1 /*- 2 * Copyright 1996-1998 John D. Polstra. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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. 24 * 25 * $FreeBSD$ 26 */ 27 28 #include <sys/param.h> 29 #include <sys/kernel.h> 30 #include <sys/systm.h> 31 #include <sys/exec.h> 32 #include <sys/imgact.h> 33 #include <sys/malloc.h> 34 #include <sys/proc.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> 43 44 #include <vm/vm.h> 45 #include <vm/vm_param.h> 46 47 #include <machine/cpu.h> 48 #include <machine/elf.h> 49 #include <machine/md_var.h> 50 51 struct sysentvec elf64_freebsd_sysvec = { 52 .sv_size = SYS_MAXSYSCALL, 53 .sv_table = sysent, 54 .sv_mask = 0, 55 .sv_sigsize = 0, 56 .sv_sigtbl = NULL, 57 .sv_errsize = 0, 58 .sv_errtbl = NULL, 59 .sv_transtrap = NULL, 60 .sv_fixup = __elfN(freebsd_fixup), 61 .sv_sendsig = sendsig, 62 .sv_sigcode = sigcode64, 63 .sv_szsigcode = &szsigcode64, 64 .sv_prepsyscall = NULL, 65 .sv_name = "FreeBSD ELF64", 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, 77 .sv_fixlimit = NULL, 78 .sv_maxssiz = NULL, 79 .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP, 80 .sv_set_syscall_retval = cpu_set_syscall_retval, 81 .sv_fetch_syscall_args = cpu_fetch_syscall_args, 82 .sv_syscallnames = syscallnames, 83 .sv_shared_page_base = SHAREDPAGE, 84 .sv_shared_page_len = PAGE_SIZE, 85 .sv_schedtail = NULL, 86 }; 87 INIT_SYSENTVEC(elf64_sysvec, &elf64_freebsd_sysvec); 88 89 static Elf64_Brandinfo freebsd_brand_info = { 90 .brand = ELFOSABI_FREEBSD, 91 .machine = EM_PPC64, 92 .compat_3_brand = "FreeBSD", 93 .emul_path = NULL, 94 .interp_path = "/libexec/ld-elf.so.1", 95 .sysvec = &elf64_freebsd_sysvec, 96 .interp_newpath = NULL, 97 .brand_note = &elf64_freebsd_brandnote, 98 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 99 }; 100 101 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_ANY, 102 (sysinit_cfunc_t) elf64_insert_brand_entry, 103 &freebsd_brand_info); 104 105 static Elf64_Brandinfo freebsd_brand_oinfo = { 106 .brand = ELFOSABI_FREEBSD, 107 .machine = EM_PPC64, 108 .compat_3_brand = "FreeBSD", 109 .emul_path = NULL, 110 .interp_path = "/usr/libexec/ld-elf.so.1", 111 .sysvec = &elf64_freebsd_sysvec, 112 .interp_newpath = NULL, 113 .brand_note = &elf64_freebsd_brandnote, 114 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 115 }; 116 117 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY, 118 (sysinit_cfunc_t) elf64_insert_brand_entry, 119 &freebsd_brand_oinfo); 120 121 void 122 elf64_dump_thread(struct thread *td __unused, void *dst __unused, 123 size_t *off __unused) 124 { 125 } 126 127 128 /* Process one elf relocation with addend. */ 129 static int 130 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data, 131 int type, int local, elf_lookup_fn lookup) 132 { 133 Elf_Addr *where; 134 Elf_Addr addr; 135 Elf_Addr addend; 136 Elf_Word rtype, symidx; 137 const Elf_Rela *rela; 138 139 switch (type) { 140 case ELF_RELOC_REL: 141 panic("PPC only supports RELA relocations"); 142 break; 143 case ELF_RELOC_RELA: 144 rela = (const Elf_Rela *)data; 145 where = (Elf_Addr *) (relocbase + rela->r_offset); 146 addend = rela->r_addend; 147 rtype = ELF_R_TYPE(rela->r_info); 148 symidx = ELF_R_SYM(rela->r_info); 149 break; 150 default: 151 panic("elf_reloc: unknown relocation mode %d\n", type); 152 } 153 154 switch (rtype) { 155 156 case R_PPC_NONE: 157 break; 158 159 case R_PPC64_ADDR64: /* doubleword64 S + A */ 160 addr = lookup(lf, symidx, 1); 161 if (addr == 0) 162 return -1; 163 addr += addend; 164 *where = addr; 165 break; 166 167 case R_PPC_RELATIVE: /* doubleword64 B + A */ 168 *where = elf_relocaddr(lf, relocbase + addend); 169 break; 170 171 case R_PPC_JMP_SLOT: /* function descriptor copy */ 172 addr = lookup(lf, symidx, 1); 173 memcpy(where, (Elf_Addr *)addr, 3*sizeof(Elf_Addr)); 174 __asm __volatile("dcbst 0,%0; sync" :: "r"(where) : "memory"); 175 break; 176 177 default: 178 printf("kldload: unexpected relocation type %d\n", 179 (int) rtype); 180 return -1; 181 } 182 return(0); 183 } 184 185 int 186 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type, 187 elf_lookup_fn lookup) 188 { 189 190 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup)); 191 } 192 193 int 194 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data, 195 int type, elf_lookup_fn lookup) 196 { 197 198 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup)); 199 } 200 201 int 202 elf_cpu_load_file(linker_file_t lf) 203 { 204 /* Only sync the cache for non-kernel modules */ 205 if (lf->id != 1) 206 __syncicache(lf->address, lf->size); 207 return (0); 208 } 209 210 int 211 elf_cpu_unload_file(linker_file_t lf __unused) 212 { 213 214 return (0); 215 } 216