44: Elf32_Addr *where, tmp;
45: Elf32_Sword addend;
46:
47: where = (Elf32_Addr *)(target_sect + rel->r_offset);
48:
49: switch (ELF32_R_TYPE(rel->r_info)) {
50: case R_ARM_NONE:
51: break;
52: case R_ARM_ABS32:
53: *where += (Elf32_Addr)phys_to_virt(sym_val);
54: DPRINTF(("R_ARM_ABS32: %x -> %x\n", where, *where));
55: break;
56: case R_ARM_PC24:
57: case R_ARM_PLT32:
58: case R_ARM_CALL:
59: case R_ARM_JUMP24:
60: addend = *where & 0x00ffffff;
61: if (addend & 0x00800000)
62: addend |= 0xff000000;
63: tmp = sym_val - (Elf32_Addr)where + (addend << 2);
64: tmp >>= 2;
65: *where = (*where & 0xff000000) | (tmp & 0x00ffffff);
66: DPRINTF(("R_ARM_PC24: %x -> %x\n", where, *where));
67: break;
68: default:
69: panic("relocation fail");
70: return -1;
71: }
72: return 0;
73: }
74:
75: int
76: relocate_rela(Elf32_Rela *rela, Elf32_Addr sym_val, char *target_sec)
77: {
78:
79: panic("invalid relocation type");
80: return -1;
81: }
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