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,
49 .sv_fixup = __elfN(dragonfly_fixup),
50 .sv_sendsig = sendsig,
51 .sv_sigcode = sigcode,
52 .sv_szsigcode = &szsigcode,
53 .sv_prepsyscall = NULL,
54 .sv_name = "DragonFly ELF64",
55 .sv_coredump = __elfN(coredump),
56 .sv_imgact_try = NULL,
57 .sv_minsigstksz = MINSIGSTKSZ,
60 static Elf64_Brandinfo dragonfly_brand_info = {
61 .brand = ELFOSABI_NONE,
63 .compat_3_brand = "DragonFly",
65 .interp_path = "/usr/libexec/ld-elf.so.2",
66 .sysvec = &elf64_dragonfly_sysvec,
67 .interp_newpath = NULL,
68 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
69 .brand_note = &elf64_dragonfly_brandnote,
72 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
73 (sysinit_cfunc_t) elf64_insert_brand_entry,
74 &dragonfly_brand_info);
76 /* Process one elf relocation with addend. */
78 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
79 int type, int local, elf_lookup_fn lookup)
81 Elf64_Addr *where, val;
82 Elf32_Addr *where32, val32;
85 Elf_Size rtype, symidx;
91 rel = (const Elf_Rel *)data;
92 where = (Elf_Addr *) (relocbase + rel->r_offset);
93 rtype = ELF_R_TYPE(rel->r_info);
94 symidx = ELF_R_SYM(rel->r_info);
95 /* Addend is 32 bit on 32 bit relocs */
100 addend = *(Elf32_Addr *)where;
108 rela = (const Elf_Rela *)data;
109 where = (Elf_Addr *) (relocbase + rela->r_offset);
110 addend = rela->r_addend;
111 rtype = ELF_R_TYPE(rela->r_info);
112 symidx = ELF_R_SYM(rela->r_info);
115 panic("unknown reloc type %d\n", type);
120 case R_X86_64_NONE: /* none */
123 case R_X86_64_64: /* S + A */
124 if (lookup(lf, symidx, 1, &addr))
131 case R_X86_64_PC32: /* S + A - P */
132 if (lookup(lf, symidx, 1, &addr))
134 where32 = (Elf32_Addr *)where;
135 val32 = (Elf32_Addr)(addr + addend - (Elf_Addr)where);
136 if (*where32 != val32)
140 case R_X86_64_32: /* S + A zero extend */
141 case R_X86_64_32S: /* S + A sign extend */
142 if (lookup(lf, symidx, 1, &addr))
144 val32 = (Elf32_Addr)(addr + addend);
145 where32 = (Elf32_Addr *)where;
146 if (*where32 != val32)
150 case R_X86_64_COPY: /* none */
152 * There shouldn't be copy relocations in kernel
155 kprintf("kldload: unexpected R_COPY relocation\n");
159 case R_X86_64_GLOB_DAT: /* S */
160 case R_X86_64_JMP_SLOT: /* XXX need addend + offset */
161 if (lookup(lf, symidx, 1, &addr))
167 case R_X86_64_RELATIVE: /* B + A */
168 addr = relocbase + addend;
175 kprintf("kldload: unexpected relocation type %ld\n",
183 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
184 elf_lookup_fn lookup)
187 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
191 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
192 int type, elf_lookup_fn lookup)
195 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));