2 * Copyright 1996-1998 John D. Polstra.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 * $FreeBSD: src/sys/i386/i386/elf_machdep.c,v 1.8 1999/12/21 11:14:02 eivind Exp $
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/linker.h>
31 #include <machine/elf.h>
33 /* Process one elf relocation with addend. */
35 elf_reloc(linker_file_t lf, const void *data, int type, const char *sym)
37 Elf_Addr relocbase = (Elf_Addr) lf->address;
47 rel = (const Elf_Rel *)data;
48 where = (Elf_Addr *) (relocbase + rel->r_offset);
50 rtype = ELF_R_TYPE(rel->r_info);
53 rela = (const Elf_Rela *)data;
54 where = (Elf_Addr *) (relocbase + rela->r_offset);
55 addend = rela->r_addend;
56 rtype = ELF_R_TYPE(rela->r_info);
59 panic("unknown reloc type %d\n", type);
64 case R_386_NONE: /* none */
67 case R_386_32: /* S + A */
70 addr = (Elf_Addr)linker_file_lookup_symbol(lf, sym, 1);
78 case R_386_PC32: /* S + A - P */
81 addr = (Elf_Addr)linker_file_lookup_symbol(lf, sym, 1);
84 addr += addend - (Elf_Addr)where;
89 case R_386_COPY: /* none */
91 * There shouldn't be copy relocations in kernel
94 printf("kldload: unexpected R_COPY relocation\n");
98 case R_386_GLOB_DAT: /* S */
101 addr = (Elf_Addr)linker_file_lookup_symbol(lf, sym, 1);
108 case R_386_RELATIVE: /* B + A */
109 addr = relocbase + addend;
115 printf("kldload: unexpected relocation type %d\n",