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.
28 #include <sys/param.h>
29 #include <sys/kernel.h>
30 #include <sys/systm.h>
31 #include <sys/linker.h>
32 #include <sys/sysent.h>
33 #include <sys/imgact_elf.h>
34 #include <sys/syscall.h>
35 #include <sys/signalvar.h>
36 #include <sys/vnode.h>
37 #include <machine/elf.h>
38 #include <machine/md_var.h>
40 struct sysentvec elf32_freebsd_sysvec = {
60 static Elf32_Brandinfo freebsd_brand_info = {
65 "/usr/libexec/ld-elf.so.1",
69 SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_ANY,
70 (sysinit_cfunc_t) elf32_insert_brand_entry,
73 /* Process one elf relocation with addend. */
75 elf_reloc(linker_file_t lf, const void *data, int type)
77 Elf_Addr relocbase = (Elf_Addr) lf->address;
81 Elf_Word rtype, symidx;
87 rel = (const Elf_Rel *)data;
88 where = (Elf_Addr *) (relocbase + rel->r_offset);
90 rtype = ELF_R_TYPE(rel->r_info);
91 symidx = ELF_R_SYM(rel->r_info);
94 rela = (const Elf_Rela *)data;
95 where = (Elf_Addr *) (relocbase + rela->r_offset);
96 addend = rela->r_addend;
97 rtype = ELF_R_TYPE(rela->r_info);
98 symidx = ELF_R_SYM(rela->r_info);
101 panic("unknown reloc type %d\n", type);
106 case R_386_NONE: /* none */
109 case R_386_32: /* S + A */
110 addr = elf_lookup(lf, symidx, 1);
118 case R_386_PC32: /* S + A - P */
119 addr = elf_lookup(lf, symidx, 1);
122 addr += addend - (Elf_Addr)where;
127 case R_386_COPY: /* none */
129 * There shouldn't be copy relocations in kernel
132 printf("kldload: unexpected R_COPY relocation\n");
136 case R_386_GLOB_DAT: /* S */
137 addr = elf_lookup(lf, symidx, 1);
144 case R_386_RELATIVE: /* B + A */
145 addr = relocbase + addend;
151 printf("kldload: unexpected relocation type %d\n",