diff options
Diffstat (limited to 'sys/amd64/linux32/linux32_machdep.c')
| -rw-r--r-- | sys/amd64/linux32/linux32_machdep.c | 1367 |
1 files changed, 1367 insertions, 0 deletions
diff --git a/sys/amd64/linux32/linux32_machdep.c b/sys/amd64/linux32/linux32_machdep.c new file mode 100644 index 000000000000..42ea0700f8b6 --- /dev/null +++ b/sys/amd64/linux32/linux32_machdep.c @@ -0,0 +1,1367 @@ +/*- + * Copyright (c) 2004 Tim J. Robbins + * Copyright (c) 2002 Doug Rabson + * Copyright (c) 2000 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/systm.h> +#include <sys/file.h> +#include <sys/fcntl.h> +#include <sys/clock.h> +#include <sys/imgact.h> +#include <sys/limits.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/mman.h> +#include <sys/mutex.h> +#include <sys/priv.h> +#include <sys/proc.h> +#include <sys/resource.h> +#include <sys/resourcevar.h> +#include <sys/sched.h> +#include <sys/syscallsubr.h> +#include <sys/sysproto.h> +#include <sys/unistd.h> + +#include <machine/frame.h> +#include <machine/pcb.h> +#include <machine/psl.h> +#include <machine/segments.h> +#include <machine/specialreg.h> + +#include <vm/vm.h> +#include <vm/pmap.h> +#include <vm/vm_extern.h> +#include <vm/vm_kern.h> +#include <vm/vm_map.h> + +#include <amd64/linux32/linux.h> +#include <amd64/linux32/linux32_proto.h> +#include <compat/linux/linux_ipc.h> +#include <compat/linux/linux_signal.h> +#include <compat/linux/linux_util.h> +#include <compat/linux/linux_emul.h> + +struct l_old_select_argv { + l_int nfds; + l_uintptr_t readfds; + l_uintptr_t writefds; + l_uintptr_t exceptfds; + l_uintptr_t timeout; +} __packed; + +int +linux_to_bsd_sigaltstack(int lsa) +{ + int bsa = 0; + + if (lsa & LINUX_SS_DISABLE) + bsa |= SS_DISABLE; + if (lsa & LINUX_SS_ONSTACK) + bsa |= SS_ONSTACK; + return (bsa); +} + +int +bsd_to_linux_sigaltstack(int bsa) +{ + int lsa = 0; + + if (bsa & SS_DISABLE) + lsa |= LINUX_SS_DISABLE; + if (bsa & SS_ONSTACK) + lsa |= LINUX_SS_ONSTACK; + return (lsa); +} + +/* + * Custom version of exec_copyin_args() so that we can translate + * the pointers. + */ +static int +linux_exec_copyin_args(struct image_args *args, char *fname, + enum uio_seg segflg, char **argv, char **envv) +{ + char *argp, *envp; + u_int32_t *p32, arg; + size_t length; + int error; + + bzero(args, sizeof(*args)); + if (argv == NULL) + return (EFAULT); + + /* + * Allocate temporary demand zeroed space for argument and + * environment strings + */ + args->buf = (char *)kmem_alloc_wait(exec_map, + PATH_MAX + ARG_MAX + MAXSHELLCMDLEN); + if (args->buf == NULL) + return (ENOMEM); + args->begin_argv = args->buf; + args->endp = args->begin_argv; + args->stringspace = ARG_MAX; + + args->fname = args->buf + ARG_MAX; + + /* + * Copy the file name. + */ + error = (segflg == UIO_SYSSPACE) ? + copystr(fname, args->fname, PATH_MAX, &length) : + copyinstr(fname, args->fname, PATH_MAX, &length); + if (error != 0) + goto err_exit; + + /* + * extract arguments first + */ + p32 = (u_int32_t *)argv; + for (;;) { + error = copyin(p32++, &arg, sizeof(arg)); + if (error) + goto err_exit; + if (arg == 0) + break; + argp = PTRIN(arg); + error = copyinstr(argp, args->endp, args->stringspace, &length); + if (error) { + if (error == ENAMETOOLONG) + error = E2BIG; + + goto err_exit; + } + args->stringspace -= length; + args->endp += length; + args->argc++; + } + + args->begin_envv = args->endp; + + /* + * extract environment strings + */ + if (envv) { + p32 = (u_int32_t *)envv; + for (;;) { + error = copyin(p32++, &arg, sizeof(arg)); + if (error) + goto err_exit; + if (arg == 0) + break; + envp = PTRIN(arg); + error = copyinstr(envp, args->endp, args->stringspace, + &length); + if (error) { + if (error == ENAMETOOLONG) + error = E2BIG; + goto err_exit; + } + args->stringspace -= length; + args->endp += length; + args->envc++; + } + } + + return (0); + +err_exit: + kmem_free_wakeup(exec_map, (vm_offset_t)args->buf, + PATH_MAX + ARG_MAX + MAXSHELLCMDLEN); + args->buf = NULL; + return (error); +} + +int +linux_execve(struct thread *td, struct linux_execve_args *args) +{ + struct image_args eargs; + char *path; + int error; + + LCONVPATHEXIST(td, args->path, &path); + +#ifdef DEBUG + if (ldebug(execve)) + printf(ARGS(execve, "%s"), path); +#endif + + error = linux_exec_copyin_args(&eargs, path, UIO_SYSSPACE, args->argp, + args->envp); + free(path, M_TEMP); + if (error == 0) + error = kern_execve(td, &eargs, NULL); + if (error == 0) + /* Linux process can execute FreeBSD one, do not attempt + * to create emuldata for such process using + * linux_proc_init, this leads to a panic on KASSERT + * because such process has p->p_emuldata == NULL. + */ + if (td->td_proc->p_sysent == &elf_linux_sysvec) + error = linux_proc_init(td, 0, 0); + return (error); +} + +CTASSERT(sizeof(struct l_iovec32) == 8); + +static int +linux32_copyinuio(struct l_iovec32 *iovp, l_ulong iovcnt, struct uio **uiop) +{ + struct l_iovec32 iov32; + struct iovec *iov; + struct uio *uio; + uint32_t iovlen; + int error, i; + + *uiop = NULL; + if (iovcnt > UIO_MAXIOV) + return (EINVAL); + iovlen = iovcnt * sizeof(struct iovec); + uio = malloc(iovlen + sizeof(*uio), M_IOV, M_WAITOK); + iov = (struct iovec *)(uio + 1); + for (i = 0; i < iovcnt; i++) { + error = copyin(&iovp[i], &iov32, sizeof(struct l_iovec32)); + if (error) { + free(uio, M_IOV); + return (error); + } + iov[i].iov_base = PTRIN(iov32.iov_base); + iov[i].iov_len = iov32.iov_len; + } + uio->uio_iov = iov; + uio->uio_iovcnt = iovcnt; + uio->uio_segflg = UIO_USERSPACE; + uio->uio_offset = -1; + uio->uio_resid = 0; + for (i = 0; i < iovcnt; i++) { + if (iov->iov_len > INT_MAX - uio->uio_resid) { + free(uio, M_IOV); + return (EINVAL); + } + uio->uio_resid += iov->iov_len; + iov++; + } + *uiop = uio; + return (0); +} + +int +linux32_copyiniov(struct l_iovec32 *iovp32, l_ulong iovcnt, struct iovec **iovp, + int error) +{ + struct l_iovec32 iov32; + struct iovec *iov; + uint32_t iovlen; + int i; + + *iovp = NULL; + if (iovcnt > UIO_MAXIOV) + return (error); + iovlen = iovcnt * sizeof(struct iovec); + iov = malloc(iovlen, M_IOV, M_WAITOK); + for (i = 0; i < iovcnt; i++) { + error = copyin(&iovp32[i], &iov32, sizeof(struct l_iovec32)); + if (error) { + free(iov, M_IOV); + return (error); + } + iov[i].iov_base = PTRIN(iov32.iov_base); + iov[i].iov_len = iov32.iov_len; + } + *iovp = iov; + return(0); + +} + +int +linux_readv(struct thread *td, struct linux_readv_args *uap) +{ + struct uio *auio; + int error; + + error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio); + if (error) + return (error); + error = kern_readv(td, uap->fd, auio); + free(auio, M_IOV); + return (error); +} + +int +linux_writev(struct thread *td, struct linux_writev_args *uap) +{ + struct uio *auio; + int error; + + error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio); + if (error) + return (error); + error = kern_writev(td, uap->fd, auio); + free(auio, M_IOV); + return (error); +} + +struct l_ipc_kludge { + l_uintptr_t msgp; + l_long msgtyp; +} __packed; + +int +linux_ipc(struct thread *td, struct linux_ipc_args *args) +{ + + switch (args->what & 0xFFFF) { + case LINUX_SEMOP: { + struct linux_semop_args a; + + a.semid = args->arg1; + a.tsops = args->ptr; + a.nsops = args->arg2; + return (linux_semop(td, &a)); + } + case LINUX_SEMGET: { + struct linux_semget_args a; + + a.key = args->arg1; + a.nsems = args->arg2; + a.semflg = args->arg3; + return (linux_semget(td, &a)); + } + case LINUX_SEMCTL: { + struct linux_semctl_args a; + int error; + + a.semid = args->arg1; + a.semnum = args->arg2; + a.cmd = args->arg3; + error = copyin(args->ptr, &a.arg, sizeof(a.arg)); + if (error) + return (error); + return (linux_semctl(td, &a)); + } + case LINUX_MSGSND: { + struct linux_msgsnd_args a; + + a.msqid = args->arg1; + a.msgp = args->ptr; + a.msgsz = args->arg2; + a.msgflg = args->arg3; + return (linux_msgsnd(td, &a)); + } + case LINUX_MSGRCV: { + struct linux_msgrcv_args a; + + a.msqid = args->arg1; + a.msgsz = args->arg2; + a.msgflg = args->arg3; + if ((args->what >> 16) == 0) { + struct l_ipc_kludge tmp; + int error; + + if (args->ptr == 0) + return (EINVAL); + error = copyin(args->ptr, &tmp, sizeof(tmp)); + if (error) + return (error); + a.msgp = PTRIN(tmp.msgp); + a.msgtyp = tmp.msgtyp; + } else { + a.msgp = args->ptr; + a.msgtyp = args->arg5; + } + return (linux_msgrcv(td, &a)); + } + case LINUX_MSGGET: { + struct linux_msgget_args a; + + a.key = args->arg1; + a.msgflg = args->arg2; + return (linux_msgget(td, &a)); + } + case LINUX_MSGCTL: { + struct linux_msgctl_args a; + + a.msqid = args->arg1; + a.cmd = args->arg2; + a.buf = args->ptr; + return (linux_msgctl(td, &a)); + } + case LINUX_SHMAT: { + struct linux_shmat_args a; + + a.shmid = args->arg1; + a.shmaddr = args->ptr; + a.shmflg = args->arg2; + a.raddr = PTRIN((l_uint)args->arg3); + return (linux_shmat(td, &a)); + } + case LINUX_SHMDT: { + struct linux_shmdt_args a; + + a.shmaddr = args->ptr; + return (linux_shmdt(td, &a)); + } + case LINUX_SHMGET: { + struct linux_shmget_args a; + + a.key = args->arg1; + a.size = args->arg2; + a.shmflg = args->arg3; + return (linux_shmget(td, &a)); + } + case LINUX_SHMCTL: { + struct linux_shmctl_args a; + + a.shmid = args->arg1; + a.cmd = args->arg2; + a.buf = args->ptr; + return (linux_shmctl(td, &a)); + } + default: + break; + } + + return (EINVAL); +} + +int +linux_old_select(struct thread *td, struct linux_old_select_args *args) +{ + struct l_old_select_argv linux_args; + struct linux_select_args newsel; + int error; + +#ifdef DEBUG + if (ldebug(old_select)) + printf(ARGS(old_select, "%p"), args->ptr); +#endif + + error = copyin(args->ptr, &linux_args, sizeof(linux_args)); + if (error) + return (error); + + newsel.nfds = linux_args.nfds; + newsel.readfds = PTRIN(linux_args.readfds); + newsel.writefds = PTRIN(linux_args.writefds); + newsel.exceptfds = PTRIN(linux_args.exceptfds); + newsel.timeout = PTRIN(linux_args.timeout); + return (linux_select(td, &newsel)); +} + +int +linux_fork(struct thread *td, struct linux_fork_args *args) +{ + int error; + struct proc *p2; + struct thread *td2; + +#ifdef DEBUG + if (ldebug(fork)) + printf(ARGS(fork, "")); +#endif + + if ((error = fork1(td, RFFDG | RFPROC | RFSTOPPED, 0, &p2)) != 0) + return (error); + + if (error == 0) { + td->td_retval[0] = p2->p_pid; + td->td_retval[1] = 0; + } + + if (td->td_retval[1] == 1) + td->td_retval[0] = 0; + error = linux_proc_init(td, td->td_retval[0], 0); + if (error) + return (error); + + td2 = FIRST_THREAD_IN_PROC(p2); + + /* + * Make this runnable after we are finished with it. + */ + thread_lock(td2); + TD_SET_CAN_RUN(td2); + sched_add(td2, SRQ_BORING); + thread_unlock(td2); + + return (0); +} + +int +linux_vfork(struct thread *td, struct linux_vfork_args *args) +{ + int error; + struct proc *p2; + struct thread *td2; + +#ifdef DEBUG + if (ldebug(vfork)) + printf(ARGS(vfork, "")); +#endif + + /* Exclude RFPPWAIT */ + if ((error = fork1(td, RFFDG | RFPROC | RFMEM | RFSTOPPED, 0, &p2)) != 0) + return (error); + if (error == 0) { + td->td_retval[0] = p2->p_pid; + td->td_retval[1] = 0; + } + /* Are we the child? */ + if (td->td_retval[1] == 1) + td->td_retval[0] = 0; + error = linux_proc_init(td, td->td_retval[0], 0); + if (error) + return (error); + + PROC_LOCK(p2); + p2->p_flag |= P_PPWAIT; + PROC_UNLOCK(p2); + + td2 = FIRST_THREAD_IN_PROC(p2); + + /* + * Make this runnable after we are finished with it. + */ + thread_lock(td2); + TD_SET_CAN_RUN(td2); + sched_add(td2, SRQ_BORING); + thread_unlock(td2); + + /* wait for the children to exit, ie. emulate vfork */ + PROC_LOCK(p2); + while (p2->p_flag & P_PPWAIT) + cv_wait(&p2->p_pwait, &p2->p_mtx); + PROC_UNLOCK(p2); + + return (0); +} + +int +linux_clone(struct thread *td, struct linux_clone_args *args) +{ + int error, ff = RFPROC | RFSTOPPED; + struct proc *p2; + struct thread *td2; + int exit_signal; + struct linux_emuldata *em; + +#ifdef DEBUG + if (ldebug(clone)) { + printf(ARGS(clone, "flags %x, stack %p, parent tid: %p, " + "child tid: %p"), (unsigned)args->flags, + args->stack, args->parent_tidptr, args->child_tidptr); + } +#endif + + exit_signal = args->flags & 0x000000ff; + if (LINUX_SIG_VALID(exit_signal)) { + if (exit_signal <= LINUX_SIGTBLSZ) + exit_signal = + linux_to_bsd_signal[_SIG_IDX(exit_signal)]; + } else if (exit_signal != 0) + return (EINVAL); + + if (args->flags & LINUX_CLONE_VM) + ff |= RFMEM; + if (args->flags & LINUX_CLONE_SIGHAND) + ff |= RFSIGSHARE; + /* + * XXX: In Linux, sharing of fs info (chroot/cwd/umask) + * and open files is independant. In FreeBSD, its in one + * structure but in reality it does not cause any problems + * because both of these flags are usually set together. + */ + if (!(args->flags & (LINUX_CLONE_FILES | LINUX_CLONE_FS))) + ff |= RFFDG; + + /* + * Attempt to detect when linux_clone(2) is used for creating + * kernel threads. Unfortunately despite the existence of the + * CLONE_THREAD flag, version of linuxthreads package used in + * most popular distros as of beginning of 2005 doesn't make + * any use of it. Therefore, this detection relies on + * empirical observation that linuxthreads sets certain + * combination of flags, so that we can make more or less + * precise detection and notify the FreeBSD kernel that several + * processes are in fact part of the same threading group, so + * that special treatment is necessary for signal delivery + * between those processes and fd locking. + */ + if ((args->flags & 0xffffff00) == LINUX_THREADING_FLAGS) + ff |= RFTHREAD; + + if (args->flags & LINUX_CLONE_PARENT_SETTID) + if (args->parent_tidptr == NULL) + return (EINVAL); + + error = fork1(td, ff, 0, &p2); + if (error) + return (error); + + if (args->flags & (LINUX_CLONE_PARENT | LINUX_CLONE_THREAD)) { + sx_xlock(&proctree_lock); + PROC_LOCK(p2); + proc_reparent(p2, td->td_proc->p_pptr); + PROC_UNLOCK(p2); + sx_xunlock(&proctree_lock); + } + + /* create the emuldata */ + error = linux_proc_init(td, p2->p_pid, args->flags); + /* reference it - no need to check this */ + em = em_find(p2, EMUL_DOLOCK); + KASSERT(em != NULL, ("clone: emuldata not found.\n")); + /* and adjust it */ + + if (args->flags & LINUX_CLONE_THREAD) { +#ifdef notyet + PROC_LOCK(p2); + p2->p_pgrp = td->td_proc->p_pgrp; + PROC_UNLOCK(p2); +#endif + exit_signal = 0; + } + + if (args->flags & LINUX_CLONE_CHILD_SETTID) + em->child_set_tid = args->child_tidptr; + else + em->child_set_tid = NULL; + + if (args->flags & LINUX_CLONE_CHILD_CLEARTID) + em->child_clear_tid = args->child_tidptr; + else + em->child_clear_tid = NULL; + + EMUL_UNLOCK(&emul_lock); + + if (args->flags & LINUX_CLONE_PARENT_SETTID) { + error = copyout(&p2->p_pid, args->parent_tidptr, + sizeof(p2->p_pid)); + if (error) + printf(LMSG("copyout failed!")); + } + + PROC_LOCK(p2); + p2->p_sigparent = exit_signal; + PROC_UNLOCK(p2); + td2 = FIRST_THREAD_IN_PROC(p2); + /* + * In a case of stack = NULL, we are supposed to COW calling process + * stack. This is what normal fork() does, so we just keep tf_rsp arg + * intact. + */ + if (args->stack) + td2->td_frame->tf_rsp = PTROUT(args->stack); + + if (args->flags & LINUX_CLONE_SETTLS) { + struct user_segment_descriptor sd; + struct l_user_desc info; + int a[2]; + + error = copyin((void *)td->td_frame->tf_rsi, &info, + sizeof(struct l_user_desc)); + if (error) { + printf(LMSG("copyin failed!")); + } else { + /* We might copy out the entry_number as GUGS32_SEL. */ + info.entry_number = GUGS32_SEL; + error = copyout(&info, (void *)td->td_frame->tf_rsi, + sizeof(struct l_user_desc)); + if (error) + printf(LMSG("copyout failed!")); + + a[0] = LINUX_LDT_entry_a(&info); + a[1] = LINUX_LDT_entry_b(&info); + + memcpy(&sd, &a, sizeof(a)); +#ifdef DEBUG + if (ldebug(clone)) + printf("Segment created in clone with " + "CLONE_SETTLS: lobase: %x, hibase: %x, " + "lolimit: %x, hilimit: %x, type: %i, " + "dpl: %i, p: %i, xx: %i, long: %i, " + "def32: %i, gran: %i\n", sd.sd_lobase, + sd.sd_hibase, sd.sd_lolimit, sd.sd_hilimit, + sd.sd_type, sd.sd_dpl, sd.sd_p, sd.sd_xx, + sd.sd_long, sd.sd_def32, sd.sd_gran); +#endif + td2->td_pcb->pcb_gsbase = (register_t)info.base_addr; +/* XXXKIB td2->td_pcb->pcb_gs32sd = sd; */ + td2->td_frame->tf_gs = GSEL(GUGS32_SEL, SEL_UPL); + td2->td_pcb->pcb_flags |= PCB_GS32BIT | PCB_32BIT; + } + } + +#ifdef DEBUG + if (ldebug(clone)) + printf(LMSG("clone: successful rfork to %d, " + "stack %p sig = %d"), (int)p2->p_pid, args->stack, + exit_signal); +#endif + if (args->flags & LINUX_CLONE_VFORK) { + PROC_LOCK(p2); + p2->p_flag |= P_PPWAIT; + PROC_UNLOCK(p2); + } + + /* + * Make this runnable after we are finished with it. + */ + thread_lock(td2); + TD_SET_CAN_RUN(td2); + sched_add(td2, SRQ_BORING); + thread_unlock(td2); + + td->td_retval[0] = p2->p_pid; + td->td_retval[1] = 0; + + if (args->flags & LINUX_CLONE_VFORK) { + /* wait for the children to exit, ie. emulate vfork */ + PROC_LOCK(p2); + while (p2->p_flag & P_PPWAIT) + cv_wait(&p2->p_pwait, &p2->p_mtx); + PROC_UNLOCK(p2); + } + + return (0); +} + +#define STACK_SIZE (2 * 1024 * 1024) +#define GUARD_SIZE (4 * PAGE_SIZE) + +static int linux_mmap_common(struct thread *, struct l_mmap_argv *); + +int +linux_mmap2(struct thread *td, struct linux_mmap2_args *args) +{ + struct l_mmap_argv linux_args; + +#ifdef DEBUG + if (ldebug(mmap2)) + printf(ARGS(mmap2, "0x%08x, %d, %d, 0x%08x, %d, %d"), + args->addr, args->len, args->prot, + args->flags, args->fd, args->pgoff); +#endif + + linux_args.addr = PTROUT(args->addr); + linux_args.len = args->len; + linux_args.prot = args->prot; + linux_args.flags = args->flags; + linux_args.fd = args->fd; + linux_args.pgoff = args->pgoff; + + return (linux_mmap_common(td, &linux_args)); +} + +int +linux_mmap(struct thread *td, struct linux_mmap_args *args) +{ + int error; + struct l_mmap_argv linux_args; + + error = copyin(args->ptr, &linux_args, sizeof(linux_args)); + if (error) + return (error); + +#ifdef DEBUG + if (ldebug(mmap)) + printf(ARGS(mmap, "0x%08x, %d, %d, 0x%08x, %d, %d"), + linux_args.addr, linux_args.len, linux_args.prot, + linux_args.flags, linux_args.fd, linux_args.pgoff); +#endif + if ((linux_args.pgoff % PAGE_SIZE) != 0) + return (EINVAL); + linux_args.pgoff /= PAGE_SIZE; + + return (linux_mmap_common(td, &linux_args)); +} + +static int +linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args) +{ + struct proc *p = td->td_proc; + struct mmap_args /* { + caddr_t addr; + size_t len; + int prot; + int flags; + int fd; + long pad; + off_t pos; + } */ bsd_args; + int error; + struct file *fp; + + error = 0; + bsd_args.flags = 0; + fp = NULL; + + /* + * Linux mmap(2): + * You must specify exactly one of MAP_SHARED and MAP_PRIVATE + */ + if (! ((linux_args->flags & LINUX_MAP_SHARED) ^ + (linux_args->flags & LINUX_MAP_PRIVATE))) + return (EINVAL); + + if (linux_args->flags & LINUX_MAP_SHARED) + bsd_args.flags |= MAP_SHARED; + if (linux_args->flags & LINUX_MAP_PRIVATE) + bsd_args.flags |= MAP_PRIVATE; + if (linux_args->flags & LINUX_MAP_FIXED) + bsd_args.flags |= MAP_FIXED; + if (linux_args->flags & LINUX_MAP_ANON) + bsd_args.flags |= MAP_ANON; + else + bsd_args.flags |= MAP_NOSYNC; + if (linux_args->flags & LINUX_MAP_GROWSDOWN) + bsd_args.flags |= MAP_STACK; + + /* + * PROT_READ, PROT_WRITE, or PROT_EXEC implies PROT_READ and PROT_EXEC + * on Linux/i386. We do this to ensure maximum compatibility. + * Linux/ia64 does the same in i386 emulation mode. + */ + bsd_args.prot = linux_args->prot; + if (bsd_args.prot & (PROT_READ | PROT_WRITE | PROT_EXEC)) + bsd_args.prot |= PROT_READ | PROT_EXEC; + + /* Linux does not check file descriptor when MAP_ANONYMOUS is set. */ + bsd_args.fd = (bsd_args.flags & MAP_ANON) ? -1 : linux_args->fd; + if (bsd_args.fd != -1) { + /* + * Linux follows Solaris mmap(2) description: + * The file descriptor fildes is opened with + * read permission, regardless of the + * protection options specified. + */ + + if ((error = fget(td, bsd_args.fd, &fp)) != 0) + return (error); + if (fp->f_type != DTYPE_VNODE) { + fdrop(fp, td); + return (EINVAL); + } + + /* Linux mmap() just fails for O_WRONLY files */ + if (!(fp->f_flag & FREAD)) { + fdrop(fp, td); + return (EACCES); + } + + fdrop(fp, td); + } + + if (linux_args->flags & LINUX_MAP_GROWSDOWN) { + /* + * The Linux MAP_GROWSDOWN option does not limit auto + * growth of the region. Linux mmap with this option + * takes as addr the inital BOS, and as len, the initial + * region size. It can then grow down from addr without + * limit. However, Linux threads has an implicit internal + * limit to stack size of STACK_SIZE. Its just not + * enforced explicitly in Linux. But, here we impose + * a limit of (STACK_SIZE - GUARD_SIZE) on the stack + * region, since we can do this with our mmap. + * + * Our mmap with MAP_STACK takes addr as the maximum + * downsize limit on BOS, and as len the max size of + * the region. It then maps the top SGROWSIZ bytes, + * and auto grows the region down, up to the limit + * in addr. + * + * If we don't use the MAP_STACK option, the effect + * of this code is to allocate a stack region of a + * fixed size of (STACK_SIZE - GUARD_SIZE). + */ + + if ((caddr_t)PTRIN(linux_args->addr) + linux_args->len > + p->p_vmspace->vm_maxsaddr) { + /* + * Some Linux apps will attempt to mmap + * thread stacks near the top of their + * address space. If their TOS is greater + * than vm_maxsaddr, vm_map_growstack() + * will confuse the thread stack with the + * process stack and deliver a SEGV if they + * attempt to grow the thread stack past their + * current stacksize rlimit. To avoid this, + * adjust vm_maxsaddr upwards to reflect + * the current stacksize rlimit rather + * than the maximum possible stacksize. + * It would be better to adjust the + * mmap'ed region, but some apps do not check + * mmap's return value. + */ + PROC_LOCK(p); + p->p_vmspace->vm_maxsaddr = (char *)LINUX32_USRSTACK - + lim_cur(p, RLIMIT_STACK); + PROC_UNLOCK(p); + } + + /* + * This gives us our maximum stack size and a new BOS. + * If we're using VM_STACK, then mmap will just map + * the top SGROWSIZ bytes, and let the stack grow down + * to the limit at BOS. If we're not using VM_STACK + * we map the full stack, since we don't have a way + * to autogrow it. + */ + if (linux_args->len > STACK_SIZE - GUARD_SIZE) { + bsd_args.addr = (caddr_t)PTRIN(linux_args->addr); + bsd_args.len = linux_args->len; + } else { + bsd_args.addr = (caddr_t)PTRIN(linux_args->addr) - + (STACK_SIZE - GUARD_SIZE - linux_args->len); + bsd_args.len = STACK_SIZE - GUARD_SIZE; + } + } else { + bsd_args.addr = (caddr_t)PTRIN(linux_args->addr); + bsd_args.len = linux_args->len; + } + bsd_args.pos = (off_t)linux_args->pgoff * PAGE_SIZE; + +#ifdef DEBUG + if (ldebug(mmap)) + printf("-> %s(%p, %d, %d, 0x%08x, %d, 0x%x)\n", + __func__, + (void *)bsd_args.addr, (int)bsd_args.len, bsd_args.prot, + bsd_args.flags, bsd_args.fd, (int)bsd_args.pos); +#endif + error = mmap(td, &bsd_args); +#ifdef DEBUG + if (ldebug(mmap)) + printf("-> %s() return: 0x%x (0x%08x)\n", + __func__, error, (u_int)td->td_retval[0]); +#endif + return (error); +} + +int +linux_mprotect(struct thread *td, struct linux_mprotect_args *uap) +{ + struct mprotect_args bsd_args; + + bsd_args.addr = uap->addr; + bsd_args.len = uap->len; + bsd_args.prot = uap->prot; + if (bsd_args.prot & (PROT_READ | PROT_WRITE | PROT_EXEC)) + bsd_args.prot |= PROT_READ | PROT_EXEC; + return (mprotect(td, &bsd_args)); +} + +int +linux_iopl(struct thread *td, struct linux_iopl_args *args) +{ + int error; + + if (args->level < 0 || args->level > 3) + return (EINVAL); + if ((error = priv_check(td, PRIV_IO)) != 0) + return (error); + if ((error = securelevel_gt(td->td_ucred, 0)) != 0) + return (error); + td->td_frame->tf_rflags = (td->td_frame->tf_rflags & ~PSL_IOPL) | + (args->level * (PSL_IOPL / 3)); + + return (0); +} + +int +linux_pipe(struct thread *td, struct linux_pipe_args *args) +{ + int error; + int fildes[2]; + +#ifdef DEBUG + if (ldebug(pipe)) + printf(ARGS(pipe, "*")); +#endif + + error = kern_pipe(td, fildes); + if (error) + return (error); + + /* XXX: Close descriptors on error. */ + return (copyout(fildes, args->pipefds, sizeof fildes)); +} + +int +linux_sigaction(struct thread *td, struct linux_sigaction_args *args) +{ + l_osigaction_t osa; + l_sigaction_t act, oact; + int error; + +#ifdef DEBUG + if (ldebug(sigaction)) + printf(ARGS(sigaction, "%d, %p, %p"), + args->sig, (void *)args->nsa, (void *)args->osa); +#endif + + if (args->nsa != NULL) { + error = copyin(args->nsa, &osa, sizeof(l_osigaction_t)); + if (error) + return (error); + act.lsa_handler = osa.lsa_handler; + act.lsa_flags = osa.lsa_flags; + act.lsa_restorer = osa.lsa_restorer; + LINUX_SIGEMPTYSET(act.lsa_mask); + act.lsa_mask.__bits[0] = osa.lsa_mask; + } + + error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, + args->osa ? &oact : NULL); + + if (args->osa != NULL && !error) { + osa.lsa_handler = oact.lsa_handler; + osa.lsa_flags = oact.lsa_flags; + osa.lsa_restorer = oact.lsa_restorer; + osa.lsa_mask = oact.lsa_mask.__bits[0]; + error = copyout(&osa, args->osa, sizeof(l_osigaction_t)); + } + + return (error); +} + +/* + * Linux has two extra args, restart and oldmask. We don't use these, + * but it seems that "restart" is actually a context pointer that + * enables the signal to happen with a different register set. + */ +int +linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) +{ + sigset_t sigmask; + l_sigset_t mask; + +#ifdef DEBUG + if (ldebug(sigsuspend)) + printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask); +#endif + + LINUX_SIGEMPTYSET(mask); + mask.__bits[0] = args->mask; + linux_to_bsd_sigset(&mask, &sigmask); + return (kern_sigsuspend(td, sigmask)); +} + +int +linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap) +{ + l_sigset_t lmask; + sigset_t sigmask; + int error; + +#ifdef DEBUG + if (ldebug(rt_sigsuspend)) + printf(ARGS(rt_sigsuspend, "%p, %d"), + (void *)uap->newset, uap->sigsetsize); +#endif + + if (uap->sigsetsize != sizeof(l_sigset_t)) + return (EINVAL); + + error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); + if (error) + return (error); + + linux_to_bsd_sigset(&lmask, &sigmask); + return (kern_sigsuspend(td, sigmask)); +} + +int +linux_pause(struct thread *td, struct linux_pause_args *args) +{ + struct proc *p = td->td_proc; + sigset_t sigmask; + +#ifdef DEBUG + if (ldebug(pause)) + printf(ARGS(pause, "")); +#endif + + PROC_LOCK(p); + sigmask = td->td_sigmask; + PROC_UNLOCK(p); + return (kern_sigsuspend(td, sigmask)); +} + +int +linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) +{ + stack_t ss, oss; + l_stack_t lss; + int error; + +#ifdef DEBUG + if (ldebug(sigaltstack)) + printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss); +#endif + + if (uap->uss != NULL) { + error = copyin(uap->uss, &lss, sizeof(l_stack_t)); + if (error) + return (error); + + ss.ss_sp = PTRIN(lss.ss_sp); + ss.ss_size = lss.ss_size; + ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); + } + error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL, + (uap->uoss != NULL) ? &oss : NULL); + if (!error && uap->uoss != NULL) { + lss.ss_sp = PTROUT(oss.ss_sp); + lss.ss_size = oss.ss_size; + lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); + error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); + } + + return (error); +} + +int +linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args) +{ + struct ftruncate_args sa; + +#ifdef DEBUG + if (ldebug(ftruncate64)) + printf(ARGS(ftruncate64, "%u, %jd"), args->fd, + (intmax_t)args->length); +#endif + + sa.fd = args->fd; + sa.length = args->length; + return ftruncate(td, &sa); +} + +int +linux_gettimeofday(struct thread *td, struct linux_gettimeofday_args *uap) +{ + struct timeval atv; + l_timeval atv32; + struct timezone rtz; + int error = 0; + + if (uap->tp) { + microtime(&atv); + atv32.tv_sec = atv.tv_sec; + atv32.tv_usec = atv.tv_usec; + error = copyout(&atv32, uap->tp, sizeof(atv32)); + } + if (error == 0 && uap->tzp != NULL) { + rtz.tz_minuteswest = tz_minuteswest; + rtz.tz_dsttime = tz_dsttime; + error = copyout(&rtz, uap->tzp, sizeof(rtz)); + } + return (error); +} + +int +linux_settimeofday(struct thread *td, struct linux_settimeofday_args *uap) +{ + l_timeval atv32; + struct timeval atv, *tvp; + struct timezone atz, *tzp; + int error; + + if (uap->tp) { + error = copyin(uap->tp, &atv32, sizeof(atv32)); + if (error) + return (error); + atv.tv_sec = atv32.tv_sec; + atv.tv_usec = atv32.tv_usec; + tvp = &atv; + } else + tvp = NULL; + if (uap->tzp) { + error = copyin(uap->tzp, &atz, sizeof(atz)); + if (error) + return (error); + tzp = &atz; + } else + tzp = NULL; + return (kern_settimeofday(td, tvp, tzp)); +} + +int +linux_getrusage(struct thread *td, struct linux_getrusage_args *uap) +{ + struct l_rusage s32; + struct rusage s; + int error; + + error = kern_getrusage(td, uap->who, &s); + if (error != 0) + return (error); + if (uap->rusage != NULL) { + s32.ru_utime.tv_sec = s.ru_utime.tv_sec; + s32.ru_utime.tv_usec = s.ru_utime.tv_usec; + s32.ru_stime.tv_sec = s.ru_stime.tv_sec; + s32.ru_stime.tv_usec = s.ru_stime.tv_usec; + s32.ru_maxrss = s.ru_maxrss; + s32.ru_ixrss = s.ru_ixrss; + s32.ru_idrss = s.ru_idrss; + s32.ru_isrss = s.ru_isrss; + s32.ru_minflt = s.ru_minflt; + s32.ru_majflt = s.ru_majflt; + s32.ru_nswap = s.ru_nswap; + s32.ru_inblock = s.ru_inblock; + s32.ru_oublock = s.ru_oublock; + s32.ru_msgsnd = s.ru_msgsnd; + s32.ru_msgrcv = s.ru_msgrcv; + s32.ru_nsignals = s.ru_nsignals; + s32.ru_nvcsw = s.ru_nvcsw; + s32.ru_nivcsw = s.ru_nivcsw; + error = copyout(&s32, uap->rusage, sizeof(s32)); + } + return (error); +} + +int +linux_sched_rr_get_interval(struct thread *td, + struct linux_sched_rr_get_interval_args *uap) +{ + struct timespec ts; + struct l_timespec ts32; + int error; + + error = kern_sched_rr_get_interval(td, uap->pid, &ts); + if (error != 0) + return (error); + ts32.tv_sec = ts.tv_sec; + ts32.tv_nsec = ts.tv_nsec; + return (copyout(&ts32, uap->interval, sizeof(ts32))); +} + +int +linux_set_thread_area(struct thread *td, + struct linux_set_thread_area_args *args) +{ + struct l_user_desc info; + struct user_segment_descriptor sd; + int a[2]; + int error; + + error = copyin(args->desc, &info, sizeof(struct l_user_desc)); + if (error) + return (error); + +#ifdef DEBUG + if (ldebug(set_thread_area)) + printf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, " + "%i, %i, %i"), info.entry_number, info.base_addr, + info.limit, info.seg_32bit, info.contents, + info.read_exec_only, info.limit_in_pages, + info.seg_not_present, info.useable); +#endif + + /* + * Semantics of Linux version: every thread in the system has array + * of three TLS descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. + * This syscall loads one of the selected TLS decriptors with a value + * and also loads GDT descriptors 6, 7 and 8 with the content of + * the per-thread descriptors. + * + * Semantics of FreeBSD version: I think we can ignore that Linux has + * three per-thread descriptors and use just the first one. + * The tls_array[] is used only in [gs]et_thread_area() syscalls and + * for loading the GDT descriptors. We use just one GDT descriptor + * for TLS, so we will load just one. + * + * XXX: This doesn't work when a user space process tries to use more + * than one TLS segment. Comment in the Linux source says wine might + * do this. + */ + + /* + * GLIBC reads current %gs and call set_thread_area() with it. + * We should let GUDATA_SEL and GUGS32_SEL proceed as well because + * we use these segments. + */ + switch (info.entry_number) { + case GUGS32_SEL: + case GUDATA_SEL: + case 6: + case -1: + info.entry_number = GUGS32_SEL; + break; + default: + return (EINVAL); + } + + /* + * We have to copy out the GDT entry we use. + * + * XXX: What if a user space program does not check the return value + * and tries to use 6, 7 or 8? + */ + error = copyout(&info, args->desc, sizeof(struct l_user_desc)); + if (error) + return (error); + + if (LINUX_LDT_empty(&info)) { + a[0] = 0; + a[1] = 0; + } else { + a[0] = LINUX_LDT_entry_a(&info); + a[1] = LINUX_LDT_entry_b(&info); + } + + memcpy(&sd, &a, sizeof(a)); +#ifdef DEBUG + if (ldebug(set_thread_area)) + printf("Segment created in set_thread_area: " + "lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, " + "type: %i, dpl: %i, p: %i, xx: %i, long: %i, " + "def32: %i, gran: %i\n", + sd.sd_lobase, + sd.sd_hibase, + sd.sd_lolimit, + sd.sd_hilimit, + sd.sd_type, + sd.sd_dpl, + sd.sd_p, + sd.sd_xx, + sd.sd_long, + sd.sd_def32, + sd.sd_gran); +#endif + + td->td_pcb->pcb_gsbase = (register_t)info.base_addr; + td->td_pcb->pcb_flags |= PCB_32BIT | PCB_GS32BIT; + update_gdt_gsbase(td, info.base_addr); + + return (0); +} |