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/sysent.h>
40 #include <sys/signalvar.h>
41 #include <sys/vnode.h>
45 #include <vm/vm_param.h>
47 #include <machine/elf.h>
48 #include <machine/md_var.h>
50 struct sysentvec elf64_freebsd_sysvec = {
51 .sv_size = SYS_MAXSYSCALL,
59 .sv_fixup = __elfN(freebsd_fixup),
60 .sv_sendsig = sendsig,
61 .sv_sigcode = sigcode,
62 .sv_szsigcode = &szsigcode,
63 .sv_prepsyscall = NULL,
64 .sv_name = "FreeBSD ELF64",
65 .sv_coredump = __elfN(coredump),
66 .sv_imgact_try = NULL,
67 .sv_minsigstksz = MINSIGSTKSZ,
68 .sv_pagesize = PAGE_SIZE,
69 .sv_minuser = VM_MIN_ADDRESS,
70 .sv_maxuser = VM_MAXUSER_ADDRESS,
71 .sv_usrstack = USRSTACK,
72 .sv_psstrings = PS_STRINGS,
73 .sv_stackprot = VM_PROT_ALL,
74 .sv_copyout_strings = exec_copyout_strings,
75 .sv_setregs = exec_setregs,
78 .sv_flags = SV_ABI_FREEBSD | SV_LP64,
79 .sv_set_syscall_retval = cpu_set_syscall_retval,
80 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
81 .sv_syscallnames = syscallnames,
84 static Elf64_Brandinfo freebsd_brand_info = {
85 .brand = ELFOSABI_FREEBSD,
87 .compat_3_brand = "FreeBSD",
89 .interp_path = "/libexec/ld-elf.so.1",
90 .sysvec = &elf64_freebsd_sysvec,
91 .interp_newpath = NULL,
92 .brand_note = &elf64_freebsd_brandnote,
93 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
96 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
97 (sysinit_cfunc_t) elf64_insert_brand_entry,
100 static Elf64_Brandinfo freebsd_brand_oinfo = {
101 .brand = ELFOSABI_FREEBSD,
102 .machine = EM_X86_64,
103 .compat_3_brand = "FreeBSD",
105 .interp_path = "/usr/libexec/ld-elf.so.1",
106 .sysvec = &elf64_freebsd_sysvec,
107 .interp_newpath = NULL,
108 .brand_note = &elf64_freebsd_brandnote,
109 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
112 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
113 (sysinit_cfunc_t) elf64_insert_brand_entry,
114 &freebsd_brand_oinfo);
116 static Elf64_Brandinfo kfreebsd_brand_info = {
117 .brand = ELFOSABI_FREEBSD,
118 .machine = EM_X86_64,
119 .compat_3_brand = "FreeBSD",
121 .interp_path = "/lib/ld-kfreebsd-x86-64.so.1",
122 .sysvec = &elf64_freebsd_sysvec,
123 .interp_newpath = NULL,
124 .brand_note = &elf64_kfreebsd_brandnote,
125 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY
128 SYSINIT(kelf64, SI_SUB_EXEC, SI_ORDER_ANY,
129 (sysinit_cfunc_t) elf64_insert_brand_entry,
130 &kfreebsd_brand_info);
134 elf64_dump_thread(struct thread *td __unused, void *dst __unused,
135 size_t *off __unused)
140 /* Process one elf relocation with addend. */
142 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
143 int type, int local, elf_lookup_fn lookup)
145 Elf64_Addr *where, val;
146 Elf32_Addr *where32, val32;
149 Elf_Size rtype, symidx;
151 const Elf_Rela *rela;
155 rel = (const Elf_Rel *)data;
156 where = (Elf_Addr *) (relocbase + rel->r_offset);
157 rtype = ELF_R_TYPE(rel->r_info);
158 symidx = ELF_R_SYM(rel->r_info);
159 /* Addend is 32 bit on 32 bit relocs */
163 addend = *(Elf32_Addr *)where;
171 rela = (const Elf_Rela *)data;
172 where = (Elf_Addr *) (relocbase + rela->r_offset);
173 addend = rela->r_addend;
174 rtype = ELF_R_TYPE(rela->r_info);
175 symidx = ELF_R_SYM(rela->r_info);
178 panic("unknown reloc type %d\n", type);
183 case R_X86_64_NONE: /* none */
186 case R_X86_64_64: /* S + A */
187 addr = lookup(lf, symidx, 1);
195 case R_X86_64_PC32: /* S + A - P */
196 addr = lookup(lf, symidx, 1);
197 where32 = (Elf32_Addr *)where;
198 val32 = (Elf32_Addr)(addr + addend - (Elf_Addr)where);
201 if (*where32 != val32)
205 case R_X86_64_32S: /* S + A sign extend */
206 addr = lookup(lf, symidx, 1);
207 val32 = (Elf32_Addr)(addr + addend);
208 where32 = (Elf32_Addr *)where;
211 if (*where32 != val32)
215 case R_X86_64_COPY: /* none */
217 * There shouldn't be copy relocations in kernel
220 printf("kldload: unexpected R_COPY relocation\n");
224 case R_X86_64_GLOB_DAT: /* S */
225 case R_X86_64_JMP_SLOT: /* XXX need addend + offset */
226 addr = lookup(lf, symidx, 1);
233 case R_X86_64_RELATIVE: /* B + A */
234 addr = relocbase + addend;
241 printf("kldload: unexpected relocation type %ld\n",
249 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
250 elf_lookup_fn lookup)
253 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
257 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
258 int type, elf_lookup_fn lookup)
261 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
265 elf_cpu_load_file(linker_file_t lf __unused)
272 elf_cpu_unload_file(linker_file_t lf __unused)