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,
85 static Elf64_Brandinfo freebsd_brand_info = {
86 .brand = ELFOSABI_FREEBSD,
88 .compat_3_brand = "FreeBSD",
90 .interp_path = "/libexec/ld-elf.so.1",
91 .sysvec = &elf64_freebsd_sysvec,
92 .interp_newpath = NULL,
93 .brand_note = &elf64_freebsd_brandnote,
94 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
97 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
98 (sysinit_cfunc_t) elf64_insert_brand_entry,
101 static Elf64_Brandinfo freebsd_brand_oinfo = {
102 .brand = ELFOSABI_FREEBSD,
103 .machine = EM_X86_64,
104 .compat_3_brand = "FreeBSD",
106 .interp_path = "/usr/libexec/ld-elf.so.1",
107 .sysvec = &elf64_freebsd_sysvec,
108 .interp_newpath = NULL,
109 .brand_note = &elf64_freebsd_brandnote,
110 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
113 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
114 (sysinit_cfunc_t) elf64_insert_brand_entry,
115 &freebsd_brand_oinfo);
117 static Elf64_Brandinfo kfreebsd_brand_info = {
118 .brand = ELFOSABI_FREEBSD,
119 .machine = EM_X86_64,
120 .compat_3_brand = "FreeBSD",
122 .interp_path = "/lib/ld-kfreebsd-x86-64.so.1",
123 .sysvec = &elf64_freebsd_sysvec,
124 .interp_newpath = NULL,
125 .brand_note = &elf64_kfreebsd_brandnote,
126 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY
129 SYSINIT(kelf64, SI_SUB_EXEC, SI_ORDER_ANY,
130 (sysinit_cfunc_t) elf64_insert_brand_entry,
131 &kfreebsd_brand_info);
135 elf64_dump_thread(struct thread *td __unused, void *dst __unused,
136 size_t *off __unused)
141 /* Process one elf relocation with addend. */
143 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
144 int type, int local, elf_lookup_fn lookup)
146 Elf64_Addr *where, val;
147 Elf32_Addr *where32, val32;
150 Elf_Size rtype, symidx;
152 const Elf_Rela *rela;
156 rel = (const Elf_Rel *)data;
157 where = (Elf_Addr *) (relocbase + rel->r_offset);
158 rtype = ELF_R_TYPE(rel->r_info);
159 symidx = ELF_R_SYM(rel->r_info);
160 /* 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 case R_X86_64_PLT32: /* L + A - P, L is PLT location for
199 the symbol, which we treat as S */
200 addr = lookup(lf, symidx, 1);
201 where32 = (Elf32_Addr *)where;
202 val32 = (Elf32_Addr)(addr + addend - (Elf_Addr)where);
205 if (*where32 != val32)
209 case R_X86_64_32S: /* S + A sign extend */
210 addr = lookup(lf, symidx, 1);
211 val32 = (Elf32_Addr)(addr + addend);
212 where32 = (Elf32_Addr *)where;
215 if (*where32 != val32)
219 case R_X86_64_COPY: /* none */
221 * There shouldn't be copy relocations in kernel
224 printf("kldload: unexpected R_COPY relocation\n");
228 case R_X86_64_GLOB_DAT: /* S */
229 case R_X86_64_JMP_SLOT: /* XXX need addend + offset */
230 addr = lookup(lf, symidx, 1);
237 case R_X86_64_RELATIVE: /* B + A */
238 addr = relocbase + addend;
245 printf("kldload: unexpected relocation type %ld\n",
253 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
254 elf_lookup_fn lookup)
257 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
261 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
262 int type, elf_lookup_fn lookup)
265 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
269 elf_cpu_load_file(linker_file_t lf __unused)
276 elf_cpu_unload_file(linker_file_t lf __unused)