1033f58dfSPeter Wemm /*- 2033f58dfSPeter Wemm * Copyright 1996-1998 John D. Polstra. 3033f58dfSPeter Wemm * All rights reserved. 4033f58dfSPeter Wemm * 5033f58dfSPeter Wemm * Redistribution and use in source and binary forms, with or without 6033f58dfSPeter Wemm * modification, are permitted provided that the following conditions 7033f58dfSPeter Wemm * are met: 8033f58dfSPeter Wemm * 1. Redistributions of source code must retain the above copyright 9033f58dfSPeter Wemm * notice, this list of conditions and the following disclaimer. 10033f58dfSPeter Wemm * 2. Redistributions in binary form must reproduce the above copyright 11033f58dfSPeter Wemm * notice, this list of conditions and the following disclaimer in the 12033f58dfSPeter Wemm * documentation and/or other materials provided with the distribution. 13033f58dfSPeter Wemm * 14033f58dfSPeter Wemm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15033f58dfSPeter Wemm * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16033f58dfSPeter Wemm * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17033f58dfSPeter Wemm * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18033f58dfSPeter Wemm * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19033f58dfSPeter Wemm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20033f58dfSPeter Wemm * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21033f58dfSPeter Wemm * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22033f58dfSPeter Wemm * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23033f58dfSPeter Wemm * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24033f58dfSPeter Wemm */ 25033f58dfSPeter Wemm 2656ae44c5SDavid E. O'Brien #include <sys/cdefs.h> 2756ae44c5SDavid E. O'Brien __FBSDID("$FreeBSD$"); 2856ae44c5SDavid E. O'Brien 29033f58dfSPeter Wemm #include <sys/param.h> 303ebc1248SPeter Wemm #include <sys/kernel.h> 31033f58dfSPeter Wemm #include <sys/systm.h> 32f36ba452SJake Burkholder #include <sys/exec.h> 33f36ba452SJake Burkholder #include <sys/imgact.h> 34033f58dfSPeter Wemm #include <sys/linker.h> 353ebc1248SPeter Wemm #include <sys/sysent.h> 363ebc1248SPeter Wemm #include <sys/imgact_elf.h> 373ebc1248SPeter Wemm #include <sys/syscall.h> 3889ffc202SBjoern A. Zeeb #include <sys/sysent.h> 393ebc1248SPeter Wemm #include <sys/signalvar.h> 403ebc1248SPeter Wemm #include <sys/vnode.h> 41f36ba452SJake Burkholder 42f36ba452SJake Burkholder #include <vm/vm.h> 43f36ba452SJake Burkholder #include <vm/pmap.h> 44f36ba452SJake Burkholder #include <vm/vm_param.h> 45f36ba452SJake Burkholder 46033f58dfSPeter Wemm #include <machine/elf.h> 473ebc1248SPeter Wemm #include <machine/md_var.h> 483ebc1248SPeter Wemm 49afa88623SPeter Wemm struct sysentvec elf64_freebsd_sysvec = { 50a8d403e1SKonstantin Belousov .sv_size = SYS_MAXSYSCALL, 51a8d403e1SKonstantin Belousov .sv_table = sysent, 52a8d403e1SKonstantin Belousov .sv_mask = 0, 53a8d403e1SKonstantin Belousov .sv_sigsize = 0, 54a8d403e1SKonstantin Belousov .sv_sigtbl = NULL, 55a8d403e1SKonstantin Belousov .sv_errsize = 0, 56a8d403e1SKonstantin Belousov .sv_errtbl = NULL, 57a8d403e1SKonstantin Belousov .sv_transtrap = NULL, 58a8d403e1SKonstantin Belousov .sv_fixup = __elfN(freebsd_fixup), 59a8d403e1SKonstantin Belousov .sv_sendsig = sendsig, 60a8d403e1SKonstantin Belousov .sv_sigcode = sigcode, 61a8d403e1SKonstantin Belousov .sv_szsigcode = &szsigcode, 62a8d403e1SKonstantin Belousov .sv_prepsyscall = NULL, 63a8d403e1SKonstantin Belousov .sv_name = "FreeBSD ELF64", 64a8d403e1SKonstantin Belousov .sv_coredump = __elfN(coredump), 65a8d403e1SKonstantin Belousov .sv_imgact_try = NULL, 66a8d403e1SKonstantin Belousov .sv_minsigstksz = MINSIGSTKSZ, 67a8d403e1SKonstantin Belousov .sv_pagesize = PAGE_SIZE, 68a8d403e1SKonstantin Belousov .sv_minuser = VM_MIN_ADDRESS, 69a8d403e1SKonstantin Belousov .sv_maxuser = VM_MAXUSER_ADDRESS, 70a8d403e1SKonstantin Belousov .sv_usrstack = USRSTACK, 71a8d403e1SKonstantin Belousov .sv_psstrings = PS_STRINGS, 72a8d403e1SKonstantin Belousov .sv_stackprot = VM_PROT_ALL, 73a8d403e1SKonstantin Belousov .sv_copyout_strings = exec_copyout_strings, 74a8d403e1SKonstantin Belousov .sv_setregs = exec_setregs, 75a8d403e1SKonstantin Belousov .sv_fixlimit = NULL, 76b4cf0e62SKonstantin Belousov .sv_maxssiz = NULL, 77b4cf0e62SKonstantin Belousov .sv_flags = SV_ABI_FREEBSD | SV_LP64 783ebc1248SPeter Wemm }; 793ebc1248SPeter Wemm 80afa88623SPeter Wemm static Elf64_Brandinfo freebsd_brand_info = { 81a8d403e1SKonstantin Belousov .brand = ELFOSABI_FREEBSD, 82a8d403e1SKonstantin Belousov .machine = EM_X86_64, 83a8d403e1SKonstantin Belousov .compat_3_brand = "FreeBSD", 84a8d403e1SKonstantin Belousov .emul_path = NULL, 85a8d403e1SKonstantin Belousov .interp_path = "/libexec/ld-elf.so.1", 86a8d403e1SKonstantin Belousov .sysvec = &elf64_freebsd_sysvec, 87a8d403e1SKonstantin Belousov .interp_newpath = NULL, 8832c01de2SDmitry Chagin .brand_note = &elf64_freebsd_brandnote, 89cd899aadSDmitry Chagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 903ebc1248SPeter Wemm }; 913ebc1248SPeter Wemm 9252bf2041SBjoern A. Zeeb SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST, 93afa88623SPeter Wemm (sysinit_cfunc_t) elf64_insert_brand_entry, 943ebc1248SPeter Wemm &freebsd_brand_info); 95033f58dfSPeter Wemm 969b68618dSPeter Wemm static Elf64_Brandinfo freebsd_brand_oinfo = { 97a8d403e1SKonstantin Belousov .brand = ELFOSABI_FREEBSD, 98a8d403e1SKonstantin Belousov .machine = EM_X86_64, 99a8d403e1SKonstantin Belousov .compat_3_brand = "FreeBSD", 100a8d403e1SKonstantin Belousov .emul_path = NULL, 101a8d403e1SKonstantin Belousov .interp_path = "/usr/libexec/ld-elf.so.1", 102a8d403e1SKonstantin Belousov .sysvec = &elf64_freebsd_sysvec, 103a8d403e1SKonstantin Belousov .interp_newpath = NULL, 10432c01de2SDmitry Chagin .brand_note = &elf64_freebsd_brandnote, 105cd899aadSDmitry Chagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1069b68618dSPeter Wemm }; 1079b68618dSPeter Wemm 1089b68618dSPeter Wemm SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY, 1099b68618dSPeter Wemm (sysinit_cfunc_t) elf64_insert_brand_entry, 1109b68618dSPeter Wemm &freebsd_brand_oinfo); 1119b68618dSPeter Wemm 11289ffc202SBjoern A. Zeeb static Elf64_Brandinfo kfreebsd_brand_info = { 11389ffc202SBjoern A. Zeeb .brand = ELFOSABI_FREEBSD, 11489ffc202SBjoern A. Zeeb .machine = EM_X86_64, 11589ffc202SBjoern A. Zeeb .compat_3_brand = "FreeBSD", 11689ffc202SBjoern A. Zeeb .emul_path = NULL, 11789ffc202SBjoern A. Zeeb .interp_path = "/lib/ld-kfreebsd-x86-64.so.1", 11889ffc202SBjoern A. Zeeb .sysvec = &elf64_freebsd_sysvec, 11989ffc202SBjoern A. Zeeb .interp_newpath = NULL, 12089ffc202SBjoern A. Zeeb .brand_note = &elf64_kfreebsd_brandnote, 121ecc2fda8SBjoern A. Zeeb .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY 12289ffc202SBjoern A. Zeeb }; 12389ffc202SBjoern A. Zeeb 12489ffc202SBjoern A. Zeeb SYSINIT(kelf64, SI_SUB_EXEC, SI_ORDER_ANY, 12589ffc202SBjoern A. Zeeb (sysinit_cfunc_t) elf64_insert_brand_entry, 12689ffc202SBjoern A. Zeeb &kfreebsd_brand_info); 12789ffc202SBjoern A. Zeeb 1284da47b2fSMarcel Moolenaar 1294da47b2fSMarcel Moolenaar void 1304da47b2fSMarcel Moolenaar elf64_dump_thread(struct thread *td __unused, void *dst __unused, 1314da47b2fSMarcel Moolenaar size_t *off __unused) 1324da47b2fSMarcel Moolenaar { 1334da47b2fSMarcel Moolenaar } 1344da47b2fSMarcel Moolenaar 1354da47b2fSMarcel Moolenaar 136bde362f5SPeter Wemm /* Process one elf relocation with addend. */ 1377251b4bfSJake Burkholder static int 138e8855d4fSPeter Wemm elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data, 139e8855d4fSPeter Wemm int type, int local, elf_lookup_fn lookup) 140033f58dfSPeter Wemm { 141e8855d4fSPeter Wemm Elf64_Addr *where, val; 142e8855d4fSPeter Wemm Elf32_Addr *where32, val32; 143f1d19042SArchie Cobbs Elf_Addr addr; 144aa855a59SPeter Wemm Elf_Addr addend; 145757686b1SMarcel Moolenaar Elf_Size rtype, symidx; 146aa855a59SPeter Wemm const Elf_Rel *rel; 147aa855a59SPeter Wemm const Elf_Rela *rela; 148033f58dfSPeter Wemm 149aa855a59SPeter Wemm switch (type) { 150aa855a59SPeter Wemm case ELF_RELOC_REL: 1510a5e03ddSMatthew Dillon rel = (const Elf_Rel *)data; 152aa855a59SPeter Wemm where = (Elf_Addr *) (relocbase + rel->r_offset); 153aa855a59SPeter Wemm rtype = ELF_R_TYPE(rel->r_info); 154d297ad16SMarcel Moolenaar symidx = ELF_R_SYM(rel->r_info); 155910bb7dbSPeter Wemm /* Addend is 32 bit on 32 bit relocs */ 156910bb7dbSPeter Wemm switch (rtype) { 157910bb7dbSPeter Wemm case R_X86_64_PC32: 158910bb7dbSPeter Wemm case R_X86_64_32S: 159910bb7dbSPeter Wemm addend = *(Elf32_Addr *)where; 160910bb7dbSPeter Wemm break; 161910bb7dbSPeter Wemm default: 162910bb7dbSPeter Wemm addend = *where; 163910bb7dbSPeter Wemm break; 164910bb7dbSPeter Wemm } 165aa855a59SPeter Wemm break; 166aa855a59SPeter Wemm case ELF_RELOC_RELA: 1670a5e03ddSMatthew Dillon rela = (const Elf_Rela *)data; 168aa855a59SPeter Wemm where = (Elf_Addr *) (relocbase + rela->r_offset); 169aa855a59SPeter Wemm addend = rela->r_addend; 170aa855a59SPeter Wemm rtype = ELF_R_TYPE(rela->r_info); 171d297ad16SMarcel Moolenaar symidx = ELF_R_SYM(rela->r_info); 172aa855a59SPeter Wemm break; 173aa855a59SPeter Wemm default: 174aa855a59SPeter Wemm panic("unknown reloc type %d\n", type); 175aa855a59SPeter Wemm } 176033f58dfSPeter Wemm 177aa855a59SPeter Wemm switch (rtype) { 178aa855a59SPeter Wemm 179afa88623SPeter Wemm case R_X86_64_NONE: /* none */ 180033f58dfSPeter Wemm break; 181033f58dfSPeter Wemm 182afa88623SPeter Wemm case R_X86_64_64: /* S + A */ 183e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 184e8855d4fSPeter Wemm val = addr + addend; 185369dc8ceSEivind Eklund if (addr == 0) 186033f58dfSPeter Wemm return -1; 187e8855d4fSPeter Wemm if (*where != val) 188e8855d4fSPeter Wemm *where = val; 189033f58dfSPeter Wemm break; 190033f58dfSPeter Wemm 191afa88623SPeter Wemm case R_X86_64_PC32: /* S + A - P */ 192e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 193e8855d4fSPeter Wemm where32 = (Elf32_Addr *)where; 194e8855d4fSPeter Wemm val32 = (Elf32_Addr)(addr + addend - (Elf_Addr)where); 195369dc8ceSEivind Eklund if (addr == 0) 196033f58dfSPeter Wemm return -1; 197e8855d4fSPeter Wemm if (*where32 != val32) 198e8855d4fSPeter Wemm *where32 = val32; 199e8855d4fSPeter Wemm break; 200e8855d4fSPeter Wemm 201e8855d4fSPeter Wemm case R_X86_64_32S: /* S + A sign extend */ 202e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 203e8855d4fSPeter Wemm val32 = (Elf32_Addr)(addr + addend); 204e8855d4fSPeter Wemm where32 = (Elf32_Addr *)where; 205e8855d4fSPeter Wemm if (addr == 0) 206e8855d4fSPeter Wemm return -1; 207e8855d4fSPeter Wemm if (*where32 != val32) 208e8855d4fSPeter Wemm *where32 = val32; 209033f58dfSPeter Wemm break; 210033f58dfSPeter Wemm 211afa88623SPeter Wemm case R_X86_64_COPY: /* none */ 212033f58dfSPeter Wemm /* 213033f58dfSPeter Wemm * There shouldn't be copy relocations in kernel 214033f58dfSPeter Wemm * objects. 215033f58dfSPeter Wemm */ 216033f58dfSPeter Wemm printf("kldload: unexpected R_COPY relocation\n"); 217033f58dfSPeter Wemm return -1; 218033f58dfSPeter Wemm break; 219033f58dfSPeter Wemm 220afa88623SPeter Wemm case R_X86_64_GLOB_DAT: /* S */ 221901b68c1SPeter Wemm case R_X86_64_JMP_SLOT: /* XXX need addend + offset */ 222e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 223369dc8ceSEivind Eklund if (addr == 0) 224033f58dfSPeter Wemm return -1; 225033f58dfSPeter Wemm if (*where != addr) 226033f58dfSPeter Wemm *where = addr; 227033f58dfSPeter Wemm break; 228033f58dfSPeter Wemm 229afa88623SPeter Wemm case R_X86_64_RELATIVE: /* B + A */ 230e8855d4fSPeter Wemm addr = relocbase + addend; 231e8855d4fSPeter Wemm val = addr; 232e8855d4fSPeter Wemm if (*where != val) 233e8855d4fSPeter Wemm *where = val; 234033f58dfSPeter Wemm break; 235033f58dfSPeter Wemm 236033f58dfSPeter Wemm default: 2375a337b25SPeter Wemm printf("kldload: unexpected relocation type %ld\n", 238aa855a59SPeter Wemm rtype); 239033f58dfSPeter Wemm return -1; 240033f58dfSPeter Wemm } 241033f58dfSPeter Wemm return(0); 242033f58dfSPeter Wemm } 2431aeb23cdSMarcel Moolenaar 2441aeb23cdSMarcel Moolenaar int 245e8855d4fSPeter Wemm elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type, 246e8855d4fSPeter Wemm elf_lookup_fn lookup) 2477251b4bfSJake Burkholder { 2487251b4bfSJake Burkholder 249e8855d4fSPeter Wemm return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup)); 2507251b4bfSJake Burkholder } 2517251b4bfSJake Burkholder 2527251b4bfSJake Burkholder int 253e8855d4fSPeter Wemm elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data, 254e8855d4fSPeter Wemm int type, elf_lookup_fn lookup) 2557251b4bfSJake Burkholder { 2567251b4bfSJake Burkholder 257e8855d4fSPeter Wemm return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup)); 2587251b4bfSJake Burkholder } 2597251b4bfSJake Burkholder 2607251b4bfSJake Burkholder int 2611aeb23cdSMarcel Moolenaar elf_cpu_load_file(linker_file_t lf __unused) 2621aeb23cdSMarcel Moolenaar { 2631aeb23cdSMarcel Moolenaar 2641aeb23cdSMarcel Moolenaar return (0); 2651aeb23cdSMarcel Moolenaar } 2661aeb23cdSMarcel Moolenaar 2671aeb23cdSMarcel Moolenaar int 2681aeb23cdSMarcel Moolenaar elf_cpu_unload_file(linker_file_t lf __unused) 2691aeb23cdSMarcel Moolenaar { 2701aeb23cdSMarcel Moolenaar 2711aeb23cdSMarcel Moolenaar return (0); 2721aeb23cdSMarcel Moolenaar } 273