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/capsicum.h> 37 #include <sys/clock.h> 38 #include <sys/dirent.h> 39 #include <sys/fcntl.h> 40 #include <sys/file.h> 41 #include <sys/filedesc.h> 42 #include <sys/imgact.h> 43 #include <sys/kernel.h> 44 #include <sys/ktr.h> 45 #include <sys/limits.h> 46 #include <sys/lock.h> 47 #include <sys/malloc.h> 48 #include <sys/mman.h> 49 #include <sys/mutex.h> 50 #include <sys/priv.h> 51 #include <sys/proc.h> 52 #include <sys/resource.h> 53 #include <sys/resourcevar.h> 54 #include <sys/sched.h> 55 #include <sys/syscallsubr.h> 56 #include <sys/sysproto.h> 57 #include <sys/systm.h> 58 #include <sys/unistd.h> 59 #include <sys/vnode.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/pmap.h> 76 #include <vm/vm.h> 77 #include <vm/vm_extern.h> 78 #include <vm/vm_kern.h> 79 #include <vm/vm_map.h> 80 81 #include <x86/ifunc.h> 82 #include <x86/sysarch.h> 83 84 #include <amd64/linux/linux.h> 85 #include <amd64/linux/linux_proto.h> 86 #include <compat/linux/linux_emul.h> 87 #include <compat/linux/linux_file.h> 88 #include <compat/linux/linux_ipc.h> 89 #include <compat/linux/linux_misc.h> 90 #include <compat/linux/linux_mmap.h> 91 #include <compat/linux/linux_signal.h> 92 #include <compat/linux/linux_util.h> 93 94 int 95 linux_execve(struct thread *td, struct linux_execve_args *args) 96 { 97 struct image_args eargs; 98 char *path; 99 int error; 100 101 LCONVPATHEXIST(td, args->path, &path); 102 103 LINUX_CTR(execve); 104 105 error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, args->argp, 106 args->envp); 107 free(path, M_TEMP); 108 if (error == 0) 109 error = linux_common_execve(td, &eargs); 110 return (error); 111 } 112 113 int 114 linux_set_upcall_kse(struct thread *td, register_t stack) 115 { 116 117 if (stack) 118 td->td_frame->tf_rsp = stack; 119 120 /* 121 * The newly created Linux thread returns 122 * to the user space by the same path that a parent do. 123 */ 124 td->td_frame->tf_rax = 0; 125 return (0); 126 } 127 128 int 129 linux_mmap2(struct thread *td, struct linux_mmap2_args *args) 130 { 131 132 return (linux_mmap_common(td, PTROUT(args->addr), args->len, args->prot, 133 args->flags, args->fd, args->pgoff)); 134 } 135 136 int 137 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap) 138 { 139 140 return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot)); 141 } 142 143 int 144 linux_iopl(struct thread *td, struct linux_iopl_args *args) 145 { 146 int error; 147 148 LINUX_CTR(iopl); 149 150 if (args->level > 3) 151 return (EINVAL); 152 if ((error = priv_check(td, PRIV_IO)) != 0) 153 return (error); 154 if ((error = securelevel_gt(td->td_ucred, 0)) != 0) 155 return (error); 156 td->td_frame->tf_rflags = (td->td_frame->tf_rflags & ~PSL_IOPL) | 157 (args->level * (PSL_IOPL / 3)); 158 159 return (0); 160 } 161 162 int 163 linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap) 164 { 165 l_sigset_t lmask; 166 sigset_t sigmask; 167 int error; 168 169 LINUX_CTR2(rt_sigsuspend, "%p, %ld", 170 uap->newset, uap->sigsetsize); 171 172 if (uap->sigsetsize != sizeof(l_sigset_t)) 173 return (EINVAL); 174 175 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 176 if (error) 177 return (error); 178 179 linux_to_bsd_sigset(&lmask, &sigmask); 180 return (kern_sigsuspend(td, sigmask)); 181 } 182 183 int 184 linux_pause(struct thread *td, struct linux_pause_args *args) 185 { 186 struct proc *p = td->td_proc; 187 sigset_t sigmask; 188 189 LINUX_CTR(pause); 190 191 PROC_LOCK(p); 192 sigmask = td->td_sigmask; 193 PROC_UNLOCK(p); 194 return (kern_sigsuspend(td, sigmask)); 195 } 196 197 int 198 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 199 { 200 stack_t ss, oss; 201 l_stack_t lss; 202 int error; 203 204 memset(&lss, 0, sizeof(lss)); 205 LINUX_CTR2(sigaltstack, "%p, %p", uap->uss, uap->uoss); 206 207 if (uap->uss != NULL) { 208 error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 209 if (error) 210 return (error); 211 212 ss.ss_sp = PTRIN(lss.ss_sp); 213 ss.ss_size = lss.ss_size; 214 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 215 } 216 error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL, 217 (uap->uoss != NULL) ? &oss : NULL); 218 if (!error && uap->uoss != NULL) { 219 lss.ss_sp = PTROUT(oss.ss_sp); 220 lss.ss_size = oss.ss_size; 221 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); 222 error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 223 } 224 225 return (error); 226 } 227 228 int 229 linux_arch_prctl(struct thread *td, struct linux_arch_prctl_args *args) 230 { 231 int error; 232 struct sysarch_args bsd_args; 233 234 LINUX_CTR2(arch_prctl, "0x%x, %p", args->code, args->addr); 235 236 switch (args->code) { 237 case LINUX_ARCH_SET_GS: 238 bsd_args.op = AMD64_SET_GSBASE; 239 bsd_args.parms = (void *)args->addr; 240 error = sysarch(td, &bsd_args); 241 if (error == EINVAL) 242 error = EPERM; 243 break; 244 case LINUX_ARCH_SET_FS: 245 bsd_args.op = AMD64_SET_FSBASE; 246 bsd_args.parms = (void *)args->addr; 247 error = sysarch(td, &bsd_args); 248 if (error == EINVAL) 249 error = EPERM; 250 break; 251 case LINUX_ARCH_GET_FS: 252 bsd_args.op = AMD64_GET_FSBASE; 253 bsd_args.parms = (void *)args->addr; 254 error = sysarch(td, &bsd_args); 255 break; 256 case LINUX_ARCH_GET_GS: 257 bsd_args.op = AMD64_GET_GSBASE; 258 bsd_args.parms = (void *)args->addr; 259 error = sysarch(td, &bsd_args); 260 break; 261 default: 262 error = EINVAL; 263 } 264 return (error); 265 } 266 267 int 268 linux_set_cloned_tls(struct thread *td, void *desc) 269 { 270 struct pcb *pcb; 271 272 if ((uint64_t)desc >= VM_MAXUSER_ADDRESS) 273 return (EPERM); 274 275 pcb = td->td_pcb; 276 pcb->pcb_fsbase = (register_t)desc; 277 td->td_frame->tf_fs = _ufssel; 278 279 return (0); 280 } 281 282 int futex_xchgl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 283 int futex_xchgl_smap(int oparg, uint32_t *uaddr, int *oldval); 284 DEFINE_IFUNC(, int, futex_xchgl, (int, uint32_t *, int *), static) 285 { 286 287 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 288 futex_xchgl_smap : futex_xchgl_nosmap); 289 } 290 291 int futex_addl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 292 int futex_addl_smap(int oparg, uint32_t *uaddr, int *oldval); 293 DEFINE_IFUNC(, int, futex_addl, (int, uint32_t *, int *), static) 294 { 295 296 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 297 futex_addl_smap : futex_addl_nosmap); 298 } 299 300 int futex_orl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 301 int futex_orl_smap(int oparg, uint32_t *uaddr, int *oldval); 302 DEFINE_IFUNC(, int, futex_orl, (int, uint32_t *, int *), static) 303 { 304 305 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 306 futex_orl_smap : futex_orl_nosmap); 307 } 308 309 int futex_andl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 310 int futex_andl_smap(int oparg, uint32_t *uaddr, int *oldval); 311 DEFINE_IFUNC(, int, futex_andl, (int, uint32_t *, int *), static) 312 { 313 314 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 315 futex_andl_smap : futex_andl_nosmap); 316 } 317 318 int futex_xorl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 319 int futex_xorl_smap(int oparg, uint32_t *uaddr, int *oldval); 320 DEFINE_IFUNC(, int, futex_xorl, (int, uint32_t *, int *), static) 321 { 322 323 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 324 futex_xorl_smap : futex_xorl_nosmap); 325 } 326