ia32_sysvec.c revision 274817
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 274817 2014-11-21 20:53:17Z jhb $"); 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 77CTASSERT(sizeof(struct ia32_mcontext) == 640); 78CTASSERT(sizeof(struct ia32_ucontext) == 704); 79CTASSERT(sizeof(struct ia32_sigframe) == 800); 80CTASSERT(sizeof(struct siginfo32) == 64); 81#ifdef COMPAT_FREEBSD4 82CTASSERT(sizeof(struct ia32_mcontext4) == 260); 83CTASSERT(sizeof(struct ia32_ucontext4) == 324); 84CTASSERT(sizeof(struct ia32_sigframe4) == 408); 85#endif 86 87extern const char *freebsd32_syscallnames[]; 88 89static SYSCTL_NODE(_compat, OID_AUTO, ia32, CTLFLAG_RW, 0, "ia32 mode"); 90 91static u_long ia32_maxdsiz = IA32_MAXDSIZ; 92SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxdsiz, CTLFLAG_RWTUN, &ia32_maxdsiz, 0, ""); 93u_long ia32_maxssiz = IA32_MAXSSIZ; 94SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxssiz, CTLFLAG_RWTUN, &ia32_maxssiz, 0, ""); 95static u_long ia32_maxvmem = IA32_MAXVMEM; 96SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxvmem, CTLFLAG_RWTUN, &ia32_maxvmem, 0, ""); 97 98struct sysentvec ia32_freebsd_sysvec = { 99 .sv_size = FREEBSD32_SYS_MAXSYSCALL, 100 .sv_table = freebsd32_sysent, 101 .sv_mask = 0, 102 .sv_sigsize = 0, 103 .sv_sigtbl = NULL, 104 .sv_errsize = 0, 105 .sv_errtbl = NULL, 106 .sv_transtrap = NULL, 107 .sv_fixup = elf32_freebsd_fixup, 108 .sv_sendsig = ia32_sendsig, 109 .sv_sigcode = ia32_sigcode, 110 .sv_szsigcode = &sz_ia32_sigcode, 111 .sv_prepsyscall = NULL, 112 .sv_name = "FreeBSD ELF32", 113 .sv_coredump = elf32_coredump, 114 .sv_imgact_try = NULL, 115 .sv_minsigstksz = MINSIGSTKSZ, 116 .sv_pagesize = IA32_PAGE_SIZE, 117 .sv_minuser = FREEBSD32_MINUSER, 118 .sv_maxuser = FREEBSD32_MAXUSER, 119 .sv_usrstack = FREEBSD32_USRSTACK, 120 .sv_psstrings = FREEBSD32_PS_STRINGS, 121 .sv_stackprot = VM_PROT_ALL, 122 .sv_copyout_strings = freebsd32_copyout_strings, 123 .sv_setregs = ia32_setregs, 124 .sv_fixlimit = ia32_fixlimit, 125 .sv_maxssiz = &ia32_maxssiz, 126 .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32 | 127#ifdef __amd64__ 128 SV_SHP 129#else 130 0 131#endif 132 , 133 .sv_set_syscall_retval = ia32_set_syscall_retval, 134 .sv_fetch_syscall_args = ia32_fetch_syscall_args, 135 .sv_syscallnames = freebsd32_syscallnames, 136 .sv_shared_page_base = FREEBSD32_SHAREDPAGE, 137 .sv_shared_page_len = PAGE_SIZE, 138 .sv_schedtail = NULL, 139}; 140INIT_SYSENTVEC(elf_ia32_sysvec, &ia32_freebsd_sysvec); 141 142static Elf32_Brandinfo ia32_brand_info = { 143 .brand = ELFOSABI_FREEBSD, 144 .machine = EM_386, 145 .compat_3_brand = "FreeBSD", 146 .emul_path = NULL, 147 .interp_path = "/libexec/ld-elf.so.1", 148 .sysvec = &ia32_freebsd_sysvec, 149 .interp_newpath = "/libexec/ld-elf32.so.1", 150 .brand_note = &elf32_freebsd_brandnote, 151 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 152}; 153 154SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_MIDDLE, 155 (sysinit_cfunc_t) elf32_insert_brand_entry, 156 &ia32_brand_info); 157 158static Elf32_Brandinfo ia32_brand_oinfo = { 159 .brand = ELFOSABI_FREEBSD, 160 .machine = EM_386, 161 .compat_3_brand = "FreeBSD", 162 .emul_path = NULL, 163 .interp_path = "/usr/libexec/ld-elf.so.1", 164 .sysvec = &ia32_freebsd_sysvec, 165 .interp_newpath = "/libexec/ld-elf32.so.1", 166 .brand_note = &elf32_freebsd_brandnote, 167 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 168}; 169 170SYSINIT(oia32, SI_SUB_EXEC, SI_ORDER_ANY, 171 (sysinit_cfunc_t) elf32_insert_brand_entry, 172 &ia32_brand_oinfo); 173 174static Elf32_Brandinfo kia32_brand_info = { 175 .brand = ELFOSABI_FREEBSD, 176 .machine = EM_386, 177 .compat_3_brand = "FreeBSD", 178 .emul_path = NULL, 179 .interp_path = "/lib/ld.so.1", 180 .sysvec = &ia32_freebsd_sysvec, 181 .brand_note = &elf32_kfreebsd_brandnote, 182 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY 183}; 184 185SYSINIT(kia32, SI_SUB_EXEC, SI_ORDER_ANY, 186 (sysinit_cfunc_t) elf32_insert_brand_entry, 187 &kia32_brand_info); 188 189void 190elf32_dump_thread(struct thread *td, void *dst, size_t *off) 191{ 192 void *buf; 193 size_t len; 194 195 len = 0; 196 if (use_xsave) { 197 if (dst != NULL) { 198 fpugetregs(td); 199 len += elf32_populate_note(NT_X86_XSTATE, 200 get_pcb_user_save_td(td), dst, 201 cpu_max_ext_state_size, &buf); 202 *(uint64_t *)((char *)buf + X86_XSTATE_XCR0_OFFSET) = 203 xsave_mask; 204 } else 205 len += elf32_populate_note(NT_X86_XSTATE, NULL, NULL, 206 cpu_max_ext_state_size, NULL); 207 } 208 *off = len; 209} 210 211void 212ia32_fixlimit(struct rlimit *rl, int which) 213{ 214 215 switch (which) { 216 case RLIMIT_DATA: 217 if (ia32_maxdsiz != 0) { 218 if (rl->rlim_cur > ia32_maxdsiz) 219 rl->rlim_cur = ia32_maxdsiz; 220 if (rl->rlim_max > ia32_maxdsiz) 221 rl->rlim_max = ia32_maxdsiz; 222 } 223 break; 224 case RLIMIT_STACK: 225 if (ia32_maxssiz != 0) { 226 if (rl->rlim_cur > ia32_maxssiz) 227 rl->rlim_cur = ia32_maxssiz; 228 if (rl->rlim_max > ia32_maxssiz) 229 rl->rlim_max = ia32_maxssiz; 230 } 231 break; 232 case RLIMIT_VMEM: 233 if (ia32_maxvmem != 0) { 234 if (rl->rlim_cur > ia32_maxvmem) 235 rl->rlim_cur = ia32_maxvmem; 236 if (rl->rlim_max > ia32_maxvmem) 237 rl->rlim_max = ia32_maxvmem; 238 } 239 break; 240 } 241} 242