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,
92 INIT_SYSENTVEC(elf32_sysvec, &elf32_freebsd_sysvec);
94 static Elf32_Brandinfo freebsd_brand_info = {
95 .brand = ELFOSABI_FREEBSD,
97 .compat_3_brand = "FreeBSD",
99 .interp_path = "/libexec/ld-elf.so.1",
100 .sysvec = &elf32_freebsd_sysvec,
101 .interp_newpath = NULL,
102 .brand_note = &elf32_freebsd_brandnote,
103 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
106 SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST,
107 (sysinit_cfunc_t) elf32_insert_brand_entry,
108 &freebsd_brand_info);
110 static Elf32_Brandinfo freebsd_brand_oinfo = {
111 .brand = ELFOSABI_FREEBSD,
113 .compat_3_brand = "FreeBSD",
115 .interp_path = "/usr/libexec/ld-elf.so.1",
116 .sysvec = &elf32_freebsd_sysvec,
117 .interp_newpath = NULL,
118 .brand_note = &elf32_freebsd_brandnote,
119 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
122 SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY,
123 (sysinit_cfunc_t) elf32_insert_brand_entry,
124 &freebsd_brand_oinfo);
126 static Elf32_Brandinfo kfreebsd_brand_info = {
127 .brand = ELFOSABI_FREEBSD,
129 .compat_3_brand = "FreeBSD",
131 .interp_path = "/lib/ld.so.1",
132 .sysvec = &elf32_freebsd_sysvec,
133 .interp_newpath = NULL,
134 .brand_note = &elf32_kfreebsd_brandnote,
135 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY
138 SYSINIT(kelf32, SI_SUB_EXEC, SI_ORDER_ANY,
139 (sysinit_cfunc_t) elf32_insert_brand_entry,
140 &kfreebsd_brand_info);
144 elf32_dump_thread(struct thread *td, void *dst, size_t *off)
146 #ifdef CPU_ENABLE_SSE
152 #ifdef CPU_ENABLE_SSE
156 len += elf32_populate_note(NT_X86_XSTATE,
157 get_pcb_user_save_td(td), dst,
158 cpu_max_ext_state_size, &buf);
159 *(uint64_t *)((char *)buf + X86_XSTATE_XCR0_OFFSET) =
162 len += elf32_populate_note(NT_X86_XSTATE, NULL, NULL,
163 cpu_max_ext_state_size, NULL);
169 /* Process one elf relocation with addend. */
171 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
172 int type, int local, elf_lookup_fn lookup)
177 Elf_Word rtype, symidx;
179 const Elf_Rela *rela;
183 rel = (const Elf_Rel *)data;
184 where = (Elf_Addr *) (relocbase + rel->r_offset);
186 rtype = ELF_R_TYPE(rel->r_info);
187 symidx = ELF_R_SYM(rel->r_info);
190 rela = (const Elf_Rela *)data;
191 where = (Elf_Addr *) (relocbase + rela->r_offset);
192 addend = rela->r_addend;
193 rtype = ELF_R_TYPE(rela->r_info);
194 symidx = ELF_R_SYM(rela->r_info);
197 panic("unknown reloc type %d\n", type);
201 if (rtype == R_386_RELATIVE) { /* A + B */
202 addr = elf_relocaddr(lf, relocbase + addend);
211 case R_386_NONE: /* none */
214 case R_386_32: /* S + A */
215 addr = lookup(lf, symidx, 1);
223 case R_386_PC32: /* S + A - P */
224 addr = lookup(lf, symidx, 1);
227 addr += addend - (Elf_Addr)where;
232 case R_386_COPY: /* none */
234 * There shouldn't be copy relocations in kernel
237 printf("kldload: unexpected R_COPY relocation\n");
241 case R_386_GLOB_DAT: /* S */
242 addr = lookup(lf, symidx, 1);
253 printf("kldload: unexpected relocation type %d\n",
261 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
262 elf_lookup_fn lookup)
265 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
269 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
270 int type, elf_lookup_fn lookup)
273 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
277 elf_cpu_load_file(linker_file_t lf __unused)
284 elf_cpu_unload_file(linker_file_t lf __unused)