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("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/kernel.h>
33 #include <sys/systm.h>
35 #include <sys/imgact.h>
36 #include <sys/linker.h>
38 #include <sys/sysent.h>
39 #include <sys/imgact_elf.h>
40 #include <sys/syscall.h>
41 #include <sys/signalvar.h>
42 #include <sys/vnode.h>
46 #include <vm/vm_param.h>
48 #include <machine/elf.h>
49 #include <machine/md_var.h>
50 #include <machine/npx.h>
52 #if !defined(CPU_DISABLE_SSE) && defined(I686_CPU)
53 #define CPU_ENABLE_SSE
56 struct sysentvec elf32_freebsd_sysvec = {
57 .sv_size = SYS_MAXSYSCALL,
65 .sv_fixup = __elfN(freebsd_fixup),
66 .sv_sendsig = sendsig,
67 .sv_sigcode = sigcode,
68 .sv_szsigcode = &szsigcode,
69 .sv_prepsyscall = NULL,
70 .sv_name = "FreeBSD ELF32",
71 .sv_coredump = __elfN(coredump),
72 .sv_imgact_try = NULL,
73 .sv_minsigstksz = MINSIGSTKSZ,
74 .sv_pagesize = PAGE_SIZE,
75 .sv_minuser = VM_MIN_ADDRESS,
76 .sv_maxuser = VM_MAXUSER_ADDRESS,
77 .sv_usrstack = USRSTACK,
78 .sv_psstrings = PS_STRINGS,
79 .sv_stackprot = VM_PROT_ALL,
80 .sv_copyout_strings = exec_copyout_strings,
81 .sv_setregs = exec_setregs,
84 .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32 | SV_SHP,
85 .sv_set_syscall_retval = cpu_set_syscall_retval,
86 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
87 .sv_syscallnames = syscallnames,
88 .sv_shared_page_base = SHAREDPAGE,
89 .sv_shared_page_len = PAGE_SIZE,
91 .sv_thread_detach = NULL,
93 INIT_SYSENTVEC(elf32_sysvec, &elf32_freebsd_sysvec);
95 static Elf32_Brandinfo freebsd_brand_info = {
96 .brand = ELFOSABI_FREEBSD,
98 .compat_3_brand = "FreeBSD",
100 .interp_path = "/libexec/ld-elf.so.1",
101 .sysvec = &elf32_freebsd_sysvec,
102 .interp_newpath = NULL,
103 .brand_note = &elf32_freebsd_brandnote,
104 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
107 SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST,
108 (sysinit_cfunc_t) elf32_insert_brand_entry,
109 &freebsd_brand_info);
111 static Elf32_Brandinfo freebsd_brand_oinfo = {
112 .brand = ELFOSABI_FREEBSD,
114 .compat_3_brand = "FreeBSD",
116 .interp_path = "/usr/libexec/ld-elf.so.1",
117 .sysvec = &elf32_freebsd_sysvec,
118 .interp_newpath = NULL,
119 .brand_note = &elf32_freebsd_brandnote,
120 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
123 SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY,
124 (sysinit_cfunc_t) elf32_insert_brand_entry,
125 &freebsd_brand_oinfo);
127 static Elf32_Brandinfo kfreebsd_brand_info = {
128 .brand = ELFOSABI_FREEBSD,
130 .compat_3_brand = "FreeBSD",
132 .interp_path = "/lib/ld.so.1",
133 .sysvec = &elf32_freebsd_sysvec,
134 .interp_newpath = NULL,
135 .brand_note = &elf32_kfreebsd_brandnote,
136 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY
139 SYSINIT(kelf32, SI_SUB_EXEC, SI_ORDER_ANY,
140 (sysinit_cfunc_t) elf32_insert_brand_entry,
141 &kfreebsd_brand_info);
145 elf32_dump_thread(struct thread *td, void *dst, size_t *off)
147 #ifdef CPU_ENABLE_SSE
153 #ifdef CPU_ENABLE_SSE
157 len += elf32_populate_note(NT_X86_XSTATE,
158 get_pcb_user_save_td(td), dst,
159 cpu_max_ext_state_size, &buf);
160 *(uint64_t *)((char *)buf + X86_XSTATE_XCR0_OFFSET) =
163 len += elf32_populate_note(NT_X86_XSTATE, NULL, NULL,
164 cpu_max_ext_state_size, NULL);
170 /* Process one elf relocation with addend. */
172 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
173 int type, int local, elf_lookup_fn lookup)
178 Elf_Word rtype, symidx;
180 const Elf_Rela *rela;
185 rel = (const Elf_Rel *)data;
186 where = (Elf_Addr *) (relocbase + rel->r_offset);
188 rtype = ELF_R_TYPE(rel->r_info);
189 symidx = ELF_R_SYM(rel->r_info);
192 rela = (const Elf_Rela *)data;
193 where = (Elf_Addr *) (relocbase + rela->r_offset);
194 addend = rela->r_addend;
195 rtype = ELF_R_TYPE(rela->r_info);
196 symidx = ELF_R_SYM(rela->r_info);
199 panic("unknown reloc type %d\n", type);
203 if (rtype == R_386_RELATIVE) { /* A + B */
204 addr = elf_relocaddr(lf, relocbase + addend);
213 case R_386_NONE: /* none */
216 case R_386_32: /* S + A */
217 error = lookup(lf, symidx, 1, &addr);
225 case R_386_PC32: /* S + A - P */
226 error = lookup(lf, symidx, 1, &addr);
229 addr += addend - (Elf_Addr)where;
234 case R_386_COPY: /* none */
236 * There shouldn't be copy relocations in kernel
239 printf("kldload: unexpected R_COPY relocation\n");
243 case R_386_GLOB_DAT: /* S */
244 error = lookup(lf, symidx, 1, &addr);
255 printf("kldload: unexpected relocation type %d\n",
263 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
264 elf_lookup_fn lookup)
267 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
271 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
272 int type, elf_lookup_fn lookup)
275 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
279 elf_cpu_load_file(linker_file_t lf __unused)
286 elf_cpu_unload_file(linker_file_t lf __unused)