linux32_machdep.c revision 185438
1133819Stjr/*- 2133819Stjr * Copyright (c) 2004 Tim J. Robbins 3133819Stjr * Copyright (c) 2002 Doug Rabson 4133819Stjr * Copyright (c) 2000 Marcel Moolenaar 5133819Stjr * All rights reserved. 6133819Stjr * 7133819Stjr * Redistribution and use in source and binary forms, with or without 8133819Stjr * modification, are permitted provided that the following conditions 9133819Stjr * are met: 10133819Stjr * 1. Redistributions of source code must retain the above copyright 11133819Stjr * notice, this list of conditions and the following disclaimer 12133819Stjr * in this position and unchanged. 13133819Stjr * 2. Redistributions in binary form must reproduce the above copyright 14133819Stjr * notice, this list of conditions and the following disclaimer in the 15133819Stjr * documentation and/or other materials provided with the distribution. 16133819Stjr * 3. The name of the author may not be used to endorse or promote products 17133819Stjr * derived from this software without specific prior written permission. 18133819Stjr * 19133819Stjr * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20133819Stjr * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21133819Stjr * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22133819Stjr * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23133819Stjr * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24133819Stjr * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25133819Stjr * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26133819Stjr * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27133819Stjr * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28133819Stjr * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29133819Stjr */ 30133819Stjr 31133819Stjr#include <sys/cdefs.h> 32133819Stjr__FBSDID("$FreeBSD: head/sys/amd64/linux32/linux32_machdep.c 185438 2008-11-29 14:55:24Z kib $"); 33133819Stjr 34133819Stjr#include <sys/param.h> 35133819Stjr#include <sys/kernel.h> 36133819Stjr#include <sys/systm.h> 37165832Snetchild#include <sys/file.h> 38165832Snetchild#include <sys/fcntl.h> 39162954Sphk#include <sys/clock.h> 40142057Sjhb#include <sys/imgact.h> 41161310Snetchild#include <sys/limits.h> 42133819Stjr#include <sys/lock.h> 43133819Stjr#include <sys/malloc.h> 44133819Stjr#include <sys/mman.h> 45133819Stjr#include <sys/mutex.h> 46166729Sjkim#include <sys/priv.h> 47133819Stjr#include <sys/proc.h> 48133819Stjr#include <sys/resource.h> 49133819Stjr#include <sys/resourcevar.h> 50166188Sjeff#include <sys/sched.h> 51133819Stjr#include <sys/syscallsubr.h> 52133819Stjr#include <sys/sysproto.h> 53133819Stjr#include <sys/unistd.h> 54133819Stjr 55133819Stjr#include <machine/frame.h> 56168035Sjkim#include <machine/pcb.h> 57166729Sjkim#include <machine/psl.h> 58168035Sjkim#include <machine/segments.h> 59168035Sjkim#include <machine/specialreg.h> 60133819Stjr 61133819Stjr#include <vm/vm.h> 62133819Stjr#include <vm/pmap.h> 63142057Sjhb#include <vm/vm_extern.h> 64142057Sjhb#include <vm/vm_kern.h> 65133819Stjr#include <vm/vm_map.h> 66133819Stjr 67133819Stjr#include <amd64/linux32/linux.h> 68133819Stjr#include <amd64/linux32/linux32_proto.h> 69133819Stjr#include <compat/linux/linux_ipc.h> 70133819Stjr#include <compat/linux/linux_signal.h> 71133819Stjr#include <compat/linux/linux_util.h> 72161474Snetchild#include <compat/linux/linux_emul.h> 73133819Stjr 74133819Stjrstruct l_old_select_argv { 75133819Stjr l_int nfds; 76133819Stjr l_uintptr_t readfds; 77133819Stjr l_uintptr_t writefds; 78133819Stjr l_uintptr_t exceptfds; 79133819Stjr l_uintptr_t timeout; 80133819Stjr} __packed; 81133819Stjr 82133819Stjrint 83133819Stjrlinux_to_bsd_sigaltstack(int lsa) 84133819Stjr{ 85133819Stjr int bsa = 0; 86133819Stjr 87133819Stjr if (lsa & LINUX_SS_DISABLE) 88133819Stjr bsa |= SS_DISABLE; 89133819Stjr if (lsa & LINUX_SS_ONSTACK) 90133819Stjr bsa |= SS_ONSTACK; 91133819Stjr return (bsa); 92133819Stjr} 93133819Stjr 94133819Stjrint 95133819Stjrbsd_to_linux_sigaltstack(int bsa) 96133819Stjr{ 97133819Stjr int lsa = 0; 98133819Stjr 99133819Stjr if (bsa & SS_DISABLE) 100133819Stjr lsa |= LINUX_SS_DISABLE; 101133819Stjr if (bsa & SS_ONSTACK) 102133819Stjr lsa |= LINUX_SS_ONSTACK; 103133819Stjr return (lsa); 104133819Stjr} 105133819Stjr 106142057Sjhb/* 107142057Sjhb * Custom version of exec_copyin_args() so that we can translate 108142057Sjhb * the pointers. 109142057Sjhb */ 110142057Sjhbstatic int 111142057Sjhblinux_exec_copyin_args(struct image_args *args, char *fname, 112142057Sjhb enum uio_seg segflg, char **argv, char **envv) 113133819Stjr{ 114142057Sjhb char *argp, *envp; 115142057Sjhb u_int32_t *p32, arg; 116142057Sjhb size_t length; 117133819Stjr int error; 118133819Stjr 119142057Sjhb bzero(args, sizeof(*args)); 120142057Sjhb if (argv == NULL) 121142057Sjhb return (EFAULT); 122133819Stjr 123142057Sjhb /* 124142057Sjhb * Allocate temporary demand zeroed space for argument and 125142057Sjhb * environment strings 126142057Sjhb */ 127168063Sjkim args->buf = (char *)kmem_alloc_wait(exec_map, 128147588Sjhb PATH_MAX + ARG_MAX + MAXSHELLCMDLEN); 129142057Sjhb if (args->buf == NULL) 130142057Sjhb return (ENOMEM); 131142057Sjhb args->begin_argv = args->buf; 132142057Sjhb args->endp = args->begin_argv; 133142057Sjhb args->stringspace = ARG_MAX; 134133819Stjr 135142057Sjhb args->fname = args->buf + ARG_MAX; 136133819Stjr 137142057Sjhb /* 138142057Sjhb * Copy the file name. 139142057Sjhb */ 140142057Sjhb error = (segflg == UIO_SYSSPACE) ? 141142057Sjhb copystr(fname, args->fname, PATH_MAX, &length) : 142142057Sjhb copyinstr(fname, args->fname, PATH_MAX, &length); 143142057Sjhb if (error != 0) 144156440Sups goto err_exit; 145142057Sjhb 146142057Sjhb /* 147142057Sjhb * extract arguments first 148142057Sjhb */ 149142057Sjhb p32 = (u_int32_t *)argv; 150142057Sjhb for (;;) { 151142057Sjhb error = copyin(p32++, &arg, sizeof(arg)); 152142057Sjhb if (error) 153156440Sups goto err_exit; 154142057Sjhb if (arg == 0) 155142057Sjhb break; 156142057Sjhb argp = PTRIN(arg); 157142057Sjhb error = copyinstr(argp, args->endp, args->stringspace, &length); 158142057Sjhb if (error) { 159142057Sjhb if (error == ENAMETOOLONG) 160156440Sups error = E2BIG; 161168063Sjkim 162156440Sups goto err_exit; 163142057Sjhb } 164142057Sjhb args->stringspace -= length; 165142057Sjhb args->endp += length; 166142057Sjhb args->argc++; 167133819Stjr } 168168063Sjkim 169142057Sjhb args->begin_envv = args->endp; 170142057Sjhb 171142057Sjhb /* 172142057Sjhb * extract environment strings 173142057Sjhb */ 174142057Sjhb if (envv) { 175142057Sjhb p32 = (u_int32_t *)envv; 176142057Sjhb for (;;) { 177133819Stjr error = copyin(p32++, &arg, sizeof(arg)); 178133819Stjr if (error) 179156440Sups goto err_exit; 180142057Sjhb if (arg == 0) 181142057Sjhb break; 182142057Sjhb envp = PTRIN(arg); 183142057Sjhb error = copyinstr(envp, args->endp, args->stringspace, 184142057Sjhb &length); 185142057Sjhb if (error) { 186142057Sjhb if (error == ENAMETOOLONG) 187156440Sups error = E2BIG; 188156440Sups goto err_exit; 189142057Sjhb } 190142057Sjhb args->stringspace -= length; 191142057Sjhb args->endp += length; 192142057Sjhb args->envc++; 193142057Sjhb } 194133819Stjr } 195133819Stjr 196142057Sjhb return (0); 197156440Sups 198156440Supserr_exit: 199156440Sups kmem_free_wakeup(exec_map, (vm_offset_t)args->buf, 200156440Sups PATH_MAX + ARG_MAX + MAXSHELLCMDLEN); 201156440Sups args->buf = NULL; 202156440Sups return (error); 203133819Stjr} 204133819Stjr 205142057Sjhbint 206142057Sjhblinux_execve(struct thread *td, struct linux_execve_args *args) 207142057Sjhb{ 208142057Sjhb struct image_args eargs; 209142057Sjhb char *path; 210142057Sjhb int error; 211142057Sjhb 212142057Sjhb LCONVPATHEXIST(td, args->path, &path); 213142057Sjhb 214142057Sjhb#ifdef DEBUG 215142057Sjhb if (ldebug(execve)) 216142057Sjhb printf(ARGS(execve, "%s"), path); 217142057Sjhb#endif 218142057Sjhb 219142057Sjhb error = linux_exec_copyin_args(&eargs, path, UIO_SYSSPACE, args->argp, 220142057Sjhb args->envp); 221142057Sjhb free(path, M_TEMP); 222142057Sjhb if (error == 0) 223142057Sjhb error = kern_execve(td, &eargs, NULL); 224161474Snetchild if (error == 0) 225168063Sjkim /* Linux process can execute FreeBSD one, do not attempt 226161474Snetchild * to create emuldata for such process using 227161474Snetchild * linux_proc_init, this leads to a panic on KASSERT 228168063Sjkim * because such process has p->p_emuldata == NULL. 229161474Snetchild */ 230161474Snetchild if (td->td_proc->p_sysent == &elf_linux_sysvec) 231168063Sjkim error = linux_proc_init(td, 0, 0); 232142057Sjhb return (error); 233142057Sjhb} 234142057Sjhb 235185438SkibCTASSERT(sizeof(struct l_iovec32) == 8); 236133819Stjr 237144449Sjhbstatic int 238185438Skiblinux32_copyinuio(struct l_iovec32 *iovp, l_ulong iovcnt, struct uio **uiop) 239133819Stjr{ 240185438Skib struct l_iovec32 iov32; 241144449Sjhb struct iovec *iov; 242144449Sjhb struct uio *uio; 243185438Skib uint32_t iovlen; 244144449Sjhb int error, i; 245133819Stjr 246144449Sjhb *uiop = NULL; 247144449Sjhb if (iovcnt > UIO_MAXIOV) 248133819Stjr return (EINVAL); 249144449Sjhb iovlen = iovcnt * sizeof(struct iovec); 250168844Sjkim uio = malloc(iovlen + sizeof(*uio), M_IOV, M_WAITOK); 251144449Sjhb iov = (struct iovec *)(uio + 1); 252144449Sjhb for (i = 0; i < iovcnt; i++) { 253185438Skib error = copyin(&iovp[i], &iov32, sizeof(struct l_iovec32)); 254144449Sjhb if (error) { 255144449Sjhb free(uio, M_IOV); 256144449Sjhb return (error); 257144449Sjhb } 258144449Sjhb iov[i].iov_base = PTRIN(iov32.iov_base); 259144449Sjhb iov[i].iov_len = iov32.iov_len; 260133819Stjr } 261144449Sjhb uio->uio_iov = iov; 262144449Sjhb uio->uio_iovcnt = iovcnt; 263144449Sjhb uio->uio_segflg = UIO_USERSPACE; 264144449Sjhb uio->uio_offset = -1; 265144449Sjhb uio->uio_resid = 0; 266144449Sjhb for (i = 0; i < iovcnt; i++) { 267144449Sjhb if (iov->iov_len > INT_MAX - uio->uio_resid) { 268144449Sjhb free(uio, M_IOV); 269144449Sjhb return (EINVAL); 270144449Sjhb } 271144449Sjhb uio->uio_resid += iov->iov_len; 272144449Sjhb iov++; 273144449Sjhb } 274144449Sjhb *uiop = uio; 275144449Sjhb return (0); 276144449Sjhb} 277133819Stjr 278144449Sjhbint 279185438Skiblinux32_copyiniov(struct l_iovec32 *iovp32, l_ulong iovcnt, struct iovec **iovp, 280185438Skib int error) 281185438Skib{ 282185438Skib struct l_iovec32 iov32; 283185438Skib struct iovec *iov; 284185438Skib uint32_t iovlen; 285185438Skib int i; 286185438Skib 287185438Skib *iovp = NULL; 288185438Skib if (iovcnt > UIO_MAXIOV) 289185438Skib return (error); 290185438Skib iovlen = iovcnt * sizeof(struct iovec); 291185438Skib iov = malloc(iovlen, M_IOV, M_WAITOK); 292185438Skib for (i = 0; i < iovcnt; i++) { 293185438Skib error = copyin(&iovp32[i], &iov32, sizeof(struct l_iovec32)); 294185438Skib if (error) { 295185438Skib free(iov, M_IOV); 296185438Skib return (error); 297185438Skib } 298185438Skib iov[i].iov_base = PTRIN(iov32.iov_base); 299185438Skib iov[i].iov_len = iov32.iov_len; 300185438Skib } 301185438Skib *iovp = iov; 302185438Skib return(0); 303185438Skib 304185438Skib} 305185438Skib 306185438Skibint 307144449Sjhblinux_readv(struct thread *td, struct linux_readv_args *uap) 308144449Sjhb{ 309144449Sjhb struct uio *auio; 310144449Sjhb int error; 311133819Stjr 312144449Sjhb error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio); 313144449Sjhb if (error) 314144449Sjhb return (error); 315144449Sjhb error = kern_readv(td, uap->fd, auio); 316144449Sjhb free(auio, M_IOV); 317133819Stjr return (error); 318133819Stjr} 319133819Stjr 320133819Stjrint 321133819Stjrlinux_writev(struct thread *td, struct linux_writev_args *uap) 322133819Stjr{ 323144449Sjhb struct uio *auio; 324144449Sjhb int error; 325133819Stjr 326144449Sjhb error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio); 327144449Sjhb if (error) 328144449Sjhb return (error); 329144449Sjhb error = kern_writev(td, uap->fd, auio); 330144449Sjhb free(auio, M_IOV); 331133819Stjr return (error); 332133819Stjr} 333133819Stjr 334133819Stjrstruct l_ipc_kludge { 335133819Stjr l_uintptr_t msgp; 336133819Stjr l_long msgtyp; 337133819Stjr} __packed; 338133819Stjr 339133819Stjrint 340133819Stjrlinux_ipc(struct thread *td, struct linux_ipc_args *args) 341133819Stjr{ 342133819Stjr 343133819Stjr switch (args->what & 0xFFFF) { 344133819Stjr case LINUX_SEMOP: { 345133819Stjr struct linux_semop_args a; 346133819Stjr 347133819Stjr a.semid = args->arg1; 348133819Stjr a.tsops = args->ptr; 349133819Stjr a.nsops = args->arg2; 350133819Stjr return (linux_semop(td, &a)); 351133819Stjr } 352133819Stjr case LINUX_SEMGET: { 353133819Stjr struct linux_semget_args a; 354133819Stjr 355133819Stjr a.key = args->arg1; 356133819Stjr a.nsems = args->arg2; 357133819Stjr a.semflg = args->arg3; 358133819Stjr return (linux_semget(td, &a)); 359133819Stjr } 360133819Stjr case LINUX_SEMCTL: { 361133819Stjr struct linux_semctl_args a; 362133819Stjr int error; 363133819Stjr 364133819Stjr a.semid = args->arg1; 365133819Stjr a.semnum = args->arg2; 366133819Stjr a.cmd = args->arg3; 367133819Stjr error = copyin(args->ptr, &a.arg, sizeof(a.arg)); 368133819Stjr if (error) 369133819Stjr return (error); 370133819Stjr return (linux_semctl(td, &a)); 371133819Stjr } 372133819Stjr case LINUX_MSGSND: { 373133819Stjr struct linux_msgsnd_args a; 374133819Stjr 375133819Stjr a.msqid = args->arg1; 376133819Stjr a.msgp = args->ptr; 377133819Stjr a.msgsz = args->arg2; 378133819Stjr a.msgflg = args->arg3; 379133819Stjr return (linux_msgsnd(td, &a)); 380133819Stjr } 381133819Stjr case LINUX_MSGRCV: { 382133819Stjr struct linux_msgrcv_args a; 383133819Stjr 384133819Stjr a.msqid = args->arg1; 385133819Stjr a.msgsz = args->arg2; 386133819Stjr a.msgflg = args->arg3; 387133819Stjr if ((args->what >> 16) == 0) { 388133819Stjr struct l_ipc_kludge tmp; 389133819Stjr int error; 390133819Stjr 391133819Stjr if (args->ptr == 0) 392133819Stjr return (EINVAL); 393133819Stjr error = copyin(args->ptr, &tmp, sizeof(tmp)); 394133819Stjr if (error) 395133819Stjr return (error); 396133819Stjr a.msgp = PTRIN(tmp.msgp); 397133819Stjr a.msgtyp = tmp.msgtyp; 398133819Stjr } else { 399133819Stjr a.msgp = args->ptr; 400133819Stjr a.msgtyp = args->arg5; 401133819Stjr } 402133819Stjr return (linux_msgrcv(td, &a)); 403133819Stjr } 404133819Stjr case LINUX_MSGGET: { 405133819Stjr struct linux_msgget_args a; 406133819Stjr 407133819Stjr a.key = args->arg1; 408133819Stjr a.msgflg = args->arg2; 409133819Stjr return (linux_msgget(td, &a)); 410133819Stjr } 411133819Stjr case LINUX_MSGCTL: { 412133819Stjr struct linux_msgctl_args a; 413133819Stjr 414133819Stjr a.msqid = args->arg1; 415133819Stjr a.cmd = args->arg2; 416133819Stjr a.buf = args->ptr; 417133819Stjr return (linux_msgctl(td, &a)); 418133819Stjr } 419133819Stjr case LINUX_SHMAT: { 420133819Stjr struct linux_shmat_args a; 421133819Stjr 422133819Stjr a.shmid = args->arg1; 423133819Stjr a.shmaddr = args->ptr; 424133819Stjr a.shmflg = args->arg2; 425144441Sjhb a.raddr = PTRIN((l_uint)args->arg3); 426133819Stjr return (linux_shmat(td, &a)); 427133819Stjr } 428133819Stjr case LINUX_SHMDT: { 429133819Stjr struct linux_shmdt_args a; 430133819Stjr 431133819Stjr a.shmaddr = args->ptr; 432133819Stjr return (linux_shmdt(td, &a)); 433133819Stjr } 434133819Stjr case LINUX_SHMGET: { 435133819Stjr struct linux_shmget_args a; 436133819Stjr 437133819Stjr a.key = args->arg1; 438133819Stjr a.size = args->arg2; 439133819Stjr a.shmflg = args->arg3; 440133819Stjr return (linux_shmget(td, &a)); 441133819Stjr } 442133819Stjr case LINUX_SHMCTL: { 443133819Stjr struct linux_shmctl_args a; 444133819Stjr 445133819Stjr a.shmid = args->arg1; 446133819Stjr a.cmd = args->arg2; 447133819Stjr a.buf = args->ptr; 448133819Stjr return (linux_shmctl(td, &a)); 449133819Stjr } 450133819Stjr default: 451133819Stjr break; 452133819Stjr } 453133819Stjr 454133819Stjr return (EINVAL); 455133819Stjr} 456133819Stjr 457133819Stjrint 458133819Stjrlinux_old_select(struct thread *td, struct linux_old_select_args *args) 459133819Stjr{ 460133819Stjr struct l_old_select_argv linux_args; 461133819Stjr struct linux_select_args newsel; 462133819Stjr int error; 463133819Stjr 464133819Stjr#ifdef DEBUG 465133819Stjr if (ldebug(old_select)) 466133819Stjr printf(ARGS(old_select, "%p"), args->ptr); 467133819Stjr#endif 468133819Stjr 469133819Stjr error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 470133819Stjr if (error) 471133819Stjr return (error); 472133819Stjr 473133819Stjr newsel.nfds = linux_args.nfds; 474133819Stjr newsel.readfds = PTRIN(linux_args.readfds); 475133819Stjr newsel.writefds = PTRIN(linux_args.writefds); 476133819Stjr newsel.exceptfds = PTRIN(linux_args.exceptfds); 477133819Stjr newsel.timeout = PTRIN(linux_args.timeout); 478133819Stjr return (linux_select(td, &newsel)); 479133819Stjr} 480133819Stjr 481133819Stjrint 482133819Stjrlinux_fork(struct thread *td, struct linux_fork_args *args) 483133819Stjr{ 484133819Stjr int error; 485166150Snetchild struct proc *p2; 486166150Snetchild struct thread *td2; 487133819Stjr 488133819Stjr#ifdef DEBUG 489133819Stjr if (ldebug(fork)) 490133819Stjr printf(ARGS(fork, "")); 491133819Stjr#endif 492133819Stjr 493166150Snetchild if ((error = fork1(td, RFFDG | RFPROC | RFSTOPPED, 0, &p2)) != 0) 494133819Stjr return (error); 495168063Sjkim 496166150Snetchild if (error == 0) { 497166150Snetchild td->td_retval[0] = p2->p_pid; 498166150Snetchild td->td_retval[1] = 0; 499166150Snetchild } 500133819Stjr 501133819Stjr if (td->td_retval[1] == 1) 502133819Stjr td->td_retval[0] = 0; 503161474Snetchild error = linux_proc_init(td, td->td_retval[0], 0); 504161474Snetchild if (error) 505161474Snetchild return (error); 506161474Snetchild 507166150Snetchild td2 = FIRST_THREAD_IN_PROC(p2); 508166150Snetchild 509168063Sjkim /* 510168063Sjkim * Make this runnable after we are finished with it. 511168063Sjkim */ 512170307Sjeff thread_lock(td2); 513166150Snetchild TD_SET_CAN_RUN(td2); 514166188Sjeff sched_add(td2, SRQ_BORING); 515170307Sjeff thread_unlock(td2); 516166150Snetchild 517133819Stjr return (0); 518133819Stjr} 519133819Stjr 520133819Stjrint 521133819Stjrlinux_vfork(struct thread *td, struct linux_vfork_args *args) 522133819Stjr{ 523133819Stjr int error; 524161611Snetchild struct proc *p2; 525166150Snetchild struct thread *td2; 526133819Stjr 527133819Stjr#ifdef DEBUG 528133819Stjr if (ldebug(vfork)) 529133819Stjr printf(ARGS(vfork, "")); 530133819Stjr#endif 531133819Stjr 532168063Sjkim /* Exclude RFPPWAIT */ 533166150Snetchild if ((error = fork1(td, RFFDG | RFPROC | RFMEM | RFSTOPPED, 0, &p2)) != 0) 534133819Stjr return (error); 535161611Snetchild if (error == 0) { 536161611Snetchild td->td_retval[0] = p2->p_pid; 537161611Snetchild td->td_retval[1] = 0; 538161611Snetchild } 539133819Stjr /* Are we the child? */ 540133819Stjr if (td->td_retval[1] == 1) 541133819Stjr td->td_retval[0] = 0; 542161474Snetchild error = linux_proc_init(td, td->td_retval[0], 0); 543161474Snetchild if (error) 544161474Snetchild return (error); 545166150Snetchild 546166150Snetchild PROC_LOCK(p2); 547166150Snetchild p2->p_flag |= P_PPWAIT; 548166150Snetchild PROC_UNLOCK(p2); 549166150Snetchild 550166150Snetchild td2 = FIRST_THREAD_IN_PROC(p2); 551168063Sjkim 552168848Sjkim /* 553168848Sjkim * Make this runnable after we are finished with it. 554168848Sjkim */ 555170307Sjeff thread_lock(td2); 556166150Snetchild TD_SET_CAN_RUN(td2); 557166188Sjeff sched_add(td2, SRQ_BORING); 558170307Sjeff thread_unlock(td2); 559166150Snetchild 560161611Snetchild /* wait for the children to exit, ie. emulate vfork */ 561161611Snetchild PROC_LOCK(p2); 562161611Snetchild while (p2->p_flag & P_PPWAIT) 563161611Snetchild msleep(td->td_proc, &p2->p_mtx, PWAIT, "ppwait", 0); 564161611Snetchild PROC_UNLOCK(p2); 565168063Sjkim 566133819Stjr return (0); 567133819Stjr} 568133819Stjr 569133819Stjrint 570133819Stjrlinux_clone(struct thread *td, struct linux_clone_args *args) 571133819Stjr{ 572133819Stjr int error, ff = RFPROC | RFSTOPPED; 573133819Stjr struct proc *p2; 574133819Stjr struct thread *td2; 575133819Stjr int exit_signal; 576161474Snetchild struct linux_emuldata *em; 577133819Stjr 578133819Stjr#ifdef DEBUG 579133819Stjr if (ldebug(clone)) { 580168063Sjkim printf(ARGS(clone, "flags %x, stack %p, parent tid: %p, " 581168063Sjkim "child tid: %p"), (unsigned)args->flags, 582168063Sjkim args->stack, args->parent_tidptr, args->child_tidptr); 583133819Stjr } 584133819Stjr#endif 585133819Stjr 586133819Stjr exit_signal = args->flags & 0x000000ff; 587169458Skan if (LINUX_SIG_VALID(exit_signal)) { 588169458Skan if (exit_signal <= LINUX_SIGTBLSZ) 589169458Skan exit_signal = 590169458Skan linux_to_bsd_signal[_SIG_IDX(exit_signal)]; 591169458Skan } else if (exit_signal != 0) 592133819Stjr return (EINVAL); 593133819Stjr 594167157Sjkim if (args->flags & LINUX_CLONE_VM) 595133819Stjr ff |= RFMEM; 596167157Sjkim if (args->flags & LINUX_CLONE_SIGHAND) 597133819Stjr ff |= RFSIGSHARE; 598168063Sjkim /* 599168063Sjkim * XXX: In Linux, sharing of fs info (chroot/cwd/umask) 600168063Sjkim * and open files is independant. In FreeBSD, its in one 601168848Sjkim * structure but in reality it does not cause any problems 602168848Sjkim * because both of these flags are usually set together. 603163371Snetchild */ 604167157Sjkim if (!(args->flags & (LINUX_CLONE_FILES | LINUX_CLONE_FS))) 605133819Stjr ff |= RFFDG; 606133819Stjr 607161474Snetchild /* 608161474Snetchild * Attempt to detect when linux_clone(2) is used for creating 609161474Snetchild * kernel threads. Unfortunately despite the existence of the 610161474Snetchild * CLONE_THREAD flag, version of linuxthreads package used in 611161474Snetchild * most popular distros as of beginning of 2005 doesn't make 612166944Snetchild * any use of it. Therefore, this detection relies on 613161474Snetchild * empirical observation that linuxthreads sets certain 614161474Snetchild * combination of flags, so that we can make more or less 615161474Snetchild * precise detection and notify the FreeBSD kernel that several 616161474Snetchild * processes are in fact part of the same threading group, so 617161474Snetchild * that special treatment is necessary for signal delivery 618161474Snetchild * between those processes and fd locking. 619161474Snetchild */ 620167157Sjkim if ((args->flags & 0xffffff00) == LINUX_THREADING_FLAGS) 621161474Snetchild ff |= RFTHREAD; 622161474Snetchild 623168056Sjkim if (args->flags & LINUX_CLONE_PARENT_SETTID) 624168056Sjkim if (args->parent_tidptr == NULL) 625168056Sjkim return (EINVAL); 626168056Sjkim 627133819Stjr error = fork1(td, ff, 0, &p2); 628133819Stjr if (error) 629133819Stjr return (error); 630166395Skib 631167157Sjkim if (args->flags & (LINUX_CLONE_PARENT | LINUX_CLONE_THREAD)) { 632166395Skib sx_xlock(&proctree_lock); 633166395Skib PROC_LOCK(p2); 634166395Skib proc_reparent(p2, td->td_proc->p_pptr); 635166395Skib PROC_UNLOCK(p2); 636166395Skib sx_xunlock(&proctree_lock); 637166395Skib } 638168063Sjkim 639161474Snetchild /* create the emuldata */ 640161474Snetchild error = linux_proc_init(td, p2->p_pid, args->flags); 641161474Snetchild /* reference it - no need to check this */ 642165867Snetchild em = em_find(p2, EMUL_DOLOCK); 643161474Snetchild KASSERT(em != NULL, ("clone: emuldata not found.\n")); 644161474Snetchild /* and adjust it */ 645133819Stjr 646167157Sjkim if (args->flags & LINUX_CLONE_THREAD) { 647161474Snetchild#ifdef notyet 648161696Snetchild PROC_LOCK(p2); 649161474Snetchild p2->p_pgrp = td->td_proc->p_pgrp; 650161696Snetchild PROC_UNLOCK(p2); 651161474Snetchild#endif 652168063Sjkim exit_signal = 0; 653161474Snetchild } 654161474Snetchild 655167157Sjkim if (args->flags & LINUX_CLONE_CHILD_SETTID) 656161474Snetchild em->child_set_tid = args->child_tidptr; 657161474Snetchild else 658161474Snetchild em->child_set_tid = NULL; 659161474Snetchild 660167157Sjkim if (args->flags & LINUX_CLONE_CHILD_CLEARTID) 661161474Snetchild em->child_clear_tid = args->child_tidptr; 662161474Snetchild else 663161474Snetchild em->child_clear_tid = NULL; 664161696Snetchild 665161474Snetchild EMUL_UNLOCK(&emul_lock); 666161474Snetchild 667168056Sjkim if (args->flags & LINUX_CLONE_PARENT_SETTID) { 668168056Sjkim error = copyout(&p2->p_pid, args->parent_tidptr, 669168056Sjkim sizeof(p2->p_pid)); 670168056Sjkim if (error) 671168056Sjkim printf(LMSG("copyout failed!")); 672168056Sjkim } 673168056Sjkim 674133819Stjr PROC_LOCK(p2); 675133819Stjr p2->p_sigparent = exit_signal; 676133819Stjr PROC_UNLOCK(p2); 677133819Stjr td2 = FIRST_THREAD_IN_PROC(p2); 678168063Sjkim /* 679168063Sjkim * In a case of stack = NULL, we are supposed to COW calling process 680168063Sjkim * stack. This is what normal fork() does, so we just keep tf_rsp arg 681168063Sjkim * intact. 682161310Snetchild */ 683161310Snetchild if (args->stack) 684168063Sjkim td2->td_frame->tf_rsp = PTROUT(args->stack); 685133819Stjr 686167157Sjkim if (args->flags & LINUX_CLONE_SETTLS) { 687168035Sjkim struct user_segment_descriptor sd; 688168035Sjkim struct l_user_desc info; 689168848Sjkim int a[2]; 690168035Sjkim 691168848Sjkim error = copyin((void *)td->td_frame->tf_rsi, &info, 692168035Sjkim sizeof(struct l_user_desc)); 693168035Sjkim if (error) { 694168035Sjkim printf(LMSG("copyin failed!")); 695168035Sjkim } else { 696168035Sjkim /* We might copy out the entry_number as GUGS32_SEL. */ 697168848Sjkim info.entry_number = GUGS32_SEL; 698168035Sjkim error = copyout(&info, (void *)td->td_frame->tf_rsi, 699168035Sjkim sizeof(struct l_user_desc)); 700168035Sjkim if (error) 701168035Sjkim printf(LMSG("copyout failed!")); 702168035Sjkim 703168035Sjkim a[0] = LINUX_LDT_entry_a(&info); 704168035Sjkim a[1] = LINUX_LDT_entry_b(&info); 705168035Sjkim 706168035Sjkim memcpy(&sd, &a, sizeof(a)); 707168035Sjkim#ifdef DEBUG 708168035Sjkim if (ldebug(clone)) 709168035Sjkim printf("Segment created in clone with " 710168035Sjkim "CLONE_SETTLS: lobase: %x, hibase: %x, " 711168035Sjkim "lolimit: %x, hilimit: %x, type: %i, " 712168035Sjkim "dpl: %i, p: %i, xx: %i, long: %i, " 713168035Sjkim "def32: %i, gran: %i\n", sd.sd_lobase, 714168035Sjkim sd.sd_hibase, sd.sd_lolimit, sd.sd_hilimit, 715168035Sjkim sd.sd_type, sd.sd_dpl, sd.sd_p, sd.sd_xx, 716168035Sjkim sd.sd_long, sd.sd_def32, sd.sd_gran); 717168035Sjkim#endif 718168035Sjkim td2->td_pcb->pcb_gsbase = (register_t)info.base_addr; 719168035Sjkim td2->td_pcb->pcb_gs32sd = sd; 720168035Sjkim td2->td_pcb->pcb_gs = GSEL(GUGS32_SEL, SEL_UPL); 721180992Skib td2->td_pcb->pcb_flags |= PCB_GS32BIT | PCB_32BIT; 722168035Sjkim } 723161474Snetchild } 724161474Snetchild 725133819Stjr#ifdef DEBUG 726133819Stjr if (ldebug(clone)) 727168063Sjkim printf(LMSG("clone: successful rfork to %d, " 728168063Sjkim "stack %p sig = %d"), (int)p2->p_pid, args->stack, 729168063Sjkim exit_signal); 730133819Stjr#endif 731167157Sjkim if (args->flags & LINUX_CLONE_VFORK) { 732166150Snetchild PROC_LOCK(p2); 733166150Snetchild p2->p_flag |= P_PPWAIT; 734166150Snetchild PROC_UNLOCK(p2); 735166150Snetchild } 736133819Stjr 737133819Stjr /* 738133819Stjr * Make this runnable after we are finished with it. 739133819Stjr */ 740170307Sjeff thread_lock(td2); 741133819Stjr TD_SET_CAN_RUN(td2); 742166188Sjeff sched_add(td2, SRQ_BORING); 743170307Sjeff thread_unlock(td2); 744133819Stjr 745133819Stjr td->td_retval[0] = p2->p_pid; 746133819Stjr td->td_retval[1] = 0; 747168063Sjkim 748167157Sjkim if (args->flags & LINUX_CLONE_VFORK) { 749168063Sjkim /* wait for the children to exit, ie. emulate vfork */ 750168063Sjkim PROC_LOCK(p2); 751163374Snetchild while (p2->p_flag & P_PPWAIT) 752168063Sjkim msleep(td->td_proc, &p2->p_mtx, PWAIT, "ppwait", 0); 753163374Snetchild PROC_UNLOCK(p2); 754163374Snetchild } 755163374Snetchild 756133819Stjr return (0); 757133819Stjr} 758133819Stjr 759133819Stjr#define STACK_SIZE (2 * 1024 * 1024) 760133819Stjr#define GUARD_SIZE (4 * PAGE_SIZE) 761133819Stjr 762133819Stjrstatic int linux_mmap_common(struct thread *, struct l_mmap_argv *); 763133819Stjr 764133819Stjrint 765133819Stjrlinux_mmap2(struct thread *td, struct linux_mmap2_args *args) 766133819Stjr{ 767133819Stjr struct l_mmap_argv linux_args; 768133819Stjr 769133819Stjr#ifdef DEBUG 770133819Stjr if (ldebug(mmap2)) 771168063Sjkim printf(ARGS(mmap2, "0x%08x, %d, %d, 0x%08x, %d, %d"), 772168063Sjkim args->addr, args->len, args->prot, 773133819Stjr args->flags, args->fd, args->pgoff); 774133819Stjr#endif 775133819Stjr 776133819Stjr linux_args.addr = PTROUT(args->addr); 777133819Stjr linux_args.len = args->len; 778133819Stjr linux_args.prot = args->prot; 779133819Stjr linux_args.flags = args->flags; 780133819Stjr linux_args.fd = args->fd; 781144441Sjhb linux_args.pgoff = args->pgoff; 782133819Stjr 783133819Stjr return (linux_mmap_common(td, &linux_args)); 784133819Stjr} 785133819Stjr 786133819Stjrint 787133819Stjrlinux_mmap(struct thread *td, struct linux_mmap_args *args) 788133819Stjr{ 789133819Stjr int error; 790133819Stjr struct l_mmap_argv linux_args; 791133819Stjr 792133819Stjr error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 793133819Stjr if (error) 794133819Stjr return (error); 795133819Stjr 796133819Stjr#ifdef DEBUG 797133819Stjr if (ldebug(mmap)) 798168063Sjkim printf(ARGS(mmap, "0x%08x, %d, %d, 0x%08x, %d, %d"), 799168063Sjkim linux_args.addr, linux_args.len, linux_args.prot, 800168063Sjkim linux_args.flags, linux_args.fd, linux_args.pgoff); 801133819Stjr#endif 802144441Sjhb if ((linux_args.pgoff % PAGE_SIZE) != 0) 803144441Sjhb return (EINVAL); 804144441Sjhb linux_args.pgoff /= PAGE_SIZE; 805133819Stjr 806133819Stjr return (linux_mmap_common(td, &linux_args)); 807133819Stjr} 808133819Stjr 809133819Stjrstatic int 810133819Stjrlinux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args) 811133819Stjr{ 812133819Stjr struct proc *p = td->td_proc; 813133819Stjr struct mmap_args /* { 814133819Stjr caddr_t addr; 815133819Stjr size_t len; 816133819Stjr int prot; 817133819Stjr int flags; 818133819Stjr int fd; 819133819Stjr long pad; 820133819Stjr off_t pos; 821133819Stjr } */ bsd_args; 822133819Stjr int error; 823165832Snetchild struct file *fp; 824133819Stjr 825133819Stjr error = 0; 826133819Stjr bsd_args.flags = 0; 827165832Snetchild fp = NULL; 828165832Snetchild 829165832Snetchild /* 830165832Snetchild * Linux mmap(2): 831165832Snetchild * You must specify exactly one of MAP_SHARED and MAP_PRIVATE 832165832Snetchild */ 833165832Snetchild if (! ((linux_args->flags & LINUX_MAP_SHARED) ^ 834165832Snetchild (linux_args->flags & LINUX_MAP_PRIVATE))) 835165832Snetchild return (EINVAL); 836165832Snetchild 837133819Stjr if (linux_args->flags & LINUX_MAP_SHARED) 838133819Stjr bsd_args.flags |= MAP_SHARED; 839133819Stjr if (linux_args->flags & LINUX_MAP_PRIVATE) 840133819Stjr bsd_args.flags |= MAP_PRIVATE; 841133819Stjr if (linux_args->flags & LINUX_MAP_FIXED) 842133819Stjr bsd_args.flags |= MAP_FIXED; 843133819Stjr if (linux_args->flags & LINUX_MAP_ANON) 844133819Stjr bsd_args.flags |= MAP_ANON; 845133819Stjr else 846133819Stjr bsd_args.flags |= MAP_NOSYNC; 847166727Sjkim if (linux_args->flags & LINUX_MAP_GROWSDOWN) 848133819Stjr bsd_args.flags |= MAP_STACK; 849133819Stjr 850166727Sjkim /* 851166727Sjkim * PROT_READ, PROT_WRITE, or PROT_EXEC implies PROT_READ and PROT_EXEC 852166727Sjkim * on Linux/i386. We do this to ensure maximum compatibility. 853166727Sjkim * Linux/ia64 does the same in i386 emulation mode. 854166727Sjkim */ 855166727Sjkim bsd_args.prot = linux_args->prot; 856166727Sjkim if (bsd_args.prot & (PROT_READ | PROT_WRITE | PROT_EXEC)) 857166727Sjkim bsd_args.prot |= PROT_READ | PROT_EXEC; 858166727Sjkim 859167048Sjkim /* Linux does not check file descriptor when MAP_ANONYMOUS is set. */ 860167048Sjkim bsd_args.fd = (bsd_args.flags & MAP_ANON) ? -1 : linux_args->fd; 861167048Sjkim if (bsd_args.fd != -1) { 862166727Sjkim /* 863166727Sjkim * Linux follows Solaris mmap(2) description: 864166727Sjkim * The file descriptor fildes is opened with 865166727Sjkim * read permission, regardless of the 866166727Sjkim * protection options specified. 867166727Sjkim */ 868166727Sjkim 869167048Sjkim if ((error = fget(td, bsd_args.fd, &fp)) != 0) 870166727Sjkim return (error); 871166727Sjkim if (fp->f_type != DTYPE_VNODE) { 872166727Sjkim fdrop(fp, td); 873166727Sjkim return (EINVAL); 874166727Sjkim } 875166727Sjkim 876166727Sjkim /* Linux mmap() just fails for O_WRONLY files */ 877166727Sjkim if (!(fp->f_flag & FREAD)) { 878166727Sjkim fdrop(fp, td); 879166727Sjkim return (EACCES); 880166727Sjkim } 881166727Sjkim 882166727Sjkim fdrop(fp, td); 883166727Sjkim } 884166727Sjkim 885166727Sjkim if (linux_args->flags & LINUX_MAP_GROWSDOWN) { 886168063Sjkim /* 887168063Sjkim * The Linux MAP_GROWSDOWN option does not limit auto 888133819Stjr * growth of the region. Linux mmap with this option 889133819Stjr * takes as addr the inital BOS, and as len, the initial 890133819Stjr * region size. It can then grow down from addr without 891168063Sjkim * limit. However, Linux threads has an implicit internal 892133819Stjr * limit to stack size of STACK_SIZE. Its just not 893168063Sjkim * enforced explicitly in Linux. But, here we impose 894133819Stjr * a limit of (STACK_SIZE - GUARD_SIZE) on the stack 895133819Stjr * region, since we can do this with our mmap. 896133819Stjr * 897133819Stjr * Our mmap with MAP_STACK takes addr as the maximum 898133819Stjr * downsize limit on BOS, and as len the max size of 899168848Sjkim * the region. It then maps the top SGROWSIZ bytes, 900166944Snetchild * and auto grows the region down, up to the limit 901133819Stjr * in addr. 902133819Stjr * 903133819Stjr * If we don't use the MAP_STACK option, the effect 904133819Stjr * of this code is to allocate a stack region of a 905133819Stjr * fixed size of (STACK_SIZE - GUARD_SIZE). 906133819Stjr */ 907133819Stjr 908166727Sjkim if ((caddr_t)PTRIN(linux_args->addr) + linux_args->len > 909133819Stjr p->p_vmspace->vm_maxsaddr) { 910168063Sjkim /* 911168063Sjkim * Some Linux apps will attempt to mmap 912133819Stjr * thread stacks near the top of their 913133819Stjr * address space. If their TOS is greater 914133819Stjr * than vm_maxsaddr, vm_map_growstack() 915133819Stjr * will confuse the thread stack with the 916133819Stjr * process stack and deliver a SEGV if they 917133819Stjr * attempt to grow the thread stack past their 918133819Stjr * current stacksize rlimit. To avoid this, 919133819Stjr * adjust vm_maxsaddr upwards to reflect 920133819Stjr * the current stacksize rlimit rather 921133819Stjr * than the maximum possible stacksize. 922133819Stjr * It would be better to adjust the 923133819Stjr * mmap'ed region, but some apps do not check 924133819Stjr * mmap's return value. 925133819Stjr */ 926133819Stjr PROC_LOCK(p); 927166727Sjkim p->p_vmspace->vm_maxsaddr = (char *)LINUX32_USRSTACK - 928133819Stjr lim_cur(p, RLIMIT_STACK); 929133819Stjr PROC_UNLOCK(p); 930133819Stjr } 931133819Stjr 932168063Sjkim /* 933176193Sjkim * This gives us our maximum stack size and a new BOS. 934176193Sjkim * If we're using VM_STACK, then mmap will just map 935176193Sjkim * the top SGROWSIZ bytes, and let the stack grow down 936176193Sjkim * to the limit at BOS. If we're not using VM_STACK 937176193Sjkim * we map the full stack, since we don't have a way 938176193Sjkim * to autogrow it. 939133819Stjr */ 940176193Sjkim if (linux_args->len > STACK_SIZE - GUARD_SIZE) { 941176193Sjkim bsd_args.addr = (caddr_t)PTRIN(linux_args->addr); 942176193Sjkim bsd_args.len = linux_args->len; 943176193Sjkim } else { 944176193Sjkim bsd_args.addr = (caddr_t)PTRIN(linux_args->addr) - 945176193Sjkim (STACK_SIZE - GUARD_SIZE - linux_args->len); 946176193Sjkim bsd_args.len = STACK_SIZE - GUARD_SIZE; 947176193Sjkim } 948133819Stjr } else { 949133819Stjr bsd_args.addr = (caddr_t)PTRIN(linux_args->addr); 950133819Stjr bsd_args.len = linux_args->len; 951133819Stjr } 952144441Sjhb bsd_args.pos = (off_t)linux_args->pgoff * PAGE_SIZE; 953133819Stjr 954133819Stjr#ifdef DEBUG 955133819Stjr if (ldebug(mmap)) 956133819Stjr printf("-> %s(%p, %d, %d, 0x%08x, %d, 0x%x)\n", 957133819Stjr __func__, 958133843Sobrien (void *)bsd_args.addr, (int)bsd_args.len, bsd_args.prot, 959133819Stjr bsd_args.flags, bsd_args.fd, (int)bsd_args.pos); 960133819Stjr#endif 961133819Stjr error = mmap(td, &bsd_args); 962133819Stjr#ifdef DEBUG 963133819Stjr if (ldebug(mmap)) 964133819Stjr printf("-> %s() return: 0x%x (0x%08x)\n", 965133819Stjr __func__, error, (u_int)td->td_retval[0]); 966133819Stjr#endif 967133819Stjr return (error); 968133819Stjr} 969133819Stjr 970133819Stjrint 971168035Sjkimlinux_mprotect(struct thread *td, struct linux_mprotect_args *uap) 972168035Sjkim{ 973168035Sjkim struct mprotect_args bsd_args; 974168035Sjkim 975168035Sjkim bsd_args.addr = uap->addr; 976168035Sjkim bsd_args.len = uap->len; 977168035Sjkim bsd_args.prot = uap->prot; 978168035Sjkim if (bsd_args.prot & (PROT_READ | PROT_WRITE | PROT_EXEC)) 979168035Sjkim bsd_args.prot |= PROT_READ | PROT_EXEC; 980168035Sjkim return (mprotect(td, &bsd_args)); 981168035Sjkim} 982168035Sjkim 983168035Sjkimint 984166729Sjkimlinux_iopl(struct thread *td, struct linux_iopl_args *args) 985166729Sjkim{ 986166729Sjkim int error; 987166729Sjkim 988166729Sjkim if (args->level < 0 || args->level > 3) 989166729Sjkim return (EINVAL); 990166729Sjkim if ((error = priv_check(td, PRIV_IO)) != 0) 991166729Sjkim return (error); 992166729Sjkim if ((error = securelevel_gt(td->td_ucred, 0)) != 0) 993166729Sjkim return (error); 994166729Sjkim td->td_frame->tf_rflags = (td->td_frame->tf_rflags & ~PSL_IOPL) | 995166729Sjkim (args->level * (PSL_IOPL / 3)); 996166729Sjkim 997166729Sjkim return (0); 998166729Sjkim} 999166729Sjkim 1000166729Sjkimint 1001133819Stjrlinux_pipe(struct thread *td, struct linux_pipe_args *args) 1002133819Stjr{ 1003133819Stjr int error; 1004184849Sed int fildes[2]; 1005133819Stjr 1006133819Stjr#ifdef DEBUG 1007133819Stjr if (ldebug(pipe)) 1008133819Stjr printf(ARGS(pipe, "*")); 1009133819Stjr#endif 1010133819Stjr 1011184849Sed error = kern_pipe(td, fildes); 1012184849Sed if (error) 1013133819Stjr return (error); 1014133819Stjr 1015184849Sed /* XXX: Close descriptors on error. */ 1016184849Sed return (copyout(fildes, args->pipefds, sizeof fildes)); 1017133819Stjr} 1018166731Sjkim 1019133819Stjrint 1020133819Stjrlinux_sigaction(struct thread *td, struct linux_sigaction_args *args) 1021133819Stjr{ 1022133819Stjr l_osigaction_t osa; 1023133819Stjr l_sigaction_t act, oact; 1024133819Stjr int error; 1025133819Stjr 1026133819Stjr#ifdef DEBUG 1027133819Stjr if (ldebug(sigaction)) 1028133819Stjr printf(ARGS(sigaction, "%d, %p, %p"), 1029133819Stjr args->sig, (void *)args->nsa, (void *)args->osa); 1030133819Stjr#endif 1031133819Stjr 1032133819Stjr if (args->nsa != NULL) { 1033133819Stjr error = copyin(args->nsa, &osa, sizeof(l_osigaction_t)); 1034133819Stjr if (error) 1035133819Stjr return (error); 1036133819Stjr act.lsa_handler = osa.lsa_handler; 1037133819Stjr act.lsa_flags = osa.lsa_flags; 1038133819Stjr act.lsa_restorer = osa.lsa_restorer; 1039133819Stjr LINUX_SIGEMPTYSET(act.lsa_mask); 1040133819Stjr act.lsa_mask.__bits[0] = osa.lsa_mask; 1041133819Stjr } 1042133819Stjr 1043133819Stjr error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, 1044133819Stjr args->osa ? &oact : NULL); 1045133819Stjr 1046133819Stjr if (args->osa != NULL && !error) { 1047133819Stjr osa.lsa_handler = oact.lsa_handler; 1048133819Stjr osa.lsa_flags = oact.lsa_flags; 1049133819Stjr osa.lsa_restorer = oact.lsa_restorer; 1050133819Stjr osa.lsa_mask = oact.lsa_mask.__bits[0]; 1051133819Stjr error = copyout(&osa, args->osa, sizeof(l_osigaction_t)); 1052133819Stjr } 1053133819Stjr 1054133819Stjr return (error); 1055133819Stjr} 1056133819Stjr 1057133819Stjr/* 1058168063Sjkim * Linux has two extra args, restart and oldmask. We don't use these, 1059133819Stjr * but it seems that "restart" is actually a context pointer that 1060133819Stjr * enables the signal to happen with a different register set. 1061133819Stjr */ 1062133819Stjrint 1063133819Stjrlinux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) 1064133819Stjr{ 1065133819Stjr sigset_t sigmask; 1066133819Stjr l_sigset_t mask; 1067133819Stjr 1068133819Stjr#ifdef DEBUG 1069133819Stjr if (ldebug(sigsuspend)) 1070133819Stjr printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask); 1071133819Stjr#endif 1072133819Stjr 1073133819Stjr LINUX_SIGEMPTYSET(mask); 1074133819Stjr mask.__bits[0] = args->mask; 1075133819Stjr linux_to_bsd_sigset(&mask, &sigmask); 1076133819Stjr return (kern_sigsuspend(td, sigmask)); 1077133819Stjr} 1078133819Stjr 1079133819Stjrint 1080133819Stjrlinux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap) 1081133819Stjr{ 1082133819Stjr l_sigset_t lmask; 1083133819Stjr sigset_t sigmask; 1084133819Stjr int error; 1085133819Stjr 1086133819Stjr#ifdef DEBUG 1087133819Stjr if (ldebug(rt_sigsuspend)) 1088133819Stjr printf(ARGS(rt_sigsuspend, "%p, %d"), 1089133819Stjr (void *)uap->newset, uap->sigsetsize); 1090133819Stjr#endif 1091133819Stjr 1092133819Stjr if (uap->sigsetsize != sizeof(l_sigset_t)) 1093133819Stjr return (EINVAL); 1094133819Stjr 1095133819Stjr error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 1096133819Stjr if (error) 1097133819Stjr return (error); 1098133819Stjr 1099133819Stjr linux_to_bsd_sigset(&lmask, &sigmask); 1100133819Stjr return (kern_sigsuspend(td, sigmask)); 1101133819Stjr} 1102133819Stjr 1103133819Stjrint 1104133819Stjrlinux_pause(struct thread *td, struct linux_pause_args *args) 1105133819Stjr{ 1106133819Stjr struct proc *p = td->td_proc; 1107133819Stjr sigset_t sigmask; 1108133819Stjr 1109133819Stjr#ifdef DEBUG 1110133819Stjr if (ldebug(pause)) 1111133819Stjr printf(ARGS(pause, "")); 1112133819Stjr#endif 1113133819Stjr 1114133819Stjr PROC_LOCK(p); 1115133819Stjr sigmask = td->td_sigmask; 1116133819Stjr PROC_UNLOCK(p); 1117133819Stjr return (kern_sigsuspend(td, sigmask)); 1118133819Stjr} 1119133819Stjr 1120133819Stjrint 1121133819Stjrlinux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 1122133819Stjr{ 1123133819Stjr stack_t ss, oss; 1124133819Stjr l_stack_t lss; 1125133819Stjr int error; 1126133819Stjr 1127133819Stjr#ifdef DEBUG 1128133819Stjr if (ldebug(sigaltstack)) 1129133819Stjr printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss); 1130133819Stjr#endif 1131133819Stjr 1132133819Stjr if (uap->uss != NULL) { 1133133819Stjr error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 1134133819Stjr if (error) 1135133819Stjr return (error); 1136133819Stjr 1137133819Stjr ss.ss_sp = PTRIN(lss.ss_sp); 1138133819Stjr ss.ss_size = lss.ss_size; 1139133819Stjr ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 1140133819Stjr } 1141134269Sjhb error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL, 1142134269Sjhb (uap->uoss != NULL) ? &oss : NULL); 1143133819Stjr if (!error && uap->uoss != NULL) { 1144133819Stjr lss.ss_sp = PTROUT(oss.ss_sp); 1145133819Stjr lss.ss_size = oss.ss_size; 1146133819Stjr lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); 1147133819Stjr error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 1148133819Stjr } 1149133819Stjr 1150133819Stjr return (error); 1151133819Stjr} 1152133819Stjr 1153133819Stjrint 1154133819Stjrlinux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args) 1155133819Stjr{ 1156133819Stjr struct ftruncate_args sa; 1157133819Stjr 1158133819Stjr#ifdef DEBUG 1159133819Stjr if (ldebug(ftruncate64)) 1160133819Stjr printf(ARGS(ftruncate64, "%u, %jd"), args->fd, 1161133819Stjr (intmax_t)args->length); 1162133819Stjr#endif 1163133819Stjr 1164133819Stjr sa.fd = args->fd; 1165133819Stjr sa.length = args->length; 1166133819Stjr return ftruncate(td, &sa); 1167133819Stjr} 1168133819Stjr 1169133819Stjrint 1170133819Stjrlinux_gettimeofday(struct thread *td, struct linux_gettimeofday_args *uap) 1171133819Stjr{ 1172133819Stjr struct timeval atv; 1173133819Stjr l_timeval atv32; 1174133819Stjr struct timezone rtz; 1175133819Stjr int error = 0; 1176133819Stjr 1177133819Stjr if (uap->tp) { 1178133819Stjr microtime(&atv); 1179133819Stjr atv32.tv_sec = atv.tv_sec; 1180133819Stjr atv32.tv_usec = atv.tv_usec; 1181168844Sjkim error = copyout(&atv32, uap->tp, sizeof(atv32)); 1182133819Stjr } 1183133819Stjr if (error == 0 && uap->tzp != NULL) { 1184133819Stjr rtz.tz_minuteswest = tz_minuteswest; 1185133819Stjr rtz.tz_dsttime = tz_dsttime; 1186168844Sjkim error = copyout(&rtz, uap->tzp, sizeof(rtz)); 1187133819Stjr } 1188133819Stjr return (error); 1189133819Stjr} 1190133819Stjr 1191133819Stjrint 1192168843Sjkimlinux_settimeofday(struct thread *td, struct linux_settimeofday_args *uap) 1193168843Sjkim{ 1194168843Sjkim l_timeval atv32; 1195168843Sjkim struct timeval atv, *tvp; 1196168843Sjkim struct timezone atz, *tzp; 1197168843Sjkim int error; 1198168843Sjkim 1199168843Sjkim if (uap->tp) { 1200168843Sjkim error = copyin(uap->tp, &atv32, sizeof(atv32)); 1201168843Sjkim if (error) 1202168843Sjkim return (error); 1203168843Sjkim atv.tv_sec = atv32.tv_sec; 1204168843Sjkim atv.tv_usec = atv32.tv_usec; 1205168843Sjkim tvp = &atv; 1206168843Sjkim } else 1207168843Sjkim tvp = NULL; 1208168843Sjkim if (uap->tzp) { 1209168843Sjkim error = copyin(uap->tzp, &atz, sizeof(atz)); 1210168843Sjkim if (error) 1211168843Sjkim return (error); 1212168843Sjkim tzp = &atz; 1213168843Sjkim } else 1214168843Sjkim tzp = NULL; 1215168843Sjkim return (kern_settimeofday(td, tvp, tzp)); 1216168843Sjkim} 1217168843Sjkim 1218168843Sjkimint 1219133819Stjrlinux_getrusage(struct thread *td, struct linux_getrusage_args *uap) 1220133819Stjr{ 1221136152Sjhb struct l_rusage s32; 1222136152Sjhb struct rusage s; 1223133819Stjr int error; 1224133819Stjr 1225136152Sjhb error = kern_getrusage(td, uap->who, &s); 1226133819Stjr if (error != 0) 1227133819Stjr return (error); 1228136152Sjhb if (uap->rusage != NULL) { 1229133819Stjr s32.ru_utime.tv_sec = s.ru_utime.tv_sec; 1230133819Stjr s32.ru_utime.tv_usec = s.ru_utime.tv_usec; 1231133819Stjr s32.ru_stime.tv_sec = s.ru_stime.tv_sec; 1232133819Stjr s32.ru_stime.tv_usec = s.ru_stime.tv_usec; 1233133819Stjr s32.ru_maxrss = s.ru_maxrss; 1234133819Stjr s32.ru_ixrss = s.ru_ixrss; 1235133819Stjr s32.ru_idrss = s.ru_idrss; 1236133819Stjr s32.ru_isrss = s.ru_isrss; 1237133819Stjr s32.ru_minflt = s.ru_minflt; 1238133819Stjr s32.ru_majflt = s.ru_majflt; 1239133819Stjr s32.ru_nswap = s.ru_nswap; 1240133819Stjr s32.ru_inblock = s.ru_inblock; 1241133819Stjr s32.ru_oublock = s.ru_oublock; 1242133819Stjr s32.ru_msgsnd = s.ru_msgsnd; 1243133819Stjr s32.ru_msgrcv = s.ru_msgrcv; 1244133819Stjr s32.ru_nsignals = s.ru_nsignals; 1245133819Stjr s32.ru_nvcsw = s.ru_nvcsw; 1246133819Stjr s32.ru_nivcsw = s.ru_nivcsw; 1247136152Sjhb error = copyout(&s32, uap->rusage, sizeof(s32)); 1248133819Stjr } 1249133819Stjr return (error); 1250133819Stjr} 1251133819Stjr 1252133819Stjrint 1253133819Stjrlinux_sched_rr_get_interval(struct thread *td, 1254133819Stjr struct linux_sched_rr_get_interval_args *uap) 1255133819Stjr{ 1256133819Stjr struct timespec ts; 1257133819Stjr struct l_timespec ts32; 1258133819Stjr int error; 1259133819Stjr 1260144449Sjhb error = kern_sched_rr_get_interval(td, uap->pid, &ts); 1261133819Stjr if (error != 0) 1262133819Stjr return (error); 1263133819Stjr ts32.tv_sec = ts.tv_sec; 1264133819Stjr ts32.tv_nsec = ts.tv_nsec; 1265133819Stjr return (copyout(&ts32, uap->interval, sizeof(ts32))); 1266133819Stjr} 1267133819Stjr 1268133819Stjrint 1269168035Sjkimlinux_set_thread_area(struct thread *td, 1270168035Sjkim struct linux_set_thread_area_args *args) 1271133819Stjr{ 1272168035Sjkim struct l_user_desc info; 1273168035Sjkim struct user_segment_descriptor sd; 1274168035Sjkim int a[2]; 1275168035Sjkim int error; 1276133819Stjr 1277168035Sjkim error = copyin(args->desc, &info, sizeof(struct l_user_desc)); 1278168035Sjkim if (error) 1279168035Sjkim return (error); 1280168035Sjkim 1281168035Sjkim#ifdef DEBUG 1282168035Sjkim if (ldebug(set_thread_area)) 1283168848Sjkim printf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, " 1284168035Sjkim "%i, %i, %i"), info.entry_number, info.base_addr, 1285168035Sjkim info.limit, info.seg_32bit, info.contents, 1286168035Sjkim info.read_exec_only, info.limit_in_pages, 1287168035Sjkim info.seg_not_present, info.useable); 1288168035Sjkim#endif 1289168035Sjkim 1290168035Sjkim /* 1291168035Sjkim * Semantics of Linux version: every thread in the system has array 1292168035Sjkim * of three TLS descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. 1293168035Sjkim * This syscall loads one of the selected TLS decriptors with a value 1294168035Sjkim * and also loads GDT descriptors 6, 7 and 8 with the content of 1295168035Sjkim * the per-thread descriptors. 1296168035Sjkim * 1297168035Sjkim * Semantics of FreeBSD version: I think we can ignore that Linux has 1298168035Sjkim * three per-thread descriptors and use just the first one. 1299168035Sjkim * The tls_array[] is used only in [gs]et_thread_area() syscalls and 1300168035Sjkim * for loading the GDT descriptors. We use just one GDT descriptor 1301168035Sjkim * for TLS, so we will load just one. 1302168848Sjkim * 1303168848Sjkim * XXX: This doesn't work when a user space process tries to use more 1304168035Sjkim * than one TLS segment. Comment in the Linux source says wine might 1305168848Sjkim * do this. 1306168035Sjkim */ 1307168035Sjkim 1308168035Sjkim /* 1309168035Sjkim * GLIBC reads current %gs and call set_thread_area() with it. 1310168035Sjkim * We should let GUDATA_SEL and GUGS32_SEL proceed as well because 1311168035Sjkim * we use these segments. 1312168035Sjkim */ 1313168035Sjkim switch (info.entry_number) { 1314168035Sjkim case GUGS32_SEL: 1315168035Sjkim case GUDATA_SEL: 1316168035Sjkim case 6: 1317168035Sjkim case -1: 1318168035Sjkim info.entry_number = GUGS32_SEL; 1319168035Sjkim break; 1320168035Sjkim default: 1321168035Sjkim return (EINVAL); 1322168035Sjkim } 1323168035Sjkim 1324168035Sjkim /* 1325168035Sjkim * We have to copy out the GDT entry we use. 1326168848Sjkim * 1327168848Sjkim * XXX: What if a user space program does not check the return value 1328168848Sjkim * and tries to use 6, 7 or 8? 1329168035Sjkim */ 1330168035Sjkim error = copyout(&info, args->desc, sizeof(struct l_user_desc)); 1331168035Sjkim if (error) 1332168035Sjkim return (error); 1333168035Sjkim 1334168035Sjkim if (LINUX_LDT_empty(&info)) { 1335168035Sjkim a[0] = 0; 1336168035Sjkim a[1] = 0; 1337168035Sjkim } else { 1338168035Sjkim a[0] = LINUX_LDT_entry_a(&info); 1339168035Sjkim a[1] = LINUX_LDT_entry_b(&info); 1340168035Sjkim } 1341168035Sjkim 1342168035Sjkim memcpy(&sd, &a, sizeof(a)); 1343168035Sjkim#ifdef DEBUG 1344168035Sjkim if (ldebug(set_thread_area)) 1345168035Sjkim printf("Segment created in set_thread_area: " 1346168035Sjkim "lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, " 1347168035Sjkim "type: %i, dpl: %i, p: %i, xx: %i, long: %i, " 1348168035Sjkim "def32: %i, gran: %i\n", 1349168035Sjkim sd.sd_lobase, 1350168035Sjkim sd.sd_hibase, 1351168035Sjkim sd.sd_lolimit, 1352168035Sjkim sd.sd_hilimit, 1353168035Sjkim sd.sd_type, 1354168035Sjkim sd.sd_dpl, 1355168035Sjkim sd.sd_p, 1356168035Sjkim sd.sd_xx, 1357168035Sjkim sd.sd_long, 1358168035Sjkim sd.sd_def32, 1359168035Sjkim sd.sd_gran); 1360168035Sjkim#endif 1361168035Sjkim 1362168035Sjkim critical_enter(); 1363168035Sjkim td->td_pcb->pcb_gsbase = (register_t)info.base_addr; 1364182868Skib td->td_pcb->pcb_gs32sd = *PCPU_GET(gs32p) = sd; 1365182866Skib td->td_pcb->pcb_flags |= PCB_32BIT | PCB_GS32BIT; 1366168035Sjkim wrmsr(MSR_KGSBASE, td->td_pcb->pcb_gsbase); 1367168035Sjkim critical_exit(); 1368168035Sjkim 1369168035Sjkim return (0); 1370133819Stjr} 1371