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 269676a785SDavid E. O'Brien #include <sys/cdefs.h> 279676a785SDavid E. O'Brien __FBSDID("$FreeBSD$"); 289676a785SDavid 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> 35afe1a688SKonstantin Belousov #include <sys/proc.h> 363ebc1248SPeter Wemm #include <sys/sysent.h> 373ebc1248SPeter Wemm #include <sys/imgact_elf.h> 383ebc1248SPeter Wemm #include <sys/syscall.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 493ebc1248SPeter Wemm struct sysentvec elf32_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 ELF32", 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, 77d69ae412SKonstantin Belousov .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32 | SV_SHP, 78afe1a688SKonstantin Belousov .sv_set_syscall_retval = cpu_set_syscall_retval, 79afe1a688SKonstantin Belousov .sv_fetch_syscall_args = cpu_fetch_syscall_args, 80afe1a688SKonstantin Belousov .sv_syscallnames = syscallnames, 81d69ae412SKonstantin Belousov .sv_shared_page_base = SHAREDPAGE, 82d69ae412SKonstantin Belousov .sv_shared_page_len = PAGE_SIZE, 83e5d81ef1SDmitry Chagin .sv_schedtail = NULL, 843ebc1248SPeter Wemm }; 85d69ae412SKonstantin Belousov INIT_SYSENTVEC(elf32_sysvec, &elf32_freebsd_sysvec); 863ebc1248SPeter Wemm 873ebc1248SPeter Wemm static Elf32_Brandinfo freebsd_brand_info = { 88a8d403e1SKonstantin Belousov .brand = ELFOSABI_FREEBSD, 89a8d403e1SKonstantin Belousov .machine = EM_386, 90a8d403e1SKonstantin Belousov .compat_3_brand = "FreeBSD", 91a8d403e1SKonstantin Belousov .emul_path = NULL, 92a8d403e1SKonstantin Belousov .interp_path = "/libexec/ld-elf.so.1", 93a8d403e1SKonstantin Belousov .sysvec = &elf32_freebsd_sysvec, 94a8d403e1SKonstantin Belousov .interp_newpath = NULL, 9532c01de2SDmitry Chagin .brand_note = &elf32_freebsd_brandnote, 96cd899aadSDmitry Chagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 973ebc1248SPeter Wemm }; 983ebc1248SPeter Wemm 9952bf2041SBjoern A. Zeeb SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST, 1003ebc1248SPeter Wemm (sysinit_cfunc_t) elf32_insert_brand_entry, 1013ebc1248SPeter Wemm &freebsd_brand_info); 102033f58dfSPeter Wemm 1039b68618dSPeter Wemm static Elf32_Brandinfo freebsd_brand_oinfo = { 104a8d403e1SKonstantin Belousov .brand = ELFOSABI_FREEBSD, 105a8d403e1SKonstantin Belousov .machine = EM_386, 106a8d403e1SKonstantin Belousov .compat_3_brand = "FreeBSD", 107a8d403e1SKonstantin Belousov .emul_path = NULL, 108a8d403e1SKonstantin Belousov .interp_path = "/usr/libexec/ld-elf.so.1", 109a8d403e1SKonstantin Belousov .sysvec = &elf32_freebsd_sysvec, 110a8d403e1SKonstantin Belousov .interp_newpath = NULL, 11132c01de2SDmitry Chagin .brand_note = &elf32_freebsd_brandnote, 112cd899aadSDmitry Chagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1139b68618dSPeter Wemm }; 1149b68618dSPeter Wemm 1159b68618dSPeter Wemm SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY, 1169b68618dSPeter Wemm (sysinit_cfunc_t) elf32_insert_brand_entry, 1179b68618dSPeter Wemm &freebsd_brand_oinfo); 1189b68618dSPeter Wemm 11989ffc202SBjoern A. Zeeb static Elf32_Brandinfo kfreebsd_brand_info = { 12089ffc202SBjoern A. Zeeb .brand = ELFOSABI_FREEBSD, 12189ffc202SBjoern A. Zeeb .machine = EM_386, 12289ffc202SBjoern A. Zeeb .compat_3_brand = "FreeBSD", 12389ffc202SBjoern A. Zeeb .emul_path = NULL, 12489ffc202SBjoern A. Zeeb .interp_path = "/lib/ld.so.1", 12589ffc202SBjoern A. Zeeb .sysvec = &elf32_freebsd_sysvec, 12689ffc202SBjoern A. Zeeb .interp_newpath = NULL, 12789ffc202SBjoern A. Zeeb .brand_note = &elf32_kfreebsd_brandnote, 128ecc2fda8SBjoern A. Zeeb .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY 12989ffc202SBjoern A. Zeeb }; 13089ffc202SBjoern A. Zeeb 13189ffc202SBjoern A. Zeeb SYSINIT(kelf32, SI_SUB_EXEC, SI_ORDER_ANY, 13289ffc202SBjoern A. Zeeb (sysinit_cfunc_t) elf32_insert_brand_entry, 13389ffc202SBjoern A. Zeeb &kfreebsd_brand_info); 13489ffc202SBjoern A. Zeeb 1354da47b2fSMarcel Moolenaar 1364da47b2fSMarcel Moolenaar void 1374da47b2fSMarcel Moolenaar elf32_dump_thread(struct thread *td __unused, void *dst __unused, 1384da47b2fSMarcel Moolenaar size_t *off __unused) 1394da47b2fSMarcel Moolenaar { 1404da47b2fSMarcel Moolenaar } 1414da47b2fSMarcel Moolenaar 1424da47b2fSMarcel Moolenaar 143bde362f5SPeter Wemm /* Process one elf relocation with addend. */ 1447251b4bfSJake Burkholder static int 145e8855d4fSPeter Wemm elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data, 146e8855d4fSPeter Wemm int type, int local, elf_lookup_fn lookup) 147033f58dfSPeter Wemm { 148aa855a59SPeter Wemm Elf_Addr *where; 149f1d19042SArchie Cobbs Elf_Addr addr; 150aa855a59SPeter Wemm Elf_Addr addend; 151d297ad16SMarcel Moolenaar Elf_Word rtype, symidx; 152aa855a59SPeter Wemm const Elf_Rel *rel; 153aa855a59SPeter Wemm const Elf_Rela *rela; 154033f58dfSPeter Wemm 155aa855a59SPeter Wemm switch (type) { 156aa855a59SPeter Wemm case ELF_RELOC_REL: 1570a5e03ddSMatthew Dillon rel = (const Elf_Rel *)data; 158aa855a59SPeter Wemm where = (Elf_Addr *) (relocbase + rel->r_offset); 159aa855a59SPeter Wemm addend = *where; 160aa855a59SPeter Wemm rtype = ELF_R_TYPE(rel->r_info); 161d297ad16SMarcel Moolenaar symidx = ELF_R_SYM(rel->r_info); 162aa855a59SPeter Wemm break; 163aa855a59SPeter Wemm case ELF_RELOC_RELA: 1640a5e03ddSMatthew Dillon rela = (const Elf_Rela *)data; 165aa855a59SPeter Wemm where = (Elf_Addr *) (relocbase + rela->r_offset); 166aa855a59SPeter Wemm addend = rela->r_addend; 167aa855a59SPeter Wemm rtype = ELF_R_TYPE(rela->r_info); 168d297ad16SMarcel Moolenaar symidx = ELF_R_SYM(rela->r_info); 169aa855a59SPeter Wemm break; 170aa855a59SPeter Wemm default: 171aa855a59SPeter Wemm panic("unknown reloc type %d\n", type); 172aa855a59SPeter Wemm } 173033f58dfSPeter Wemm 1747251b4bfSJake Burkholder if (local) { 1757251b4bfSJake Burkholder if (rtype == R_386_RELATIVE) { /* A + B */ 17650c202c5SJeff Roberson addr = elf_relocaddr(lf, relocbase + addend); 1777251b4bfSJake Burkholder if (*where != addr) 1787251b4bfSJake Burkholder *where = addr; 1797251b4bfSJake Burkholder } 1807251b4bfSJake Burkholder return (0); 1817251b4bfSJake Burkholder } 1827251b4bfSJake Burkholder 183aa855a59SPeter Wemm switch (rtype) { 184aa855a59SPeter Wemm 185aa855a59SPeter Wemm case R_386_NONE: /* none */ 186033f58dfSPeter Wemm break; 187033f58dfSPeter Wemm 188aa855a59SPeter Wemm case R_386_32: /* S + A */ 189e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 190369dc8ceSEivind Eklund if (addr == 0) 191033f58dfSPeter Wemm return -1; 192aa855a59SPeter Wemm addr += addend; 193033f58dfSPeter Wemm if (*where != addr) 194033f58dfSPeter Wemm *where = addr; 195033f58dfSPeter Wemm break; 196033f58dfSPeter Wemm 197aa855a59SPeter Wemm case R_386_PC32: /* S + A - P */ 198e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 199369dc8ceSEivind Eklund if (addr == 0) 200033f58dfSPeter Wemm return -1; 201aa855a59SPeter Wemm addr += addend - (Elf_Addr)where; 202033f58dfSPeter Wemm if (*where != addr) 203033f58dfSPeter Wemm *where = addr; 204033f58dfSPeter Wemm break; 205033f58dfSPeter Wemm 206aa855a59SPeter Wemm case R_386_COPY: /* none */ 207033f58dfSPeter Wemm /* 208033f58dfSPeter Wemm * There shouldn't be copy relocations in kernel 209033f58dfSPeter Wemm * objects. 210033f58dfSPeter Wemm */ 211033f58dfSPeter Wemm printf("kldload: unexpected R_COPY relocation\n"); 212033f58dfSPeter Wemm return -1; 213033f58dfSPeter Wemm break; 214033f58dfSPeter Wemm 215aa855a59SPeter Wemm case R_386_GLOB_DAT: /* S */ 216e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 217369dc8ceSEivind Eklund if (addr == 0) 218033f58dfSPeter Wemm return -1; 219033f58dfSPeter Wemm if (*where != addr) 220033f58dfSPeter Wemm *where = addr; 221033f58dfSPeter Wemm break; 222033f58dfSPeter Wemm 2237251b4bfSJake Burkholder case R_386_RELATIVE: 224033f58dfSPeter Wemm break; 225033f58dfSPeter Wemm 226033f58dfSPeter Wemm default: 227033f58dfSPeter Wemm printf("kldload: unexpected relocation type %d\n", 228aa855a59SPeter Wemm rtype); 229033f58dfSPeter Wemm return -1; 230033f58dfSPeter Wemm } 231033f58dfSPeter Wemm return(0); 232033f58dfSPeter Wemm } 2331aeb23cdSMarcel Moolenaar 2341aeb23cdSMarcel Moolenaar int 235e8855d4fSPeter Wemm elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type, 236e8855d4fSPeter Wemm elf_lookup_fn lookup) 2377251b4bfSJake Burkholder { 2387251b4bfSJake Burkholder 239e8855d4fSPeter Wemm return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup)); 2407251b4bfSJake Burkholder } 2417251b4bfSJake Burkholder 2427251b4bfSJake Burkholder int 243e8855d4fSPeter Wemm elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data, 244e8855d4fSPeter Wemm int type, elf_lookup_fn lookup) 2457251b4bfSJake Burkholder { 2467251b4bfSJake Burkholder 247e8855d4fSPeter Wemm return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup)); 2487251b4bfSJake Burkholder } 2497251b4bfSJake Burkholder 2507251b4bfSJake Burkholder int 2511aeb23cdSMarcel Moolenaar elf_cpu_load_file(linker_file_t lf __unused) 2521aeb23cdSMarcel Moolenaar { 2531aeb23cdSMarcel Moolenaar 2541aeb23cdSMarcel Moolenaar return (0); 2551aeb23cdSMarcel Moolenaar } 2561aeb23cdSMarcel Moolenaar 2571aeb23cdSMarcel Moolenaar int 2581aeb23cdSMarcel Moolenaar elf_cpu_unload_file(linker_file_t lf __unused) 2591aeb23cdSMarcel Moolenaar { 2601aeb23cdSMarcel Moolenaar 2611aeb23cdSMarcel Moolenaar return (0); 2621aeb23cdSMarcel Moolenaar } 263