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/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 static struct sysentvec elf64_dragonfly_sysvec = {
41 .sv_size = SYS_MAXSYSCALL,
48 .sv_fixup = __elfN(dragonfly_fixup),
49 .sv_sendsig = sendsig,
50 .sv_sigcode = sigcode,
51 .sv_szsigcode = &szsigcode,
52 .sv_name = "DragonFly ELF64",
53 .sv_coredump = __elfN(coredump),
54 .sv_imgact_try = NULL,
55 .sv_minsigstksz = MINSIGSTKSZ,
58 static Elf64_Brandinfo dragonfly_brand_info = {
59 .brand = ELFOSABI_NONE,
61 .compat_3_brand = "DragonFly",
63 .interp_path = "/libexec/ld-elf.so.2",
64 .sysvec = &elf64_dragonfly_sysvec,
65 .interp_newpath = NULL,
66 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
67 .brand_note = &elf64_dragonfly_brandnote,
70 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
71 (sysinit_cfunc_t) elf64_insert_brand_entry,
72 &dragonfly_brand_info);
74 static Elf64_Brandinfo freebsd_brand_info = {
75 .brand = ELFOSABI_FREEBSD,
77 .compat_3_brand = "FreeBSD",
79 .interp_path = "/usr/libexec/ld-elf.so.1",
80 .sysvec = &elf64_dragonfly_sysvec,
81 .interp_newpath = NULL,
82 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
83 .brand_note = &elf64_freebsd_brandnote,
86 SYSINIT(elf64_fbsd, SI_SUB_EXEC, SI_ORDER_ANY,
87 (sysinit_cfunc_t) elf64_insert_brand_entry,
90 /* Process one elf relocation with addend. */
92 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
93 int type, int local, elf_lookup_fn lookup)
95 Elf64_Addr *where, val;
96 Elf32_Addr *where32, val32;
99 Elf_Size rtype, symidx;
101 const Elf_Rela *rela;
105 rel = (const Elf_Rel *)data;
106 where = (Elf_Addr *) (relocbase + rel->r_offset);
107 rtype = ELF_R_TYPE(rel->r_info);
108 symidx = ELF_R_SYM(rel->r_info);
109 /* Addend is 32 bit on 32 bit relocs */
114 addend = *(Elf32_Addr *)where;
122 rela = (const Elf_Rela *)data;
123 where = (Elf_Addr *) (relocbase + rela->r_offset);
124 addend = rela->r_addend;
125 rtype = ELF_R_TYPE(rela->r_info);
126 symidx = ELF_R_SYM(rela->r_info);
129 panic("unknown reloc type %d", type);
134 case R_X86_64_NONE: /* none */
137 case R_X86_64_64: /* S + A */
138 if (lookup(lf, symidx, 1, &addr))
145 case R_X86_64_PC32: /* S + A - P */
146 if (lookup(lf, symidx, 1, &addr))
148 where32 = (Elf32_Addr *)where;
149 val32 = (Elf32_Addr)(addr + addend - (Elf_Addr)where);
150 if (*where32 != val32)
154 case R_X86_64_32: /* S + A zero extend */
155 case R_X86_64_32S: /* S + A sign extend */
156 if (lookup(lf, symidx, 1, &addr))
158 val32 = (Elf32_Addr)(addr + addend);
159 where32 = (Elf32_Addr *)where;
160 if (*where32 != val32)
164 case R_X86_64_COPY: /* none */
166 * There shouldn't be copy relocations in kernel
169 kprintf("kldload: unexpected R_COPY relocation\n");
173 case R_X86_64_GLOB_DAT: /* S */
174 case R_X86_64_JMP_SLOT: /* XXX need addend + offset */
175 if (lookup(lf, symidx, 1, &addr))
181 case R_X86_64_RELATIVE: /* B + A */
182 addr = relocbase + addend;
189 kprintf("kldload: unexpected relocation type %ld\n",
197 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
198 elf_lookup_fn lookup)
201 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
205 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
206 int type, elf_lookup_fn lookup)
209 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));