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.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/kernel.h>
31 #include <sys/systm.h>
33 #include <sys/imgact.h>
34 #include <sys/linker.h>
35 #include <sys/sysent.h>
36 #include <sys/imgact_elf.h>
37 #include <sys/syscall.h>
38 #include <sys/signalvar.h>
39 #include <sys/vnode.h>
43 #include <vm/vm_param.h>
45 #include <machine/elf.h>
46 #include <machine/md_var.h>
48 struct sysentvec elf64_freebsd_sysvec = {
49 .sv_size = SYS_MAXSYSCALL,
57 .sv_fixup = __elfN(freebsd_fixup),
58 .sv_sendsig = sendsig,
59 .sv_sigcode = sigcode,
60 .sv_szsigcode = &szsigcode,
61 .sv_prepsyscall = NULL,
62 .sv_name = "FreeBSD ELF64",
63 .sv_coredump = __elfN(coredump),
64 .sv_imgact_try = NULL,
65 .sv_minsigstksz = MINSIGSTKSZ,
66 .sv_pagesize = PAGE_SIZE,
67 .sv_minuser = VM_MIN_ADDRESS,
68 .sv_maxuser = VM_MAXUSER_ADDRESS,
69 .sv_usrstack = USRSTACK,
70 .sv_psstrings = PS_STRINGS,
71 .sv_stackprot = VM_PROT_ALL,
72 .sv_copyout_strings = exec_copyout_strings,
73 .sv_setregs = exec_setregs,
78 static Elf64_Brandinfo freebsd_brand_info = {
79 .brand = ELFOSABI_FREEBSD,
81 .compat_3_brand = "FreeBSD",
83 .interp_path = "/libexec/ld-elf.so.1",
84 .sysvec = &elf64_freebsd_sysvec,
85 .interp_newpath = NULL,
86 .brand_note = &elf64_freebsd_brandnote,
87 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
90 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_ANY,
91 (sysinit_cfunc_t) elf64_insert_brand_entry,
94 static Elf64_Brandinfo freebsd_brand_oinfo = {
95 .brand = ELFOSABI_FREEBSD,
97 .compat_3_brand = "FreeBSD",
99 .interp_path = "/usr/libexec/ld-elf.so.1",
100 .sysvec = &elf64_freebsd_sysvec,
101 .interp_newpath = NULL,
102 .brand_note = &elf64_freebsd_brandnote,
103 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
106 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
107 (sysinit_cfunc_t) elf64_insert_brand_entry,
108 &freebsd_brand_oinfo);
112 elf64_dump_thread(struct thread *td __unused, void *dst __unused,
113 size_t *off __unused)
118 /* Process one elf relocation with addend. */
120 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
121 int type, int local, elf_lookup_fn lookup)
123 Elf64_Addr *where, val;
124 Elf32_Addr *where32, val32;
127 Elf_Size rtype, symidx;
129 const Elf_Rela *rela;
133 rel = (const Elf_Rel *)data;
134 where = (Elf_Addr *) (relocbase + rel->r_offset);
135 rtype = ELF_R_TYPE(rel->r_info);
136 symidx = ELF_R_SYM(rel->r_info);
137 /* Addend is 32 bit on 32 bit relocs */
141 addend = *(Elf32_Addr *)where;
149 rela = (const Elf_Rela *)data;
150 where = (Elf_Addr *) (relocbase + rela->r_offset);
151 addend = rela->r_addend;
152 rtype = ELF_R_TYPE(rela->r_info);
153 symidx = ELF_R_SYM(rela->r_info);
156 panic("unknown reloc type %d\n", type);
161 case R_X86_64_NONE: /* none */
164 case R_X86_64_64: /* S + A */
165 addr = lookup(lf, symidx, 1);
173 case R_X86_64_PC32: /* S + A - P */
174 addr = lookup(lf, symidx, 1);
175 where32 = (Elf32_Addr *)where;
176 val32 = (Elf32_Addr)(addr + addend - (Elf_Addr)where);
179 if (*where32 != val32)
183 case R_X86_64_32S: /* S + A sign extend */
184 addr = lookup(lf, symidx, 1);
185 val32 = (Elf32_Addr)(addr + addend);
186 where32 = (Elf32_Addr *)where;
189 if (*where32 != val32)
193 case R_X86_64_COPY: /* none */
195 * There shouldn't be copy relocations in kernel
198 printf("kldload: unexpected R_COPY relocation\n");
202 case R_X86_64_GLOB_DAT: /* S */
203 case R_X86_64_JMP_SLOT: /* XXX need addend + offset */
204 addr = lookup(lf, symidx, 1);
211 case R_X86_64_RELATIVE: /* B + A */
212 addr = relocbase + addend;
219 printf("kldload: unexpected relocation type %ld\n",
227 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
228 elf_lookup_fn lookup)
231 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
235 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
236 int type, elf_lookup_fn lookup)
239 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
243 elf_cpu_load_file(linker_file_t lf __unused)
250 elf_cpu_unload_file(linker_file_t lf __unused)