1 /*- 2 * Copyright (c) 2002 Doug Rabson 3 * Copyright (c) 2003 Peter Wemm 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include "opt_compat.h" 32 33 #define __ELF_WORD_SIZE 32 34 35 #include <sys/param.h> 36 #include <sys/exec.h> 37 #include <sys/fcntl.h> 38 #include <sys/imgact.h> 39 #include <sys/kernel.h> 40 #include <sys/lock.h> 41 #include <sys/malloc.h> 42 #include <sys/mutex.h> 43 #include <sys/mman.h> 44 #include <sys/namei.h> 45 #include <sys/pioctl.h> 46 #include <sys/proc.h> 47 #include <sys/procfs.h> 48 #include <sys/resourcevar.h> 49 #include <sys/systm.h> 50 #include <sys/signalvar.h> 51 #include <sys/stat.h> 52 #include <sys/sx.h> 53 #include <sys/syscall.h> 54 #include <sys/sysctl.h> 55 #include <sys/sysent.h> 56 #include <sys/vnode.h> 57 #include <sys/imgact_elf.h> 58 59 #include <vm/vm.h> 60 #include <vm/vm_kern.h> 61 #include <vm/vm_param.h> 62 #include <vm/pmap.h> 63 #include <vm/vm_map.h> 64 #include <vm/vm_object.h> 65 #include <vm/vm_extern.h> 66 67 #include <compat/freebsd32/freebsd32_signal.h> 68 #include <compat/freebsd32/freebsd32_util.h> 69 #include <compat/freebsd32/freebsd32_proto.h> 70 #include <compat/freebsd32/freebsd32_syscall.h> 71 #include <compat/ia32/ia32_signal.h> 72 #ifdef __amd64__ 73 #include <machine/psl.h> 74 #include <machine/segments.h> 75 #include <machine/specialreg.h> 76 #else 77 #include <i386/include/psl.h> 78 #include <i386/include/segments.h> 79 #include <i386/include/specialreg.h> 80 #endif 81 #include <machine/frame.h> 82 #include <machine/md_var.h> 83 #include <machine/pcb.h> 84 #include <machine/cpufunc.h> 85 86 CTASSERT(sizeof(struct ia32_mcontext) == 640); 87 CTASSERT(sizeof(struct ia32_ucontext) == 704); 88 CTASSERT(sizeof(struct ia32_sigframe) == 800); 89 CTASSERT(sizeof(struct siginfo32) == 64); 90 #ifdef COMPAT_FREEBSD4 91 CTASSERT(sizeof(struct ia32_mcontext4) == 260); 92 CTASSERT(sizeof(struct ia32_ucontext4) == 324); 93 CTASSERT(sizeof(struct ia32_sigframe4) == 408); 94 #endif 95 96 extern const char *freebsd32_syscallnames[]; 97 98 static void ia32_fixlimit(struct rlimit *rl, int which); 99 100 SYSCTL_NODE(_compat, OID_AUTO, ia32, CTLFLAG_RW, 0, "ia32 mode"); 101 102 static u_long ia32_maxdsiz = IA32_MAXDSIZ; 103 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxdsiz, CTLFLAG_RW, &ia32_maxdsiz, 0, ""); 104 TUNABLE_ULONG("compat.ia32.maxdsiz", &ia32_maxdsiz); 105 static u_long ia32_maxssiz = IA32_MAXSSIZ; 106 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxssiz, CTLFLAG_RW, &ia32_maxssiz, 0, ""); 107 TUNABLE_ULONG("compat.ia32.maxssiz", &ia32_maxssiz); 108 static u_long ia32_maxvmem = IA32_MAXVMEM; 109 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxvmem, CTLFLAG_RW, &ia32_maxvmem, 0, ""); 110 TUNABLE_ULONG("compat.ia32.maxvmem", &ia32_maxvmem); 111 112 struct sysentvec ia32_freebsd_sysvec = { 113 .sv_size = FREEBSD32_SYS_MAXSYSCALL, 114 .sv_table = freebsd32_sysent, 115 .sv_mask = 0, 116 .sv_sigsize = 0, 117 .sv_sigtbl = NULL, 118 .sv_errsize = 0, 119 .sv_errtbl = NULL, 120 .sv_transtrap = NULL, 121 .sv_fixup = elf32_freebsd_fixup, 122 .sv_sendsig = ia32_sendsig, 123 .sv_sigcode = ia32_sigcode, 124 .sv_szsigcode = &sz_ia32_sigcode, 125 .sv_prepsyscall = NULL, 126 .sv_name = "FreeBSD ELF32", 127 .sv_coredump = elf32_coredump, 128 .sv_imgact_try = NULL, 129 .sv_minsigstksz = MINSIGSTKSZ, 130 .sv_pagesize = IA32_PAGE_SIZE, 131 .sv_minuser = 0, 132 .sv_maxuser = FREEBSD32_USRSTACK, 133 .sv_usrstack = FREEBSD32_USRSTACK, 134 .sv_psstrings = FREEBSD32_PS_STRINGS, 135 .sv_stackprot = VM_PROT_ALL, 136 .sv_copyout_strings = freebsd32_copyout_strings, 137 .sv_setregs = ia32_setregs, 138 .sv_fixlimit = ia32_fixlimit, 139 .sv_maxssiz = &ia32_maxssiz, 140 .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32, 141 .sv_set_syscall_retval = ia32_set_syscall_retval, 142 .sv_fetch_syscall_args = ia32_fetch_syscall_args, 143 .sv_syscallnames = freebsd32_syscallnames, 144 }; 145 146 147 static Elf32_Brandinfo ia32_brand_info = { 148 .brand = ELFOSABI_FREEBSD, 149 .machine = EM_386, 150 .compat_3_brand = "FreeBSD", 151 .emul_path = NULL, 152 .interp_path = "/libexec/ld-elf.so.1", 153 .sysvec = &ia32_freebsd_sysvec, 154 .interp_newpath = "/libexec/ld-elf32.so.1", 155 .brand_note = &elf32_freebsd_brandnote, 156 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 157 }; 158 159 SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_MIDDLE, 160 (sysinit_cfunc_t) elf32_insert_brand_entry, 161 &ia32_brand_info); 162 163 static Elf32_Brandinfo ia32_brand_oinfo = { 164 .brand = ELFOSABI_FREEBSD, 165 .machine = EM_386, 166 .compat_3_brand = "FreeBSD", 167 .emul_path = NULL, 168 .interp_path = "/usr/libexec/ld-elf.so.1", 169 .sysvec = &ia32_freebsd_sysvec, 170 .interp_newpath = "/libexec/ld-elf32.so.1", 171 .brand_note = &elf32_freebsd_brandnote, 172 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 173 }; 174 175 SYSINIT(oia32, SI_SUB_EXEC, SI_ORDER_ANY, 176 (sysinit_cfunc_t) elf32_insert_brand_entry, 177 &ia32_brand_oinfo); 178 179 static Elf32_Brandinfo kia32_brand_info = { 180 .brand = ELFOSABI_FREEBSD, 181 .machine = EM_386, 182 .compat_3_brand = "FreeBSD", 183 .emul_path = NULL, 184 .interp_path = "/lib/ld.so.1", 185 .sysvec = &ia32_freebsd_sysvec, 186 .brand_note = &elf32_kfreebsd_brandnote, 187 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY 188 }; 189 190 SYSINIT(kia32, SI_SUB_EXEC, SI_ORDER_ANY, 191 (sysinit_cfunc_t) elf32_insert_brand_entry, 192 &kia32_brand_info); 193 194 195 void 196 elf32_dump_thread(struct thread *td __unused, void *dst __unused, 197 size_t *off __unused) 198 { 199 } 200 201 static void 202 ia32_fixlimit(struct rlimit *rl, int which) 203 { 204 205 switch (which) { 206 case RLIMIT_DATA: 207 if (ia32_maxdsiz != 0) { 208 if (rl->rlim_cur > ia32_maxdsiz) 209 rl->rlim_cur = ia32_maxdsiz; 210 if (rl->rlim_max > ia32_maxdsiz) 211 rl->rlim_max = ia32_maxdsiz; 212 } 213 break; 214 case RLIMIT_STACK: 215 if (ia32_maxssiz != 0) { 216 if (rl->rlim_cur > ia32_maxssiz) 217 rl->rlim_cur = ia32_maxssiz; 218 if (rl->rlim_max > ia32_maxssiz) 219 rl->rlim_max = ia32_maxssiz; 220 } 221 break; 222 case RLIMIT_VMEM: 223 if (ia32_maxvmem != 0) { 224 if (rl->rlim_cur > ia32_maxvmem) 225 rl->rlim_cur = ia32_maxvmem; 226 if (rl->rlim_max > ia32_maxvmem) 227 rl->rlim_max = ia32_maxvmem; 228 } 229 break; 230 } 231 } 232