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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [sparc64/] [kernel/] [sys_sparc32.c] - Rev 3
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/* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls. * * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net) * * These routines maintain argument size conversion between 32bit and 64bit * environment. */ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/capability.h> #include <linux/fs.h> #include <linux/mm.h> #include <linux/file.h> #include <linux/signal.h> #include <linux/resource.h> #include <linux/times.h> #include <linux/utsname.h> #include <linux/smp.h> #include <linux/smp_lock.h> #include <linux/sem.h> #include <linux/msg.h> #include <linux/shm.h> #include <linux/slab.h> #include <linux/uio.h> #include <linux/nfs_fs.h> #include <linux/quota.h> #include <linux/module.h> #include <linux/sunrpc/svc.h> #include <linux/nfsd/nfsd.h> #include <linux/nfsd/cache.h> #include <linux/nfsd/xdr.h> #include <linux/nfsd/syscall.h> #include <linux/poll.h> #include <linux/personality.h> #include <linux/stat.h> #include <linux/filter.h> #include <linux/highmem.h> #include <linux/highuid.h> #include <linux/mman.h> #include <linux/ipv6.h> #include <linux/in.h> #include <linux/icmpv6.h> #include <linux/syscalls.h> #include <linux/sysctl.h> #include <linux/binfmts.h> #include <linux/dnotify.h> #include <linux/security.h> #include <linux/compat.h> #include <linux/vfs.h> #include <linux/netfilter_ipv4/ip_tables.h> #include <linux/ptrace.h> #include <asm/types.h> #include <asm/uaccess.h> #include <asm/fpumacro.h> #include <asm/semaphore.h> #include <asm/mmu_context.h> #include <asm/a.out.h> #include <asm/compat_signal.h> asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group) { return sys_chown(filename, low2highuid(user), low2highgid(group)); } asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group) { return sys_lchown(filename, low2highuid(user), low2highgid(group)); } asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group) { return sys_fchown(fd, low2highuid(user), low2highgid(group)); } asmlinkage long sys32_setregid16(u16 rgid, u16 egid) { return sys_setregid(low2highgid(rgid), low2highgid(egid)); } asmlinkage long sys32_setgid16(u16 gid) { return sys_setgid((gid_t)gid); } asmlinkage long sys32_setreuid16(u16 ruid, u16 euid) { return sys_setreuid(low2highuid(ruid), low2highuid(euid)); } asmlinkage long sys32_setuid16(u16 uid) { return sys_setuid((uid_t)uid); } asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid) { return sys_setresuid(low2highuid(ruid), low2highuid(euid), low2highuid(suid)); } asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid) { int retval; if (!(retval = put_user(high2lowuid(current->uid), ruid)) && !(retval = put_user(high2lowuid(current->euid), euid))) retval = put_user(high2lowuid(current->suid), suid); return retval; } asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid) { return sys_setresgid(low2highgid(rgid), low2highgid(egid), low2highgid(sgid)); } asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid) { int retval; if (!(retval = put_user(high2lowgid(current->gid), rgid)) && !(retval = put_user(high2lowgid(current->egid), egid))) retval = put_user(high2lowgid(current->sgid), sgid); return retval; } asmlinkage long sys32_setfsuid16(u16 uid) { return sys_setfsuid((uid_t)uid); } asmlinkage long sys32_setfsgid16(u16 gid) { return sys_setfsgid((gid_t)gid); } static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info) { int i; u16 group; for (i = 0; i < group_info->ngroups; i++) { group = (u16)GROUP_AT(group_info, i); if (put_user(group, grouplist+i)) return -EFAULT; } return 0; } static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist) { int i; u16 group; for (i = 0; i < group_info->ngroups; i++) { if (get_user(group, grouplist+i)) return -EFAULT; GROUP_AT(group_info, i) = (gid_t)group; } return 0; } asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist) { int i; if (gidsetsize < 0) return -EINVAL; get_group_info(current->group_info); i = current->group_info->ngroups; if (gidsetsize) { if (i > gidsetsize) { i = -EINVAL; goto out; } if (groups16_to_user(grouplist, current->group_info)) { i = -EFAULT; goto out; } } out: put_group_info(current->group_info); return i; } asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist) { struct group_info *group_info; int retval; if (!capable(CAP_SETGID)) return -EPERM; if ((unsigned)gidsetsize > NGROUPS_MAX) return -EINVAL; group_info = groups_alloc(gidsetsize); if (!group_info) return -ENOMEM; retval = groups16_from_user(group_info, grouplist); if (retval) { put_group_info(group_info); return retval; } retval = set_current_groups(group_info); put_group_info(group_info); return retval; } asmlinkage long sys32_getuid16(void) { return high2lowuid(current->uid); } asmlinkage long sys32_geteuid16(void) { return high2lowuid(current->euid); } asmlinkage long sys32_getgid16(void) { return high2lowgid(current->gid); } asmlinkage long sys32_getegid16(void) { return high2lowgid(current->egid); } /* 32-bit timeval and related flotsam. */ static long get_tv32(struct timeval *o, struct compat_timeval __user *i) { return (!access_ok(VERIFY_READ, i, sizeof(*i)) || (__get_user(o->tv_sec, &i->tv_sec) | __get_user(o->tv_usec, &i->tv_usec))); } static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i) { return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || (__put_user(i->tv_sec, &o->tv_sec) | __put_user(i->tv_usec, &o->tv_usec))); } #ifdef CONFIG_SYSVIPC asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth) { int version; version = call >> 16; /* hack for backward compatibility */ call &= 0xffff; switch (call) { case SEMTIMEDOP: if (fifth) /* sign extend semid */ return compat_sys_semtimedop((int)first, compat_ptr(ptr), second, compat_ptr(fifth)); /* else fall through for normal semop() */ case SEMOP: /* struct sembuf is the same on 32 and 64bit :)) */ /* sign extend semid */ return sys_semtimedop((int)first, compat_ptr(ptr), second, NULL); case SEMGET: /* sign extend key, nsems */ return sys_semget((int)first, (int)second, third); case SEMCTL: /* sign extend semid, semnum */ return compat_sys_semctl((int)first, (int)second, third, compat_ptr(ptr)); case MSGSND: /* sign extend msqid */ return compat_sys_msgsnd((int)first, (int)second, third, compat_ptr(ptr)); case MSGRCV: /* sign extend msqid, msgtyp */ return compat_sys_msgrcv((int)first, second, (int)fifth, third, version, compat_ptr(ptr)); case MSGGET: /* sign extend key */ return sys_msgget((int)first, second); case MSGCTL: /* sign extend msqid */ return compat_sys_msgctl((int)first, second, compat_ptr(ptr)); case SHMAT: /* sign extend shmid */ return compat_sys_shmat((int)first, second, third, version, compat_ptr(ptr)); case SHMDT: return sys_shmdt(compat_ptr(ptr)); case SHMGET: /* sign extend key_t */ return sys_shmget((int)first, second, third); case SHMCTL: /* sign extend shmid */ return compat_sys_shmctl((int)first, second, compat_ptr(ptr)); default: return -ENOSYS; }; return -ENOSYS; } #endif asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low) { if ((int)high < 0) return -EINVAL; else return sys_truncate(path, (high << 32) | low); } asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low) { if ((int)high < 0) return -EINVAL; else return sys_ftruncate(fd, (high << 32) | low); } int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf) { compat_ino_t ino; int err; if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev)) return -EOVERFLOW; ino = stat->ino; if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino) return -EOVERFLOW; err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev); err |= put_user(stat->ino, &statbuf->st_ino); err |= put_user(stat->mode, &statbuf->st_mode); err |= put_user(stat->nlink, &statbuf->st_nlink); err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid); err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid); err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev); err |= put_user(stat->size, &statbuf->st_size); err |= put_user(stat->atime.tv_sec, &statbuf->st_atime); err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec); err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime); err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec); err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime); err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec); err |= put_user(stat->blksize, &statbuf->st_blksize); err |= put_user(stat->blocks, &statbuf->st_blocks); err |= put_user(0, &statbuf->__unused4[0]); err |= put_user(0, &statbuf->__unused4[1]); return err; } int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf) { int err; err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev); err |= put_user(stat->ino, &statbuf->st_ino); err |= put_user(stat->mode, &statbuf->st_mode); err |= put_user(stat->nlink, &statbuf->st_nlink); err |= put_user(stat->uid, &statbuf->st_uid); err |= put_user(stat->gid, &statbuf->st_gid); err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev); err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]); err |= put_user(stat->size, &statbuf->st_size); err |= put_user(stat->blksize, &statbuf->st_blksize); err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]); err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]); err |= put_user(stat->blocks, &statbuf->st_blocks); err |= put_user(stat->atime.tv_sec, &statbuf->st_atime); err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec); err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime); err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec); err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime); err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec); err |= put_user(0, &statbuf->__unused4); err |= put_user(0, &statbuf->__unused5); return err; } asmlinkage long compat_sys_stat64(char __user * filename, struct compat_stat64 __user *statbuf) { struct kstat stat; int error = vfs_stat(filename, &stat); if (!error) error = cp_compat_stat64(&stat, statbuf); return error; } asmlinkage long compat_sys_lstat64(char __user * filename, struct compat_stat64 __user *statbuf) { struct kstat stat; int error = vfs_lstat(filename, &stat); if (!error) error = cp_compat_stat64(&stat, statbuf); return error; } asmlinkage long compat_sys_fstat64(unsigned int fd, struct compat_stat64 __user * statbuf) { struct kstat stat; int error = vfs_fstat(fd, &stat); if (!error) error = cp_compat_stat64(&stat, statbuf); return error; } asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename, struct compat_stat64 __user * statbuf, int flag) { struct kstat stat; int error = -EINVAL; if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) goto out; if (flag & AT_SYMLINK_NOFOLLOW) error = vfs_lstat_fd(dfd, filename, &stat); else error = vfs_stat_fd(dfd, filename, &stat); if (!error) error = cp_compat_stat64(&stat, statbuf); out: return error; } asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2) { return sys_sysfs(option, arg1, arg2); } asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval) { struct timespec t; int ret; mm_segment_t old_fs = get_fs (); set_fs (KERNEL_DS); ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t); set_fs (old_fs); if (put_compat_timespec(&t, interval)) return -EFAULT; return ret; } asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, compat_sigset_t __user *oset, compat_size_t sigsetsize) { sigset_t s; compat_sigset_t s32; int ret; mm_segment_t old_fs = get_fs(); if (set) { if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) return -EFAULT; switch (_NSIG_WORDS) { case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); } } set_fs (KERNEL_DS); ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *) &s : NULL, oset ? (sigset_t __user *) &s : NULL, sigsetsize); set_fs (old_fs); if (ret) return ret; if (oset) { switch (_NSIG_WORDS) { case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; } if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) return -EFAULT; } return 0; } asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize) { sigset_t s; compat_sigset_t s32; int ret; mm_segment_t old_fs = get_fs(); set_fs (KERNEL_DS); ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize); set_fs (old_fs); if (!ret) { switch (_NSIG_WORDS) { case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; } if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) return -EFAULT; } return ret; } asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig, struct compat_siginfo __user *uinfo) { siginfo_t info; int ret; mm_segment_t old_fs = get_fs(); if (copy_siginfo_from_user32(&info, uinfo)) return -EFAULT; set_fs (KERNEL_DS); ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info); set_fs (old_fs); return ret; } asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact) { struct k_sigaction new_ka, old_ka; int ret; if (sig < 0) { set_thread_flag(TIF_NEWSIGNALS); sig = -sig; } if (act) { compat_old_sigset_t mask; u32 u_handler, u_restorer; ret = get_user(u_handler, &act->sa_handler); new_ka.sa.sa_handler = compat_ptr(u_handler); ret |= __get_user(u_restorer, &act->sa_restorer); new_ka.sa.sa_restorer = compat_ptr(u_restorer); ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); ret |= __get_user(mask, &act->sa_mask); if (ret) return ret; new_ka.ka_restorer = NULL; siginitset(&new_ka.sa.sa_mask, mask); } ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); if (!ret && oact) { ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler); ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer); ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); } return ret; } asmlinkage long compat_sys_rt_sigaction(int sig, struct sigaction32 __user *act, struct sigaction32 __user *oact, void __user *restorer, compat_size_t sigsetsize) { struct k_sigaction new_ka, old_ka; int ret; compat_sigset_t set32; /* XXX: Don't preclude handling different sized sigset_t's. */ if (sigsetsize != sizeof(compat_sigset_t)) return -EINVAL; /* All tasks which use RT signals (effectively) use * new style signals. */ set_thread_flag(TIF_NEWSIGNALS); if (act) { u32 u_handler, u_restorer; new_ka.ka_restorer = restorer; ret = get_user(u_handler, &act->sa_handler); new_ka.sa.sa_handler = compat_ptr(u_handler); ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)); switch (_NSIG_WORDS) { case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32); case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32); case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32); case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32); } ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); ret |= __get_user(u_restorer, &act->sa_restorer); new_ka.sa.sa_restorer = compat_ptr(u_restorer); if (ret) return -EFAULT; } ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); if (!ret && oact) { switch (_NSIG_WORDS) { case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3]; case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2]; case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1]; case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0]; } ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler); ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)); ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer); if (ret) ret = -EFAULT; } return ret; } /* * sparc32_execve() executes a new program after the asm stub has set * things up for us. This should basically do what I want it to. */ asmlinkage long sparc32_execve(struct pt_regs *regs) { int error, base = 0; char *filename; /* User register window flush is done by entry.S */ /* Check for indirect call. */ if ((u32)regs->u_regs[UREG_G1] == 0) base = 1; filename = getname(compat_ptr(regs->u_regs[base + UREG_I0])); error = PTR_ERR(filename); if (IS_ERR(filename)) goto out; error = compat_do_execve(filename, compat_ptr(regs->u_regs[base + UREG_I1]), compat_ptr(regs->u_regs[base + UREG_I2]), regs); putname(filename); if (!error) { fprs_write(0); current_thread_info()->xfsr[0] = 0; current_thread_info()->fpsaved[0] = 0; regs->tstate &= ~TSTATE_PEF; task_lock(current); current->ptrace &= ~PT_DTRACE; task_unlock(current); } out: return error; } #ifdef CONFIG_MODULES asmlinkage long sys32_init_module(void __user *umod, u32 len, const char __user *uargs) { return sys_init_module(umod, len, uargs); } asmlinkage long sys32_delete_module(const char __user *name_user, unsigned int flags) { return sys_delete_module(name_user, flags); } #else /* CONFIG_MODULES */ asmlinkage long sys32_init_module(const char __user *name_user, struct module __user *mod_user) { return -ENOSYS; } asmlinkage long sys32_delete_module(const char __user *name_user) { return -ENOSYS; } #endif /* CONFIG_MODULES */ /* Translations due to time_t size differences. Which affects all sorts of things, like timeval and itimerval. */ extern struct timezone sys_tz; asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) { if (tv) { struct timeval ktv; do_gettimeofday(&ktv); if (put_tv32(tv, &ktv)) return -EFAULT; } if (tz) { if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) return -EFAULT; } return 0; } static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i) { long usec; if (!access_ok(VERIFY_READ, i, sizeof(*i))) return -EFAULT; if (__get_user(o->tv_sec, &i->tv_sec)) return -EFAULT; if (__get_user(usec, &i->tv_usec)) return -EFAULT; o->tv_nsec = usec * 1000; return 0; } asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) { struct timespec kts; struct timezone ktz; if (tv) { if (get_ts32(&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); } asmlinkage long sys32_utimes(char __user *filename, struct compat_timeval __user *tvs) { struct timespec tv[2]; if (tvs) { struct timeval ktvs[2]; if (get_tv32(&ktvs[0], tvs) || get_tv32(&ktvs[1], 1+tvs)) return -EFAULT; if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) return -EINVAL; tv[0].tv_sec = ktvs[0].tv_sec; tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; tv[1].tv_sec = ktvs[1].tv_sec; tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; } return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); } /* These are here just in case some old sparc32 binary calls it. */ asmlinkage long sys32_pause(void) { current->state = TASK_INTERRUPTIBLE; schedule(); return -ERESTARTNOHAND; } asmlinkage compat_ssize_t sys32_pread64(unsigned int fd, char __user *ubuf, compat_size_t count, unsigned long poshi, unsigned long poslo) { return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo); } asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count, unsigned long poshi, unsigned long poslo) { return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo); } asmlinkage long compat_sys_readahead(int fd, unsigned long offhi, unsigned long offlo, compat_size_t count) { return sys_readahead(fd, (offhi << 32) | offlo, count); } long compat_sys_fadvise64(int fd, unsigned long offhi, unsigned long offlo, compat_size_t len, int advice) { return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice); } long compat_sys_fadvise64_64(int fd, unsigned long offhi, unsigned long offlo, unsigned long lenhi, unsigned long lenlo, int advice) { return sys_fadvise64_64(fd, (offhi << 32) | offlo, (lenhi << 32) | lenlo, advice); } asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, compat_size_t count) { mm_segment_t old_fs = get_fs(); int ret; off_t of; if (offset && get_user(of, offset)) return -EFAULT; set_fs(KERNEL_DS); ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *) &of : NULL, count); set_fs(old_fs); if (offset && put_user(of, offset)) return -EFAULT; return ret; } asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, compat_size_t count) { mm_segment_t old_fs = get_fs(); int ret; loff_t lof; if (offset && get_user(lof, offset)) return -EFAULT; set_fs(KERNEL_DS); ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *) &lof : NULL, count); set_fs(old_fs); if (offset && put_user(lof, offset)) return -EFAULT; return ret; } /* This is just a version for 32-bit applications which does * not force O_LARGEFILE on. */ asmlinkage long sparc32_open(const char __user *filename, int flags, int mode) { return do_sys_open(AT_FDCWD, filename, flags, mode); } extern unsigned long do_mremap(unsigned long addr, unsigned long old_len, unsigned long new_len, unsigned long flags, unsigned long new_addr); asmlinkage unsigned long sys32_mremap(unsigned long addr, unsigned long old_len, unsigned long new_len, unsigned long flags, u32 __new_addr) { struct vm_area_struct *vma; unsigned long ret = -EINVAL; unsigned long new_addr = __new_addr; if (old_len > STACK_TOP32 || new_len > STACK_TOP32) goto out; if (addr > STACK_TOP32 - old_len) goto out; down_write(¤t->mm->mmap_sem); if (flags & MREMAP_FIXED) { if (new_addr > STACK_TOP32 - new_len) goto out_sem; } else if (addr > STACK_TOP32 - new_len) { unsigned long map_flags = 0; struct file *file = NULL; ret = -ENOMEM; if (!(flags & MREMAP_MAYMOVE)) goto out_sem; vma = find_vma(current->mm, addr); if (vma) { if (vma->vm_flags & VM_SHARED) map_flags |= MAP_SHARED; file = vma->vm_file; } /* MREMAP_FIXED checked above. */ new_addr = get_unmapped_area(file, addr, new_len, vma ? vma->vm_pgoff : 0, map_flags); ret = new_addr; if (new_addr & ~PAGE_MASK) goto out_sem; flags |= MREMAP_FIXED; } ret = do_mremap(addr, old_len, new_len, flags, new_addr); out_sem: up_write(¤t->mm->mmap_sem); out: return ret; } struct __sysctl_args32 { u32 name; int nlen; u32 oldval; u32 oldlenp; u32 newval; u32 newlen; u32 __unused[4]; }; asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args) { #ifndef CONFIG_SYSCTL_SYSCALL return -ENOSYS; #else struct __sysctl_args32 tmp; int error; size_t oldlen, __user *oldlenp = NULL; unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL; if (copy_from_user(&tmp, args, sizeof(tmp))) return -EFAULT; if (tmp.oldval && tmp.oldlenp) { /* Duh, this is ugly and might not work if sysctl_args is in read-only memory, but do_sysctl does indirectly a lot of uaccess in both directions and we'd have to basically copy the whole sysctl.c here, and glibc's __sysctl uses rw memory for the structure anyway. */ if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) || put_user(oldlen, (size_t __user *)addr)) return -EFAULT; oldlenp = (size_t __user *)addr; } lock_kernel(); error = do_sysctl((int __user *)(unsigned long) tmp.name, tmp.nlen, (void __user *)(unsigned long) tmp.oldval, oldlenp, (void __user *)(unsigned long) tmp.newval, tmp.newlen); unlock_kernel(); if (oldlenp) { if (!error) { if (get_user(oldlen, (size_t __user *)addr) || put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp)) error = -EFAULT; } if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused))) error = -EFAULT; } return error; #endif } long sys32_lookup_dcookie(unsigned long cookie_high, unsigned long cookie_low, char __user *buf, size_t len) { return sys_lookup_dcookie((cookie_high << 32) | cookie_low, buf, len); } long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags) { return sys_sync_file_range(fd, (off_high << 32) | off_low, (nb_high << 32) | nb_low, flags); } asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, u32 lenhi, u32 lenlo) { return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, ((loff_t)lenhi << 32) | lenlo); }