diff options
| author | fvdl <fvdl@NetBSD.org> | 1995-02-28 23:24:35 +0000 |
|---|---|---|
| committer | fvdl <fvdl@NetBSD.org> | 1995-02-28 23:24:35 +0000 |
| commit | 3bf459f350dcbcf47afccba837f4466b132a98c8 (patch) | |
| tree | 282143a8f0ed1d8860e89324a32312964e0bd6e8 /sys/compat/linux/linux_misc.c | |
| parent | 8bb0b6790c84a1e16ffa558fd110fb0d90cd0470 (diff) | |
Added Linux compat code.
Diffstat (limited to 'sys/compat/linux/linux_misc.c')
| -rw-r--r-- | sys/compat/linux/linux_misc.c | 726 |
1 files changed, 726 insertions, 0 deletions
diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c new file mode 100644 index 00000000000..3d8df4385e0 --- /dev/null +++ b/sys/compat/linux/linux_misc.c @@ -0,0 +1,726 @@ +/* $NetBSD: linux_misc.c,v 1.1 1995/02/28 23:25:07 fvdl Exp $ */ + +/* + * Copyright (c) 1995 Frank van der Linden + * 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. + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed for the NetBSD Project + * by Frank van der Linden + * 4. 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. + */ + +/* + * Linux compatibility module. Try to deal with various Linux system calls. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/namei.h> +#include <sys/proc.h> +#include <sys/dir.h> +#include <sys/file.h> +#include <sys/stat.h> +#include <sys/filedesc.h> +#include <sys/ioctl.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/mman.h> +#include <sys/mount.h> +#include <sys/ptrace.h> +#include <sys/resource.h> +#include <sys/resourcevar.h> +#include <sys/signal.h> +#include <sys/signalvar.h> +#include <sys/socket.h> +#include <sys/time.h> +#include <sys/times.h> +#include <sys/vnode.h> +#include <sys/uio.h> +#include <sys/wait.h> +#include <sys/utsname.h> +#include <sys/unistd.h> + +#include <sys/syscallargs.h> + +#include <vm/vm.h> +#include <vm/vm_param.h> + +#include <compat/linux/linux_types.h> +#include <compat/linux/linux_fcntl.h> +#include <compat/linux/linux_mmap.h> +#include <compat/linux/linux_syscallargs.h> +#include <compat/linux/linux_util.h> +#include <compat/linux/linux_dirent.h> + +/* + * The information on a terminated (or stopped) process needs + * to be converted in order for Linux binaries to get a valid signal + * number out of it. + */ +static int +bsd_to_linux_wstat(status) + int *status; +{ + if (WIFSIGNALED(*status)) + *status = (*status & ~0177) | + bsd_to_linux_sig(WTERMSIG(*status)); + else if (WIFSTOPPED(*status)) + *status = (*status & ~0xff00) | + (bsd_to_linux_sig(WSTOPSIG(*status)) << 8); +} + +/* + * waitpid(2). Passed on to the NetBSD call, surrounded by code to + * reserve some space for a NetBSD-style wait status, and converting + * it to what Linux wants. + */ +int +linux_waitpid(p, uap, retval) + struct proc *p; + struct linux_waitpid_args /* { + syscallarg(int) pid; + syscallarg(int *) status; + syscallarg(int) options; + } */ *uap; + register_t *retval; +{ + struct wait4_args w4a; + int error, *status, tstat; + caddr_t sg; + + sg = stackgap_init(); + status = (int *) stackgap_alloc(&sg, sizeof status); + + SCARG(&w4a, pid) = SCARG(uap, pid); + SCARG(&w4a, status) = status; + SCARG(&w4a, options) = SCARG(uap, options); + SCARG(&w4a, rusage) = NULL; + + if ((error = wait4(p, &w4a, retval))) + return error; + + if ((error = copyin(status, &tstat, sizeof tstat))) + return error; + + bsd_to_linux_wstat(&tstat); + + return copyout(&tstat, SCARG(uap, status), sizeof tstat); +} + +/* + * This is very much the same as waitpid() + */ +int +linux_wait4(p, uap, retval) + struct proc *p; + struct linux_wait4_args /* { + syscallarg(int) pid; + syscallarg(int *) status; + syscallarg(int) options; + syscallarg(struct rusage *) rusage; + } */ *uap; + register_t *retval; +{ + struct wait4_args w4a; + int error, *status, tstat; + caddr_t sg; + + sg = stackgap_init(); + status = (int *) stackgap_alloc(&sg, sizeof status); + + SCARG(&w4a, pid) = SCARG(uap, pid); + SCARG(&w4a, status) = status; + SCARG(&w4a, options) = SCARG(uap, options); + SCARG(&w4a, rusage) = SCARG(uap, rusage); + + if ((error = wait4(p, &w4a, retval))) + return error; + + if ((error = copyin(status, &tstat, sizeof tstat))) + return error; + + bsd_to_linux_wstat(&tstat); + + return copyout(&tstat, SCARG(uap, status), sizeof tstat); +} + +/* + * This is the old brk(2) call. I don't think anything in the Linux + * world uses this anymore + */ +int +linux_break(p, uap, retval) + struct proc *p; + struct linux_brk_args /* { + syscallarg(char *) nsize; + } */ *uap; + register_t *retval; +{ + return ENOSYS; +} + +/* + * Linux brk(2). The check if the new address is >= the old one is + * done in the kernel in Linux. NetBSD does it in the library. + */ +int +linux_brk(p, uap, retval) + struct proc *p; + struct linux_brk_args /* { + syscallarg(char *) nsize; + } */ *uap; + register_t *retval; +{ + char *nbrk = SCARG(uap, nsize); + struct obreak_args oba; + struct vmspace *vm = p->p_vmspace; + int error = 0; + caddr_t oldbrk, newbrk; + + oldbrk = vm->vm_daddr + ctob(vm->vm_dsize); + /* + * XXX inconsistent.. Linux always returns at least the old + * brk value, but it will be page-aligned if this fails, + * and possibly not page aligned if it succeeds (the user + * supplied pointer is returned). + */ + SCARG(&oba, nsize) = nbrk; + + if ((caddr_t) nbrk > vm->vm_daddr && obreak(p, &oba, retval) == 0) + retval[0] = (register_t) nbrk; + else + retval[0] = (register_t) oldbrk; + + return 0; +} + +/* + * I wonder why Linux has gettimeofday() _and_ time().. Still, we + * need to deal with it. + */ +int +linux_time(p, uap, retval) + struct proc *p; + struct linux_time_args /* { + linux_time_t *t; + } */ *uap; + register_t *retval; +{ + struct timeval atv; + linux_time_t tt; + int error; + + microtime(&atv); + + tt = atv.tv_sec; + if (SCARG(uap, t) && (error = copyout(&tt, SCARG(uap, t), sizeof tt))) + return error; + + retval[0] = tt; + return 0; +} + +/* + * The statfs and fstatfs called are not implemented yet. They're + * easy, but just not important for the binaries I wanted to get + * running. + */ +int +linux_statfs(p, uap, retval) + struct proc *p; + struct linux_statfs_args /* { + syscallarg(char *) path; + syscallarg(struct linux_statfs *) sp; + } */ *uap; + register_t *retval; +{ + return ENOSYS; +} + +int +linux_fstatfs(p, uap, retval) + struct proc *p; + struct linux_fstatfs_args /* { + syscallarg(char *) path; + syscallarg(struct linux_statfs *) sp; + } */ *uap; + register_t *retval; +{ + return ENOSYS; +} + +/* + * uname(). Just copy the info from the various strings stored in the + * kernel, and put it in the Linux utsname structure. That structure + * is almost the same as the NetBSD one, only it has fields 65 characters + * long, and an extra domainname field. + */ +int +linux_uname(p, uap, retval) + struct proc *p; + struct linux_uname_args /* { + syscallarg(struct linux_utsname *) up; + } */ *uap; + register_t *retval; +{ + extern char ostype[], osrelease[], version[], hostname[], domainname[]; + extern char machine[]; + struct linux_utsname tluts; + int len; + char *cp; + + strncpy(tluts.l_sysname, ostype, sizeof (tluts.l_sysname)); + strncpy(tluts.l_nodename, hostname, sizeof (tluts.l_nodename)); + strncpy(tluts.l_release, osrelease, sizeof (tluts.l_release)); + strncpy(tluts.l_machine, machine, sizeof (tluts.l_machine)); + strncpy(tluts.l_domainname, domainname, sizeof (tluts.l_domainname)); + strncpy(tluts.l_version, version, sizeof (tluts.l_version)); + + /* This part taken from the the uname() in libc */ + len = sizeof (tluts.l_version); + for (cp = tluts.l_version; len--; ++cp) + if (*cp == '\n' || *cp == '\t') + if (len > 1) + *cp = ' '; + else + *cp = '\0'; + + return copyout(&tluts, SCARG(uap, up), sizeof tluts); +} + +/* + * Linux wants to pass everything to a syscall in registers. However, + * mmap() has 6 of them. Oops: out of register error. They just pass + * everything in a structure. + */ +int +linux_mmap(p, uap, retval) + struct proc *p; + struct linux_mmap_args /* { + syscallarg(struct linux_mmap *) lmp; + } */ *uap; + register_t *retval; +{ + struct linux_mmap lmap; + struct mmap_args cma; + int error, flags; + + if ((error = copyin(SCARG(uap, lmp), &lmap, sizeof lmap))) + return error; + + flags = 0; + flags |= cvtto_bsd_mask(lmap.lm_flags, LINUX_MAP_SHARED, MAP_SHARED); + flags |= cvtto_bsd_mask(lmap.lm_flags, LINUX_MAP_PRIVATE, MAP_PRIVATE); + flags |= cvtto_bsd_mask(lmap.lm_flags, LINUX_MAP_FIXED, MAP_FIXED); + flags |= cvtto_bsd_mask(lmap.lm_flags, LINUX_MAP_ANON, MAP_ANON); + + SCARG(&cma,addr) = lmap.lm_addr; + SCARG(&cma,len) = lmap.lm_len; + SCARG(&cma,prot) = lmap.lm_prot; + SCARG(&cma,flags) = flags; + SCARG(&cma,fd) = lmap.lm_fd; + SCARG(&cma,pad) = 0; + SCARG(&cma,pos) = lmap.lm_pos; + + return mmap(p, &cma, retval); +} + +/* + * Linux doesn't use the retval[1] value to determine whether + * we are the child or parent. + */ +int +linux_fork(p, uap, retval) + struct proc *p; + void *uap; + register_t *retval; +{ + int error; + + if ((error = fork(p, uap, retval))) + return error; + + if (retval[1] == 1) + retval[0] = 0; + + return 0; +} + +/* + * This code is partly stolen from src/lib/libc/compat-43/times.c + * XXX - CLK_TCK isn't declared in /sys, just in <time.h>, done here + */ + +#define CLK_TCK 100 +#define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) + +int +linux_times(p, uap, retval) + struct proc *p; + struct linux_times_args /* { + syscallarg(struct times *) tms; + } */ *uap; + register_t *retval; +{ + struct timeval t; + struct linux_tms ltms; + struct rusage ru; + int error; + + calcru(p, &ru.ru_utime, &ru.ru_stime, NULL); + ltms.ltms_utime = CONVTCK(ru.ru_utime); + ltms.ltms_stime = CONVTCK(ru.ru_stime); + + ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); + ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); + + if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) + return error; + + microtime(&t); + + retval[0] = ((linux_clock_t)(CONVTCK(t))); + return 0; +} + +/* + * NetBSD passes fd[0] in retval[0], and fd[1] in retval[1]. + * Linux directly passes the pointer. + */ +int +linux_pipe(p, uap, retval) + struct proc *p; + struct linux_pipe_args /* { + syscallarg(int *) pfds; + } */ *uap; + register_t *retval; +{ + int error; + + if ((error = pipe(p, 0, retval))) + return error; + + /* Assumes register_t is an int */ + + if ((error = copyout(retval, SCARG(uap, pfds), 2 * sizeof (int)))) + return error; + + retval[0] = 0; + return 0; +} + +/* + * Alarm. This is a libc call which used setitimer(2) in NetBSD. + * Fiddle with the timers to make it work. + */ +int +linux_alarm(p, uap, retval) + struct proc *p; + struct linux_alarm_args /* { + syscallarg(unsigned int) secs; + } */ *uap; + register_t *retval; +{ + int error, s; + struct itimerval *itp, it; + + itp = &p->p_realtimer; + s = splclock(); + /* + * Clear any pending timer alarms. + */ + untimeout(realitexpire, p); + timerclear(&itp->it_interval); + if (timerisset(&itp->it_value) && + timercmp(&itp->it_value, &time, >)) + __timersub(&itp->it_value, &time); + /* + * Return how many seconds were left (rounded up) + */ + retval[0] = itp->it_value.tv_sec; + if (itp->it_value.tv_usec) + retval[0]++; + + /* + * alarm(0) just resets the timer. + */ + if (SCARG(uap, secs) == 0) { + timerclear(&itp->it_value); + splx(s); + return 0; + } + + /* + * Check the new alarm time for sanity, and set it. + */ + timerclear(&it.it_interval); + it.it_value.tv_sec = SCARG(uap, secs); + it.it_value.tv_usec = 0; + if (itimerfix(&it.it_value) || itimerfix(&it.it_interval)) { + splx(s); + return (EINVAL); + } + + if (timerisset(&it.it_value)) { + __timeradd(&it.it_value, &time); + timeout(realitexpire, p, hzto(&it.it_value)); + } + p->p_realtimer = it; + splx(s); + + return 0; +} + +/* + * utime(). Do conversion to things that utimes() understands, + * and pass it on. + */ +int +linux_utime(p, uap, retval) + struct proc *p; + struct linux_utime_args /* { + syscallarg(char *) path; + syscallarg(struct linux_utimbuf *)times; + } */ *uap; + register_t *retval; +{ + caddr_t sg; + int error; + struct utimes_args ua; + struct timeval tv[2], *tvp; + struct linux_utimbuf lut; + + sg = stackgap_init(); + CHECK_ALT(p, &sg, SCARG(uap, path)); + + SCARG(&ua, path) = SCARG(uap, path); + + if (SCARG(uap, times) != NULL) { + if ((error = copyin(SCARG(uap, times), &lut, sizeof lut))) + return error; + tv[0].tv_usec = tv[1].tv_usec = 0; + tv[0].tv_sec = lut.l_actime; + tv[1].tv_sec = lut.l_modtime; + tvp = (struct timeval *) stackgap_alloc(sizeof tv); + if ((error = copyout(tv, tvp, sizeof tv))) + return error; + SCARG(&ua, tptr) = tvp; + } + else + SCARG(&ua, tptr) = NULL; + + return utimes(p, uap, retval); +} + +/* + * Linux 'readdir' call. This code is mostly taken from the + * SunOS getdents call (see compat/sunos/sunos_misc.c), though + * an attempt has been made to keep it a little cleaner (failing + * miserably, because of the cruft needed if count 1 is passed). + * + * Read in BSD-style entries, convert them, and copy them out. + * Note that the Linux d_reclen is actually the name length, + * and d_off is the reclen. + * + * Note that this doesn't handle union-mounted filesystems. + */ +int +linux_readdir(p, uap, retval) + struct proc *p; + struct linux_readdir_args /* { + syscallarg(int) fd; + syscallarg(struct linux_dirent *) dent; + syscallarg(unsigned int) count; + } */ *uap; + register_t *retval; +{ + register struct dirent *bdp; + struct vnode *vp; + caddr_t inp, buf; /* BSD-format */ + int len, reclen; /* BSD-format */ + caddr_t outp; /* Linux-format */ + int resid, linuxreclen; /* Linux-format */ + struct file *fp; + struct uio auio; + struct iovec aiov; + struct linux_dirent idb; + off_t off; /* true file offset */ + linux_off_t soff; /* Linux file offset */ + int buflen, error, eofflag, nbytes, justone; + struct vattr va; + + if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) + return (error); + + if ((fp->f_flag & FREAD) == 0) + return (EBADF); + + vp = (struct vnode *) fp->f_data; + + if (vp->v_type != VDIR) /* XXX vnode readdir op should do this */ + return (EINVAL); + + if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) + return error; + + nbytes = SCARG(uap, count); + if (nbytes == 1) { /* Need this for older Linux libs, apparently */ + nbytes = sizeof (struct linux_dirent); + justone = 1; + } + else + justone = 0; + + buflen = max(va.va_blocksize, nbytes); + buf = malloc(buflen, M_TEMP, M_WAITOK); + VOP_LOCK(vp); + off = fp->f_offset; +again: + aiov.iov_base = buf; + aiov.iov_len = buflen; + auio.uio_iov = &aiov; + auio.uio_iovcnt = 1; + auio.uio_rw = UIO_READ; + auio.uio_segflg = UIO_SYSSPACE; + auio.uio_procp = p; + auio.uio_resid = buflen; + auio.uio_offset = off; + /* + * First we read into the malloc'ed buffer, then + * we massage it into user space, one record at a time. + */ + error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (u_long *) 0, 0); + if (error) + goto out; + + inp = buf; + outp = (caddr_t) SCARG(uap, dent); + resid = nbytes; + if ((len = buflen - auio.uio_resid) == 0) + goto eof; + + for (; len > 0; len -= reclen) { + reclen = ((struct dirent *) inp)->d_reclen; + if (reclen & 3) + panic("linux_readdir"); + off += reclen; /* each entry points to next */ + bdp = (struct dirent *) inp; + if (bdp->d_fileno == 0) { + inp += reclen; /* it is a hole; squish it out */ + continue; + } + linuxreclen = LINUX_RECLEN(&idb, bdp->d_namlen); + if (reclen > len || resid < linuxreclen) { + /* entry too big for buffer, so just stop */ + outp++; + break; + } + /* + * Massage in place to make a Linux-shaped dirent (otherwise + * we have to worry about touching user memory outside of + * the copyout() call). + */ + idb.l_dino = (long) bdp->d_fileno; + idb.l_doff = (linux_off_t) linuxreclen; + idb.l_dreclen = (u_short) bdp->d_namlen; /* sigh */ + strcpy(idb.l_dname, bdp->d_name); + if ((error = copyout((caddr_t)&idb, outp, linuxreclen))) + goto out; + /* advance past this real entry */ + inp += reclen; + /* advance output past Linux-shaped entry */ + outp += linuxreclen; + resid -= linuxreclen; + if (justone) + break; + } + + /* if we squished out the whole block, try again */ + if (outp == (caddr_t) SCARG(uap, dent)) + goto again; + fp->f_offset = off; /* update the vnode offset */ + + if (justone) + nbytes = resid + linuxreclen; + +eof: + *retval = nbytes - resid; +out: + VOP_UNLOCK(vp); + free(buf, M_TEMP); + return error; +} + +/* + * Out of register error once more.. Apart from that, no difference. + */ +int +linux_select(p, uap, retval) + struct proc *p; + struct linux_select_args /* { + syscallarg(struct linux_select *) lsp; + } */ *uap; + register_t *retval; +{ + struct linux_select ls; + struct select_args bsa; + int error; + + if ((error = copyin(SCARG(uap, lsp), (caddr_t) &ls, sizeof ls))) + return error; + + SCARG(&bsa, nd) = ls.nfds; + SCARG(&bsa, in) = ls.readfds; + SCARG(&bsa, ou) = ls.writefds; + SCARG(&bsa, ex) = ls.exceptfds; + SCARG(&bsa, tv) = ls.timeout; + + return select(p, &bsa, retval); +} + +/* + * Get the process group of a certain process. Look it up + * and return the value. + */ +int +linux_getpgid(p, uap, retval) + struct proc *p; + struct linux_getpgid_args /* { + syscallarg(int) pid; + } */ *uap; + register_t *retval; +{ + struct proc *targp; + + if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) + if ((targp = pfind(SCARG(uap, pid))) == 0) + return ESRCH; + else + targp = p; + + retval[0] = targp->p_pgid; + return 0; +} |
