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> 48180e57e5SJohn Baldwin #include <machine/npx.h> 493ebc1248SPeter Wemm 503ebc1248SPeter Wemm struct sysentvec elf32_freebsd_sysvec = { 51a8d403e1SKonstantin Belousov .sv_size = SYS_MAXSYSCALL, 52a8d403e1SKonstantin Belousov .sv_table = sysent, 53a8d403e1SKonstantin Belousov .sv_mask = 0, 54a8d403e1SKonstantin Belousov .sv_sigsize = 0, 55a8d403e1SKonstantin Belousov .sv_sigtbl = NULL, 56a8d403e1SKonstantin Belousov .sv_errsize = 0, 57a8d403e1SKonstantin Belousov .sv_errtbl = NULL, 58a8d403e1SKonstantin Belousov .sv_transtrap = NULL, 59a8d403e1SKonstantin Belousov .sv_fixup = __elfN(freebsd_fixup), 60a8d403e1SKonstantin Belousov .sv_sendsig = sendsig, 61a8d403e1SKonstantin Belousov .sv_sigcode = sigcode, 62a8d403e1SKonstantin Belousov .sv_szsigcode = &szsigcode, 63a8d403e1SKonstantin Belousov .sv_prepsyscall = NULL, 64a8d403e1SKonstantin Belousov .sv_name = "FreeBSD ELF32", 65a8d403e1SKonstantin Belousov .sv_coredump = __elfN(coredump), 66a8d403e1SKonstantin Belousov .sv_imgact_try = NULL, 67a8d403e1SKonstantin Belousov .sv_minsigstksz = MINSIGSTKSZ, 68a8d403e1SKonstantin Belousov .sv_pagesize = PAGE_SIZE, 69a8d403e1SKonstantin Belousov .sv_minuser = VM_MIN_ADDRESS, 70a8d403e1SKonstantin Belousov .sv_maxuser = VM_MAXUSER_ADDRESS, 71a8d403e1SKonstantin Belousov .sv_usrstack = USRSTACK, 72a8d403e1SKonstantin Belousov .sv_psstrings = PS_STRINGS, 73a8d403e1SKonstantin Belousov .sv_stackprot = VM_PROT_ALL, 74a8d403e1SKonstantin Belousov .sv_copyout_strings = exec_copyout_strings, 75a8d403e1SKonstantin Belousov .sv_setregs = exec_setregs, 76a8d403e1SKonstantin Belousov .sv_fixlimit = NULL, 77b4cf0e62SKonstantin Belousov .sv_maxssiz = NULL, 78d69ae412SKonstantin Belousov .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32 | SV_SHP, 79afe1a688SKonstantin Belousov .sv_set_syscall_retval = cpu_set_syscall_retval, 80afe1a688SKonstantin Belousov .sv_fetch_syscall_args = cpu_fetch_syscall_args, 81afe1a688SKonstantin Belousov .sv_syscallnames = syscallnames, 82d69ae412SKonstantin Belousov .sv_shared_page_base = SHAREDPAGE, 83d69ae412SKonstantin Belousov .sv_shared_page_len = PAGE_SIZE, 84e5d81ef1SDmitry Chagin .sv_schedtail = NULL, 853ebc1248SPeter Wemm }; 86d69ae412SKonstantin Belousov INIT_SYSENTVEC(elf32_sysvec, &elf32_freebsd_sysvec); 873ebc1248SPeter Wemm 883ebc1248SPeter Wemm static Elf32_Brandinfo freebsd_brand_info = { 89a8d403e1SKonstantin Belousov .brand = ELFOSABI_FREEBSD, 90a8d403e1SKonstantin Belousov .machine = EM_386, 91a8d403e1SKonstantin Belousov .compat_3_brand = "FreeBSD", 92a8d403e1SKonstantin Belousov .emul_path = NULL, 93a8d403e1SKonstantin Belousov .interp_path = "/libexec/ld-elf.so.1", 94a8d403e1SKonstantin Belousov .sysvec = &elf32_freebsd_sysvec, 95a8d403e1SKonstantin Belousov .interp_newpath = NULL, 9632c01de2SDmitry Chagin .brand_note = &elf32_freebsd_brandnote, 97cd899aadSDmitry Chagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 983ebc1248SPeter Wemm }; 993ebc1248SPeter Wemm 10052bf2041SBjoern A. Zeeb SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST, 1013ebc1248SPeter Wemm (sysinit_cfunc_t) elf32_insert_brand_entry, 1023ebc1248SPeter Wemm &freebsd_brand_info); 103033f58dfSPeter Wemm 1049b68618dSPeter Wemm static Elf32_Brandinfo freebsd_brand_oinfo = { 105a8d403e1SKonstantin Belousov .brand = ELFOSABI_FREEBSD, 106a8d403e1SKonstantin Belousov .machine = EM_386, 107a8d403e1SKonstantin Belousov .compat_3_brand = "FreeBSD", 108a8d403e1SKonstantin Belousov .emul_path = NULL, 109a8d403e1SKonstantin Belousov .interp_path = "/usr/libexec/ld-elf.so.1", 110a8d403e1SKonstantin Belousov .sysvec = &elf32_freebsd_sysvec, 111a8d403e1SKonstantin Belousov .interp_newpath = NULL, 11232c01de2SDmitry Chagin .brand_note = &elf32_freebsd_brandnote, 113cd899aadSDmitry Chagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1149b68618dSPeter Wemm }; 1159b68618dSPeter Wemm 1169b68618dSPeter Wemm SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY, 1179b68618dSPeter Wemm (sysinit_cfunc_t) elf32_insert_brand_entry, 1189b68618dSPeter Wemm &freebsd_brand_oinfo); 1199b68618dSPeter Wemm 12089ffc202SBjoern A. Zeeb static Elf32_Brandinfo kfreebsd_brand_info = { 12189ffc202SBjoern A. Zeeb .brand = ELFOSABI_FREEBSD, 12289ffc202SBjoern A. Zeeb .machine = EM_386, 12389ffc202SBjoern A. Zeeb .compat_3_brand = "FreeBSD", 12489ffc202SBjoern A. Zeeb .emul_path = NULL, 12589ffc202SBjoern A. Zeeb .interp_path = "/lib/ld.so.1", 12689ffc202SBjoern A. Zeeb .sysvec = &elf32_freebsd_sysvec, 12789ffc202SBjoern A. Zeeb .interp_newpath = NULL, 12889ffc202SBjoern A. Zeeb .brand_note = &elf32_kfreebsd_brandnote, 129ecc2fda8SBjoern A. Zeeb .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY 13089ffc202SBjoern A. Zeeb }; 13189ffc202SBjoern A. Zeeb 13289ffc202SBjoern A. Zeeb SYSINIT(kelf32, SI_SUB_EXEC, SI_ORDER_ANY, 13389ffc202SBjoern A. Zeeb (sysinit_cfunc_t) elf32_insert_brand_entry, 13489ffc202SBjoern A. Zeeb &kfreebsd_brand_info); 13589ffc202SBjoern A. Zeeb 1364da47b2fSMarcel Moolenaar 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 159bde362f5SPeter Wemm /* Process one elf relocation with addend. */ 1607251b4bfSJake Burkholder static int 161e8855d4fSPeter Wemm elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data, 162e8855d4fSPeter Wemm int type, int local, elf_lookup_fn lookup) 163033f58dfSPeter Wemm { 164aa855a59SPeter Wemm Elf_Addr *where; 165f1d19042SArchie Cobbs Elf_Addr addr; 166aa855a59SPeter Wemm Elf_Addr addend; 167d297ad16SMarcel Moolenaar Elf_Word rtype, symidx; 168aa855a59SPeter Wemm const Elf_Rel *rel; 169aa855a59SPeter Wemm const Elf_Rela *rela; 170033f58dfSPeter Wemm 171aa855a59SPeter Wemm switch (type) { 172aa855a59SPeter Wemm case ELF_RELOC_REL: 1730a5e03ddSMatthew Dillon rel = (const Elf_Rel *)data; 174aa855a59SPeter Wemm where = (Elf_Addr *) (relocbase + rel->r_offset); 175aa855a59SPeter Wemm addend = *where; 176aa855a59SPeter Wemm rtype = ELF_R_TYPE(rel->r_info); 177d297ad16SMarcel Moolenaar symidx = ELF_R_SYM(rel->r_info); 178aa855a59SPeter Wemm break; 179aa855a59SPeter Wemm case ELF_RELOC_RELA: 1800a5e03ddSMatthew Dillon rela = (const Elf_Rela *)data; 181aa855a59SPeter Wemm where = (Elf_Addr *) (relocbase + rela->r_offset); 182aa855a59SPeter Wemm addend = rela->r_addend; 183aa855a59SPeter Wemm rtype = ELF_R_TYPE(rela->r_info); 184d297ad16SMarcel Moolenaar symidx = ELF_R_SYM(rela->r_info); 185aa855a59SPeter Wemm break; 186aa855a59SPeter Wemm default: 187aa855a59SPeter Wemm panic("unknown reloc type %d\n", type); 188aa855a59SPeter Wemm } 189033f58dfSPeter Wemm 1907251b4bfSJake Burkholder if (local) { 1917251b4bfSJake Burkholder if (rtype == R_386_RELATIVE) { /* A + B */ 19250c202c5SJeff Roberson addr = elf_relocaddr(lf, relocbase + addend); 1937251b4bfSJake Burkholder if (*where != addr) 1947251b4bfSJake Burkholder *where = addr; 1957251b4bfSJake Burkholder } 1967251b4bfSJake Burkholder return (0); 1977251b4bfSJake Burkholder } 1987251b4bfSJake Burkholder 199aa855a59SPeter Wemm switch (rtype) { 200aa855a59SPeter Wemm 201aa855a59SPeter Wemm case R_386_NONE: /* none */ 202033f58dfSPeter Wemm break; 203033f58dfSPeter Wemm 204aa855a59SPeter Wemm case R_386_32: /* S + A */ 205e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 206369dc8ceSEivind Eklund if (addr == 0) 207033f58dfSPeter Wemm return -1; 208aa855a59SPeter Wemm addr += addend; 209033f58dfSPeter Wemm if (*where != addr) 210033f58dfSPeter Wemm *where = addr; 211033f58dfSPeter Wemm break; 212033f58dfSPeter Wemm 213aa855a59SPeter Wemm case R_386_PC32: /* S + A - P */ 214e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 215369dc8ceSEivind Eklund if (addr == 0) 216033f58dfSPeter Wemm return -1; 217aa855a59SPeter Wemm addr += addend - (Elf_Addr)where; 218033f58dfSPeter Wemm if (*where != addr) 219033f58dfSPeter Wemm *where = addr; 220033f58dfSPeter Wemm break; 221033f58dfSPeter Wemm 222aa855a59SPeter Wemm case R_386_COPY: /* none */ 223033f58dfSPeter Wemm /* 224033f58dfSPeter Wemm * There shouldn't be copy relocations in kernel 225033f58dfSPeter Wemm * objects. 226033f58dfSPeter Wemm */ 227033f58dfSPeter Wemm printf("kldload: unexpected R_COPY relocation\n"); 228033f58dfSPeter Wemm return -1; 229033f58dfSPeter Wemm break; 230033f58dfSPeter Wemm 231aa855a59SPeter Wemm case R_386_GLOB_DAT: /* S */ 232e8855d4fSPeter Wemm addr = lookup(lf, symidx, 1); 233369dc8ceSEivind Eklund if (addr == 0) 234033f58dfSPeter Wemm return -1; 235033f58dfSPeter Wemm if (*where != addr) 236033f58dfSPeter Wemm *where = addr; 237033f58dfSPeter Wemm break; 238033f58dfSPeter Wemm 2397251b4bfSJake Burkholder case R_386_RELATIVE: 240033f58dfSPeter Wemm break; 241033f58dfSPeter Wemm 242033f58dfSPeter Wemm default: 243033f58dfSPeter Wemm printf("kldload: unexpected relocation type %d\n", 244aa855a59SPeter Wemm rtype); 245033f58dfSPeter Wemm return -1; 246033f58dfSPeter Wemm } 247033f58dfSPeter Wemm return(0); 248033f58dfSPeter Wemm } 2491aeb23cdSMarcel Moolenaar 2501aeb23cdSMarcel Moolenaar int 251e8855d4fSPeter Wemm elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type, 252e8855d4fSPeter Wemm elf_lookup_fn lookup) 2537251b4bfSJake Burkholder { 2547251b4bfSJake Burkholder 255e8855d4fSPeter Wemm return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup)); 2567251b4bfSJake Burkholder } 2577251b4bfSJake Burkholder 2587251b4bfSJake Burkholder int 259e8855d4fSPeter Wemm elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data, 260e8855d4fSPeter Wemm int type, elf_lookup_fn lookup) 2617251b4bfSJake Burkholder { 2627251b4bfSJake Burkholder 263e8855d4fSPeter Wemm return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup)); 2647251b4bfSJake Burkholder } 2657251b4bfSJake Burkholder 2667251b4bfSJake Burkholder int 2671aeb23cdSMarcel Moolenaar elf_cpu_load_file(linker_file_t lf __unused) 2681aeb23cdSMarcel Moolenaar { 2691aeb23cdSMarcel Moolenaar 2701aeb23cdSMarcel Moolenaar return (0); 2711aeb23cdSMarcel Moolenaar } 2721aeb23cdSMarcel Moolenaar 2731aeb23cdSMarcel Moolenaar int 2741aeb23cdSMarcel Moolenaar elf_cpu_unload_file(linker_file_t lf __unused) 2751aeb23cdSMarcel Moolenaar { 2761aeb23cdSMarcel Moolenaar 2771aeb23cdSMarcel Moolenaar return (0); 2781aeb23cdSMarcel Moolenaar } 279