ia32_sysvec.c revision 219405
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: head/sys/compat/ia32/ia32_sysvec.c 219405 2011-03-08 19:01:45Z dchagin $"); 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 86CTASSERT(sizeof(struct ia32_mcontext) == 640); 87CTASSERT(sizeof(struct ia32_ucontext) == 704); 88CTASSERT(sizeof(struct ia32_sigframe) == 800); 89CTASSERT(sizeof(struct siginfo32) == 64); 90#ifdef COMPAT_FREEBSD4 91CTASSERT(sizeof(struct ia32_mcontext4) == 260); 92CTASSERT(sizeof(struct ia32_ucontext4) == 324); 93CTASSERT(sizeof(struct ia32_sigframe4) == 408); 94#endif 95 96extern const char *freebsd32_syscallnames[]; 97 98static void ia32_fixlimit(struct rlimit *rl, int which); 99 100SYSCTL_NODE(_compat, OID_AUTO, ia32, CTLFLAG_RW, 0, "ia32 mode"); 101 102static u_long ia32_maxdsiz = IA32_MAXDSIZ; 103SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxdsiz, CTLFLAG_RW, &ia32_maxdsiz, 0, ""); 104TUNABLE_ULONG("compat.ia32.maxdsiz", &ia32_maxdsiz); 105static u_long ia32_maxssiz = IA32_MAXSSIZ; 106SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxssiz, CTLFLAG_RW, &ia32_maxssiz, 0, ""); 107TUNABLE_ULONG("compat.ia32.maxssiz", &ia32_maxssiz); 108static u_long ia32_maxvmem = IA32_MAXVMEM; 109SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxvmem, CTLFLAG_RW, &ia32_maxvmem, 0, ""); 110TUNABLE_ULONG("compat.ia32.maxvmem", &ia32_maxvmem); 111 112struct 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_MAXUSER, 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#ifdef __amd64__ 142 SV_SHP 143#else 144 0 145#endif 146 , 147 .sv_set_syscall_retval = ia32_set_syscall_retval, 148 .sv_fetch_syscall_args = ia32_fetch_syscall_args, 149 .sv_syscallnames = freebsd32_syscallnames, 150 .sv_shared_page_base = FREEBSD32_SHAREDPAGE, 151 .sv_shared_page_len = PAGE_SIZE, 152 .sv_schedtail = NULL, 153}; 154INIT_SYSENTVEC(elf_ia32_sysvec, &ia32_freebsd_sysvec); 155 156static Elf32_Brandinfo ia32_brand_info = { 157 .brand = ELFOSABI_FREEBSD, 158 .machine = EM_386, 159 .compat_3_brand = "FreeBSD", 160 .emul_path = NULL, 161 .interp_path = "/libexec/ld-elf.so.1", 162 .sysvec = &ia32_freebsd_sysvec, 163 .interp_newpath = "/libexec/ld-elf32.so.1", 164 .brand_note = &elf32_freebsd_brandnote, 165 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 166}; 167 168SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_MIDDLE, 169 (sysinit_cfunc_t) elf32_insert_brand_entry, 170 &ia32_brand_info); 171 172static Elf32_Brandinfo ia32_brand_oinfo = { 173 .brand = ELFOSABI_FREEBSD, 174 .machine = EM_386, 175 .compat_3_brand = "FreeBSD", 176 .emul_path = NULL, 177 .interp_path = "/usr/libexec/ld-elf.so.1", 178 .sysvec = &ia32_freebsd_sysvec, 179 .interp_newpath = "/libexec/ld-elf32.so.1", 180 .brand_note = &elf32_freebsd_brandnote, 181 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 182}; 183 184SYSINIT(oia32, SI_SUB_EXEC, SI_ORDER_ANY, 185 (sysinit_cfunc_t) elf32_insert_brand_entry, 186 &ia32_brand_oinfo); 187 188static Elf32_Brandinfo kia32_brand_info = { 189 .brand = ELFOSABI_FREEBSD, 190 .machine = EM_386, 191 .compat_3_brand = "FreeBSD", 192 .emul_path = NULL, 193 .interp_path = "/lib/ld.so.1", 194 .sysvec = &ia32_freebsd_sysvec, 195 .brand_note = &elf32_kfreebsd_brandnote, 196 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY 197}; 198 199SYSINIT(kia32, SI_SUB_EXEC, SI_ORDER_ANY, 200 (sysinit_cfunc_t) elf32_insert_brand_entry, 201 &kia32_brand_info); 202 203void 204elf32_dump_thread(struct thread *td __unused, void *dst __unused, 205 size_t *off __unused) 206{ 207} 208 209static void 210ia32_fixlimit(struct rlimit *rl, int which) 211{ 212 213 switch (which) { 214 case RLIMIT_DATA: 215 if (ia32_maxdsiz != 0) { 216 if (rl->rlim_cur > ia32_maxdsiz) 217 rl->rlim_cur = ia32_maxdsiz; 218 if (rl->rlim_max > ia32_maxdsiz) 219 rl->rlim_max = ia32_maxdsiz; 220 } 221 break; 222 case RLIMIT_STACK: 223 if (ia32_maxssiz != 0) { 224 if (rl->rlim_cur > ia32_maxssiz) 225 rl->rlim_cur = ia32_maxssiz; 226 if (rl->rlim_max > ia32_maxssiz) 227 rl->rlim_max = ia32_maxssiz; 228 } 229 break; 230 case RLIMIT_VMEM: 231 if (ia32_maxvmem != 0) { 232 if (rl->rlim_cur > ia32_maxvmem) 233 rl->rlim_cur = ia32_maxvmem; 234 if (rl->rlim_max > ia32_maxvmem) 235 rl->rlim_max = ia32_maxvmem; 236 } 237 break; 238 } 239} 240