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kernel/compat.c
28.4 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/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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/* * Note that the native side is already converted to a timespec, because * that's what we want anyway. */ static int compat_get_timeval(struct timespec *o, struct compat_timeval __user *i) { 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; } static int compat_put_timeval(struct compat_timeval __user *o, struct timeval *i) { return (put_user(i->tv_sec, &o->tv_sec) || put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; } asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) { if (tv) { struct timeval ktv; do_gettimeofday(&ktv); if (compat_put_timeval(tv, &ktv)) 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) { if (compat_get_timeval(&kts, tv)) 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_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; } 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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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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|
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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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|
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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); } /* * 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; } asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set, compat_old_sigset_t __user *oset) { old_sigset_t s; long ret; mm_segment_t old_fs; if (set && get_user(s, set)) return -EFAULT; old_fs = get_fs(); set_fs(KERNEL_DS); ret = sys_sigprocmask(how, set ? (old_sigset_t __user *) &s : NULL, oset ? (old_sigset_t __user *) &s : NULL); set_fs(old_fs); if (ret == 0) if (oset) ret = put_user(s, oset); return ret; } |
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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, |
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unsigned len, struct cpumask *new_mask) |
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{ unsigned long *k; |
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if (len < cpumask_size()) memset(new_mask, 0, cpumask_size()); else if (len > cpumask_size()) len = cpumask_size(); |
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|
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k = cpumask_bits(new_mask); |
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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) { |
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cpumask_var_t new_mask; |
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int retval; |
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if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) return -ENOMEM; retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask); |
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if (retval) |
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goto out; |
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|
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retval = sched_setaffinity(pid, new_mask); out: free_cpumask_var(new_mask); return retval; |
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} asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, compat_ulong_t __user *user_mask_ptr) { int ret; |
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cpumask_var_t mask; |
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|
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if ((len * BITS_PER_BYTE) < nr_cpu_ids) return -EINVAL; if (len & (sizeof(compat_ulong_t)-1)) |
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return -EINVAL; |
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if (!alloc_cpumask_var(&mask, GFP_KERNEL)) return -ENOMEM; ret = sched_getaffinity(pid, mask); |
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if (ret == 0) { size_t retlen = min_t(size_t, len, cpumask_size()); |
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|
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if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8)) ret = -EFAULT; else ret = retlen; } |
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free_cpumask_var(mask); |
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|
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return ret; |
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} |
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int get_compat_itimerspec(struct itimerspec *dst, const struct compat_itimerspec __user *src) |
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{ |
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if (get_compat_timespec(&dst->it_interval, &src->it_interval) || get_compat_timespec(&dst->it_value, &src->it_value)) return -EFAULT; return 0; |
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} |
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|
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int put_compat_itimerspec(struct compat_itimerspec __user *dst, const struct itimerspec *src) |
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{ |
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if (put_compat_timespec(&src->it_interval, &dst->it_interval) || put_compat_timespec(&src->it_value, &dst->it_value)) return -EFAULT; return 0; |
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} |
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|
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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); } |
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long compat_sys_timer_settime(timer_t timer_id, int flags, |
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struct compat_itimerspec __user *new, |
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struct compat_itimerspec __user *old) |
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{ |
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long err; mm_segment_t oldfs; struct itimerspec newts, oldts; if (!new) return -EINVAL; if (get_compat_itimerspec(&newts, new)) |
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return -EFAULT; |
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oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_timer_settime(timer_id, flags, (struct itimerspec __user *) &newts, (struct itimerspec __user *) &oldts); |
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set_fs(oldfs); |
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if (!err && old && put_compat_itimerspec(old, &oldts)) return -EFAULT; return err; |
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} |
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long compat_sys_timer_gettime(timer_t timer_id, struct compat_itimerspec __user *setting) |
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{ |
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long err; mm_segment_t oldfs; |
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struct itimerspec ts; |
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oldfs = get_fs(); set_fs(KERNEL_DS); err = sys_timer_gettime(timer_id, |
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(struct itimerspec __user *) &ts); set_fs(oldfs); |
1da177e4c Linux-2.6.12-rc2 |
566 567 568 |
if (!err && put_compat_itimerspec(setting, &ts)) return -EFAULT; return err; |
bd3a8492b whitespace fixes:... |
569 |
} |
1da177e4c Linux-2.6.12-rc2 |
570 571 572 573 574 575 |
long compat_sys_clock_settime(clockid_t which_clock, struct compat_timespec __user *tp) { long err; mm_segment_t oldfs; |
bd3a8492b whitespace fixes:... |
576 |
struct timespec ts; |
1da177e4c Linux-2.6.12-rc2 |
577 578 |
if (get_compat_timespec(&ts, tp)) |
bd3a8492b whitespace fixes:... |
579 |
return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
580 |
oldfs = get_fs(); |
bd3a8492b whitespace fixes:... |
581 |
set_fs(KERNEL_DS); |
1da177e4c Linux-2.6.12-rc2 |
582 583 584 585 |
err = sys_clock_settime(which_clock, (struct timespec __user *) &ts); set_fs(oldfs); return err; |
bd3a8492b whitespace fixes:... |
586 |
} |
1da177e4c Linux-2.6.12-rc2 |
587 588 589 590 591 592 |
long compat_sys_clock_gettime(clockid_t which_clock, struct compat_timespec __user *tp) { long err; mm_segment_t oldfs; |
bd3a8492b whitespace fixes:... |
593 |
struct timespec ts; |
1da177e4c Linux-2.6.12-rc2 |
594 595 596 597 598 599 600 |
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:... |
601 |
return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
602 |
return err; |
bd3a8492b whitespace fixes:... |
603 |
} |
1da177e4c Linux-2.6.12-rc2 |
604 605 606 607 608 609 |
long compat_sys_clock_getres(clockid_t which_clock, struct compat_timespec __user *tp) { long err; mm_segment_t oldfs; |
bd3a8492b whitespace fixes:... |
610 |
struct timespec ts; |
1da177e4c Linux-2.6.12-rc2 |
611 612 613 614 615 616 617 |
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:... |
618 |
return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
619 |
return err; |
bd3a8492b whitespace fixes:... |
620 |
} |
1da177e4c Linux-2.6.12-rc2 |
621 |
|
1711ef386 [PATCH] posix-tim... |
622 623 624 625 626 |
static long compat_clock_nanosleep_restart(struct restart_block *restart) { long err; mm_segment_t oldfs; struct timespec tu; |
029a07e03 hrtimer: use nano... |
627 |
struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp; |
1711ef386 [PATCH] posix-tim... |
628 |
|
029a07e03 hrtimer: use nano... |
629 |
restart->nanosleep.rmtp = (struct timespec __user *) &tu; |
1711ef386 [PATCH] posix-tim... |
630 631 632 633 634 635 636 637 638 639 640 |
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... |
641 |
restart->nanosleep.compat_rmtp = rmtp; |
1711ef386 [PATCH] posix-tim... |
642 643 644 |
} return err; } |
1da177e4c Linux-2.6.12-rc2 |
645 646 647 648 649 650 |
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:... |
651 |
struct timespec in, out; |
1711ef386 [PATCH] posix-tim... |
652 |
struct restart_block *restart; |
1da177e4c Linux-2.6.12-rc2 |
653 |
|
bd3a8492b whitespace fixes:... |
654 |
if (get_compat_timespec(&in, rqtp)) |
1da177e4c Linux-2.6.12-rc2 |
655 656 657 658 659 660 661 662 |
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... |
663 |
|
1da177e4c Linux-2.6.12-rc2 |
664 665 666 |
if ((err == -ERESTART_RESTARTBLOCK) && rmtp && put_compat_timespec(&out, rmtp)) return -EFAULT; |
1711ef386 [PATCH] posix-tim... |
667 668 669 670 |
if (err == -ERESTART_RESTARTBLOCK) { restart = ¤t_thread_info()->restart_block; restart->fn = compat_clock_nanosleep_restart; |
029a07e03 hrtimer: use nano... |
671 |
restart->nanosleep.compat_rmtp = rmtp; |
1711ef386 [PATCH] posix-tim... |
672 |
} |
bd3a8492b whitespace fixes:... |
673 674 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
675 676 677 678 679 680 681 682 683 684 685 |
/* * 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... |
686 |
memset(event, 0, sizeof(*event)); |
1da177e4c Linux-2.6.12-rc2 |
687 688 689 690 691 692 693 694 695 |
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 ... |
696 |
long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
1da177e4c Linux-2.6.12-rc2 |
697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 |
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 |
781 782 783 784 |
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 |
785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 |
} } 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; int sig; struct timespec t; siginfo_t info; long ret, timeout = 0; if (sigsetsize != sizeof(sigset_t)) return -EINVAL; if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) return -EFAULT; sigset_from_compat(&s, &s32); sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP)); signotset(&s); if (uts) { if (get_compat_timespec (&t, uts)) return -EFAULT; if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0 || t.tv_sec < 0) return -EINVAL; } spin_lock_irq(¤t->sighand->siglock); sig = dequeue_signal(current, &s, &info); if (!sig) { timeout = MAX_SCHEDULE_TIMEOUT; if (uts) timeout = timespec_to_jiffies(&t) +(t.tv_sec || t.tv_nsec); if (timeout) { current->real_blocked = current->blocked; sigandsets(¤t->blocked, ¤t->blocked, &s); recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); |
75bcc8c5e [PATCH] kernel: f... |
830 |
timeout = schedule_timeout_interruptible(timeout); |
1da177e4c Linux-2.6.12-rc2 |
831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 |
spin_lock_irq(¤t->sighand->siglock); sig = dequeue_signal(current, &s, &info); current->blocked = current->real_blocked; siginitset(¤t->real_blocked, 0); recalc_sigpending(); } } spin_unlock_irq(¤t->sighand->siglock); if (sig) { ret = sig; if (uinfo) { if (copy_siginfo_to_user32(uinfo, &info)) ret = -EFAULT; } }else { ret = timeout?-EINTR:-EAGAIN; } return ret; } |
62ab4505e signals: implemen... |
853 854 855 856 857 858 859 860 861 862 |
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 |
863 864 865 866 867 868 869 870 871 872 873 874 875 876 |
#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... |
877 |
return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
878 |
} |
e3d5a27d5 Allow times and t... |
879 |
force_successful_syscall_return(); |
1da177e4c Linux-2.6.12-rc2 |
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 |
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... |
902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 |
#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); sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); spin_lock_irq(¤t->sighand->siglock); current->saved_sigmask = current->blocked; current->blocked = newset; recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); current->state = TASK_INTERRUPTIBLE; schedule(); |
4e4c22c71 signals: add set_... |
926 |
set_restore_sigmask(); |
150256d8a [PATCH] Generic s... |
927 928 929 |
return -ERESTARTNOHAND; } #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ |
3158e9411 [PATCH] consolida... |
930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 |
asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) { struct timex txc; int ret; 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; ret = do_adjtimex(&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) || |
153b5d054 ntp: support for TAI |
983 984 |
__put_user(txc.stbcnt, &utp->stbcnt) || __put_user(txc.tai, &utp->tai)) |
3158e9411 [PATCH] consolida... |
985 986 987 988 |
ret = -EFAULT; return ret; } |
1b2db9fb7 [PATCH] sys_move_... |
989 990 991 |
#ifdef CONFIG_NUMA asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, |
9216dfad4 [PATCH] move_page... |
992 |
compat_uptr_t __user *pages32, |
1b2db9fb7 [PATCH] sys_move_... |
993 994 995 996 997 998 999 1000 1001 1002 |
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; |
9216dfad4 [PATCH] move_page... |
1003 |
if (get_user(p, pages32 + i) || |
1b2db9fb7 [PATCH] sys_move_... |
1004 1005 1006 1007 1008 |
put_user(compat_ptr(p), pages + i)) return -EFAULT; } return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); } |
3fd593979 [PATCH] Create co... |
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 |
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_... |
1042 |
#endif |
d4d23add3 [PATCH] Common co... |
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 |
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; } |
c41d68a51 compat: Make comp... |
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 |
/* * 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); |