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.
28 #include <sys/param.h>
29 #include <sys/kernel.h>
30 #include <sys/systm.h>
32 #include <sys/imgact.h>
33 #include <sys/malloc.h>
35 #include <sys/namei.h>
36 #include <sys/fcntl.h>
37 #include <sys/sysent.h>
38 #include <sys/imgact_elf.h>
39 #include <sys/syscall.h>
40 #include <sys/signalvar.h>
41 #include <sys/vnode.h>
42 #include <sys/linker.h>
45 #include <vm/vm_param.h>
47 #include <machine/cpu.h>
48 #include <machine/elf.h>
49 #include <machine/md_var.h>
51 struct sysentvec elf32_freebsd_sysvec = {
52 .sv_size = SYS_MAXSYSCALL,
60 .sv_fixup = __elfN(freebsd_fixup),
61 .sv_sendsig = sendsig,
62 .sv_sigcode = sigcode,
63 .sv_szsigcode = &szsigcode,
64 .sv_prepsyscall = NULL,
65 .sv_name = "FreeBSD ELF32",
66 .sv_coredump = __elfN(coredump),
67 .sv_imgact_try = NULL,
68 .sv_minsigstksz = MINSIGSTKSZ,
69 .sv_pagesize = PAGE_SIZE,
70 .sv_minuser = VM_MIN_ADDRESS,
71 .sv_maxuser = VM_MAXUSER_ADDRESS,
72 .sv_usrstack = USRSTACK,
73 .sv_psstrings = PS_STRINGS,
74 .sv_stackprot = VM_PROT_ALL,
75 .sv_copyout_strings = exec_copyout_strings,
76 .sv_setregs = exec_setregs,
81 static Elf32_Brandinfo freebsd_brand_info = {
82 .brand = ELFOSABI_FREEBSD,
84 .compat_3_brand = "FreeBSD",
86 .interp_path = "/libexec/ld-elf.so.1",
87 .sysvec = &elf32_freebsd_sysvec,
88 .interp_newpath = NULL,
89 .brand_note = &elf32_freebsd_brandnote,
90 .flags = BI_CAN_EXEC_DYN
93 SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_ANY,
94 (sysinit_cfunc_t) elf32_insert_brand_entry,
97 static Elf32_Brandinfo freebsd_brand_oinfo = {
98 .brand = ELFOSABI_FREEBSD,
100 .compat_3_brand = "FreeBSD",
102 .interp_path = "/usr/libexec/ld-elf.so.1",
103 .sysvec = &elf32_freebsd_sysvec,
104 .interp_newpath = NULL,
105 .brand_note = &elf32_freebsd_brandnote,
106 .flags = BI_CAN_EXEC_DYN
109 SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY,
110 (sysinit_cfunc_t) elf32_insert_brand_entry,
111 &freebsd_brand_oinfo);
115 elf32_dump_thread(struct thread *td __unused, void *dst __unused,
116 size_t *off __unused)
121 /* Process one elf relocation with addend. */
123 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
124 int type, int local, elf_lookup_fn lookup)
130 Elf_Word rtype, symidx;
131 const Elf_Rela *rela;
135 panic("PPC only supports RELA relocations");
138 rela = (const Elf_Rela *)data;
139 where = (Elf_Addr *) (relocbase + rela->r_offset);
140 hwhere = (Elf_Half *) (relocbase + rela->r_offset);
141 addend = rela->r_addend;
142 rtype = ELF_R_TYPE(rela->r_info);
143 symidx = ELF_R_SYM(rela->r_info);
146 panic("elf_reloc: unknown relocation mode %d\n", type);
154 case R_PPC_ADDR32: /* word32 S + A */
155 addr = lookup(lf, symidx, 1);
162 case R_PPC_ADDR16_LO: /* #lo(S) */
163 addr = lookup(lf, symidx, 1);
167 * addend values are sometimes relative to sections
168 * (i.e. .rodata) in rela, where in reality they
169 * are relative to relocbase. Detect this condition.
171 if (addr > relocbase && addr <= (relocbase + addend))
172 addr = relocbase + addend;
175 *hwhere = addr & 0xffff;
178 case R_PPC_ADDR16_HA: /* #ha(S) */
179 addr = lookup(lf, symidx, 1);
183 * addend values are sometimes relative to sections
184 * (i.e. .rodata) in rela, where in reality they
185 * are relative to relocbase. Detect this condition.
187 if (addr > relocbase && addr <= (relocbase + addend))
188 addr = relocbase + addend;
191 *hwhere = ((addr >> 16) + ((addr & 0x8000) ? 1 : 0))
195 case R_PPC_RELATIVE: /* word32 B + A */
196 *where = relocbase + addend;
200 printf("kldload: unexpected relocation type %d\n",
208 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
209 elf_lookup_fn lookup)
212 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
216 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
217 int type, elf_lookup_fn lookup)
220 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
224 elf_cpu_load_file(linker_file_t lf)
226 /* Only sync the cache for non-kernel modules */
228 __syncicache(lf->address, lf->size);
233 elf_cpu_unload_file(linker_file_t lf __unused)