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kernel/compat.c
30.3 KB
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/* * linux/kernel/compat.c * * Kernel compatibililty routines for e.g. 32 bit syscall support * on 64 bit kernels. * * Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/linkage.h> #include <linux/compat.h> #include <linux/errno.h> #include <linux/time.h> #include <linux/signal.h> #include <linux/sched.h> /* for MAX_SCHEDULE_TIMEOUT */ |
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#include <linux/syscalls.h> #include <linux/unistd.h> #include <linux/security.h> |
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#include <linux/timex.h> |
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#include <linux/export.h> |
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#include <linux/migrate.h> |
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#include <linux/posix-timers.h> |
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#include <linux/times.h> |
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#include <linux/ptrace.h> |
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#include <linux/gfp.h> |
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#include <asm/uaccess.h> |
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/* |
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* Get/set struct timeval with struct timespec on the native side |
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*/ |
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static int compat_get_timeval_convert(struct timespec *o, struct compat_timeval __user *i) |
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{ long usec; if (get_user(o->tv_sec, &i->tv_sec) || get_user(usec, &i->tv_usec)) return -EFAULT; o->tv_nsec = usec * 1000; return 0; } |
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static int compat_put_timeval_convert(struct compat_timeval __user *o, struct timeval *i) |
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{ return (put_user(i->tv_sec, &o->tv_sec) || put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; } |
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static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp) { memset(txc, 0, sizeof(struct timex)); if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || __get_user(txc->modes, &utp->modes) || __get_user(txc->offset, &utp->offset) || __get_user(txc->freq, &utp->freq) || __get_user(txc->maxerror, &utp->maxerror) || __get_user(txc->esterror, &utp->esterror) || __get_user(txc->status, &utp->status) || __get_user(txc->constant, &utp->constant) || __get_user(txc->precision, &utp->precision) || __get_user(txc->tolerance, &utp->tolerance) || __get_user(txc->time.tv_sec, &utp->time.tv_sec) || __get_user(txc->time.tv_usec, &utp->time.tv_usec) || __get_user(txc->tick, &utp->tick) || __get_user(txc->ppsfreq, &utp->ppsfreq) || __get_user(txc->jitter, &utp->jitter) || __get_user(txc->shift, &utp->shift) || __get_user(txc->stabil, &utp->stabil) || __get_user(txc->jitcnt, &utp->jitcnt) || __get_user(txc->calcnt, &utp->calcnt) || __get_user(txc->errcnt, &utp->errcnt) || __get_user(txc->stbcnt, &utp->stbcnt)) return -EFAULT; return 0; } static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc) { if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || __put_user(txc->modes, &utp->modes) || __put_user(txc->offset, &utp->offset) || __put_user(txc->freq, &utp->freq) || __put_user(txc->maxerror, &utp->maxerror) || __put_user(txc->esterror, &utp->esterror) || __put_user(txc->status, &utp->status) || __put_user(txc->constant, &utp->constant) || __put_user(txc->precision, &utp->precision) || __put_user(txc->tolerance, &utp->tolerance) || __put_user(txc->time.tv_sec, &utp->time.tv_sec) || __put_user(txc->time.tv_usec, &utp->time.tv_usec) || __put_user(txc->tick, &utp->tick) || __put_user(txc->ppsfreq, &utp->ppsfreq) || __put_user(txc->jitter, &utp->jitter) || __put_user(txc->shift, &utp->shift) || __put_user(txc->stabil, &utp->stabil) || __put_user(txc->jitcnt, &utp->jitcnt) || __put_user(txc->calcnt, &utp->calcnt) || __put_user(txc->errcnt, &utp->errcnt) || __put_user(txc->stbcnt, &utp->stbcnt) || __put_user(txc->tai, &utp->tai)) return -EFAULT; return 0; } |
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asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) { if (tv) { struct timeval ktv; do_gettimeofday(&ktv); |
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if (compat_put_timeval_convert(tv, &ktv)) |
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return -EFAULT; } if (tz) { if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) return -EFAULT; } return 0; } asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) { struct timespec kts; struct timezone ktz; if (tv) { |
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if (compat_get_timeval_convert(&kts, tv)) |
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return -EFAULT; } if (tz) { if (copy_from_user(&ktz, tz, sizeof(ktz))) return -EFAULT; } return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); } |
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int get_compat_timeval(struct timeval *tv, const struct compat_timeval __user *ctv) { return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) || __get_user(tv->tv_sec, &ctv->tv_sec) || __get_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0; } EXPORT_SYMBOL_GPL(get_compat_timeval); int put_compat_timeval(const struct timeval *tv, struct compat_timeval __user *ctv) { return (!access_ok(VERIFY_WRITE, ctv, sizeof(*ctv)) || __put_user(tv->tv_sec, &ctv->tv_sec) || __put_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0; } EXPORT_SYMBOL_GPL(put_compat_timeval); |
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int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) { return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || __get_user(ts->tv_sec, &cts->tv_sec) || __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; } |
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EXPORT_SYMBOL_GPL(get_compat_timespec); |
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int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts) { return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || __put_user(ts->tv_sec, &cts->tv_sec) || __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; } |
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EXPORT_SYMBOL_GPL(put_compat_timespec); |
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int compat_get_timeval(struct timeval *tv, const void __user *utv) { if (COMPAT_USE_64BIT_TIME) return copy_from_user(tv, utv, sizeof *tv) ? -EFAULT : 0; else return get_compat_timeval(tv, utv); } EXPORT_SYMBOL_GPL(compat_get_timeval); int compat_put_timeval(const struct timeval *tv, void __user *utv) { if (COMPAT_USE_64BIT_TIME) return copy_to_user(utv, tv, sizeof *tv) ? -EFAULT : 0; else return put_compat_timeval(tv, utv); } EXPORT_SYMBOL_GPL(compat_put_timeval); int compat_get_timespec(struct timespec *ts, const void __user *uts) { if (COMPAT_USE_64BIT_TIME) return copy_from_user(ts, uts, sizeof *ts) ? -EFAULT : 0; else return get_compat_timespec(ts, uts); } EXPORT_SYMBOL_GPL(compat_get_timespec); int compat_put_timespec(const struct timespec *ts, void __user *uts) { if (COMPAT_USE_64BIT_TIME) return copy_to_user(uts, ts, sizeof *ts) ? -EFAULT : 0; else return put_compat_timespec(ts, uts); } EXPORT_SYMBOL_GPL(compat_put_timespec); |
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static long compat_nanosleep_restart(struct restart_block *restart) { struct compat_timespec __user *rmtp; struct timespec rmt; mm_segment_t oldfs; long ret; |
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restart->nanosleep.rmtp = (struct timespec __user *) &rmt; |
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oldfs = get_fs(); set_fs(KERNEL_DS); ret = hrtimer_nanosleep_restart(restart); set_fs(oldfs); if (ret) { |
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rmtp = restart->nanosleep.compat_rmtp; |
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if (rmtp && put_compat_timespec(&rmt, rmtp)) return -EFAULT; } return ret; } |
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asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, |
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struct compat_timespec __user *rmtp) |
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{ |
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struct timespec tu, rmt; |
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mm_segment_t oldfs; |
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long ret; |
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if (get_compat_timespec(&tu, rqtp)) |
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return -EFAULT; |
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if (!timespec_valid(&tu)) |
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return -EINVAL; |
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oldfs = get_fs(); set_fs(KERNEL_DS); ret = hrtimer_nanosleep(&tu, rmtp ? (struct timespec __user *)&rmt : NULL, HRTIMER_MODE_REL, CLOCK_MONOTONIC); set_fs(oldfs); if (ret) { struct restart_block *restart = ¤t_thread_info()->restart_block; restart->fn = compat_nanosleep_restart; |
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restart->nanosleep.compat_rmtp = rmtp; |
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if (rmtp && put_compat_timespec(&rmt, rmtp)) |
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return -EFAULT; } |
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return ret; |
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} static inline long get_compat_itimerval(struct itimerval *o, struct compat_itimerval __user *i) { return (!access_ok(VERIFY_READ, i, sizeof(*i)) || (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); } static inline long put_compat_itimerval(struct compat_itimerval __user *o, struct itimerval *i) { return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); } asmlinkage long compat_sys_getitimer(int which, struct compat_itimerval __user *it) { struct itimerval kit; int error; error = do_getitimer(which, &kit); if (!error && put_compat_itimerval(it, &kit)) error = -EFAULT; return error; } asmlinkage long compat_sys_setitimer(int which, struct compat_itimerval __user *in, struct compat_itimerval __user *out) { struct itimerval kin, kout; int error; if (in) { if (get_compat_itimerval(&kin, in)) return -EFAULT; } else memset(&kin, 0, sizeof(kin)); error = do_setitimer(which, &kin, out ? &kout : NULL); if (error || !out) return error; if (put_compat_itimerval(out, &kout)) return -EFAULT; return 0; } |
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static compat_clock_t clock_t_to_compat_clock_t(clock_t x) { return compat_jiffies_to_clock_t(clock_t_to_jiffies(x)); } |
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asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) { |
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if (tbuf) { |
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struct tms tms; |
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struct compat_tms tmp; |
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do_sys_times(&tms); /* Convert our struct tms to the compat version. */ tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime); tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime); tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime); tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime); |
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if (copy_to_user(tbuf, &tmp, sizeof(tmp))) return -EFAULT; } |
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force_successful_syscall_return(); |
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return compat_jiffies_to_clock_t(jiffies); } |
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#ifdef __ARCH_WANT_SYS_SIGPENDING |
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/* * Assumption: old_sigset_t and compat_old_sigset_t are both * types that can be passed to put_user()/get_user(). */ asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) { old_sigset_t s; long ret; mm_segment_t old_fs = get_fs(); set_fs(KERNEL_DS); ret = sys_sigpending((old_sigset_t __user *) &s); set_fs(old_fs); if (ret == 0) ret = put_user(s, set); return ret; } |
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#endif #ifdef __ARCH_WANT_SYS_SIGPROCMASK |
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/* * sys_sigprocmask SIG_SETMASK sets the first (compat) word of the * blocked set of signals to the supplied signal set */ static inline void compat_sig_setmask(sigset_t *blocked, compat_sigset_word set) |
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{ |
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memcpy(blocked->sig, &set, sizeof(set)); } |
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asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, compat_old_sigset_t __user *oset) { old_sigset_t old_set, new_set; sigset_t new_blocked; old_set = current->blocked.sig[0]; if (nset) { if (get_user(new_set, nset)) return -EFAULT; new_set &= ~(sigmask(SIGKILL) | sigmask(SIGSTOP)); new_blocked = current->blocked; switch (how) { case SIG_BLOCK: sigaddsetmask(&new_blocked, new_set); break; case SIG_UNBLOCK: sigdelsetmask(&new_blocked, new_set); break; case SIG_SETMASK: compat_sig_setmask(&new_blocked, new_set); break; default: return -EINVAL; } set_current_blocked(&new_blocked); } if (oset) { if (put_user(old_set, oset)) return -EFAULT; } return 0; |
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} |
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#endif |
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asmlinkage long compat_sys_setrlimit(unsigned int resource, struct compat_rlimit __user *rlim) { struct rlimit r; |
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if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || __get_user(r.rlim_cur, &rlim->rlim_cur) || __get_user(r.rlim_max, &rlim->rlim_max)) return -EFAULT; if (r.rlim_cur == COMPAT_RLIM_INFINITY) r.rlim_cur = RLIM_INFINITY; if (r.rlim_max == COMPAT_RLIM_INFINITY) r.rlim_max = RLIM_INFINITY; |
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return do_prlimit(current, resource, &r, NULL); |
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} #ifdef COMPAT_RLIM_OLD_INFINITY asmlinkage long compat_sys_old_getrlimit(unsigned int resource, struct compat_rlimit __user *rlim) { struct rlimit r; int ret; mm_segment_t old_fs = get_fs(); set_fs(KERNEL_DS); ret = sys_old_getrlimit(resource, &r); set_fs(old_fs); if (!ret) { if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) r.rlim_cur = COMPAT_RLIM_INFINITY; if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) r.rlim_max = COMPAT_RLIM_INFINITY; if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || __put_user(r.rlim_cur, &rlim->rlim_cur) || __put_user(r.rlim_max, &rlim->rlim_max)) return -EFAULT; } return ret; } #endif |
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asmlinkage long compat_sys_getrlimit(unsigned int resource, |
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struct compat_rlimit __user *rlim) { struct rlimit r; int ret; |
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ret = do_prlimit(current, resource, NULL, &r); |
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if (!ret) { if (r.rlim_cur > COMPAT_RLIM_INFINITY) r.rlim_cur = COMPAT_RLIM_INFINITY; if (r.rlim_max > COMPAT_RLIM_INFINITY) r.rlim_max = COMPAT_RLIM_INFINITY; if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || __put_user(r.rlim_cur, &rlim->rlim_cur) || __put_user(r.rlim_max, &rlim->rlim_max)) return -EFAULT; } return ret; } int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) { if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || __put_user(r->ru_maxrss, &ru->ru_maxrss) || __put_user(r->ru_ixrss, &ru->ru_ixrss) || __put_user(r->ru_idrss, &ru->ru_idrss) || __put_user(r->ru_isrss, &ru->ru_isrss) || __put_user(r->ru_minflt, &ru->ru_minflt) || __put_user(r->ru_majflt, &ru->ru_majflt) || __put_user(r->ru_nswap, &ru->ru_nswap) || __put_user(r->ru_inblock, &ru->ru_inblock) || __put_user(r->ru_oublock, &ru->ru_oublock) || __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || __put_user(r->ru_nsignals, &ru->ru_nsignals) || __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) return -EFAULT; return 0; } asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) { struct rusage r; int ret; mm_segment_t old_fs = get_fs(); set_fs(KERNEL_DS); ret = sys_getrusage(who, (struct rusage __user *) &r); set_fs(old_fs); if (ret) return ret; if (put_compat_rusage(&r, ru)) return -EFAULT; return 0; } asmlinkage long compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, struct compat_rusage __user *ru) { if (!ru) { return sys_wait4(pid, stat_addr, options, NULL); } else { struct rusage r; int ret; unsigned int status; mm_segment_t old_fs = get_fs(); set_fs (KERNEL_DS); ret = sys_wait4(pid, (stat_addr ? (unsigned int __user *) &status : NULL), options, (struct rusage __user *) &r); set_fs (old_fs); if (ret > 0) { if (put_compat_rusage(&r, ru)) return -EFAULT; if (stat_addr && put_user(status, stat_addr)) return -EFAULT; } return ret; } } asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, struct compat_siginfo __user *uinfo, int options, struct compat_rusage __user *uru) { siginfo_t info; struct rusage ru; long ret; mm_segment_t old_fs = get_fs(); memset(&info, 0, sizeof(info)); set_fs(KERNEL_DS); ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, uru ? (struct rusage __user *)&ru : NULL); set_fs(old_fs); if ((ret < 0) || (info.si_signo == 0)) return ret; if (uru) { ret = put_compat_rusage(&ru, uru); if (ret) return ret; } BUG_ON(info.si_code & __SI_MASK); info.si_code |= __SI_CHLD; return copy_siginfo_to_user32(uinfo, &info); } static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, |
a45185d2d cpumask: convert ... |
579 |
unsigned len, struct cpumask *new_mask) |
1da177e4c Linux-2.6.12-rc2 |
580 581 |
{ unsigned long *k; |
a45185d2d cpumask: convert ... |
582 583 584 585 |
if (len < cpumask_size()) memset(new_mask, 0, cpumask_size()); else if (len > cpumask_size()) len = cpumask_size(); |
1da177e4c Linux-2.6.12-rc2 |
586 |
|
a45185d2d cpumask: convert ... |
587 |
k = cpumask_bits(new_mask); |
1da177e4c Linux-2.6.12-rc2 |
588 589 590 591 592 593 594 |
return compat_get_bitmap(k, user_mask_ptr, len * 8); } asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, unsigned int len, compat_ulong_t __user *user_mask_ptr) { |
a45185d2d cpumask: convert ... |
595 |
cpumask_var_t new_mask; |
1da177e4c Linux-2.6.12-rc2 |
596 |
int retval; |
a45185d2d cpumask: convert ... |
597 598 599 600 |
if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) return -ENOMEM; retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask); |
1da177e4c Linux-2.6.12-rc2 |
601 |
if (retval) |
a45185d2d cpumask: convert ... |
602 |
goto out; |
1da177e4c Linux-2.6.12-rc2 |
603 |
|
a45185d2d cpumask: convert ... |
604 605 606 607 |
retval = sched_setaffinity(pid, new_mask); out: free_cpumask_var(new_mask); return retval; |
1da177e4c Linux-2.6.12-rc2 |
608 609 610 611 612 613 |
} asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, compat_ulong_t __user *user_mask_ptr) { int ret; |
a45185d2d cpumask: convert ... |
614 |
cpumask_var_t mask; |
1da177e4c Linux-2.6.12-rc2 |
615 |
|
fa9dc265a cpumask: fix comp... |
616 617 618 |
if ((len * BITS_PER_BYTE) < nr_cpu_ids) return -EINVAL; if (len & (sizeof(compat_ulong_t)-1)) |
1da177e4c Linux-2.6.12-rc2 |
619 |
return -EINVAL; |
a45185d2d cpumask: convert ... |
620 621 622 623 |
if (!alloc_cpumask_var(&mask, GFP_KERNEL)) return -ENOMEM; ret = sched_getaffinity(pid, mask); |
fa9dc265a cpumask: fix comp... |
624 625 |
if (ret == 0) { size_t retlen = min_t(size_t, len, cpumask_size()); |
1da177e4c Linux-2.6.12-rc2 |
626 |
|
fa9dc265a cpumask: fix comp... |
627 628 629 630 631 |
if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8)) ret = -EFAULT; else ret = retlen; } |
a45185d2d cpumask: convert ... |
632 |
free_cpumask_var(mask); |
fa9dc265a cpumask: fix comp... |
633 |
|
a45185d2d cpumask: convert ... |
634 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
635 |
} |
83f5d1266 signal/timer/even... |
636 637 |
int get_compat_itimerspec(struct itimerspec *dst, const struct compat_itimerspec __user *src) |
bd3a8492b whitespace fixes:... |
638 |
{ |
1da177e4c Linux-2.6.12-rc2 |
639 640 641 642 |
if (get_compat_timespec(&dst->it_interval, &src->it_interval) || get_compat_timespec(&dst->it_value, &src->it_value)) return -EFAULT; return 0; |
bd3a8492b whitespace fixes:... |
643 |
} |
1da177e4c Linux-2.6.12-rc2 |
644 |
|
83f5d1266 signal/timer/even... |
645 646 |
int put_compat_itimerspec(struct compat_itimerspec __user *dst, const struct itimerspec *src) |
bd3a8492b whitespace fixes:... |
647 |
{ |
1da177e4c Linux-2.6.12-rc2 |
648 649 650 651 |
if (put_compat_timespec(&src->it_interval, &dst->it_interval) || put_compat_timespec(&src->it_value, &dst->it_value)) return -EFAULT; return 0; |
bd3a8492b whitespace fixes:... |
652 |
} |
1da177e4c Linux-2.6.12-rc2 |
653 |
|
3a0f69d59 [PATCH] common co... |
654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 |
long compat_sys_timer_create(clockid_t which_clock, struct compat_sigevent __user *timer_event_spec, timer_t __user *created_timer_id) { struct sigevent __user *event = NULL; if (timer_event_spec) { struct sigevent kevent; event = compat_alloc_user_space(sizeof(*event)); if (get_compat_sigevent(&kevent, timer_event_spec) || copy_to_user(event, &kevent, sizeof(*event))) return -EFAULT; } return sys_timer_create(which_clock, event, created_timer_id); } |
1da177e4c Linux-2.6.12-rc2 |
671 |
long compat_sys_timer_settime(timer_t timer_id, int flags, |
bd3a8492b whitespace fixes:... |
672 |
struct compat_itimerspec __user *new, |
1da177e4c Linux-2.6.12-rc2 |
673 |
struct compat_itimerspec __user *old) |
bd3a8492b whitespace fixes:... |
674 |
{ |
1da177e4c Linux-2.6.12-rc2 |
675 676 677 678 679 680 681 |
long err; mm_segment_t oldfs; struct itimerspec newts, oldts; if (!new) return -EINVAL; if (get_compat_itimerspec(&newts, new)) |
bd3a8492b whitespace fixes:... |
682 |
return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
683 684 685 686 687 |
oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_timer_settime(timer_id, flags, (struct itimerspec __user *) &newts, (struct itimerspec __user *) &oldts); |
bd3a8492b whitespace fixes:... |
688 |
set_fs(oldfs); |
1da177e4c Linux-2.6.12-rc2 |
689 690 691 |
if (!err && old && put_compat_itimerspec(old, &oldts)) return -EFAULT; return err; |
bd3a8492b whitespace fixes:... |
692 |
} |
1da177e4c Linux-2.6.12-rc2 |
693 694 695 |
long compat_sys_timer_gettime(timer_t timer_id, struct compat_itimerspec __user *setting) |
bd3a8492b whitespace fixes:... |
696 |
{ |
1da177e4c Linux-2.6.12-rc2 |
697 698 |
long err; mm_segment_t oldfs; |
bd3a8492b whitespace fixes:... |
699 |
struct itimerspec ts; |
1da177e4c Linux-2.6.12-rc2 |
700 701 702 703 |
oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_timer_gettime(timer_id, |
bd3a8492b whitespace fixes:... |
704 705 |
(struct itimerspec __user *) &ts); set_fs(oldfs); |
1da177e4c Linux-2.6.12-rc2 |
706 707 708 |
if (!err && put_compat_itimerspec(setting, &ts)) return -EFAULT; return err; |
bd3a8492b whitespace fixes:... |
709 |
} |
1da177e4c Linux-2.6.12-rc2 |
710 711 712 713 714 715 |
long compat_sys_clock_settime(clockid_t which_clock, struct compat_timespec __user *tp) { long err; mm_segment_t oldfs; |
bd3a8492b whitespace fixes:... |
716 |
struct timespec ts; |
1da177e4c Linux-2.6.12-rc2 |
717 718 |
if (get_compat_timespec(&ts, tp)) |
bd3a8492b whitespace fixes:... |
719 |
return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
720 |
oldfs = get_fs(); |
bd3a8492b whitespace fixes:... |
721 |
set_fs(KERNEL_DS); |
1da177e4c Linux-2.6.12-rc2 |
722 723 724 725 |
err = sys_clock_settime(which_clock, (struct timespec __user *) &ts); set_fs(oldfs); return err; |
bd3a8492b whitespace fixes:... |
726 |
} |
1da177e4c Linux-2.6.12-rc2 |
727 728 729 730 731 732 |
long compat_sys_clock_gettime(clockid_t which_clock, struct compat_timespec __user *tp) { long err; mm_segment_t oldfs; |
bd3a8492b whitespace fixes:... |
733 |
struct timespec ts; |
1da177e4c Linux-2.6.12-rc2 |
734 735 736 737 738 739 740 |
oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_clock_gettime(which_clock, (struct timespec __user *) &ts); set_fs(oldfs); if (!err && put_compat_timespec(&ts, tp)) |
bd3a8492b whitespace fixes:... |
741 |
return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
742 |
return err; |
bd3a8492b whitespace fixes:... |
743 |
} |
1da177e4c Linux-2.6.12-rc2 |
744 |
|
f1f1d5ebd posix-timers: Int... |
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 |
long compat_sys_clock_adjtime(clockid_t which_clock, struct compat_timex __user *utp) { struct timex txc; mm_segment_t oldfs; int err, ret; err = compat_get_timex(&txc, utp); if (err) return err; oldfs = get_fs(); set_fs(KERNEL_DS); ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc); set_fs(oldfs); err = compat_put_timex(utp, &txc); if (err) return err; return ret; } |
1da177e4c Linux-2.6.12-rc2 |
767 768 769 770 771 |
long compat_sys_clock_getres(clockid_t which_clock, struct compat_timespec __user *tp) { long err; mm_segment_t oldfs; |
bd3a8492b whitespace fixes:... |
772 |
struct timespec ts; |
1da177e4c Linux-2.6.12-rc2 |
773 774 775 776 777 778 779 |
oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_clock_getres(which_clock, (struct timespec __user *) &ts); set_fs(oldfs); if (!err && tp && put_compat_timespec(&ts, tp)) |
bd3a8492b whitespace fixes:... |
780 |
return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
781 |
return err; |
bd3a8492b whitespace fixes:... |
782 |
} |
1da177e4c Linux-2.6.12-rc2 |
783 |
|
1711ef386 [PATCH] posix-tim... |
784 785 786 787 788 |
static long compat_clock_nanosleep_restart(struct restart_block *restart) { long err; mm_segment_t oldfs; struct timespec tu; |
029a07e03 hrtimer: use nano... |
789 |
struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp; |
1711ef386 [PATCH] posix-tim... |
790 |
|
029a07e03 hrtimer: use nano... |
791 |
restart->nanosleep.rmtp = (struct timespec __user *) &tu; |
1711ef386 [PATCH] posix-tim... |
792 793 794 795 796 797 798 799 800 801 802 |
oldfs = get_fs(); set_fs(KERNEL_DS); err = clock_nanosleep_restart(restart); set_fs(oldfs); if ((err == -ERESTART_RESTARTBLOCK) && rmtp && put_compat_timespec(&tu, rmtp)) return -EFAULT; if (err == -ERESTART_RESTARTBLOCK) { restart->fn = compat_clock_nanosleep_restart; |
029a07e03 hrtimer: use nano... |
803 |
restart->nanosleep.compat_rmtp = rmtp; |
1711ef386 [PATCH] posix-tim... |
804 805 806 |
} return err; } |
1da177e4c Linux-2.6.12-rc2 |
807 808 809 810 811 812 |
long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, struct compat_timespec __user *rqtp, struct compat_timespec __user *rmtp) { long err; mm_segment_t oldfs; |
bd3a8492b whitespace fixes:... |
813 |
struct timespec in, out; |
1711ef386 [PATCH] posix-tim... |
814 |
struct restart_block *restart; |
1da177e4c Linux-2.6.12-rc2 |
815 |
|
bd3a8492b whitespace fixes:... |
816 |
if (get_compat_timespec(&in, rqtp)) |
1da177e4c Linux-2.6.12-rc2 |
817 818 819 820 821 822 823 824 |
return -EFAULT; oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_clock_nanosleep(which_clock, flags, (struct timespec __user *) &in, (struct timespec __user *) &out); set_fs(oldfs); |
1711ef386 [PATCH] posix-tim... |
825 |
|
1da177e4c Linux-2.6.12-rc2 |
826 827 828 |
if ((err == -ERESTART_RESTARTBLOCK) && rmtp && put_compat_timespec(&out, rmtp)) return -EFAULT; |
1711ef386 [PATCH] posix-tim... |
829 830 831 832 |
if (err == -ERESTART_RESTARTBLOCK) { restart = ¤t_thread_info()->restart_block; restart->fn = compat_clock_nanosleep_restart; |
029a07e03 hrtimer: use nano... |
833 |
restart->nanosleep.compat_rmtp = rmtp; |
1711ef386 [PATCH] posix-tim... |
834 |
} |
bd3a8492b whitespace fixes:... |
835 836 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
837 838 839 840 841 842 843 844 845 846 847 |
/* * We currently only need the following fields from the sigevent * structure: sigev_value, sigev_signo, sig_notify and (sometimes * sigev_notify_thread_id). The others are handled in user mode. * We also assume that copying sigev_value.sival_int is sufficient * to keep all the bits of sigev_value.sival_ptr intact. */ int get_compat_sigevent(struct sigevent *event, const struct compat_sigevent __user *u_event) { |
51410d3c5 [PATCH] Fix get_c... |
848 |
memset(event, 0, sizeof(*event)); |
1da177e4c Linux-2.6.12-rc2 |
849 850 851 852 853 854 855 856 857 |
return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || __get_user(event->sigev_value.sival_int, &u_event->sigev_value.sival_int) || __get_user(event->sigev_signo, &u_event->sigev_signo) || __get_user(event->sigev_notify, &u_event->sigev_notify) || __get_user(event->sigev_notify_thread_id, &u_event->sigev_notify_thread_id)) ? -EFAULT : 0; } |
5fa3839a6 [PATCH] Constify ... |
858 |
long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
1da177e4c Linux-2.6.12-rc2 |
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 |
unsigned long bitmap_size) { int i, j; unsigned long m; compat_ulong_t um; unsigned long nr_compat_longs; /* align bitmap up to nearest compat_long_t boundary */ bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) return -EFAULT; nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { m = 0; for (j = 0; j < sizeof(m)/sizeof(um); j++) { /* * We dont want to read past the end of the userspace * bitmap. We must however ensure the end of the * kernel bitmap is zeroed. */ if (nr_compat_longs-- > 0) { if (__get_user(um, umask)) return -EFAULT; } else { um = 0; } umask++; m |= (long)um << (j * BITS_PER_COMPAT_LONG); } *mask++ = m; } return 0; } long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, unsigned long bitmap_size) { int i, j; unsigned long m; compat_ulong_t um; unsigned long nr_compat_longs; /* align bitmap up to nearest compat_long_t boundary */ bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) return -EFAULT; nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { m = *mask++; for (j = 0; j < sizeof(m)/sizeof(um); j++) { um = m; /* * We dont want to write past the end of the userspace * bitmap. */ if (nr_compat_longs-- > 0) { if (__put_user(um, umask)) return -EFAULT; } umask++; m >>= 4*sizeof(um); m >>= 4*sizeof(um); } } return 0; } void sigset_from_compat (sigset_t *set, compat_sigset_t *compat) { switch (_NSIG_WORDS) { |
1da177e4c Linux-2.6.12-rc2 |
943 944 945 946 |
case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); |
1da177e4c Linux-2.6.12-rc2 |
947 948 |
} } |
1dda606c5 KVM: Add compat i... |
949 |
EXPORT_SYMBOL_GPL(sigset_from_compat); |
1da177e4c Linux-2.6.12-rc2 |
950 951 952 953 954 955 956 957 |
asmlinkage long compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, struct compat_siginfo __user *uinfo, struct compat_timespec __user *uts, compat_size_t sigsetsize) { compat_sigset_t s32; sigset_t s; |
1da177e4c Linux-2.6.12-rc2 |
958 959 |
struct timespec t; siginfo_t info; |
943df1485 signal: introduce... |
960 |
long ret; |
1da177e4c Linux-2.6.12-rc2 |
961 962 963 964 965 966 967 |
if (sigsetsize != sizeof(sigset_t)) return -EINVAL; if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) return -EFAULT; sigset_from_compat(&s, &s32); |
1da177e4c Linux-2.6.12-rc2 |
968 969 |
if (uts) { |
943df1485 signal: introduce... |
970 |
if (get_compat_timespec(&t, uts)) |
1da177e4c Linux-2.6.12-rc2 |
971 |
return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
972 |
} |
943df1485 signal: introduce... |
973 |
ret = do_sigtimedwait(&s, &info, uts ? &t : NULL); |
1da177e4c Linux-2.6.12-rc2 |
974 |
|
943df1485 signal: introduce... |
975 976 977 |
if (ret > 0 && uinfo) { if (copy_siginfo_to_user32(uinfo, &info)) ret = -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
978 |
} |
943df1485 signal: introduce... |
979 |
|
1da177e4c Linux-2.6.12-rc2 |
980 981 982 |
return ret; } |
62ab4505e signals: implemen... |
983 984 985 986 987 988 989 990 991 992 |
asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, struct compat_siginfo __user *uinfo) { siginfo_t info; if (copy_siginfo_from_user32(&info, uinfo)) return -EFAULT; return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); } |
1da177e4c Linux-2.6.12-rc2 |
993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 |
#ifdef __ARCH_WANT_COMPAT_SYS_TIME /* compat_time_t is a 32 bit "long" and needs to get converted. */ asmlinkage long compat_sys_time(compat_time_t __user * tloc) { compat_time_t i; struct timeval tv; do_gettimeofday(&tv); i = tv.tv_sec; if (tloc) { if (put_user(i,tloc)) |
e3d5a27d5 Allow times and t... |
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return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
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} |
e3d5a27d5 Allow times and t... |
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force_successful_syscall_return(); |
1da177e4c Linux-2.6.12-rc2 |
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return i; } asmlinkage long compat_sys_stime(compat_time_t __user *tptr) { struct timespec tv; int err; if (get_user(tv.tv_sec, tptr)) return -EFAULT; tv.tv_nsec = 0; err = security_settime(&tv, NULL); if (err) return err; do_settimeofday(&tv); return 0; } #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ |
150256d8a [PATCH] Generic s... |
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#ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) { sigset_t newset; compat_sigset_t newset32; /* XXX: Don't preclude handling different sized sigset_t's. */ if (sigsetsize != sizeof(sigset_t)) return -EINVAL; if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) return -EFAULT; sigset_from_compat(&newset, &newset32); |
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return sigsuspend(&newset); |
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} #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ |
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asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) { struct timex txc; |
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int err, ret; |
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|
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err = compat_get_timex(&txc, utp); if (err) return err; |
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ret = do_adjtimex(&txc); |
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err = compat_put_timex(utp, &txc); if (err) return err; |
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return ret; } |
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#ifdef CONFIG_NUMA asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, |
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compat_uptr_t __user *pages32, |
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const int __user *nodes, int __user *status, int flags) { const void __user * __user *pages; int i; pages = compat_alloc_user_space(nr_pages * sizeof(void *)); for (i = 0; i < nr_pages; i++) { compat_uptr_t p; |
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if (get_user(p, pages32 + i) || |
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put_user(compat_ptr(p), pages + i)) return -EFAULT; } return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); } |
3fd593979 [PATCH] Create co... |
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asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, const compat_ulong_t __user *new_nodes) { unsigned long __user *old = NULL; unsigned long __user *new = NULL; nodemask_t tmp_mask; unsigned long nr_bits; unsigned long size; nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES); size = ALIGN(nr_bits, BITS_PER_LONG) / 8; if (old_nodes) { if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits)) return -EFAULT; old = compat_alloc_user_space(new_nodes ? size * 2 : size); if (new_nodes) new = old + size / sizeof(unsigned long); if (copy_to_user(old, nodes_addr(tmp_mask), size)) return -EFAULT; } if (new_nodes) { if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits)) return -EFAULT; if (new == NULL) new = compat_alloc_user_space(size); if (copy_to_user(new, nodes_addr(tmp_mask), size)) return -EFAULT; } return sys_migrate_pages(pid, nr_bits + 1, old, new); } |
1b2db9fb7 [PATCH] sys_move_... |
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#endif |
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struct compat_sysinfo { s32 uptime; u32 loads[3]; u32 totalram; u32 freeram; u32 sharedram; u32 bufferram; u32 totalswap; u32 freeswap; u16 procs; u16 pad; u32 totalhigh; u32 freehigh; u32 mem_unit; char _f[20-2*sizeof(u32)-sizeof(int)]; }; asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info) { struct sysinfo s; do_sysinfo(&s); /* Check to see if any memory value is too large for 32-bit and scale * down if needed */ if ((s.totalram >> 32) || (s.totalswap >> 32)) { int bitcount = 0; while (s.mem_unit < PAGE_SIZE) { s.mem_unit <<= 1; bitcount++; } s.totalram >>= bitcount; s.freeram >>= bitcount; s.sharedram >>= bitcount; s.bufferram >>= bitcount; s.totalswap >>= bitcount; s.freeswap >>= bitcount; s.totalhigh >>= bitcount; s.freehigh >>= bitcount; } if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) || __put_user (s.uptime, &info->uptime) || __put_user (s.loads[0], &info->loads[0]) || __put_user (s.loads[1], &info->loads[1]) || __put_user (s.loads[2], &info->loads[2]) || __put_user (s.totalram, &info->totalram) || __put_user (s.freeram, &info->freeram) || __put_user (s.sharedram, &info->sharedram) || __put_user (s.bufferram, &info->bufferram) || __put_user (s.totalswap, &info->totalswap) || __put_user (s.freeswap, &info->freeswap) || __put_user (s.procs, &info->procs) || __put_user (s.totalhigh, &info->totalhigh) || __put_user (s.freehigh, &info->freehigh) || __put_user (s.mem_unit, &info->mem_unit)) return -EFAULT; return 0; } |
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/* * Allocate user-space memory for the duration of a single system call, * in order to marshall parameters inside a compat thunk. */ void __user *compat_alloc_user_space(unsigned long len) { void __user *ptr; /* If len would occupy more than half of the entire compat space... */ if (unlikely(len > (((compat_uptr_t)~0) >> 1))) return NULL; ptr = arch_compat_alloc_user_space(len); if (unlikely(!access_ok(VERIFY_WRITE, ptr, len))) return NULL; return ptr; } EXPORT_SYMBOL_GPL(compat_alloc_user_space); |