1146aad74SMarcel Moolenaar /*- 2146aad74SMarcel Moolenaar * Copyright (c) 2000 Marcel Moolenaar 3146aad74SMarcel Moolenaar * All rights reserved. 4146aad74SMarcel Moolenaar * 5146aad74SMarcel Moolenaar * Redistribution and use in source and binary forms, with or without 6146aad74SMarcel Moolenaar * modification, are permitted provided that the following conditions 7146aad74SMarcel Moolenaar * are met: 8146aad74SMarcel Moolenaar * 1. Redistributions of source code must retain the above copyright 9146aad74SMarcel Moolenaar * notice, this list of conditions and the following disclaimer 10146aad74SMarcel Moolenaar * in this position and unchanged. 11146aad74SMarcel Moolenaar * 2. Redistributions in binary form must reproduce the above copyright 12146aad74SMarcel Moolenaar * notice, this list of conditions and the following disclaimer in the 13146aad74SMarcel Moolenaar * documentation and/or other materials provided with the distribution. 14146aad74SMarcel Moolenaar * 3. The name of the author may not be used to endorse or promote products 15bc34729cSMarcel Moolenaar * derived from this software without specific prior written permission. 16146aad74SMarcel Moolenaar * 17146aad74SMarcel Moolenaar * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18146aad74SMarcel Moolenaar * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19146aad74SMarcel Moolenaar * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20146aad74SMarcel Moolenaar * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21146aad74SMarcel Moolenaar * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22146aad74SMarcel Moolenaar * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23146aad74SMarcel Moolenaar * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24146aad74SMarcel Moolenaar * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25146aad74SMarcel Moolenaar * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26146aad74SMarcel Moolenaar * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27146aad74SMarcel Moolenaar * 28146aad74SMarcel Moolenaar * $FreeBSD$ 29146aad74SMarcel Moolenaar */ 30146aad74SMarcel Moolenaar 31146aad74SMarcel Moolenaar #include <sys/param.h> 32146aad74SMarcel Moolenaar #include <sys/mman.h> 33146aad74SMarcel Moolenaar #include <sys/proc.h> 34146aad74SMarcel Moolenaar #include <sys/sysproto.h> 35146aad74SMarcel Moolenaar #include <sys/systm.h> 36146aad74SMarcel Moolenaar #include <sys/unistd.h> 37242fae60SAndrew Gallatin #include <sys/resource.h> 38242fae60SAndrew Gallatin #include <sys/resourcevar.h> 39146aad74SMarcel Moolenaar 40146aad74SMarcel Moolenaar #include <machine/frame.h> 41146aad74SMarcel Moolenaar #include <machine/psl.h> 42146aad74SMarcel Moolenaar #include <machine/segments.h> 43146aad74SMarcel Moolenaar #include <machine/sysarch.h> 44146aad74SMarcel Moolenaar 45242fae60SAndrew Gallatin #include <vm/vm.h> 46242fae60SAndrew Gallatin #include <sys/lock.h> 47242fae60SAndrew Gallatin #include <vm/pmap.h> 48242fae60SAndrew Gallatin #include <vm/vm_map.h> 49242fae60SAndrew Gallatin 50146aad74SMarcel Moolenaar #include <i386/linux/linux.h> 51ebea8660SMarcel Moolenaar #include <i386/linux/linux_proto.h> 52146aad74SMarcel Moolenaar #include <compat/linux/linux_ipc.h> 53146aad74SMarcel Moolenaar #include <compat/linux/linux_signal.h> 54146aad74SMarcel Moolenaar #include <compat/linux/linux_util.h> 55146aad74SMarcel Moolenaar 56146aad74SMarcel Moolenaar struct linux_descriptor { 57146aad74SMarcel Moolenaar unsigned int entry_number; 58146aad74SMarcel Moolenaar unsigned long base_addr; 59146aad74SMarcel Moolenaar unsigned int limit; 60146aad74SMarcel Moolenaar unsigned int seg_32bit:1; 61146aad74SMarcel Moolenaar unsigned int contents:2; 62146aad74SMarcel Moolenaar unsigned int read_exec_only:1; 63146aad74SMarcel Moolenaar unsigned int limit_in_pages:1; 64146aad74SMarcel Moolenaar unsigned int seg_not_present:1; 65146aad74SMarcel Moolenaar unsigned int useable:1; 66146aad74SMarcel Moolenaar }; 67146aad74SMarcel Moolenaar 68146aad74SMarcel Moolenaar struct linux_select_argv { 69146aad74SMarcel Moolenaar int nfds; 70146aad74SMarcel Moolenaar fd_set *readfds; 71146aad74SMarcel Moolenaar fd_set *writefds; 72146aad74SMarcel Moolenaar fd_set *exceptfds; 73146aad74SMarcel Moolenaar struct timeval *timeout; 74146aad74SMarcel Moolenaar }; 75146aad74SMarcel Moolenaar 76146aad74SMarcel Moolenaar int 77931a7258SAndrew Gallatin linux_to_bsd_sigaltstack(int lsa) 78931a7258SAndrew Gallatin { 79931a7258SAndrew Gallatin int bsa = 0; 80931a7258SAndrew Gallatin 81931a7258SAndrew Gallatin if (lsa & LINUX_SS_DISABLE) 82931a7258SAndrew Gallatin bsa |= SS_DISABLE; 83931a7258SAndrew Gallatin if (lsa & LINUX_SS_ONSTACK) 84931a7258SAndrew Gallatin bsa |= SS_ONSTACK; 85931a7258SAndrew Gallatin if (lsa == LINUX_SS_ONSTACK_BC) 86931a7258SAndrew Gallatin bsa = SS_ONSTACK; 87931a7258SAndrew Gallatin return (bsa); 88931a7258SAndrew Gallatin } 89931a7258SAndrew Gallatin 90931a7258SAndrew Gallatin int 91931a7258SAndrew Gallatin bsd_to_linux_sigaltstack(int bsa) 92931a7258SAndrew Gallatin { 93931a7258SAndrew Gallatin int lsa = 0; 94931a7258SAndrew Gallatin 95931a7258SAndrew Gallatin if (bsa & SS_DISABLE) 96931a7258SAndrew Gallatin lsa |= LINUX_SS_DISABLE; 97931a7258SAndrew Gallatin if (bsa & SS_ONSTACK) 98931a7258SAndrew Gallatin lsa |= LINUX_SS_ONSTACK; 99931a7258SAndrew Gallatin return (lsa); 100931a7258SAndrew Gallatin } 101931a7258SAndrew Gallatin 102931a7258SAndrew Gallatin int 103146aad74SMarcel Moolenaar linux_execve(struct proc *p, struct linux_execve_args *args) 104146aad74SMarcel Moolenaar { 105146aad74SMarcel Moolenaar struct execve_args bsd; 106146aad74SMarcel Moolenaar caddr_t sg; 107146aad74SMarcel Moolenaar 108146aad74SMarcel Moolenaar sg = stackgap_init(); 109146aad74SMarcel Moolenaar CHECKALTEXIST(p, &sg, args->path); 110146aad74SMarcel Moolenaar 111146aad74SMarcel Moolenaar #ifdef DEBUG 112146aad74SMarcel Moolenaar printf("Linux-emul(%d): execve(%s)\n", 113146aad74SMarcel Moolenaar p->p_pid, args->path); 114146aad74SMarcel Moolenaar #endif 115146aad74SMarcel Moolenaar 116146aad74SMarcel Moolenaar bsd.fname = args->path; 117146aad74SMarcel Moolenaar bsd.argv = args->argp; 118146aad74SMarcel Moolenaar bsd.envv = args->envp; 119146aad74SMarcel Moolenaar return (execve(p, &bsd)); 120146aad74SMarcel Moolenaar } 121146aad74SMarcel Moolenaar 122146aad74SMarcel Moolenaar int 123146aad74SMarcel Moolenaar linux_ipc(struct proc *p, struct linux_ipc_args *args) 124146aad74SMarcel Moolenaar { 125146aad74SMarcel Moolenaar switch (args->what) { 126146aad74SMarcel Moolenaar case LINUX_SEMOP: 127146aad74SMarcel Moolenaar return (linux_semop(p, args)); 128146aad74SMarcel Moolenaar case LINUX_SEMGET: 129146aad74SMarcel Moolenaar return (linux_semget(p, args)); 130146aad74SMarcel Moolenaar case LINUX_SEMCTL: 131146aad74SMarcel Moolenaar return (linux_semctl(p, args)); 132146aad74SMarcel Moolenaar case LINUX_MSGSND: 133146aad74SMarcel Moolenaar return (linux_msgsnd(p, args)); 134146aad74SMarcel Moolenaar case LINUX_MSGRCV: 135146aad74SMarcel Moolenaar return (linux_msgrcv(p, args)); 136146aad74SMarcel Moolenaar case LINUX_MSGGET: 137146aad74SMarcel Moolenaar return (linux_msgget(p, args)); 138146aad74SMarcel Moolenaar case LINUX_MSGCTL: 139146aad74SMarcel Moolenaar return (linux_msgctl(p, args)); 140146aad74SMarcel Moolenaar case LINUX_SHMAT: 141146aad74SMarcel Moolenaar return (linux_shmat(p, args)); 142146aad74SMarcel Moolenaar case LINUX_SHMDT: 143146aad74SMarcel Moolenaar return (linux_shmdt(p, args)); 144146aad74SMarcel Moolenaar case LINUX_SHMGET: 145146aad74SMarcel Moolenaar return (linux_shmget(p, args)); 146146aad74SMarcel Moolenaar case LINUX_SHMCTL: 147146aad74SMarcel Moolenaar return (linux_shmctl(p, args)); 148146aad74SMarcel Moolenaar } 149146aad74SMarcel Moolenaar 150146aad74SMarcel Moolenaar uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what); 151146aad74SMarcel Moolenaar return (ENOSYS); 152146aad74SMarcel Moolenaar } 153146aad74SMarcel Moolenaar 154146aad74SMarcel Moolenaar int 155146aad74SMarcel Moolenaar linux_select(struct proc *p, struct linux_select_args *args) 156146aad74SMarcel Moolenaar { 157146aad74SMarcel Moolenaar struct linux_select_argv linux_args; 158146aad74SMarcel Moolenaar struct linux_newselect_args newsel; 159146aad74SMarcel Moolenaar int error; 160146aad74SMarcel Moolenaar 161146aad74SMarcel Moolenaar #ifdef SELECT_DEBUG 162146aad74SMarcel Moolenaar printf("Linux-emul(%ld): select(%x)\n", (long)p->p_pid, args->ptr); 163146aad74SMarcel Moolenaar #endif 164146aad74SMarcel Moolenaar 165146aad74SMarcel Moolenaar error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 166146aad74SMarcel Moolenaar if (error) 167146aad74SMarcel Moolenaar return (error); 168146aad74SMarcel Moolenaar 169146aad74SMarcel Moolenaar newsel.nfds = linux_args.nfds; 170146aad74SMarcel Moolenaar newsel.readfds = linux_args.readfds; 171146aad74SMarcel Moolenaar newsel.writefds = linux_args.writefds; 172146aad74SMarcel Moolenaar newsel.exceptfds = linux_args.exceptfds; 173146aad74SMarcel Moolenaar newsel.timeout = linux_args.timeout; 174146aad74SMarcel Moolenaar return (linux_newselect(p, &newsel)); 175146aad74SMarcel Moolenaar } 176146aad74SMarcel Moolenaar 177146aad74SMarcel Moolenaar int 178146aad74SMarcel Moolenaar linux_fork(struct proc *p, struct linux_fork_args *args) 179146aad74SMarcel Moolenaar { 180146aad74SMarcel Moolenaar int error; 181146aad74SMarcel Moolenaar 182146aad74SMarcel Moolenaar #ifdef DEBUG 183146aad74SMarcel Moolenaar printf("Linux-emul(%ld): fork()\n", (long)p->p_pid); 184146aad74SMarcel Moolenaar #endif 185146aad74SMarcel Moolenaar 186146aad74SMarcel Moolenaar if ((error = fork(p, (struct fork_args *)args)) != 0) 187146aad74SMarcel Moolenaar return (error); 188146aad74SMarcel Moolenaar 189146aad74SMarcel Moolenaar if (p->p_retval[1] == 1) 190146aad74SMarcel Moolenaar p->p_retval[0] = 0; 191146aad74SMarcel Moolenaar return (0); 192146aad74SMarcel Moolenaar } 193146aad74SMarcel Moolenaar 194146aad74SMarcel Moolenaar int 195146aad74SMarcel Moolenaar linux_vfork(struct proc *p, struct linux_vfork_args *args) 196146aad74SMarcel Moolenaar { 197146aad74SMarcel Moolenaar int error; 198146aad74SMarcel Moolenaar 199146aad74SMarcel Moolenaar #ifdef DEBUG 200146aad74SMarcel Moolenaar printf("Linux-emul(%ld): vfork()\n", (long)p->p_pid); 201146aad74SMarcel Moolenaar #endif 202146aad74SMarcel Moolenaar 203146aad74SMarcel Moolenaar if ((error = vfork(p, (struct vfork_args *)args)) != 0) 204146aad74SMarcel Moolenaar return (error); 205146aad74SMarcel Moolenaar /* Are we the child? */ 206146aad74SMarcel Moolenaar if (p->p_retval[1] == 1) 207146aad74SMarcel Moolenaar p->p_retval[0] = 0; 208146aad74SMarcel Moolenaar return (0); 209146aad74SMarcel Moolenaar } 210146aad74SMarcel Moolenaar 211146aad74SMarcel Moolenaar #define CLONE_VM 0x100 212146aad74SMarcel Moolenaar #define CLONE_FS 0x200 213146aad74SMarcel Moolenaar #define CLONE_FILES 0x400 214146aad74SMarcel Moolenaar #define CLONE_SIGHAND 0x800 215146aad74SMarcel Moolenaar #define CLONE_PID 0x1000 216146aad74SMarcel Moolenaar 217146aad74SMarcel Moolenaar int 218146aad74SMarcel Moolenaar linux_clone(struct proc *p, struct linux_clone_args *args) 219146aad74SMarcel Moolenaar { 220146aad74SMarcel Moolenaar int error, ff = RFPROC; 221146aad74SMarcel Moolenaar struct proc *p2; 222146aad74SMarcel Moolenaar int exit_signal; 223146aad74SMarcel Moolenaar vm_offset_t start; 224146aad74SMarcel Moolenaar struct rfork_args rf_args; 225146aad74SMarcel Moolenaar 226146aad74SMarcel Moolenaar #ifdef DEBUG 227146aad74SMarcel Moolenaar if (args->flags & CLONE_PID) 228146aad74SMarcel Moolenaar printf("linux_clone(%ld): CLONE_PID not yet supported\n", 229146aad74SMarcel Moolenaar (long)p->p_pid); 230146aad74SMarcel Moolenaar printf("linux_clone(%ld): invoked with flags %x and stack %x\n", 231146aad74SMarcel Moolenaar (long)p->p_pid, (unsigned int)args->flags, 232146aad74SMarcel Moolenaar (unsigned int)args->stack); 233146aad74SMarcel Moolenaar #endif 234146aad74SMarcel Moolenaar 235146aad74SMarcel Moolenaar if (!args->stack) 236146aad74SMarcel Moolenaar return (EINVAL); 237146aad74SMarcel Moolenaar 238146aad74SMarcel Moolenaar exit_signal = args->flags & 0x000000ff; 239146aad74SMarcel Moolenaar if (exit_signal >= LINUX_NSIG) 240146aad74SMarcel Moolenaar return (EINVAL); 241146aad74SMarcel Moolenaar 242146aad74SMarcel Moolenaar if (exit_signal <= LINUX_SIGTBLSZ) 243146aad74SMarcel Moolenaar exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)]; 244146aad74SMarcel Moolenaar 245146aad74SMarcel Moolenaar /* RFTHREAD probably not necessary here, but it shouldn't hurt */ 246146aad74SMarcel Moolenaar ff |= RFTHREAD; 247146aad74SMarcel Moolenaar 248146aad74SMarcel Moolenaar if (args->flags & CLONE_VM) 249146aad74SMarcel Moolenaar ff |= RFMEM; 250146aad74SMarcel Moolenaar if (args->flags & CLONE_SIGHAND) 251146aad74SMarcel Moolenaar ff |= RFSIGSHARE; 252146aad74SMarcel Moolenaar if (!(args->flags & CLONE_FILES)) 253146aad74SMarcel Moolenaar ff |= RFFDG; 254146aad74SMarcel Moolenaar 255146aad74SMarcel Moolenaar error = 0; 256146aad74SMarcel Moolenaar start = 0; 257146aad74SMarcel Moolenaar 258146aad74SMarcel Moolenaar rf_args.flags = ff; 259146aad74SMarcel Moolenaar if ((error = rfork(p, &rf_args)) != 0) 260146aad74SMarcel Moolenaar return (error); 261146aad74SMarcel Moolenaar 262146aad74SMarcel Moolenaar p2 = pfind(p->p_retval[0]); 263146aad74SMarcel Moolenaar if (p2 == 0) 264146aad74SMarcel Moolenaar return (ESRCH); 265146aad74SMarcel Moolenaar 266146aad74SMarcel Moolenaar p2->p_sigparent = exit_signal; 267146aad74SMarcel Moolenaar p2->p_md.md_regs->tf_esp = (unsigned int)args->stack; 268146aad74SMarcel Moolenaar 269146aad74SMarcel Moolenaar #ifdef DEBUG 270146aad74SMarcel Moolenaar printf ("linux_clone(%ld): successful rfork to %ld\n", (long)p->p_pid, 271146aad74SMarcel Moolenaar (long)p2->p_pid); 272146aad74SMarcel Moolenaar #endif 273146aad74SMarcel Moolenaar 274146aad74SMarcel Moolenaar return (0); 275146aad74SMarcel Moolenaar } 276146aad74SMarcel Moolenaar 277146aad74SMarcel Moolenaar /* XXX move */ 278146aad74SMarcel Moolenaar struct linux_mmap_argv { 279146aad74SMarcel Moolenaar linux_caddr_t addr; 280146aad74SMarcel Moolenaar int len; 281146aad74SMarcel Moolenaar int prot; 282146aad74SMarcel Moolenaar int flags; 283146aad74SMarcel Moolenaar int fd; 284146aad74SMarcel Moolenaar int pos; 285146aad74SMarcel Moolenaar }; 286146aad74SMarcel Moolenaar 287146aad74SMarcel Moolenaar #define STACK_SIZE (2 * 1024 * 1024) 288146aad74SMarcel Moolenaar #define GUARD_SIZE (4 * PAGE_SIZE) 289146aad74SMarcel Moolenaar 290146aad74SMarcel Moolenaar int 291146aad74SMarcel Moolenaar linux_mmap(struct proc *p, struct linux_mmap_args *args) 292146aad74SMarcel Moolenaar { 293146aad74SMarcel Moolenaar struct mmap_args /* { 294146aad74SMarcel Moolenaar caddr_t addr; 295146aad74SMarcel Moolenaar size_t len; 296146aad74SMarcel Moolenaar int prot; 297146aad74SMarcel Moolenaar int flags; 298146aad74SMarcel Moolenaar int fd; 299146aad74SMarcel Moolenaar long pad; 300146aad74SMarcel Moolenaar off_t pos; 301146aad74SMarcel Moolenaar } */ bsd_args; 302146aad74SMarcel Moolenaar int error; 303146aad74SMarcel Moolenaar struct linux_mmap_argv linux_args; 304146aad74SMarcel Moolenaar 305146aad74SMarcel Moolenaar error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 306146aad74SMarcel Moolenaar if (error) 307146aad74SMarcel Moolenaar return (error); 308146aad74SMarcel Moolenaar 309146aad74SMarcel Moolenaar #ifdef DEBUG 310146aad74SMarcel Moolenaar printf("Linux-emul(%ld): mmap(%p, %d, %d, 0x%08x, %d, %d)", 311146aad74SMarcel Moolenaar (long)p->p_pid, (void *)linux_args.addr, linux_args.len, 312146aad74SMarcel Moolenaar linux_args.prot, linux_args.flags, linux_args.fd, linux_args.pos); 313146aad74SMarcel Moolenaar #endif 314146aad74SMarcel Moolenaar 315146aad74SMarcel Moolenaar bsd_args.flags = 0; 316146aad74SMarcel Moolenaar if (linux_args.flags & LINUX_MAP_SHARED) 317146aad74SMarcel Moolenaar bsd_args.flags |= MAP_SHARED; 318146aad74SMarcel Moolenaar if (linux_args.flags & LINUX_MAP_PRIVATE) 319146aad74SMarcel Moolenaar bsd_args.flags |= MAP_PRIVATE; 320146aad74SMarcel Moolenaar if (linux_args.flags & LINUX_MAP_FIXED) 321146aad74SMarcel Moolenaar bsd_args.flags |= MAP_FIXED; 322146aad74SMarcel Moolenaar if (linux_args.flags & LINUX_MAP_ANON) 323146aad74SMarcel Moolenaar bsd_args.flags |= MAP_ANON; 324146aad74SMarcel Moolenaar if (linux_args.flags & LINUX_MAP_GROWSDOWN) { 325146aad74SMarcel Moolenaar bsd_args.flags |= MAP_STACK; 326146aad74SMarcel Moolenaar 327146aad74SMarcel Moolenaar /* The linux MAP_GROWSDOWN option does not limit auto 328146aad74SMarcel Moolenaar * growth of the region. Linux mmap with this option 329146aad74SMarcel Moolenaar * takes as addr the inital BOS, and as len, the initial 330146aad74SMarcel Moolenaar * region size. It can then grow down from addr without 331146aad74SMarcel Moolenaar * limit. However, linux threads has an implicit internal 332146aad74SMarcel Moolenaar * limit to stack size of STACK_SIZE. Its just not 333146aad74SMarcel Moolenaar * enforced explicitly in linux. But, here we impose 334146aad74SMarcel Moolenaar * a limit of (STACK_SIZE - GUARD_SIZE) on the stack 335146aad74SMarcel Moolenaar * region, since we can do this with our mmap. 336146aad74SMarcel Moolenaar * 337146aad74SMarcel Moolenaar * Our mmap with MAP_STACK takes addr as the maximum 338146aad74SMarcel Moolenaar * downsize limit on BOS, and as len the max size of 339146aad74SMarcel Moolenaar * the region. It them maps the top SGROWSIZ bytes, 340146aad74SMarcel Moolenaar * and autgrows the region down, up to the limit 341146aad74SMarcel Moolenaar * in addr. 342146aad74SMarcel Moolenaar * 343146aad74SMarcel Moolenaar * If we don't use the MAP_STACK option, the effect 344146aad74SMarcel Moolenaar * of this code is to allocate a stack region of a 345146aad74SMarcel Moolenaar * fixed size of (STACK_SIZE - GUARD_SIZE). 346146aad74SMarcel Moolenaar */ 347146aad74SMarcel Moolenaar 348146aad74SMarcel Moolenaar /* This gives us TOS */ 349146aad74SMarcel Moolenaar bsd_args.addr = linux_args.addr + linux_args.len; 350146aad74SMarcel Moolenaar 351242fae60SAndrew Gallatin if (bsd_args.addr > p->p_vmspace->vm_maxsaddr) { 352242fae60SAndrew Gallatin /* Some linux apps will attempt to mmap 353242fae60SAndrew Gallatin * thread stacks near the top of their 354242fae60SAndrew Gallatin * address space. If their TOS is greater 355242fae60SAndrew Gallatin * than vm_maxsaddr, vm_map_growstack() 356242fae60SAndrew Gallatin * will confuse the thread stack with the 357242fae60SAndrew Gallatin * process stack and deliver a SEGV if they 358242fae60SAndrew Gallatin * attempt to grow the thread stack past their 359242fae60SAndrew Gallatin * current stacksize rlimit. To avoid this, 360242fae60SAndrew Gallatin * adjust vm_maxsaddr upwards to reflect 361242fae60SAndrew Gallatin * the current stacksize rlimit rather 362242fae60SAndrew Gallatin * than the maximum possible stacksize. 363242fae60SAndrew Gallatin * It would be better to adjust the 364242fae60SAndrew Gallatin * mmap'ed region, but some apps do not check 365242fae60SAndrew Gallatin * mmap's return value. 366242fae60SAndrew Gallatin */ 367242fae60SAndrew Gallatin p->p_vmspace->vm_maxsaddr = (char *)USRSTACK - 368242fae60SAndrew Gallatin p->p_rlimit[RLIMIT_STACK].rlim_cur; 369242fae60SAndrew Gallatin } 370242fae60SAndrew Gallatin 371146aad74SMarcel Moolenaar /* This gives us our maximum stack size */ 372146aad74SMarcel Moolenaar if (linux_args.len > STACK_SIZE - GUARD_SIZE) 373146aad74SMarcel Moolenaar bsd_args.len = linux_args.len; 374146aad74SMarcel Moolenaar else 375146aad74SMarcel Moolenaar bsd_args.len = STACK_SIZE - GUARD_SIZE; 376146aad74SMarcel Moolenaar 377146aad74SMarcel Moolenaar /* This gives us a new BOS. If we're using VM_STACK, then 378146aad74SMarcel Moolenaar * mmap will just map the top SGROWSIZ bytes, and let 379146aad74SMarcel Moolenaar * the stack grow down to the limit at BOS. If we're 380146aad74SMarcel Moolenaar * not using VM_STACK we map the full stack, since we 381146aad74SMarcel Moolenaar * don't have a way to autogrow it. 382146aad74SMarcel Moolenaar */ 383146aad74SMarcel Moolenaar bsd_args.addr -= bsd_args.len; 384146aad74SMarcel Moolenaar } else { 385146aad74SMarcel Moolenaar bsd_args.addr = linux_args.addr; 386146aad74SMarcel Moolenaar bsd_args.len = linux_args.len; 387146aad74SMarcel Moolenaar } 388146aad74SMarcel Moolenaar 389146aad74SMarcel Moolenaar bsd_args.prot = linux_args.prot | PROT_READ; /* always required */ 390146aad74SMarcel Moolenaar if (linux_args.flags & LINUX_MAP_ANON) 391146aad74SMarcel Moolenaar bsd_args.fd = -1; 392146aad74SMarcel Moolenaar else 393146aad74SMarcel Moolenaar bsd_args.fd = linux_args.fd; 394146aad74SMarcel Moolenaar bsd_args.pos = linux_args.pos; 395146aad74SMarcel Moolenaar bsd_args.pad = 0; 396146aad74SMarcel Moolenaar 397146aad74SMarcel Moolenaar #ifdef DEBUG 398146aad74SMarcel Moolenaar printf("-> (%p, %d, %d, 0x%08x, %d, %d)\n", (void *)bsd_args.addr, 399146aad74SMarcel Moolenaar bsd_args.len, bsd_args.prot, bsd_args.flags, bsd_args.fd, 400146aad74SMarcel Moolenaar (int)bsd_args.pos); 401146aad74SMarcel Moolenaar #endif 402146aad74SMarcel Moolenaar 403146aad74SMarcel Moolenaar return (mmap(p, &bsd_args)); 404146aad74SMarcel Moolenaar } 405146aad74SMarcel Moolenaar 406146aad74SMarcel Moolenaar int 407146aad74SMarcel Moolenaar linux_pipe(struct proc *p, struct linux_pipe_args *args) 408146aad74SMarcel Moolenaar { 409146aad74SMarcel Moolenaar int error; 410146aad74SMarcel Moolenaar int reg_edx; 411146aad74SMarcel Moolenaar 412146aad74SMarcel Moolenaar #ifdef DEBUG 413146aad74SMarcel Moolenaar printf("Linux-emul(%ld): pipe(*)\n", (long)p->p_pid); 414146aad74SMarcel Moolenaar #endif 415146aad74SMarcel Moolenaar 416146aad74SMarcel Moolenaar reg_edx = p->p_retval[1]; 417146aad74SMarcel Moolenaar error = pipe(p, 0); 418146aad74SMarcel Moolenaar if (error) { 419146aad74SMarcel Moolenaar p->p_retval[1] = reg_edx; 420146aad74SMarcel Moolenaar return (error); 421146aad74SMarcel Moolenaar } 422146aad74SMarcel Moolenaar 423146aad74SMarcel Moolenaar error = copyout(p->p_retval, args->pipefds, 2*sizeof(int)); 424146aad74SMarcel Moolenaar if (error) { 425146aad74SMarcel Moolenaar p->p_retval[1] = reg_edx; 426146aad74SMarcel Moolenaar return (error); 427146aad74SMarcel Moolenaar } 428146aad74SMarcel Moolenaar 429146aad74SMarcel Moolenaar p->p_retval[1] = reg_edx; 430146aad74SMarcel Moolenaar p->p_retval[0] = 0; 431146aad74SMarcel Moolenaar return (0); 432146aad74SMarcel Moolenaar } 433146aad74SMarcel Moolenaar 434146aad74SMarcel Moolenaar int 435146aad74SMarcel Moolenaar linux_ioperm(struct proc *p, struct linux_ioperm_args *args) 436146aad74SMarcel Moolenaar { 437146aad74SMarcel Moolenaar struct sysarch_args sa; 438146aad74SMarcel Moolenaar struct i386_ioperm_args *iia; 439146aad74SMarcel Moolenaar caddr_t sg; 440146aad74SMarcel Moolenaar 441146aad74SMarcel Moolenaar sg = stackgap_init(); 442146aad74SMarcel Moolenaar iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args)); 443146aad74SMarcel Moolenaar iia->start = args->start; 444146aad74SMarcel Moolenaar iia->length = args->length; 445146aad74SMarcel Moolenaar iia->enable = args->enable; 446146aad74SMarcel Moolenaar sa.op = I386_SET_IOPERM; 447146aad74SMarcel Moolenaar sa.parms = (char *)iia; 448146aad74SMarcel Moolenaar return (sysarch(p, &sa)); 449146aad74SMarcel Moolenaar } 450146aad74SMarcel Moolenaar 451146aad74SMarcel Moolenaar int 452146aad74SMarcel Moolenaar linux_iopl(struct proc *p, struct linux_iopl_args *args) 453146aad74SMarcel Moolenaar { 454146aad74SMarcel Moolenaar int error; 455146aad74SMarcel Moolenaar 456146aad74SMarcel Moolenaar if (args->level < 0 || args->level > 3) 457146aad74SMarcel Moolenaar return (EINVAL); 458146aad74SMarcel Moolenaar if ((error = suser(p)) != 0) 459146aad74SMarcel Moolenaar return (error); 460146aad74SMarcel Moolenaar if (securelevel > 0) 461146aad74SMarcel Moolenaar return (EPERM); 462146aad74SMarcel Moolenaar p->p_md.md_regs->tf_eflags = (p->p_md.md_regs->tf_eflags & ~PSL_IOPL) | 463146aad74SMarcel Moolenaar (args->level * (PSL_IOPL / 3)); 464146aad74SMarcel Moolenaar return (0); 465146aad74SMarcel Moolenaar } 466146aad74SMarcel Moolenaar 467146aad74SMarcel Moolenaar int 468146aad74SMarcel Moolenaar linux_modify_ldt(p, uap) 469146aad74SMarcel Moolenaar struct proc *p; 470146aad74SMarcel Moolenaar struct linux_modify_ldt_args *uap; 471146aad74SMarcel Moolenaar { 472146aad74SMarcel Moolenaar int error; 473146aad74SMarcel Moolenaar caddr_t sg; 474146aad74SMarcel Moolenaar struct sysarch_args args; 475146aad74SMarcel Moolenaar struct i386_ldt_args *ldt; 476146aad74SMarcel Moolenaar struct linux_descriptor ld; 477146aad74SMarcel Moolenaar union descriptor *desc; 478146aad74SMarcel Moolenaar 479146aad74SMarcel Moolenaar sg = stackgap_init(); 480146aad74SMarcel Moolenaar 481146aad74SMarcel Moolenaar if (uap->ptr == NULL) 482146aad74SMarcel Moolenaar return (EINVAL); 483146aad74SMarcel Moolenaar 484146aad74SMarcel Moolenaar switch (uap->func) { 485146aad74SMarcel Moolenaar case 0x00: /* read_ldt */ 486146aad74SMarcel Moolenaar ldt = stackgap_alloc(&sg, sizeof(*ldt)); 487146aad74SMarcel Moolenaar ldt->start = 0; 488146aad74SMarcel Moolenaar ldt->descs = uap->ptr; 489146aad74SMarcel Moolenaar ldt->num = uap->bytecount / sizeof(union descriptor); 490146aad74SMarcel Moolenaar args.op = I386_GET_LDT; 491146aad74SMarcel Moolenaar args.parms = (char*)ldt; 492146aad74SMarcel Moolenaar error = sysarch(p, &args); 493146aad74SMarcel Moolenaar p->p_retval[0] *= sizeof(union descriptor); 494146aad74SMarcel Moolenaar break; 495146aad74SMarcel Moolenaar case 0x01: /* write_ldt */ 496146aad74SMarcel Moolenaar case 0x11: /* write_ldt */ 497146aad74SMarcel Moolenaar if (uap->bytecount != sizeof(ld)) 498146aad74SMarcel Moolenaar return (EINVAL); 499146aad74SMarcel Moolenaar 500146aad74SMarcel Moolenaar error = copyin(uap->ptr, &ld, sizeof(ld)); 501146aad74SMarcel Moolenaar if (error) 502146aad74SMarcel Moolenaar return (error); 503146aad74SMarcel Moolenaar 504146aad74SMarcel Moolenaar ldt = stackgap_alloc(&sg, sizeof(*ldt)); 505146aad74SMarcel Moolenaar desc = stackgap_alloc(&sg, sizeof(*desc)); 506146aad74SMarcel Moolenaar ldt->start = ld.entry_number; 507146aad74SMarcel Moolenaar ldt->descs = desc; 508146aad74SMarcel Moolenaar ldt->num = 1; 509146aad74SMarcel Moolenaar desc->sd.sd_lolimit = (ld.limit & 0x0000ffff); 510146aad74SMarcel Moolenaar desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; 511146aad74SMarcel Moolenaar desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff); 512146aad74SMarcel Moolenaar desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; 513146aad74SMarcel Moolenaar desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | 514146aad74SMarcel Moolenaar (ld.contents << 2); 515146aad74SMarcel Moolenaar desc->sd.sd_dpl = 3; 516146aad74SMarcel Moolenaar desc->sd.sd_p = (ld.seg_not_present ^ 1); 517146aad74SMarcel Moolenaar desc->sd.sd_xx = 0; 518146aad74SMarcel Moolenaar desc->sd.sd_def32 = ld.seg_32bit; 519146aad74SMarcel Moolenaar desc->sd.sd_gran = ld.limit_in_pages; 520146aad74SMarcel Moolenaar args.op = I386_SET_LDT; 521146aad74SMarcel Moolenaar args.parms = (char*)ldt; 522146aad74SMarcel Moolenaar error = sysarch(p, &args); 523146aad74SMarcel Moolenaar break; 524146aad74SMarcel Moolenaar default: 525146aad74SMarcel Moolenaar error = EINVAL; 526146aad74SMarcel Moolenaar break; 527146aad74SMarcel Moolenaar } 528146aad74SMarcel Moolenaar 529146aad74SMarcel Moolenaar if (error == EOPNOTSUPP) { 530146aad74SMarcel Moolenaar printf("linux: modify_ldt needs kernel option USER_LDT\n"); 531146aad74SMarcel Moolenaar error = ENOSYS; 532146aad74SMarcel Moolenaar } 533146aad74SMarcel Moolenaar 534146aad74SMarcel Moolenaar return (error); 535146aad74SMarcel Moolenaar } 536146aad74SMarcel Moolenaar 537146aad74SMarcel Moolenaar int 538146aad74SMarcel Moolenaar linux_sigaction(struct proc *p, struct linux_sigaction_args *args) 539146aad74SMarcel Moolenaar { 540146aad74SMarcel Moolenaar linux_osigaction_t osa; 541146aad74SMarcel Moolenaar linux_sigaction_t act, oact; 542146aad74SMarcel Moolenaar int error; 543146aad74SMarcel Moolenaar 544146aad74SMarcel Moolenaar #ifdef DEBUG 545146aad74SMarcel Moolenaar printf("Linux-emul(%ld): sigaction(%d, %p, %p)\n", (long)p->p_pid, 546146aad74SMarcel Moolenaar args->sig, (void *)args->nsa, (void *)args->osa); 547146aad74SMarcel Moolenaar #endif 548146aad74SMarcel Moolenaar 549146aad74SMarcel Moolenaar if (args->nsa != NULL) { 550146aad74SMarcel Moolenaar error = copyin(args->nsa, &osa, sizeof(linux_osigaction_t)); 551146aad74SMarcel Moolenaar if (error) 552146aad74SMarcel Moolenaar return (error); 553146aad74SMarcel Moolenaar act.lsa_handler = osa.lsa_handler; 554146aad74SMarcel Moolenaar act.lsa_flags = osa.lsa_flags; 555146aad74SMarcel Moolenaar act.lsa_restorer = osa.lsa_restorer; 556146aad74SMarcel Moolenaar LINUX_SIGEMPTYSET(act.lsa_mask); 557146aad74SMarcel Moolenaar act.lsa_mask.__bits[0] = osa.lsa_mask; 558146aad74SMarcel Moolenaar } 559146aad74SMarcel Moolenaar 560146aad74SMarcel Moolenaar error = linux_do_sigaction(p, args->sig, args->nsa ? &act : NULL, 561146aad74SMarcel Moolenaar args->osa ? &oact : NULL); 562146aad74SMarcel Moolenaar 563146aad74SMarcel Moolenaar if (args->osa != NULL && !error) { 564146aad74SMarcel Moolenaar osa.lsa_handler = oact.lsa_handler; 565146aad74SMarcel Moolenaar osa.lsa_flags = oact.lsa_flags; 566146aad74SMarcel Moolenaar osa.lsa_restorer = oact.lsa_restorer; 567146aad74SMarcel Moolenaar osa.lsa_mask = oact.lsa_mask.__bits[0]; 568146aad74SMarcel Moolenaar error = copyout(&osa, args->osa, sizeof(linux_osigaction_t)); 569146aad74SMarcel Moolenaar } 570146aad74SMarcel Moolenaar 571146aad74SMarcel Moolenaar return (error); 572146aad74SMarcel Moolenaar } 573146aad74SMarcel Moolenaar 574146aad74SMarcel Moolenaar /* 575146aad74SMarcel Moolenaar * Linux has two extra args, restart and oldmask. We dont use these, 576146aad74SMarcel Moolenaar * but it seems that "restart" is actually a context pointer that 577146aad74SMarcel Moolenaar * enables the signal to happen with a different register set. 578146aad74SMarcel Moolenaar */ 579146aad74SMarcel Moolenaar int 580146aad74SMarcel Moolenaar linux_sigsuspend(struct proc *p, struct linux_sigsuspend_args *args) 581146aad74SMarcel Moolenaar { 582146aad74SMarcel Moolenaar struct sigsuspend_args bsd; 583146aad74SMarcel Moolenaar sigset_t *sigmask; 584146aad74SMarcel Moolenaar linux_sigset_t mask; 585146aad74SMarcel Moolenaar caddr_t sg = stackgap_init(); 586146aad74SMarcel Moolenaar 587146aad74SMarcel Moolenaar #ifdef DEBUG 588146aad74SMarcel Moolenaar printf("Linux-emul(%ld): sigsuspend(%08lx)\n", 589146aad74SMarcel Moolenaar (long)p->p_pid, (unsigned long)args->mask); 590146aad74SMarcel Moolenaar #endif 591146aad74SMarcel Moolenaar 592146aad74SMarcel Moolenaar sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); 593146aad74SMarcel Moolenaar LINUX_SIGEMPTYSET(mask); 594146aad74SMarcel Moolenaar mask.__bits[0] = args->mask; 595146aad74SMarcel Moolenaar linux_to_bsd_sigset(&mask, sigmask); 596146aad74SMarcel Moolenaar bsd.sigmask = sigmask; 597146aad74SMarcel Moolenaar return (sigsuspend(p, &bsd)); 598146aad74SMarcel Moolenaar } 599146aad74SMarcel Moolenaar 600146aad74SMarcel Moolenaar int 601146aad74SMarcel Moolenaar linux_rt_sigsuspend(p, uap) 602146aad74SMarcel Moolenaar struct proc *p; 603146aad74SMarcel Moolenaar struct linux_rt_sigsuspend_args *uap; 604146aad74SMarcel Moolenaar { 605146aad74SMarcel Moolenaar linux_sigset_t lmask; 606146aad74SMarcel Moolenaar sigset_t *bmask; 607146aad74SMarcel Moolenaar struct sigsuspend_args bsd; 608146aad74SMarcel Moolenaar caddr_t sg = stackgap_init(); 609146aad74SMarcel Moolenaar int error; 610146aad74SMarcel Moolenaar 611146aad74SMarcel Moolenaar #ifdef DEBUG 612146aad74SMarcel Moolenaar printf("Linux-emul(%ld): rt_sigsuspend(%p, %d)\n", (long)p->p_pid, 613146aad74SMarcel Moolenaar (void *)uap->newset, uap->sigsetsize); 614146aad74SMarcel Moolenaar #endif 615146aad74SMarcel Moolenaar 616146aad74SMarcel Moolenaar if (uap->sigsetsize != sizeof(linux_sigset_t)) 617146aad74SMarcel Moolenaar return (EINVAL); 618146aad74SMarcel Moolenaar 619146aad74SMarcel Moolenaar error = copyin(uap->newset, &lmask, sizeof(linux_sigset_t)); 620146aad74SMarcel Moolenaar if (error) 621146aad74SMarcel Moolenaar return (error); 622146aad74SMarcel Moolenaar 623146aad74SMarcel Moolenaar bmask = stackgap_alloc(&sg, sizeof(sigset_t)); 624146aad74SMarcel Moolenaar linux_to_bsd_sigset(&lmask, bmask); 625146aad74SMarcel Moolenaar bsd.sigmask = bmask; 626146aad74SMarcel Moolenaar return (sigsuspend(p, &bsd)); 627146aad74SMarcel Moolenaar } 628146aad74SMarcel Moolenaar 629146aad74SMarcel Moolenaar int 630146aad74SMarcel Moolenaar linux_pause(struct proc *p, struct linux_pause_args *args) 631146aad74SMarcel Moolenaar { 632146aad74SMarcel Moolenaar struct sigsuspend_args bsd; 633146aad74SMarcel Moolenaar sigset_t *sigmask; 634146aad74SMarcel Moolenaar caddr_t sg = stackgap_init(); 635146aad74SMarcel Moolenaar 636146aad74SMarcel Moolenaar #ifdef DEBUG 637146aad74SMarcel Moolenaar printf("Linux-emul(%d): pause()\n", p->p_pid); 638146aad74SMarcel Moolenaar #endif 639146aad74SMarcel Moolenaar 640146aad74SMarcel Moolenaar sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); 641146aad74SMarcel Moolenaar *sigmask = p->p_sigmask; 642146aad74SMarcel Moolenaar bsd.sigmask = sigmask; 643146aad74SMarcel Moolenaar return (sigsuspend(p, &bsd)); 644146aad74SMarcel Moolenaar } 645146aad74SMarcel Moolenaar 646146aad74SMarcel Moolenaar int 647146aad74SMarcel Moolenaar linux_sigaltstack(p, uap) 648146aad74SMarcel Moolenaar struct proc *p; 649146aad74SMarcel Moolenaar struct linux_sigaltstack_args *uap; 650146aad74SMarcel Moolenaar { 651146aad74SMarcel Moolenaar struct sigaltstack_args bsd; 652146aad74SMarcel Moolenaar stack_t *ss, *oss; 653146aad74SMarcel Moolenaar linux_stack_t lss; 654146aad74SMarcel Moolenaar int error; 655146aad74SMarcel Moolenaar caddr_t sg = stackgap_init(); 656146aad74SMarcel Moolenaar 657146aad74SMarcel Moolenaar #ifdef DEBUG 658146aad74SMarcel Moolenaar printf("Linux-emul(%ld): sigaltstack(%p, %p)\n", 659146aad74SMarcel Moolenaar (long)p->p_pid, uap->uss, uap->uoss); 660146aad74SMarcel Moolenaar #endif 661146aad74SMarcel Moolenaar 662931a7258SAndrew Gallatin if (uap->uss == NULL) { 663931a7258SAndrew Gallatin ss = NULL; 664931a7258SAndrew Gallatin } else { 665146aad74SMarcel Moolenaar error = copyin(uap->uss, &lss, sizeof(linux_stack_t)); 666146aad74SMarcel Moolenaar if (error) 667146aad74SMarcel Moolenaar return (error); 668146aad74SMarcel Moolenaar 669146aad74SMarcel Moolenaar ss = stackgap_alloc(&sg, sizeof(stack_t)); 670146aad74SMarcel Moolenaar ss->ss_sp = lss.ss_sp; 671806d7daaSMarcel Moolenaar ss->ss_size = lss.ss_size; 672931a7258SAndrew Gallatin ss->ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 673931a7258SAndrew Gallatin } 674146aad74SMarcel Moolenaar oss = (uap->uoss != NULL) 675146aad74SMarcel Moolenaar ? stackgap_alloc(&sg, sizeof(stack_t)) 676146aad74SMarcel Moolenaar : NULL; 677146aad74SMarcel Moolenaar 678146aad74SMarcel Moolenaar bsd.ss = ss; 679146aad74SMarcel Moolenaar bsd.oss = oss; 680146aad74SMarcel Moolenaar error = sigaltstack(p, &bsd); 681146aad74SMarcel Moolenaar 682146aad74SMarcel Moolenaar if (!error && oss != NULL) { 683146aad74SMarcel Moolenaar lss.ss_sp = oss->ss_sp; 684146aad74SMarcel Moolenaar lss.ss_size = oss->ss_size; 685931a7258SAndrew Gallatin lss.ss_flags = bsd_to_linux_sigaltstack(oss->ss_flags); 686146aad74SMarcel Moolenaar error = copyout(&lss, uap->uoss, sizeof(linux_stack_t)); 687146aad74SMarcel Moolenaar } 688146aad74SMarcel Moolenaar 689146aad74SMarcel Moolenaar return (error); 690146aad74SMarcel Moolenaar } 691