1 /*- 2 * Copyright (c) 2013 Dmitry Chagin 3 * Copyright (c) 2004 Tim J. Robbins 4 * Copyright (c) 2002 Doug Rabson 5 * Copyright (c) 2000 Marcel Moolenaar 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer 13 * in this position and unchanged. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/systm.h> 38 #include <sys/capsicum.h> 39 #include <sys/dirent.h> 40 #include <sys/file.h> 41 #include <sys/fcntl.h> 42 #include <sys/filedesc.h> 43 #include <sys/clock.h> 44 #include <sys/imgact.h> 45 #include <sys/ktr.h> 46 #include <sys/limits.h> 47 #include <sys/lock.h> 48 #include <sys/malloc.h> 49 #include <sys/mman.h> 50 #include <sys/mutex.h> 51 #include <sys/priv.h> 52 #include <sys/proc.h> 53 #include <sys/resource.h> 54 #include <sys/resourcevar.h> 55 #include <sys/sched.h> 56 #include <sys/syscallsubr.h> 57 #include <sys/sysproto.h> 58 #include <sys/vnode.h> 59 #include <sys/unistd.h> 60 #include <sys/wait.h> 61 62 #include <security/mac/mac_framework.h> 63 64 #include <ufs/ufs/extattr.h> 65 #include <ufs/ufs/quota.h> 66 #include <ufs/ufs/ufsmount.h> 67 68 #include <machine/frame.h> 69 #include <machine/md_var.h> 70 #include <machine/pcb.h> 71 #include <machine/psl.h> 72 #include <machine/segments.h> 73 #include <machine/specialreg.h> 74 75 #include <vm/vm.h> 76 #include <vm/pmap.h> 77 #include <vm/vm_extern.h> 78 #include <vm/vm_kern.h> 79 #include <vm/vm_map.h> 80 81 #include <amd64/linux/linux.h> 82 #include <amd64/linux/linux_proto.h> 83 #include <compat/linux/linux_ipc.h> 84 #include <compat/linux/linux_file.h> 85 #include <compat/linux/linux_misc.h> 86 #include <compat/linux/linux_mmap.h> 87 #include <compat/linux/linux_signal.h> 88 #include <compat/linux/linux_util.h> 89 #include <compat/linux/linux_emul.h> 90 91 92 int 93 linux_execve(struct thread *td, struct linux_execve_args *args) 94 { 95 struct image_args eargs; 96 char *path; 97 int error; 98 99 LCONVPATHEXIST(td, args->path, &path); 100 101 LINUX_CTR(execve); 102 103 error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, args->argp, 104 args->envp); 105 free(path, M_TEMP); 106 if (error == 0) 107 error = linux_common_execve(td, &eargs); 108 return (error); 109 } 110 111 int 112 linux_set_upcall_kse(struct thread *td, register_t stack) 113 { 114 115 if (stack) 116 td->td_frame->tf_rsp = stack; 117 118 /* 119 * The newly created Linux thread returns 120 * to the user space by the same path that a parent do. 121 */ 122 td->td_frame->tf_rax = 0; 123 return (0); 124 } 125 126 int 127 linux_mmap2(struct thread *td, struct linux_mmap2_args *args) 128 { 129 130 return (linux_mmap_common(td, PTROUT(args->addr), args->len, args->prot, 131 args->flags, args->fd, args->pgoff)); 132 } 133 134 int 135 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap) 136 { 137 138 return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot)); 139 } 140 141 int 142 linux_iopl(struct thread *td, struct linux_iopl_args *args) 143 { 144 int error; 145 146 LINUX_CTR(iopl); 147 148 if (args->level > 3) 149 return (EINVAL); 150 if ((error = priv_check(td, PRIV_IO)) != 0) 151 return (error); 152 if ((error = securelevel_gt(td->td_ucred, 0)) != 0) 153 return (error); 154 td->td_frame->tf_rflags = (td->td_frame->tf_rflags & ~PSL_IOPL) | 155 (args->level * (PSL_IOPL / 3)); 156 157 return (0); 158 } 159 160 int 161 linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap) 162 { 163 l_sigset_t lmask; 164 sigset_t sigmask; 165 int error; 166 167 LINUX_CTR2(rt_sigsuspend, "%p, %ld", 168 uap->newset, uap->sigsetsize); 169 170 if (uap->sigsetsize != sizeof(l_sigset_t)) 171 return (EINVAL); 172 173 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 174 if (error) 175 return (error); 176 177 linux_to_bsd_sigset(&lmask, &sigmask); 178 return (kern_sigsuspend(td, sigmask)); 179 } 180 181 int 182 linux_pause(struct thread *td, struct linux_pause_args *args) 183 { 184 struct proc *p = td->td_proc; 185 sigset_t sigmask; 186 187 LINUX_CTR(pause); 188 189 PROC_LOCK(p); 190 sigmask = td->td_sigmask; 191 PROC_UNLOCK(p); 192 return (kern_sigsuspend(td, sigmask)); 193 } 194 195 int 196 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 197 { 198 stack_t ss, oss; 199 l_stack_t lss; 200 int error; 201 202 LINUX_CTR2(sigaltstack, "%p, %p", uap->uss, uap->uoss); 203 204 if (uap->uss != NULL) { 205 error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 206 if (error) 207 return (error); 208 209 ss.ss_sp = PTRIN(lss.ss_sp); 210 ss.ss_size = lss.ss_size; 211 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 212 } 213 error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL, 214 (uap->uoss != NULL) ? &oss : NULL); 215 if (!error && uap->uoss != NULL) { 216 lss.ss_sp = PTROUT(oss.ss_sp); 217 lss.ss_size = oss.ss_size; 218 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); 219 error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 220 } 221 222 return (error); 223 } 224 225 int 226 linux_arch_prctl(struct thread *td, struct linux_arch_prctl_args *args) 227 { 228 int error; 229 struct pcb *pcb; 230 231 LINUX_CTR2(arch_prctl, "0x%x, %p", args->code, args->addr); 232 233 error = ENOTSUP; 234 pcb = td->td_pcb; 235 236 switch (args->code) { 237 case LINUX_ARCH_GET_GS: 238 error = copyout(&pcb->pcb_gsbase, (unsigned long *)args->addr, 239 sizeof(args->addr)); 240 break; 241 case LINUX_ARCH_SET_GS: 242 if (args->addr >= VM_MAXUSER_ADDRESS) 243 return(EPERM); 244 break; 245 case LINUX_ARCH_GET_FS: 246 error = copyout(&pcb->pcb_fsbase, (unsigned long *)args->addr, 247 sizeof(args->addr)); 248 break; 249 case LINUX_ARCH_SET_FS: 250 error = linux_set_cloned_tls(td, (void *)args->addr); 251 break; 252 default: 253 error = EINVAL; 254 } 255 return (error); 256 } 257 258 int 259 linux_set_cloned_tls(struct thread *td, void *desc) 260 { 261 struct pcb *pcb; 262 263 if ((uint64_t)desc >= VM_MAXUSER_ADDRESS) 264 return (EPERM); 265 266 pcb = td->td_pcb; 267 pcb->pcb_fsbase = (register_t)desc; 268 td->td_frame->tf_fs = _ufssel; 269 270 return (0); 271 } 272