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 #include <machine/frame.h> 73 #include <machine/md_var.h> 74 #include <machine/pcb.h> 75 #include <machine/cpufunc.h> 76 77 CTASSERT(sizeof(struct ia32_mcontext) == 640); 78 CTASSERT(sizeof(struct ia32_ucontext) == 704); 79 CTASSERT(sizeof(struct ia32_sigframe) == 800); 80 CTASSERT(sizeof(struct siginfo32) == 64); 81 #ifdef COMPAT_FREEBSD4 82 CTASSERT(sizeof(struct ia32_mcontext4) == 260); 83 CTASSERT(sizeof(struct ia32_ucontext4) == 324); 84 CTASSERT(sizeof(struct ia32_sigframe4) == 408); 85 #endif 86 87 extern const char *freebsd32_syscallnames[]; 88 89 static SYSCTL_NODE(_compat, OID_AUTO, ia32, CTLFLAG_RW, 0, "ia32 mode"); 90 91 static u_long ia32_maxdsiz = IA32_MAXDSIZ; 92 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxdsiz, CTLFLAG_RWTUN, &ia32_maxdsiz, 0, ""); 93 u_long ia32_maxssiz = IA32_MAXSSIZ; 94 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxssiz, CTLFLAG_RWTUN, &ia32_maxssiz, 0, ""); 95 static u_long ia32_maxvmem = IA32_MAXVMEM; 96 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxvmem, CTLFLAG_RWTUN, &ia32_maxvmem, 0, ""); 97 98 struct sysentvec ia32_freebsd_sysvec = { 99 .sv_size = FREEBSD32_SYS_MAXSYSCALL, 100 .sv_table = freebsd32_sysent, 101 .sv_mask = 0, 102 .sv_errsize = 0, 103 .sv_errtbl = NULL, 104 .sv_transtrap = NULL, 105 .sv_fixup = elf32_freebsd_fixup, 106 .sv_sendsig = ia32_sendsig, 107 .sv_sigcode = ia32_sigcode, 108 .sv_szsigcode = &sz_ia32_sigcode, 109 .sv_name = "FreeBSD ELF32", 110 .sv_coredump = elf32_coredump, 111 .sv_imgact_try = NULL, 112 .sv_minsigstksz = MINSIGSTKSZ, 113 .sv_pagesize = IA32_PAGE_SIZE, 114 .sv_minuser = FREEBSD32_MINUSER, 115 .sv_maxuser = FREEBSD32_MAXUSER, 116 .sv_usrstack = FREEBSD32_USRSTACK, 117 .sv_psstrings = FREEBSD32_PS_STRINGS, 118 .sv_stackprot = VM_PROT_ALL, 119 .sv_copyout_strings = freebsd32_copyout_strings, 120 .sv_setregs = ia32_setregs, 121 .sv_fixlimit = ia32_fixlimit, 122 .sv_maxssiz = &ia32_maxssiz, 123 .sv_flags = 124 #ifdef __amd64__ 125 SV_SHP | SV_TIMEKEEP | 126 #endif 127 SV_ABI_FREEBSD | SV_IA32 | SV_ILP32, 128 .sv_set_syscall_retval = ia32_set_syscall_retval, 129 .sv_fetch_syscall_args = ia32_fetch_syscall_args, 130 .sv_syscallnames = freebsd32_syscallnames, 131 .sv_shared_page_base = FREEBSD32_SHAREDPAGE, 132 .sv_shared_page_len = PAGE_SIZE, 133 .sv_schedtail = NULL, 134 .sv_thread_detach = NULL, 135 .sv_trap = NULL, 136 }; 137 INIT_SYSENTVEC(elf_ia32_sysvec, &ia32_freebsd_sysvec); 138 139 static Elf32_Brandinfo ia32_brand_info = { 140 .brand = ELFOSABI_FREEBSD, 141 .machine = EM_386, 142 .compat_3_brand = "FreeBSD", 143 .emul_path = NULL, 144 .interp_path = "/libexec/ld-elf.so.1", 145 .sysvec = &ia32_freebsd_sysvec, 146 .interp_newpath = "/libexec/ld-elf32.so.1", 147 .brand_note = &elf32_freebsd_brandnote, 148 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 149 }; 150 151 SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_MIDDLE, 152 (sysinit_cfunc_t) elf32_insert_brand_entry, 153 &ia32_brand_info); 154 155 static Elf32_Brandinfo ia32_brand_oinfo = { 156 .brand = ELFOSABI_FREEBSD, 157 .machine = EM_386, 158 .compat_3_brand = "FreeBSD", 159 .emul_path = NULL, 160 .interp_path = "/usr/libexec/ld-elf.so.1", 161 .sysvec = &ia32_freebsd_sysvec, 162 .interp_newpath = "/libexec/ld-elf32.so.1", 163 .brand_note = &elf32_freebsd_brandnote, 164 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 165 }; 166 167 SYSINIT(oia32, SI_SUB_EXEC, SI_ORDER_ANY, 168 (sysinit_cfunc_t) elf32_insert_brand_entry, 169 &ia32_brand_oinfo); 170 171 static Elf32_Brandinfo kia32_brand_info = { 172 .brand = ELFOSABI_FREEBSD, 173 .machine = EM_386, 174 .compat_3_brand = "FreeBSD", 175 .emul_path = NULL, 176 .interp_path = "/lib/ld.so.1", 177 .sysvec = &ia32_freebsd_sysvec, 178 .brand_note = &elf32_kfreebsd_brandnote, 179 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY 180 }; 181 182 SYSINIT(kia32, SI_SUB_EXEC, SI_ORDER_ANY, 183 (sysinit_cfunc_t) elf32_insert_brand_entry, 184 &kia32_brand_info); 185 186 void 187 elf32_dump_thread(struct thread *td, void *dst, size_t *off) 188 { 189 void *buf; 190 size_t len; 191 192 len = 0; 193 if (use_xsave) { 194 if (dst != NULL) { 195 fpugetregs(td); 196 len += elf32_populate_note(NT_X86_XSTATE, 197 get_pcb_user_save_td(td), dst, 198 cpu_max_ext_state_size, &buf); 199 *(uint64_t *)((char *)buf + X86_XSTATE_XCR0_OFFSET) = 200 xsave_mask; 201 } else 202 len += elf32_populate_note(NT_X86_XSTATE, NULL, NULL, 203 cpu_max_ext_state_size, NULL); 204 } 205 *off = len; 206 } 207 208 void 209 ia32_fixlimit(struct rlimit *rl, int which) 210 { 211 212 switch (which) { 213 case RLIMIT_DATA: 214 if (ia32_maxdsiz != 0) { 215 if (rl->rlim_cur > ia32_maxdsiz) 216 rl->rlim_cur = ia32_maxdsiz; 217 if (rl->rlim_max > ia32_maxdsiz) 218 rl->rlim_max = ia32_maxdsiz; 219 } 220 break; 221 case RLIMIT_STACK: 222 if (ia32_maxssiz != 0) { 223 if (rl->rlim_cur > ia32_maxssiz) 224 rl->rlim_cur = ia32_maxssiz; 225 if (rl->rlim_max > ia32_maxssiz) 226 rl->rlim_max = ia32_maxssiz; 227 } 228 break; 229 case RLIMIT_VMEM: 230 if (ia32_maxvmem != 0) { 231 if (rl->rlim_cur > ia32_maxvmem) 232 rl->rlim_cur = ia32_maxvmem; 233 if (rl->rlim_max > ia32_maxvmem) 234 rl->rlim_max = ia32_maxvmem; 235 } 236 break; 237 } 238 } 239