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/altivec.h>
48 #include <machine/cpu.h>
49 #include <machine/elf.h>
50 #include <machine/md_var.h>
52 struct sysentvec elf64_freebsd_sysvec = {
53 .sv_size = SYS_MAXSYSCALL,
61 .sv_fixup = __elfN(freebsd_fixup),
62 .sv_sendsig = sendsig,
63 .sv_sigcode = sigcode64,
64 .sv_szsigcode = &szsigcode64,
65 .sv_prepsyscall = NULL,
66 .sv_name = "FreeBSD ELF64",
67 .sv_coredump = __elfN(coredump),
68 .sv_imgact_try = NULL,
69 .sv_minsigstksz = MINSIGSTKSZ,
70 .sv_pagesize = PAGE_SIZE,
71 .sv_minuser = VM_MIN_ADDRESS,
72 .sv_maxuser = VM_MAXUSER_ADDRESS,
73 .sv_usrstack = USRSTACK,
74 .sv_psstrings = PS_STRINGS,
75 .sv_stackprot = VM_PROT_ALL,
76 .sv_copyout_strings = exec_copyout_strings,
77 .sv_setregs = exec_setregs,
80 .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP,
81 .sv_set_syscall_retval = cpu_set_syscall_retval,
82 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
83 .sv_syscallnames = syscallnames,
84 .sv_shared_page_base = SHAREDPAGE,
85 .sv_shared_page_len = PAGE_SIZE,
87 .sv_thread_detach = NULL,
89 INIT_SYSENTVEC(elf64_sysvec, &elf64_freebsd_sysvec);
91 static Elf64_Brandinfo freebsd_brand_info = {
92 .brand = ELFOSABI_FREEBSD,
94 .compat_3_brand = "FreeBSD",
96 .interp_path = "/libexec/ld-elf.so.1",
97 .sysvec = &elf64_freebsd_sysvec,
98 .interp_newpath = NULL,
99 .brand_note = &elf64_freebsd_brandnote,
100 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
103 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_ANY,
104 (sysinit_cfunc_t) elf64_insert_brand_entry,
105 &freebsd_brand_info);
107 static Elf64_Brandinfo freebsd_brand_oinfo = {
108 .brand = ELFOSABI_FREEBSD,
110 .compat_3_brand = "FreeBSD",
112 .interp_path = "/usr/libexec/ld-elf.so.1",
113 .sysvec = &elf64_freebsd_sysvec,
114 .interp_newpath = NULL,
115 .brand_note = &elf64_freebsd_brandnote,
116 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
119 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
120 (sysinit_cfunc_t) elf64_insert_brand_entry,
121 &freebsd_brand_oinfo);
123 void elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase);
126 elf64_dump_thread(struct thread *td, void *dst, size_t *off)
133 if (pcb->pcb_flags & PCB_VEC) {
136 len += elf64_populate_note(NT_PPC_VMX,
138 sizeof(pcb->pcb_vec), NULL);
140 len += elf64_populate_note(NT_PPC_VMX, NULL, NULL,
141 sizeof(pcb->pcb_vec), NULL);
147 /* Process one elf relocation with addend. */
149 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
150 int type, int local, elf_lookup_fn lookup)
155 Elf_Word rtype, symidx;
156 const Elf_Rela *rela;
160 panic("PPC only supports RELA relocations");
163 rela = (const Elf_Rela *)data;
164 where = (Elf_Addr *) (relocbase + rela->r_offset);
165 addend = rela->r_addend;
166 rtype = ELF_R_TYPE(rela->r_info);
167 symidx = ELF_R_SYM(rela->r_info);
170 panic("elf_reloc: unknown relocation mode %d\n", type);
178 case R_PPC64_ADDR64: /* doubleword64 S + A */
179 addr = lookup(lf, symidx, 1);
186 case R_PPC_RELATIVE: /* doubleword64 B + A */
187 *where = elf_relocaddr(lf, relocbase + addend);
190 case R_PPC_JMP_SLOT: /* function descriptor copy */
191 addr = lookup(lf, symidx, 1);
192 memcpy(where, (Elf_Addr *)addr, 3*sizeof(Elf_Addr));
193 __asm __volatile("dcbst 0,%0; sync" :: "r"(where) : "memory");
197 printf("kldload: unexpected relocation type %d\n",
205 elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase)
207 Elf_Rela *rela = 0, *relalim;
212 * Extract the rela/relasz values from the dynamic section
214 for (; dynp->d_tag != DT_NULL; dynp++) {
215 switch (dynp->d_tag) {
217 rela = (Elf_Rela *)(relocbase+dynp->d_un.d_ptr);
220 relasz = dynp->d_un.d_val;
226 * Relocate these values
228 relalim = (Elf_Rela *)((caddr_t)rela + relasz);
229 for (; rela < relalim; rela++) {
230 if (ELF_R_TYPE(rela->r_info) != R_PPC_RELATIVE)
232 where = (Elf_Addr *)(relocbase + rela->r_offset);
233 *where = (Elf_Addr)(relocbase + rela->r_addend);
238 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
239 elf_lookup_fn lookup)
242 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
246 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
247 int type, elf_lookup_fn lookup)
250 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
254 elf_cpu_load_file(linker_file_t lf)
256 /* Only sync the cache for non-kernel modules */
258 __syncicache(lf->address, lf->size);
263 elf_cpu_unload_file(linker_file_t lf __unused)