1033f58dfSPeter Wemm /*- 283ef78beSPedro F. Giffuni * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 383ef78beSPedro F. Giffuni * 4033f58dfSPeter Wemm * Copyright 1996-1998 John D. Polstra. 5033f58dfSPeter Wemm * All rights reserved. 6033f58dfSPeter Wemm * 7033f58dfSPeter Wemm * Redistribution and use in source and binary forms, with or without 8033f58dfSPeter Wemm * modification, are permitted provided that the following conditions 9033f58dfSPeter Wemm * are met: 10033f58dfSPeter Wemm * 1. Redistributions of source code must retain the above copyright 11033f58dfSPeter Wemm * notice, this list of conditions and the following disclaimer. 12033f58dfSPeter Wemm * 2. Redistributions in binary form must reproduce the above copyright 13033f58dfSPeter Wemm * notice, this list of conditions and the following disclaimer in the 14033f58dfSPeter Wemm * documentation and/or other materials provided with the distribution. 15033f58dfSPeter Wemm * 16033f58dfSPeter Wemm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17033f58dfSPeter Wemm * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18033f58dfSPeter Wemm * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19033f58dfSPeter Wemm * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20033f58dfSPeter Wemm * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21033f58dfSPeter Wemm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22033f58dfSPeter Wemm * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23033f58dfSPeter Wemm * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24033f58dfSPeter Wemm * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25033f58dfSPeter Wemm * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26033f58dfSPeter Wemm */ 27033f58dfSPeter Wemm 289676a785SDavid E. O'Brien #include <sys/cdefs.h> 299676a785SDavid E. O'Brien __FBSDID("$FreeBSD$"); 309676a785SDavid E. O'Brien 316d2950a8SWarner Losh #include "opt_cpu.h" 326d2950a8SWarner Losh 33033f58dfSPeter Wemm #include <sys/param.h> 343ebc1248SPeter Wemm #include <sys/kernel.h> 35033f58dfSPeter Wemm #include <sys/systm.h> 36f36ba452SJake Burkholder #include <sys/exec.h> 37f36ba452SJake Burkholder #include <sys/imgact.h> 38033f58dfSPeter Wemm #include <sys/linker.h> 39afe1a688SKonstantin Belousov #include <sys/proc.h> 403ebc1248SPeter Wemm #include <sys/sysent.h> 413ebc1248SPeter Wemm #include <sys/imgact_elf.h> 423ebc1248SPeter Wemm #include <sys/syscall.h> 433ebc1248SPeter Wemm #include <sys/signalvar.h> 443ebc1248SPeter Wemm #include <sys/vnode.h> 45f36ba452SJake Burkholder 46f36ba452SJake Burkholder #include <vm/vm.h> 47f36ba452SJake Burkholder #include <vm/pmap.h> 48f36ba452SJake Burkholder #include <vm/vm_param.h> 49f36ba452SJake Burkholder 50033f58dfSPeter Wemm #include <machine/elf.h> 513ebc1248SPeter Wemm #include <machine/md_var.h> 52180e57e5SJohn Baldwin #include <machine/npx.h> 533ebc1248SPeter Wemm 543ebc1248SPeter Wemm struct sysentvec elf32_freebsd_sysvec = { 55a8d403e1SKonstantin Belousov .sv_size = SYS_MAXSYSCALL, 56a8d403e1SKonstantin Belousov .sv_table = sysent, 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_name = "FreeBSD ELF32", 63a8d403e1SKonstantin Belousov .sv_coredump = __elfN(coredump), 64a8d403e1SKonstantin Belousov .sv_imgact_try = NULL, 65a8d403e1SKonstantin Belousov .sv_minsigstksz = MINSIGSTKSZ, 66a8d403e1SKonstantin Belousov .sv_minuser = VM_MIN_ADDRESS, 67a8d403e1SKonstantin Belousov .sv_maxuser = VM_MAXUSER_ADDRESS, 68a8d403e1SKonstantin Belousov .sv_usrstack = USRSTACK, 69a8d403e1SKonstantin Belousov .sv_psstrings = PS_STRINGS, 70a8d403e1SKonstantin Belousov .sv_stackprot = VM_PROT_ALL, 71e3532331SJohn Baldwin .sv_copyout_auxargs = __elfN(freebsd_copyout_auxargs), 72a8d403e1SKonstantin Belousov .sv_copyout_strings = exec_copyout_strings, 73a8d403e1SKonstantin Belousov .sv_setregs = exec_setregs, 74a8d403e1SKonstantin Belousov .sv_fixlimit = NULL, 75b4cf0e62SKonstantin Belousov .sv_maxssiz = NULL, 76fa50a355SKonstantin Belousov .sv_flags = SV_ABI_FREEBSD | SV_ASLR | SV_IA32 | SV_ILP32 | 77fa50a355SKonstantin Belousov SV_SHP | SV_TIMEKEEP, 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, 8491d1786fSDmitry Chagin .sv_thread_detach = NULL, 85038c7205SDmitry Chagin .sv_trap = NULL, 863ebc1248SPeter Wemm }; 87d69ae412SKonstantin Belousov INIT_SYSENTVEC(elf32_sysvec, &elf32_freebsd_sysvec); 883ebc1248SPeter Wemm 893ebc1248SPeter Wemm static Elf32_Brandinfo freebsd_brand_info = { 90a8d403e1SKonstantin Belousov .brand = ELFOSABI_FREEBSD, 91a8d403e1SKonstantin Belousov .machine = EM_386, 92a8d403e1SKonstantin Belousov .compat_3_brand = "FreeBSD", 93a8d403e1SKonstantin Belousov .emul_path = NULL, 94a8d403e1SKonstantin Belousov .interp_path = "/libexec/ld-elf.so.1", 95a8d403e1SKonstantin Belousov .sysvec = &elf32_freebsd_sysvec, 96a8d403e1SKonstantin Belousov .interp_newpath = NULL, 9732c01de2SDmitry Chagin .brand_note = &elf32_freebsd_brandnote, 98cd899aadSDmitry Chagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 993ebc1248SPeter Wemm }; 1003ebc1248SPeter Wemm 10152bf2041SBjoern A. Zeeb SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST, 1023ebc1248SPeter Wemm (sysinit_cfunc_t) elf32_insert_brand_entry, 1033ebc1248SPeter Wemm &freebsd_brand_info); 104033f58dfSPeter Wemm 1059b68618dSPeter Wemm static Elf32_Brandinfo freebsd_brand_oinfo = { 106a8d403e1SKonstantin Belousov .brand = ELFOSABI_FREEBSD, 107a8d403e1SKonstantin Belousov .machine = EM_386, 108a8d403e1SKonstantin Belousov .compat_3_brand = "FreeBSD", 109a8d403e1SKonstantin Belousov .emul_path = NULL, 110a8d403e1SKonstantin Belousov .interp_path = "/usr/libexec/ld-elf.so.1", 111a8d403e1SKonstantin Belousov .sysvec = &elf32_freebsd_sysvec, 112a8d403e1SKonstantin Belousov .interp_newpath = NULL, 11332c01de2SDmitry Chagin .brand_note = &elf32_freebsd_brandnote, 114cd899aadSDmitry Chagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1159b68618dSPeter Wemm }; 1169b68618dSPeter Wemm 1179b68618dSPeter Wemm SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY, 1189b68618dSPeter Wemm (sysinit_cfunc_t) elf32_insert_brand_entry, 1199b68618dSPeter Wemm &freebsd_brand_oinfo); 1209b68618dSPeter Wemm 12189ffc202SBjoern A. Zeeb static Elf32_Brandinfo kfreebsd_brand_info = { 12289ffc202SBjoern A. Zeeb .brand = ELFOSABI_FREEBSD, 12389ffc202SBjoern A. Zeeb .machine = EM_386, 12489ffc202SBjoern A. Zeeb .compat_3_brand = "FreeBSD", 12589ffc202SBjoern A. Zeeb .emul_path = NULL, 12689ffc202SBjoern A. Zeeb .interp_path = "/lib/ld.so.1", 12789ffc202SBjoern A. Zeeb .sysvec = &elf32_freebsd_sysvec, 12889ffc202SBjoern A. Zeeb .interp_newpath = NULL, 12989ffc202SBjoern A. Zeeb .brand_note = &elf32_kfreebsd_brandnote, 130ecc2fda8SBjoern A. Zeeb .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY 13189ffc202SBjoern A. Zeeb }; 13289ffc202SBjoern A. Zeeb 13389ffc202SBjoern A. Zeeb SYSINIT(kelf32, SI_SUB_EXEC, SI_ORDER_ANY, 13489ffc202SBjoern A. Zeeb (sysinit_cfunc_t) elf32_insert_brand_entry, 13589ffc202SBjoern A. Zeeb &kfreebsd_brand_info); 13689ffc202SBjoern A. Zeeb 1374da47b2fSMarcel Moolenaar void 138180e57e5SJohn Baldwin elf32_dump_thread(struct thread *td, void *dst, size_t *off) 1394da47b2fSMarcel Moolenaar { 140180e57e5SJohn Baldwin void *buf; 141180e57e5SJohn Baldwin size_t len; 1424da47b2fSMarcel Moolenaar 143180e57e5SJohn Baldwin len = 0; 144180e57e5SJohn Baldwin if (use_xsave) { 145180e57e5SJohn Baldwin if (dst != NULL) { 146180e57e5SJohn Baldwin npxgetregs(td); 147180e57e5SJohn Baldwin len += elf32_populate_note(NT_X86_XSTATE, 148180e57e5SJohn Baldwin get_pcb_user_save_td(td), dst, 149180e57e5SJohn Baldwin cpu_max_ext_state_size, &buf); 150180e57e5SJohn Baldwin *(uint64_t *)((char *)buf + X86_XSTATE_XCR0_OFFSET) = 151180e57e5SJohn Baldwin xsave_mask; 152180e57e5SJohn Baldwin } else 153180e57e5SJohn Baldwin len += elf32_populate_note(NT_X86_XSTATE, NULL, NULL, 154180e57e5SJohn Baldwin cpu_max_ext_state_size, NULL); 155180e57e5SJohn Baldwin } 156180e57e5SJohn Baldwin *off = len; 157180e57e5SJohn Baldwin } 1584da47b2fSMarcel Moolenaar 15936716fe2SMark Johnston bool 16036716fe2SMark Johnston elf_is_ifunc_reloc(Elf_Size r_info) 16136716fe2SMark Johnston { 16236716fe2SMark Johnston 16336716fe2SMark Johnston return (ELF_R_TYPE(r_info) == R_386_IRELATIVE); 16436716fe2SMark Johnston } 16536716fe2SMark Johnston 1667035cf14SKonstantin Belousov #define ERI_LOCAL 0x0001 1677035cf14SKonstantin Belousov 168bde362f5SPeter Wemm /* Process one elf relocation with addend. */ 1697251b4bfSJake Burkholder static int 170e8855d4fSPeter Wemm elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data, 1717035cf14SKonstantin Belousov int type, elf_lookup_fn lookup, int flags) 172033f58dfSPeter Wemm { 173aa855a59SPeter Wemm Elf_Addr *where; 174f1d19042SArchie Cobbs Elf_Addr addr; 175aa855a59SPeter Wemm Elf_Addr addend; 176d297ad16SMarcel Moolenaar Elf_Word rtype, symidx; 177aa855a59SPeter Wemm const Elf_Rel *rel; 178aa855a59SPeter Wemm const Elf_Rela *rela; 179cff8c6f2SKonstantin Belousov int error; 180033f58dfSPeter Wemm 181aa855a59SPeter Wemm switch (type) { 182aa855a59SPeter Wemm case ELF_RELOC_REL: 1830a5e03ddSMatthew Dillon rel = (const Elf_Rel *)data; 184aa855a59SPeter Wemm where = (Elf_Addr *) (relocbase + rel->r_offset); 185aa855a59SPeter Wemm addend = *where; 186aa855a59SPeter Wemm rtype = ELF_R_TYPE(rel->r_info); 187d297ad16SMarcel Moolenaar symidx = ELF_R_SYM(rel->r_info); 188aa855a59SPeter Wemm break; 189aa855a59SPeter Wemm case ELF_RELOC_RELA: 1900a5e03ddSMatthew Dillon rela = (const Elf_Rela *)data; 191aa855a59SPeter Wemm where = (Elf_Addr *) (relocbase + rela->r_offset); 192aa855a59SPeter Wemm addend = rela->r_addend; 193aa855a59SPeter Wemm rtype = ELF_R_TYPE(rela->r_info); 194d297ad16SMarcel Moolenaar symidx = ELF_R_SYM(rela->r_info); 195aa855a59SPeter Wemm break; 196aa855a59SPeter Wemm default: 197aa855a59SPeter Wemm panic("unknown reloc type %d\n", type); 198aa855a59SPeter Wemm } 199033f58dfSPeter Wemm 2007035cf14SKonstantin Belousov if ((flags & ERI_LOCAL) != 0) { 2017251b4bfSJake Burkholder if (rtype == R_386_RELATIVE) { /* A + B */ 20250c202c5SJeff Roberson addr = elf_relocaddr(lf, relocbase + addend); 2037251b4bfSJake Burkholder if (*where != addr) 2047251b4bfSJake Burkholder *where = addr; 2057251b4bfSJake Burkholder } 2067251b4bfSJake Burkholder return (0); 2077251b4bfSJake Burkholder } 2087251b4bfSJake Burkholder 209aa855a59SPeter Wemm switch (rtype) { 210aa855a59SPeter Wemm case R_386_NONE: /* none */ 211033f58dfSPeter Wemm break; 212033f58dfSPeter Wemm 213aa855a59SPeter Wemm case R_386_32: /* S + A */ 214cff8c6f2SKonstantin Belousov error = lookup(lf, symidx, 1, &addr); 215cff8c6f2SKonstantin Belousov if (error != 0) 2168481aab1SMitchell Horne return (-1); 217aa855a59SPeter Wemm addr += addend; 218033f58dfSPeter Wemm if (*where != addr) 219033f58dfSPeter Wemm *where = addr; 220033f58dfSPeter Wemm break; 221033f58dfSPeter Wemm 222aa855a59SPeter Wemm case R_386_PC32: /* S + A - P */ 223cff8c6f2SKonstantin Belousov error = lookup(lf, symidx, 1, &addr); 224cff8c6f2SKonstantin Belousov if (error != 0) 2258481aab1SMitchell Horne return (-1); 226aa855a59SPeter Wemm addr += addend - (Elf_Addr)where; 227033f58dfSPeter Wemm if (*where != addr) 228033f58dfSPeter Wemm *where = addr; 229033f58dfSPeter Wemm break; 230033f58dfSPeter Wemm 231aa855a59SPeter Wemm case R_386_COPY: /* none */ 232033f58dfSPeter Wemm /* 233033f58dfSPeter Wemm * There shouldn't be copy relocations in kernel 234033f58dfSPeter Wemm * objects. 235033f58dfSPeter Wemm */ 2368481aab1SMitchell Horne printf("kldload: unexpected R_COPY relocation, " 2378481aab1SMitchell Horne "symbol index %d\n", symidx); 2388481aab1SMitchell Horne return (-1); 239033f58dfSPeter Wemm break; 240033f58dfSPeter Wemm 241aa855a59SPeter Wemm case R_386_GLOB_DAT: /* S */ 242cff8c6f2SKonstantin Belousov error = lookup(lf, symidx, 1, &addr); 243cff8c6f2SKonstantin Belousov if (error != 0) 2448481aab1SMitchell Horne return (-1); 245033f58dfSPeter Wemm if (*where != addr) 246033f58dfSPeter Wemm *where = addr; 247033f58dfSPeter Wemm break; 248033f58dfSPeter Wemm 2497251b4bfSJake Burkholder case R_386_RELATIVE: 250033f58dfSPeter Wemm break; 251033f58dfSPeter Wemm 2527035cf14SKonstantin Belousov case R_386_IRELATIVE: 2537035cf14SKonstantin Belousov addr = relocbase + addend; 2547035cf14SKonstantin Belousov addr = ((Elf_Addr (*)(void))addr)(); 2557035cf14SKonstantin Belousov if (*where != addr) 2567035cf14SKonstantin Belousov *where = addr; 2577035cf14SKonstantin Belousov break; 258033f58dfSPeter Wemm default: 2598481aab1SMitchell Horne printf("kldload: unexpected relocation type %d, " 2608481aab1SMitchell Horne "symbol index %d\n", rtype, symidx); 2618481aab1SMitchell Horne return (-1); 262033f58dfSPeter Wemm } 263033f58dfSPeter Wemm return(0); 264033f58dfSPeter Wemm } 2651aeb23cdSMarcel Moolenaar 2661aeb23cdSMarcel Moolenaar int 267e8855d4fSPeter Wemm elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type, 268e8855d4fSPeter Wemm elf_lookup_fn lookup) 2697251b4bfSJake Burkholder { 2707251b4bfSJake Burkholder 2717035cf14SKonstantin Belousov return (elf_reloc_internal(lf, relocbase, data, type, lookup, 0)); 2727251b4bfSJake Burkholder } 2737251b4bfSJake Burkholder 2747251b4bfSJake Burkholder int 275e8855d4fSPeter Wemm elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data, 276e8855d4fSPeter Wemm int type, elf_lookup_fn lookup) 2777251b4bfSJake Burkholder { 2787251b4bfSJake Burkholder 2797035cf14SKonstantin Belousov return (elf_reloc_internal(lf, relocbase, data, type, lookup, 2807035cf14SKonstantin Belousov ERI_LOCAL)); 2817251b4bfSJake Burkholder } 2827251b4bfSJake Burkholder 2837251b4bfSJake Burkholder int 2841aeb23cdSMarcel Moolenaar elf_cpu_load_file(linker_file_t lf __unused) 2851aeb23cdSMarcel Moolenaar { 2861aeb23cdSMarcel Moolenaar 2871aeb23cdSMarcel Moolenaar return (0); 2881aeb23cdSMarcel Moolenaar } 2891aeb23cdSMarcel Moolenaar 2901aeb23cdSMarcel Moolenaar int 2911aeb23cdSMarcel Moolenaar elf_cpu_unload_file(linker_file_t lf __unused) 2921aeb23cdSMarcel Moolenaar { 2931aeb23cdSMarcel Moolenaar 2941aeb23cdSMarcel Moolenaar return (0); 2951aeb23cdSMarcel Moolenaar } 2967821a820SBrandon Bergren 2977821a820SBrandon Bergren int 29830693808SBrandon Bergren elf_cpu_parse_dynamic(caddr_t loadbase __unused, Elf_Dyn *dynamic __unused) 2997821a820SBrandon Bergren { 3007821a820SBrandon Bergren 3017821a820SBrandon Bergren return (0); 3027821a820SBrandon Bergren } 303