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>
36 #include <sys/sysent.h>
37 #include <sys/imgact_elf.h>
38 #include <sys/syscall.h>
39 #include <sys/signalvar.h>
40 #include <sys/vnode.h>
44 #include <vm/vm_param.h>
46 #include <machine/elf.h>
47 #include <machine/md_var.h>
49 struct sysentvec elf64_freebsd_sysvec = {
50 .sv_size = SYS_MAXSYSCALL,
58 .sv_fixup = __elfN(freebsd_fixup),
59 .sv_sendsig = sendsig,
60 .sv_sigcode = sigcode,
61 .sv_szsigcode = &szsigcode,
62 .sv_prepsyscall = NULL,
63 .sv_name = "FreeBSD ELF64",
64 .sv_coredump = __elfN(coredump),
65 .sv_imgact_try = NULL,
66 .sv_minsigstksz = MINSIGSTKSZ,
67 .sv_pagesize = PAGE_SIZE,
68 .sv_minuser = VM_MIN_ADDRESS,
69 .sv_maxuser = VM_MAXUSER_ADDRESS,
70 .sv_usrstack = USRSTACK,
71 .sv_psstrings = PS_STRINGS,
72 .sv_stackprot = VM_PROT_ALL,
73 .sv_copyout_strings = exec_copyout_strings,
74 .sv_setregs = exec_setregs,
77 .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP,
78 .sv_set_syscall_retval = cpu_set_syscall_retval,
79 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
80 .sv_syscallnames = syscallnames,
81 .sv_shared_page_base = SHAREDPAGE,
82 .sv_shared_page_len = PAGE_SIZE,
85 INIT_SYSENTVEC(elf64_sysvec, &elf64_freebsd_sysvec);
87 static Elf64_Brandinfo freebsd_brand_info = {
88 .brand = ELFOSABI_FREEBSD,
90 .compat_3_brand = "FreeBSD",
92 .interp_path = "/libexec/ld-elf.so.1",
93 .sysvec = &elf64_freebsd_sysvec,
94 .interp_newpath = NULL,
95 .brand_note = &elf64_freebsd_brandnote,
96 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
99 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
100 (sysinit_cfunc_t) elf64_insert_brand_entry,
101 &freebsd_brand_info);
103 static Elf64_Brandinfo freebsd_brand_oinfo = {
104 .brand = ELFOSABI_FREEBSD,
105 .machine = EM_X86_64,
106 .compat_3_brand = "FreeBSD",
108 .interp_path = "/usr/libexec/ld-elf.so.1",
109 .sysvec = &elf64_freebsd_sysvec,
110 .interp_newpath = NULL,
111 .brand_note = &elf64_freebsd_brandnote,
112 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
115 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
116 (sysinit_cfunc_t) elf64_insert_brand_entry,
117 &freebsd_brand_oinfo);
119 static Elf64_Brandinfo kfreebsd_brand_info = {
120 .brand = ELFOSABI_FREEBSD,
121 .machine = EM_X86_64,
122 .compat_3_brand = "FreeBSD",
124 .interp_path = "/lib/ld-kfreebsd-x86-64.so.1",
125 .sysvec = &elf64_freebsd_sysvec,
126 .interp_newpath = NULL,
127 .brand_note = &elf64_kfreebsd_brandnote,
128 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY
131 SYSINIT(kelf64, SI_SUB_EXEC, SI_ORDER_ANY,
132 (sysinit_cfunc_t) elf64_insert_brand_entry,
133 &kfreebsd_brand_info);
136 elf64_dump_thread(struct thread *td __unused, void *dst __unused,
137 size_t *off __unused)
142 /* Process one elf relocation with addend. */
144 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
145 int type, int local, elf_lookup_fn lookup)
147 Elf64_Addr *where, val;
148 Elf32_Addr *where32, val32;
151 Elf_Size rtype, symidx;
153 const Elf_Rela *rela;
157 rel = (const Elf_Rel *)data;
158 where = (Elf_Addr *) (relocbase + rel->r_offset);
159 rtype = ELF_R_TYPE(rel->r_info);
160 symidx = ELF_R_SYM(rel->r_info);
161 /* Addend is 32 bit on 32 bit relocs */
165 addend = *(Elf32_Addr *)where;
173 rela = (const Elf_Rela *)data;
174 where = (Elf_Addr *) (relocbase + rela->r_offset);
175 addend = rela->r_addend;
176 rtype = ELF_R_TYPE(rela->r_info);
177 symidx = ELF_R_SYM(rela->r_info);
180 panic("unknown reloc type %d\n", type);
185 case R_X86_64_NONE: /* none */
188 case R_X86_64_64: /* S + A */
189 addr = lookup(lf, symidx, 1);
197 case R_X86_64_PC32: /* S + A - P */
198 addr = lookup(lf, symidx, 1);
199 where32 = (Elf32_Addr *)where;
200 val32 = (Elf32_Addr)(addr + addend - (Elf_Addr)where);
203 if (*where32 != val32)
207 case R_X86_64_32S: /* S + A sign extend */
208 addr = lookup(lf, symidx, 1);
209 val32 = (Elf32_Addr)(addr + addend);
210 where32 = (Elf32_Addr *)where;
213 if (*where32 != val32)
217 case R_X86_64_COPY: /* none */
219 * There shouldn't be copy relocations in kernel
222 printf("kldload: unexpected R_COPY relocation\n");
226 case R_X86_64_GLOB_DAT: /* S */
227 case R_X86_64_JMP_SLOT: /* XXX need addend + offset */
228 addr = lookup(lf, symidx, 1);
235 case R_X86_64_RELATIVE: /* B + A */
236 addr = relocbase + addend;
243 printf("kldload: unexpected relocation type %ld\n",
251 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
252 elf_lookup_fn lookup)
255 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
259 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
260 int type, elf_lookup_fn lookup)
263 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
267 elf_cpu_load_file(linker_file_t lf __unused)
274 elf_cpu_unload_file(linker_file_t lf __unused)