linux_machdep.c revision 104984
164921Smarcel/*- 264921Smarcel * Copyright (c) 2000 Marcel Moolenaar 364921Smarcel * All rights reserved. 464921Smarcel * 564921Smarcel * Redistribution and use in source and binary forms, with or without 664921Smarcel * modification, are permitted provided that the following conditions 764921Smarcel * are met: 864921Smarcel * 1. Redistributions of source code must retain the above copyright 964921Smarcel * notice, this list of conditions and the following disclaimer 1064921Smarcel * in this position and unchanged. 1164921Smarcel * 2. Redistributions in binary form must reproduce the above copyright 1264921Smarcel * notice, this list of conditions and the following disclaimer in the 1364921Smarcel * documentation and/or other materials provided with the distribution. 1464921Smarcel * 3. The name of the author may not be used to endorse or promote products 1565067Smarcel * derived from this software without specific prior written permission. 1664921Smarcel * 1764921Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1864921Smarcel * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1964921Smarcel * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2064921Smarcel * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2164921Smarcel * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2264921Smarcel * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2364921Smarcel * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2464921Smarcel * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2564921Smarcel * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2664921Smarcel * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2764921Smarcel * 2864921Smarcel * $FreeBSD: head/sys/i386/linux/linux_machdep.c 104984 2002-10-12 13:48:21Z bde $ 2964921Smarcel */ 3064921Smarcel 3164921Smarcel#include <sys/param.h> 3276166Smarkm#include <sys/systm.h> 3384811Sjhb#include <sys/lock.h> 3464921Smarcel#include <sys/mman.h> 3576166Smarkm#include <sys/mutex.h> 3664921Smarcel#include <sys/proc.h> 3776166Smarkm#include <sys/resource.h> 3876166Smarkm#include <sys/resourcevar.h> 39104984Sbde#include <sys/stdint.h> 40102814Siedowse#include <sys/syscallsubr.h> 4164921Smarcel#include <sys/sysproto.h> 4264921Smarcel#include <sys/unistd.h> 4364921Smarcel 4464921Smarcel#include <machine/frame.h> 4564921Smarcel#include <machine/psl.h> 4664921Smarcel#include <machine/segments.h> 4764921Smarcel#include <machine/sysarch.h> 4864921Smarcel 4967238Sgallatin#include <vm/vm.h> 5067238Sgallatin#include <vm/pmap.h> 5167238Sgallatin#include <vm/vm_map.h> 5267238Sgallatin 5364921Smarcel#include <i386/linux/linux.h> 5468583Smarcel#include <i386/linux/linux_proto.h> 5564921Smarcel#include <compat/linux/linux_ipc.h> 5664921Smarcel#include <compat/linux/linux_signal.h> 5764921Smarcel#include <compat/linux/linux_util.h> 5864921Smarcel 5983221Smarcelstruct l_descriptor { 6083221Smarcel l_uint entry_number; 6183221Smarcel l_ulong base_addr; 6283221Smarcel l_uint limit; 6383221Smarcel l_uint seg_32bit:1; 6483221Smarcel l_uint contents:2; 6583221Smarcel l_uint read_exec_only:1; 6683221Smarcel l_uint limit_in_pages:1; 6783221Smarcel l_uint seg_not_present:1; 6883221Smarcel l_uint useable:1; 6964921Smarcel}; 7064921Smarcel 7183221Smarcelstruct l_old_select_argv { 7283221Smarcel l_int nfds; 7383221Smarcel l_fd_set *readfds; 7483221Smarcel l_fd_set *writefds; 7583221Smarcel l_fd_set *exceptfds; 7683221Smarcel struct l_timeval *timeout; 7764921Smarcel}; 7864921Smarcel 7964921Smarcelint 8067051Sgallatinlinux_to_bsd_sigaltstack(int lsa) 8167051Sgallatin{ 8267051Sgallatin int bsa = 0; 8367051Sgallatin 8467051Sgallatin if (lsa & LINUX_SS_DISABLE) 8567051Sgallatin bsa |= SS_DISABLE; 8667051Sgallatin if (lsa & LINUX_SS_ONSTACK) 8767051Sgallatin bsa |= SS_ONSTACK; 8867051Sgallatin return (bsa); 8967051Sgallatin} 9067051Sgallatin 9167051Sgallatinint 9267051Sgallatinbsd_to_linux_sigaltstack(int bsa) 9367051Sgallatin{ 9467051Sgallatin int lsa = 0; 9567051Sgallatin 9667051Sgallatin if (bsa & SS_DISABLE) 9767051Sgallatin lsa |= LINUX_SS_DISABLE; 9867051Sgallatin if (bsa & SS_ONSTACK) 9967051Sgallatin lsa |= LINUX_SS_ONSTACK; 10067051Sgallatin return (lsa); 10167051Sgallatin} 10267051Sgallatin 10367051Sgallatinint 10483366Sjulianlinux_execve(struct thread *td, struct linux_execve_args *args) 10564921Smarcel{ 10664921Smarcel struct execve_args bsd; 10764921Smarcel caddr_t sg; 10864921Smarcel 10964921Smarcel sg = stackgap_init(); 11083366Sjulian CHECKALTEXIST(td, &sg, args->path); 11164921Smarcel 11264921Smarcel#ifdef DEBUG 11372543Sjlemon if (ldebug(execve)) 11472543Sjlemon printf(ARGS(execve, "%s"), args->path); 11564921Smarcel#endif 11664921Smarcel 11764921Smarcel bsd.fname = args->path; 11864921Smarcel bsd.argv = args->argp; 11964921Smarcel bsd.envv = args->envp; 12083366Sjulian return (execve(td, &bsd)); 12164921Smarcel} 12264921Smarcel 12383221Smarcelstruct l_ipc_kludge { 12483221Smarcel struct l_msgbuf *msgp; 12583221Smarcel l_long msgtyp; 12683221Smarcel}; 12783221Smarcel 12864921Smarcelint 12983366Sjulianlinux_ipc(struct thread *td, struct linux_ipc_args *args) 13064921Smarcel{ 13183221Smarcel 13283221Smarcel switch (args->what & 0xFFFF) { 13383221Smarcel case LINUX_SEMOP: { 13483221Smarcel struct linux_semop_args a; 13583221Smarcel 13683221Smarcel a.semid = args->arg1; 13783221Smarcel a.tsops = args->ptr; 13883221Smarcel a.nsops = args->arg2; 13983366Sjulian return (linux_semop(td, &a)); 14064921Smarcel } 14183221Smarcel case LINUX_SEMGET: { 14283221Smarcel struct linux_semget_args a; 14364921Smarcel 14483221Smarcel a.key = args->arg1; 14583221Smarcel a.nsems = args->arg2; 14683221Smarcel a.semflg = args->arg3; 14783366Sjulian return (linux_semget(td, &a)); 14883221Smarcel } 14983221Smarcel case LINUX_SEMCTL: { 15083221Smarcel struct linux_semctl_args a; 15183221Smarcel int error; 15283221Smarcel 15383221Smarcel a.semid = args->arg1; 15483221Smarcel a.semnum = args->arg2; 15583221Smarcel a.cmd = args->arg3; 15683221Smarcel error = copyin((caddr_t)args->ptr, &a.arg, sizeof(a.arg)); 15783221Smarcel if (error) 15883221Smarcel return (error); 15983366Sjulian return (linux_semctl(td, &a)); 16083221Smarcel } 16183221Smarcel case LINUX_MSGSND: { 16283221Smarcel struct linux_msgsnd_args a; 16383221Smarcel 16483221Smarcel a.msqid = args->arg1; 16583221Smarcel a.msgp = args->ptr; 16683221Smarcel a.msgsz = args->arg2; 16783221Smarcel a.msgflg = args->arg3; 16883366Sjulian return (linux_msgsnd(td, &a)); 16983221Smarcel } 17083221Smarcel case LINUX_MSGRCV: { 17183221Smarcel struct linux_msgrcv_args a; 17283221Smarcel 17383221Smarcel a.msqid = args->arg1; 17483221Smarcel a.msgsz = args->arg2; 17583221Smarcel a.msgflg = args->arg3; 17683221Smarcel if ((args->what >> 16) == 0) { 17783221Smarcel struct l_ipc_kludge tmp; 17883221Smarcel int error; 17983221Smarcel 18083221Smarcel if (args->ptr == NULL) 18183221Smarcel return (EINVAL); 18283221Smarcel error = copyin((caddr_t)args->ptr, &tmp, sizeof(tmp)); 18383221Smarcel if (error) 18483221Smarcel return (error); 18583221Smarcel a.msgp = tmp.msgp; 18683221Smarcel a.msgtyp = tmp.msgtyp; 18783221Smarcel } else { 18883221Smarcel a.msgp = args->ptr; 18983221Smarcel a.msgtyp = args->arg5; 19083221Smarcel } 19183366Sjulian return (linux_msgrcv(td, &a)); 19283221Smarcel } 19383221Smarcel case LINUX_MSGGET: { 19483221Smarcel struct linux_msgget_args a; 19583221Smarcel 19683221Smarcel a.key = args->arg1; 19783221Smarcel a.msgflg = args->arg2; 19883366Sjulian return (linux_msgget(td, &a)); 19983221Smarcel } 20083221Smarcel case LINUX_MSGCTL: { 20183221Smarcel struct linux_msgctl_args a; 20283221Smarcel 20383221Smarcel a.msqid = args->arg1; 20483221Smarcel a.cmd = args->arg2; 20583221Smarcel a.buf = args->ptr; 20683366Sjulian return (linux_msgctl(td, &a)); 20783221Smarcel } 20883221Smarcel case LINUX_SHMAT: { 20983221Smarcel struct linux_shmat_args a; 21083221Smarcel 21183221Smarcel a.shmid = args->arg1; 21283221Smarcel a.shmaddr = args->ptr; 21383221Smarcel a.shmflg = args->arg2; 21483221Smarcel a.raddr = (l_ulong *)args->arg3; 21583366Sjulian return (linux_shmat(td, &a)); 21683221Smarcel } 21783221Smarcel case LINUX_SHMDT: { 21883221Smarcel struct linux_shmdt_args a; 21983221Smarcel 22083221Smarcel a.shmaddr = args->ptr; 22183366Sjulian return (linux_shmdt(td, &a)); 22283221Smarcel } 22383221Smarcel case LINUX_SHMGET: { 22483221Smarcel struct linux_shmget_args a; 22583221Smarcel 22683221Smarcel a.key = args->arg1; 22783221Smarcel a.size = args->arg2; 22883221Smarcel a.shmflg = args->arg3; 22983366Sjulian return (linux_shmget(td, &a)); 23083221Smarcel } 23183221Smarcel case LINUX_SHMCTL: { 23283221Smarcel struct linux_shmctl_args a; 23383221Smarcel 23483221Smarcel a.shmid = args->arg1; 23583221Smarcel a.cmd = args->arg2; 23683221Smarcel a.buf = args->ptr; 23783366Sjulian return (linux_shmctl(td, &a)); 23883221Smarcel } 23983221Smarcel default: 24083221Smarcel break; 24183221Smarcel } 24283221Smarcel 24383221Smarcel return (EINVAL); 24464921Smarcel} 24564921Smarcel 24664921Smarcelint 24783366Sjulianlinux_old_select(struct thread *td, struct linux_old_select_args *args) 24864921Smarcel{ 24983221Smarcel struct l_old_select_argv linux_args; 25083221Smarcel struct linux_select_args newsel; 25164921Smarcel int error; 25264921Smarcel 25383221Smarcel#ifdef DEBUG 25483221Smarcel if (ldebug(old_select)) 25591437Speter printf(ARGS(old_select, "%p"), args->ptr); 25664921Smarcel#endif 25764921Smarcel 25883221Smarcel error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args)); 25964921Smarcel if (error) 26064921Smarcel return (error); 26164921Smarcel 26264921Smarcel newsel.nfds = linux_args.nfds; 26364921Smarcel newsel.readfds = linux_args.readfds; 26464921Smarcel newsel.writefds = linux_args.writefds; 26564921Smarcel newsel.exceptfds = linux_args.exceptfds; 26664921Smarcel newsel.timeout = linux_args.timeout; 26783366Sjulian return (linux_select(td, &newsel)); 26864921Smarcel} 26964921Smarcel 27064921Smarcelint 27183366Sjulianlinux_fork(struct thread *td, struct linux_fork_args *args) 27264921Smarcel{ 27364921Smarcel int error; 27464921Smarcel 27564921Smarcel#ifdef DEBUG 27672543Sjlemon if (ldebug(fork)) 27772543Sjlemon printf(ARGS(fork, "")); 27864921Smarcel#endif 27964921Smarcel 28083366Sjulian if ((error = fork(td, (struct fork_args *)args)) != 0) 28164921Smarcel return (error); 28264921Smarcel 28383366Sjulian if (td->td_retval[1] == 1) 28483366Sjulian td->td_retval[0] = 0; 28564921Smarcel return (0); 28664921Smarcel} 28764921Smarcel 28864921Smarcelint 28983366Sjulianlinux_vfork(struct thread *td, struct linux_vfork_args *args) 29064921Smarcel{ 29164921Smarcel int error; 29264921Smarcel 29364921Smarcel#ifdef DEBUG 29472543Sjlemon if (ldebug(vfork)) 29572543Sjlemon printf(ARGS(vfork, "")); 29664921Smarcel#endif 29764921Smarcel 29883366Sjulian if ((error = vfork(td, (struct vfork_args *)args)) != 0) 29964921Smarcel return (error); 30064921Smarcel /* Are we the child? */ 30183366Sjulian if (td->td_retval[1] == 1) 30283366Sjulian td->td_retval[0] = 0; 30364921Smarcel return (0); 30464921Smarcel} 30564921Smarcel 30664921Smarcel#define CLONE_VM 0x100 30764921Smarcel#define CLONE_FS 0x200 30864921Smarcel#define CLONE_FILES 0x400 30964921Smarcel#define CLONE_SIGHAND 0x800 31064921Smarcel#define CLONE_PID 0x1000 31164921Smarcel 31264921Smarcelint 31383366Sjulianlinux_clone(struct thread *td, struct linux_clone_args *args) 31464921Smarcel{ 31573856Sjhb int error, ff = RFPROC | RFSTOPPED; 31664921Smarcel struct proc *p2; 31764921Smarcel int exit_signal; 31864921Smarcel 31964921Smarcel#ifdef DEBUG 32072543Sjlemon if (ldebug(clone)) { 32172543Sjlemon printf(ARGS(clone, "flags %x, stack %x"), 32272543Sjlemon (unsigned int)args->flags, (unsigned int)args->stack); 32372543Sjlemon if (args->flags & CLONE_PID) 32472543Sjlemon printf(LMSG("CLONE_PID not yet supported")); 32572543Sjlemon } 32664921Smarcel#endif 32764921Smarcel 32864921Smarcel if (!args->stack) 32964921Smarcel return (EINVAL); 33064921Smarcel 33164921Smarcel exit_signal = args->flags & 0x000000ff; 33264921Smarcel if (exit_signal >= LINUX_NSIG) 33364921Smarcel return (EINVAL); 33464921Smarcel 33564921Smarcel if (exit_signal <= LINUX_SIGTBLSZ) 33664921Smarcel exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)]; 33764921Smarcel 33864921Smarcel if (args->flags & CLONE_VM) 33964921Smarcel ff |= RFMEM; 34064921Smarcel if (args->flags & CLONE_SIGHAND) 34164921Smarcel ff |= RFSIGSHARE; 34264921Smarcel if (!(args->flags & CLONE_FILES)) 34364921Smarcel ff |= RFFDG; 34464921Smarcel 34583221Smarcel mtx_lock(&Giant); 346104354Sscottl error = fork1(td, ff, 0, &p2); 34783221Smarcel if (error == 0) { 34883366Sjulian td->td_retval[0] = p2->p_pid; 34983366Sjulian td->td_retval[1] = 0; 35064921Smarcel 35183221Smarcel PROC_LOCK(p2); 35283221Smarcel p2->p_sigparent = exit_signal; 35390361Sjulian FIRST_THREAD_IN_PROC(p2)->td_frame->tf_esp = 35490361Sjulian (unsigned int)args->stack; 35564921Smarcel 35664921Smarcel#ifdef DEBUG 35783221Smarcel if (ldebug(clone)) 35883221Smarcel printf(LMSG("clone: successful rfork to %ld"), 35983221Smarcel (long)p2->p_pid); 36064921Smarcel#endif 36164921Smarcel 36283221Smarcel /* 36383221Smarcel * Make this runnable after we are finished with it. 36483221Smarcel */ 36583221Smarcel mtx_lock_spin(&sched_lock); 366103216Sjulian TD_SET_CAN_RUN(FIRST_THREAD_IN_PROC(p2)); 36790361Sjulian setrunqueue(FIRST_THREAD_IN_PROC(p2)); 36883221Smarcel mtx_unlock_spin(&sched_lock); 36983221Smarcel PROC_UNLOCK(p2); 37083221Smarcel } 37183221Smarcel mtx_unlock(&Giant); 37273856Sjhb 37383221Smarcel return (error); 37464921Smarcel} 37564921Smarcel 37664921Smarcel/* XXX move */ 37783221Smarcelstruct l_mmap_argv { 37883221Smarcel l_caddr_t addr; 37983221Smarcel l_int len; 38083221Smarcel l_int prot; 38183221Smarcel l_int flags; 38283221Smarcel l_int fd; 38383221Smarcel l_int pos; 38464921Smarcel}; 38564921Smarcel 38664921Smarcel#define STACK_SIZE (2 * 1024 * 1024) 38764921Smarcel#define GUARD_SIZE (4 * PAGE_SIZE) 38864921Smarcel 389104893Ssobomaxstatic int linux_mmap_common(struct thread *, struct l_mmap_argv *); 390104893Ssobomax 39164921Smarcelint 392104893Ssobomaxlinux_mmap2(struct thread *td, struct linux_mmap2_args *args) 393104893Ssobomax{ 394104893Ssobomax struct l_mmap_argv linux_args; 395104893Ssobomax 396104893Ssobomax#ifdef DEBUG 397104893Ssobomax if (ldebug(mmap2)) 398104893Ssobomax printf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"), 399104893Ssobomax (void *)args->addr, args->len, args->prot, 400104893Ssobomax args->flags, args->fd, args->pgoff); 401104893Ssobomax#endif 402104893Ssobomax 403104893Ssobomax linux_args.addr = (l_caddr_t)args->addr; 404104893Ssobomax linux_args.len = args->len; 405104893Ssobomax linux_args.prot = args->prot; 406104893Ssobomax linux_args.flags = args->flags; 407104893Ssobomax linux_args.fd = args->fd; 408104893Ssobomax linux_args.pos = args->pgoff * PAGE_SIZE; 409104893Ssobomax 410104893Ssobomax return (linux_mmap_common(td, &linux_args)); 411104893Ssobomax} 412104893Ssobomax 413104893Ssobomaxint 41483366Sjulianlinux_mmap(struct thread *td, struct linux_mmap_args *args) 41564921Smarcel{ 41664921Smarcel int error; 41783221Smarcel struct l_mmap_argv linux_args; 41864921Smarcel 41983221Smarcel error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args)); 42064921Smarcel if (error) 42164921Smarcel return (error); 42264921Smarcel 42364921Smarcel#ifdef DEBUG 42472543Sjlemon if (ldebug(mmap)) 42572543Sjlemon printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"), 426104984Sbde (void *)linux_args.addr, linux_args.len, linux_args.prot, 427104984Sbde linux_args.flags, linux_args.fd, linux_args.pos); 42864921Smarcel#endif 42964921Smarcel 430104893Ssobomax return (linux_mmap_common(td, &linux_args)); 431104893Ssobomax} 432104893Ssobomax 433104893Ssobomaxstatic int 434104893Ssobomaxlinux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args) 435104893Ssobomax{ 436104893Ssobomax struct proc *p = td->td_proc; 437104893Ssobomax struct mmap_args /* { 438104893Ssobomax caddr_t addr; 439104893Ssobomax size_t len; 440104893Ssobomax int prot; 441104893Ssobomax int flags; 442104893Ssobomax int fd; 443104893Ssobomax long pad; 444104893Ssobomax off_t pos; 445104893Ssobomax } */ bsd_args; 446104893Ssobomax 44764921Smarcel bsd_args.flags = 0; 448104893Ssobomax if (linux_args->flags & LINUX_MAP_SHARED) 44964921Smarcel bsd_args.flags |= MAP_SHARED; 450104893Ssobomax if (linux_args->flags & LINUX_MAP_PRIVATE) 45164921Smarcel bsd_args.flags |= MAP_PRIVATE; 452104893Ssobomax if (linux_args->flags & LINUX_MAP_FIXED) 45364921Smarcel bsd_args.flags |= MAP_FIXED; 454104893Ssobomax if (linux_args->flags & LINUX_MAP_ANON) 45564921Smarcel bsd_args.flags |= MAP_ANON; 45673213Sdillon else 45773213Sdillon bsd_args.flags |= MAP_NOSYNC; 458104893Ssobomax if (linux_args->flags & LINUX_MAP_GROWSDOWN) { 45964921Smarcel bsd_args.flags |= MAP_STACK; 46064921Smarcel 46164921Smarcel /* The linux MAP_GROWSDOWN option does not limit auto 46264921Smarcel * growth of the region. Linux mmap with this option 46364921Smarcel * takes as addr the inital BOS, and as len, the initial 46464921Smarcel * region size. It can then grow down from addr without 46564921Smarcel * limit. However, linux threads has an implicit internal 46664921Smarcel * limit to stack size of STACK_SIZE. Its just not 46764921Smarcel * enforced explicitly in linux. But, here we impose 46864921Smarcel * a limit of (STACK_SIZE - GUARD_SIZE) on the stack 46964921Smarcel * region, since we can do this with our mmap. 47064921Smarcel * 47164921Smarcel * Our mmap with MAP_STACK takes addr as the maximum 47264921Smarcel * downsize limit on BOS, and as len the max size of 47364921Smarcel * the region. It them maps the top SGROWSIZ bytes, 47464921Smarcel * and autgrows the region down, up to the limit 47564921Smarcel * in addr. 47664921Smarcel * 47764921Smarcel * If we don't use the MAP_STACK option, the effect 47864921Smarcel * of this code is to allocate a stack region of a 47964921Smarcel * fixed size of (STACK_SIZE - GUARD_SIZE). 48064921Smarcel */ 48164921Smarcel 48264921Smarcel /* This gives us TOS */ 483104893Ssobomax bsd_args.addr = linux_args->addr + linux_args->len; 48464921Smarcel 48567238Sgallatin if (bsd_args.addr > p->p_vmspace->vm_maxsaddr) { 48667238Sgallatin /* Some linux apps will attempt to mmap 48767238Sgallatin * thread stacks near the top of their 48867238Sgallatin * address space. If their TOS is greater 48967238Sgallatin * than vm_maxsaddr, vm_map_growstack() 49067238Sgallatin * will confuse the thread stack with the 49167238Sgallatin * process stack and deliver a SEGV if they 49267238Sgallatin * attempt to grow the thread stack past their 49367238Sgallatin * current stacksize rlimit. To avoid this, 49467238Sgallatin * adjust vm_maxsaddr upwards to reflect 49567238Sgallatin * the current stacksize rlimit rather 49667238Sgallatin * than the maximum possible stacksize. 49767238Sgallatin * It would be better to adjust the 49867238Sgallatin * mmap'ed region, but some apps do not check 49967238Sgallatin * mmap's return value. 50067238Sgallatin */ 50171494Sjhb mtx_assert(&Giant, MA_OWNED); 50267238Sgallatin p->p_vmspace->vm_maxsaddr = (char *)USRSTACK - 50367238Sgallatin p->p_rlimit[RLIMIT_STACK].rlim_cur; 50467238Sgallatin } 50567238Sgallatin 50664921Smarcel /* This gives us our maximum stack size */ 507104893Ssobomax if (linux_args->len > STACK_SIZE - GUARD_SIZE) 508104893Ssobomax bsd_args.len = linux_args->len; 50964921Smarcel else 51064921Smarcel bsd_args.len = STACK_SIZE - GUARD_SIZE; 51164921Smarcel 51264921Smarcel /* This gives us a new BOS. If we're using VM_STACK, then 51364921Smarcel * mmap will just map the top SGROWSIZ bytes, and let 51464921Smarcel * the stack grow down to the limit at BOS. If we're 51564921Smarcel * not using VM_STACK we map the full stack, since we 51664921Smarcel * don't have a way to autogrow it. 51764921Smarcel */ 51864921Smarcel bsd_args.addr -= bsd_args.len; 51964921Smarcel } else { 520104893Ssobomax bsd_args.addr = linux_args->addr; 521104893Ssobomax bsd_args.len = linux_args->len; 52264921Smarcel } 52364921Smarcel 524104893Ssobomax bsd_args.prot = linux_args->prot | PROT_READ; /* always required */ 525104893Ssobomax if (linux_args->flags & LINUX_MAP_ANON) 52664921Smarcel bsd_args.fd = -1; 52764921Smarcel else 528104893Ssobomax bsd_args.fd = linux_args->fd; 529104893Ssobomax bsd_args.pos = linux_args->pos; 53064921Smarcel bsd_args.pad = 0; 53164921Smarcel 53264921Smarcel#ifdef DEBUG 53372543Sjlemon if (ldebug(mmap)) 53472543Sjlemon printf("-> (%p, %d, %d, 0x%08x, %d, %d)\n", 53572543Sjlemon (void *)bsd_args.addr, bsd_args.len, bsd_args.prot, 53672543Sjlemon bsd_args.flags, bsd_args.fd, (int)bsd_args.pos); 53764921Smarcel#endif 53864921Smarcel 53983366Sjulian return (mmap(td, &bsd_args)); 54064921Smarcel} 54164921Smarcel 54264921Smarcelint 54383366Sjulianlinux_pipe(struct thread *td, struct linux_pipe_args *args) 54464921Smarcel{ 54564921Smarcel int error; 54664921Smarcel int reg_edx; 54764921Smarcel 54864921Smarcel#ifdef DEBUG 54972543Sjlemon if (ldebug(pipe)) 55072543Sjlemon printf(ARGS(pipe, "*")); 55164921Smarcel#endif 55264921Smarcel 55383366Sjulian reg_edx = td->td_retval[1]; 55483366Sjulian error = pipe(td, 0); 55564921Smarcel if (error) { 55683366Sjulian td->td_retval[1] = reg_edx; 55764921Smarcel return (error); 55864921Smarcel } 55964921Smarcel 56083366Sjulian error = copyout(td->td_retval, args->pipefds, 2*sizeof(int)); 56164921Smarcel if (error) { 56283366Sjulian td->td_retval[1] = reg_edx; 56364921Smarcel return (error); 56464921Smarcel } 56564921Smarcel 56683366Sjulian td->td_retval[1] = reg_edx; 56783366Sjulian td->td_retval[0] = 0; 56864921Smarcel return (0); 56964921Smarcel} 57064921Smarcel 57164921Smarcelint 57283366Sjulianlinux_ioperm(struct thread *td, struct linux_ioperm_args *args) 57364921Smarcel{ 57464921Smarcel struct sysarch_args sa; 57564921Smarcel struct i386_ioperm_args *iia; 57664921Smarcel caddr_t sg; 57764921Smarcel 57864921Smarcel sg = stackgap_init(); 57964921Smarcel iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args)); 58064921Smarcel iia->start = args->start; 58164921Smarcel iia->length = args->length; 58264921Smarcel iia->enable = args->enable; 58364921Smarcel sa.op = I386_SET_IOPERM; 58464921Smarcel sa.parms = (char *)iia; 58583366Sjulian return (sysarch(td, &sa)); 58664921Smarcel} 58764921Smarcel 58864921Smarcelint 58983366Sjulianlinux_iopl(struct thread *td, struct linux_iopl_args *args) 59064921Smarcel{ 59164921Smarcel int error; 59264921Smarcel 59364921Smarcel if (args->level < 0 || args->level > 3) 59464921Smarcel return (EINVAL); 59593593Sjhb if ((error = suser(td)) != 0) 59664921Smarcel return (error); 59791406Sjhb if ((error = securelevel_gt(td->td_ucred, 0)) != 0) 59883981Srwatson return (error); 59983366Sjulian td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) | 60064921Smarcel (args->level * (PSL_IOPL / 3)); 60164921Smarcel return (0); 60264921Smarcel} 60364921Smarcel 60464921Smarcelint 60583366Sjulianlinux_modify_ldt(td, uap) 60683366Sjulian struct thread *td; 60764921Smarcel struct linux_modify_ldt_args *uap; 60864921Smarcel{ 60964921Smarcel int error; 61064921Smarcel caddr_t sg; 61164921Smarcel struct sysarch_args args; 61264921Smarcel struct i386_ldt_args *ldt; 61383221Smarcel struct l_descriptor ld; 61464921Smarcel union descriptor *desc; 61564921Smarcel 61664921Smarcel sg = stackgap_init(); 61764921Smarcel 61864921Smarcel if (uap->ptr == NULL) 61964921Smarcel return (EINVAL); 62064921Smarcel 62164921Smarcel switch (uap->func) { 62264921Smarcel case 0x00: /* read_ldt */ 62364921Smarcel ldt = stackgap_alloc(&sg, sizeof(*ldt)); 62464921Smarcel ldt->start = 0; 62564921Smarcel ldt->descs = uap->ptr; 62664921Smarcel ldt->num = uap->bytecount / sizeof(union descriptor); 62764921Smarcel args.op = I386_GET_LDT; 62864921Smarcel args.parms = (char*)ldt; 62983366Sjulian error = sysarch(td, &args); 63083366Sjulian td->td_retval[0] *= sizeof(union descriptor); 63164921Smarcel break; 63264921Smarcel case 0x01: /* write_ldt */ 63364921Smarcel case 0x11: /* write_ldt */ 63464921Smarcel if (uap->bytecount != sizeof(ld)) 63564921Smarcel return (EINVAL); 63664921Smarcel 63764921Smarcel error = copyin(uap->ptr, &ld, sizeof(ld)); 63864921Smarcel if (error) 63964921Smarcel return (error); 64064921Smarcel 64164921Smarcel ldt = stackgap_alloc(&sg, sizeof(*ldt)); 64264921Smarcel desc = stackgap_alloc(&sg, sizeof(*desc)); 64364921Smarcel ldt->start = ld.entry_number; 64464921Smarcel ldt->descs = desc; 64564921Smarcel ldt->num = 1; 64664921Smarcel desc->sd.sd_lolimit = (ld.limit & 0x0000ffff); 64764921Smarcel desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; 64864921Smarcel desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff); 64964921Smarcel desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; 65064921Smarcel desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | 65164921Smarcel (ld.contents << 2); 65264921Smarcel desc->sd.sd_dpl = 3; 65364921Smarcel desc->sd.sd_p = (ld.seg_not_present ^ 1); 65464921Smarcel desc->sd.sd_xx = 0; 65564921Smarcel desc->sd.sd_def32 = ld.seg_32bit; 65664921Smarcel desc->sd.sd_gran = ld.limit_in_pages; 65764921Smarcel args.op = I386_SET_LDT; 65864921Smarcel args.parms = (char*)ldt; 65983366Sjulian error = sysarch(td, &args); 66064921Smarcel break; 66164921Smarcel default: 66264921Smarcel error = EINVAL; 66364921Smarcel break; 66464921Smarcel } 66564921Smarcel 66664921Smarcel if (error == EOPNOTSUPP) { 66764921Smarcel printf("linux: modify_ldt needs kernel option USER_LDT\n"); 66864921Smarcel error = ENOSYS; 66964921Smarcel } 67064921Smarcel 67164921Smarcel return (error); 67264921Smarcel} 67364921Smarcel 67464921Smarcelint 67583366Sjulianlinux_sigaction(struct thread *td, struct linux_sigaction_args *args) 67664921Smarcel{ 67783221Smarcel l_osigaction_t osa; 67883221Smarcel l_sigaction_t act, oact; 67964921Smarcel int error; 68064921Smarcel 68164921Smarcel#ifdef DEBUG 68272543Sjlemon if (ldebug(sigaction)) 68372543Sjlemon printf(ARGS(sigaction, "%d, %p, %p"), 68472543Sjlemon args->sig, (void *)args->nsa, (void *)args->osa); 68564921Smarcel#endif 68664921Smarcel 68764921Smarcel if (args->nsa != NULL) { 68883221Smarcel error = copyin((caddr_t)args->nsa, &osa, 68983221Smarcel sizeof(l_osigaction_t)); 69064921Smarcel if (error) 69164921Smarcel return (error); 69264921Smarcel act.lsa_handler = osa.lsa_handler; 69364921Smarcel act.lsa_flags = osa.lsa_flags; 69464921Smarcel act.lsa_restorer = osa.lsa_restorer; 69564921Smarcel LINUX_SIGEMPTYSET(act.lsa_mask); 69664921Smarcel act.lsa_mask.__bits[0] = osa.lsa_mask; 69764921Smarcel } 69864921Smarcel 69983366Sjulian error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, 70064921Smarcel args->osa ? &oact : NULL); 70164921Smarcel 70264921Smarcel if (args->osa != NULL && !error) { 70364921Smarcel osa.lsa_handler = oact.lsa_handler; 70464921Smarcel osa.lsa_flags = oact.lsa_flags; 70564921Smarcel osa.lsa_restorer = oact.lsa_restorer; 70664921Smarcel osa.lsa_mask = oact.lsa_mask.__bits[0]; 70783221Smarcel error = copyout(&osa, (caddr_t)args->osa, 70883221Smarcel sizeof(l_osigaction_t)); 70964921Smarcel } 71064921Smarcel 71164921Smarcel return (error); 71264921Smarcel} 71364921Smarcel 71464921Smarcel/* 71564921Smarcel * Linux has two extra args, restart and oldmask. We dont use these, 71664921Smarcel * but it seems that "restart" is actually a context pointer that 71764921Smarcel * enables the signal to happen with a different register set. 71864921Smarcel */ 71964921Smarcelint 72083366Sjulianlinux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) 72164921Smarcel{ 722102814Siedowse sigset_t sigmask; 72383221Smarcel l_sigset_t mask; 72464921Smarcel 72564921Smarcel#ifdef DEBUG 72672543Sjlemon if (ldebug(sigsuspend)) 72772543Sjlemon printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask); 72864921Smarcel#endif 72964921Smarcel 73064921Smarcel LINUX_SIGEMPTYSET(mask); 73164921Smarcel mask.__bits[0] = args->mask; 732102814Siedowse linux_to_bsd_sigset(&mask, &sigmask); 733102814Siedowse return (kern_sigsuspend(td, sigmask)); 73464921Smarcel} 73564921Smarcel 73664921Smarcelint 73783366Sjulianlinux_rt_sigsuspend(td, uap) 73883366Sjulian struct thread *td; 73964921Smarcel struct linux_rt_sigsuspend_args *uap; 74064921Smarcel{ 74183221Smarcel l_sigset_t lmask; 742102814Siedowse sigset_t sigmask; 74364921Smarcel int error; 74464921Smarcel 74564921Smarcel#ifdef DEBUG 74672543Sjlemon if (ldebug(rt_sigsuspend)) 74772543Sjlemon printf(ARGS(rt_sigsuspend, "%p, %d"), 74872543Sjlemon (void *)uap->newset, uap->sigsetsize); 74964921Smarcel#endif 75064921Smarcel 75183221Smarcel if (uap->sigsetsize != sizeof(l_sigset_t)) 75264921Smarcel return (EINVAL); 75364921Smarcel 75483221Smarcel error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 75564921Smarcel if (error) 75664921Smarcel return (error); 75764921Smarcel 758102814Siedowse linux_to_bsd_sigset(&lmask, &sigmask); 759102814Siedowse return (kern_sigsuspend(td, sigmask)); 76064921Smarcel} 76164921Smarcel 76264921Smarcelint 76383366Sjulianlinux_pause(struct thread *td, struct linux_pause_args *args) 76464921Smarcel{ 76583366Sjulian struct proc *p = td->td_proc; 766102814Siedowse sigset_t sigmask; 76764921Smarcel 76864921Smarcel#ifdef DEBUG 76972543Sjlemon if (ldebug(pause)) 77072543Sjlemon printf(ARGS(pause, "")); 77164921Smarcel#endif 77264921Smarcel 77371494Sjhb PROC_LOCK(p); 774102814Siedowse sigmask = p->p_sigmask; 77571494Sjhb PROC_UNLOCK(p); 776102814Siedowse return (kern_sigsuspend(td, sigmask)); 77764921Smarcel} 77864921Smarcel 77964921Smarcelint 78083366Sjulianlinux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 78164921Smarcel{ 782102814Siedowse stack_t ss, oss; 78383221Smarcel l_stack_t lss; 78464921Smarcel int error; 78564921Smarcel 78664921Smarcel#ifdef DEBUG 78772543Sjlemon if (ldebug(sigaltstack)) 78872543Sjlemon printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss); 78964921Smarcel#endif 79064921Smarcel 791102814Siedowse if (uap->uss != NULL) { 79283221Smarcel error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 79367051Sgallatin if (error) 79467051Sgallatin return (error); 79564921Smarcel 796102814Siedowse ss.ss_sp = lss.ss_sp; 797102814Siedowse ss.ss_size = lss.ss_size; 798102814Siedowse ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 79967051Sgallatin } 800102814Siedowse error = kern_sigaltstack(td, (uap->uoss != NULL) ? &oss : NULL, 801102814Siedowse (uap->uss != NULL) ? &ss : NULL); 802102814Siedowse if (!error && uap->uoss != NULL) { 803102814Siedowse lss.ss_sp = oss.ss_sp; 804102814Siedowse lss.ss_size = oss.ss_size; 805102814Siedowse lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); 80683221Smarcel error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 80764921Smarcel } 80864921Smarcel 80964921Smarcel return (error); 81064921Smarcel} 811104893Ssobomax 812104893Ssobomaxint 813104893Ssobomaxlinux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args) 814104893Ssobomax{ 815104893Ssobomax struct ftruncate_args sa; 816104893Ssobomax 817104893Ssobomax#ifdef DEBUG 818104893Ssobomax if (ldebug(ftruncate64)) 819104984Sbde printf(ARGS(ftruncate64, "%u, %jd"), args->fd, 820104984Sbde (intmax_t)args->length); 821104893Ssobomax#endif 822104893Ssobomax 823104893Ssobomax sa.fd = args->fd; 824104893Ssobomax sa.pad = 0; 825104893Ssobomax sa.length = args->length; 826104893Ssobomax return ftruncate(td, &sa); 827104893Ssobomax} 828