2 * arch/s390x/kernel/linux32.c
5 * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
7 * Gerhard Tonn (ton@de.ibm.com)
8 * Thomas Spatzier (tspat@de.ibm.com)
10 * Conversion between 31bit and 64bit native syscalls.
12 * Heavily inspired by the 32-bit Sparc compat code which is
13 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
14 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
23 #include <linux/file.h>
24 #include <linux/signal.h>
25 #include <linux/resource.h>
26 #include <linux/times.h>
27 #include <linux/utsname.h>
28 #include <linux/smp.h>
29 #include <linux/smp_lock.h>
30 #include <linux/sem.h>
31 #include <linux/msg.h>
32 #include <linux/shm.h>
33 #include <linux/slab.h>
34 #include <linux/uio.h>
35 #include <linux/nfs_fs.h>
36 #include <linux/quota.h>
37 #include <linux/module.h>
38 #include <linux/sunrpc/svc.h>
39 #include <linux/nfsd/nfsd.h>
40 #include <linux/nfsd/cache.h>
41 #include <linux/nfsd/xdr.h>
42 #include <linux/nfsd/syscall.h>
43 #include <linux/poll.h>
44 #include <linux/personality.h>
45 #include <linux/stat.h>
46 #include <linux/filter.h>
47 #include <linux/highmem.h>
48 #include <linux/highuid.h>
49 #include <linux/mman.h>
50 #include <linux/ipv6.h>
52 #include <linux/icmpv6.h>
53 #include <linux/syscalls.h>
54 #include <linux/sysctl.h>
55 #include <linux/binfmts.h>
56 #include <linux/capability.h>
57 #include <linux/compat.h>
58 #include <linux/vfs.h>
59 #include <linux/ptrace.h>
60 #include <linux/fadvise.h>
62 #include <asm/types.h>
64 #include <asm/uaccess.h>
65 #include <asm/semaphore.h>
70 #include "compat_linux.h"
72 long psw_user32_bits = (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME |
73 PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
74 PSW_MASK_PSTATE | PSW_DEFAULT_KEY);
75 long psw32_user_bits = (PSW32_BASE_BITS | PSW32_MASK_DAT | PSW32_ASC_HOME |
76 PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK |
79 /* For this source file, we want overflow handling. */
89 #undef SET_OLDSTAT_UID
90 #undef SET_OLDSTAT_GID
94 #define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
95 #define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
96 #define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
97 #define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
98 #define SET_UID16(var, uid) var = high2lowuid(uid)
99 #define SET_GID16(var, gid) var = high2lowgid(gid)
100 #define NEW_TO_OLD_UID(uid) high2lowuid(uid)
101 #define NEW_TO_OLD_GID(gid) high2lowgid(gid)
102 #define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
103 #define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
104 #define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
105 #define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
107 asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
109 return sys_chown(filename, low2highuid(user), low2highgid(group));
112 asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
114 return sys_lchown(filename, low2highuid(user), low2highgid(group));
117 asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
119 return sys_fchown(fd, low2highuid(user), low2highgid(group));
122 asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
124 return sys_setregid(low2highgid(rgid), low2highgid(egid));
127 asmlinkage long sys32_setgid16(u16 gid)
129 return sys_setgid((gid_t)gid);
132 asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
134 return sys_setreuid(low2highuid(ruid), low2highuid(euid));
137 asmlinkage long sys32_setuid16(u16 uid)
139 return sys_setuid((uid_t)uid);
142 asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
144 return sys_setresuid(low2highuid(ruid), low2highuid(euid),
148 asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
152 if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
153 !(retval = put_user(high2lowuid(current->euid), euid)))
154 retval = put_user(high2lowuid(current->suid), suid);
159 asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
161 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
165 asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
169 if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
170 !(retval = put_user(high2lowgid(current->egid), egid)))
171 retval = put_user(high2lowgid(current->sgid), sgid);
176 asmlinkage long sys32_setfsuid16(u16 uid)
178 return sys_setfsuid((uid_t)uid);
181 asmlinkage long sys32_setfsgid16(u16 gid)
183 return sys_setfsgid((gid_t)gid);
186 static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
191 for (i = 0; i < group_info->ngroups; i++) {
192 group = (u16)GROUP_AT(group_info, i);
193 if (put_user(group, grouplist+i))
200 static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
205 for (i = 0; i < group_info->ngroups; i++) {
206 if (get_user(group, grouplist+i))
208 GROUP_AT(group_info, i) = (gid_t)group;
214 asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
221 get_group_info(current->group_info);
222 i = current->group_info->ngroups;
224 if (i > gidsetsize) {
228 if (groups16_to_user(grouplist, current->group_info)) {
234 put_group_info(current->group_info);
238 asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
240 struct group_info *group_info;
243 if (!capable(CAP_SETGID))
245 if ((unsigned)gidsetsize > NGROUPS_MAX)
248 group_info = groups_alloc(gidsetsize);
251 retval = groups16_from_user(group_info, grouplist);
253 put_group_info(group_info);
257 retval = set_current_groups(group_info);
258 put_group_info(group_info);
263 asmlinkage long sys32_getuid16(void)
265 return high2lowuid(current->uid);
268 asmlinkage long sys32_geteuid16(void)
270 return high2lowuid(current->euid);
273 asmlinkage long sys32_getgid16(void)
275 return high2lowgid(current->gid);
278 asmlinkage long sys32_getegid16(void)
280 return high2lowgid(current->egid);
283 /* 32-bit timeval and related flotsam. */
285 static inline long get_tv32(struct timeval *o, struct compat_timeval __user *i)
287 return (!access_ok(VERIFY_READ, o, sizeof(*o)) ||
288 (__get_user(o->tv_sec, &i->tv_sec) ||
289 __get_user(o->tv_usec, &i->tv_usec)));
292 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
294 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
295 (__put_user(i->tv_sec, &o->tv_sec) ||
296 __put_user(i->tv_usec, &o->tv_usec)));
300 * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation.
302 * This is really horribly ugly.
304 #ifdef CONFIG_SYSVIPC
305 asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr)
307 if (call >> 16) /* hack for backward compatibility */
314 return compat_sys_semtimedop(first, compat_ptr(ptr),
315 second, compat_ptr(third));
317 /* struct sembuf is the same on 32 and 64bit :)) */
318 return sys_semtimedop(first, compat_ptr(ptr),
321 return sys_semget(first, second, third);
323 return compat_sys_semctl(first, second, third,
326 return compat_sys_msgsnd(first, second, third,
329 return compat_sys_msgrcv(first, second, 0, third,
332 return sys_msgget((key_t) first, second);
334 return compat_sys_msgctl(first, second, compat_ptr(ptr));
336 return compat_sys_shmat(first, second, third,
339 return sys_shmdt(compat_ptr(ptr));
341 return sys_shmget(first, (unsigned)second, third);
343 return compat_sys_shmctl(first, second, compat_ptr(ptr));
350 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
355 return sys_truncate(path, (high << 32) | low);
358 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
363 return sys_ftruncate(fd, (high << 32) | low);
366 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
371 if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
375 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
378 err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
379 err |= put_user(stat->ino, &statbuf->st_ino);
380 err |= put_user(stat->mode, &statbuf->st_mode);
381 err |= put_user(stat->nlink, &statbuf->st_nlink);
382 err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
383 err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
384 err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
385 err |= put_user(stat->size, &statbuf->st_size);
386 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
387 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
388 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
389 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
390 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
391 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
392 err |= put_user(stat->blksize, &statbuf->st_blksize);
393 err |= put_user(stat->blocks, &statbuf->st_blocks);
395 err |= put_user(0, &statbuf->__unused4[0]);
396 err |= put_user(0, &statbuf->__unused4[1]);
410 unsigned short procs;
414 unsigned int mem_unit;
418 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
422 mm_segment_t old_fs = get_fs ();
425 ret = sys_sysinfo((struct sysinfo __force __user *) &s);
427 err = put_user (s.uptime, &info->uptime);
428 err |= __put_user (s.loads[0], &info->loads[0]);
429 err |= __put_user (s.loads[1], &info->loads[1]);
430 err |= __put_user (s.loads[2], &info->loads[2]);
431 err |= __put_user (s.totalram, &info->totalram);
432 err |= __put_user (s.freeram, &info->freeram);
433 err |= __put_user (s.sharedram, &info->sharedram);
434 err |= __put_user (s.bufferram, &info->bufferram);
435 err |= __put_user (s.totalswap, &info->totalswap);
436 err |= __put_user (s.freeswap, &info->freeswap);
437 err |= __put_user (s.procs, &info->procs);
438 err |= __put_user (s.totalhigh, &info->totalhigh);
439 err |= __put_user (s.freehigh, &info->freehigh);
440 err |= __put_user (s.mem_unit, &info->mem_unit);
446 asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
447 struct compat_timespec __user *interval)
451 mm_segment_t old_fs = get_fs ();
454 ret = sys_sched_rr_get_interval(pid,
455 (struct timespec __force __user *) &t);
457 if (put_compat_timespec(&t, interval))
462 asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
463 compat_sigset_t __user *oset, size_t sigsetsize)
468 mm_segment_t old_fs = get_fs();
471 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
473 switch (_NSIG_WORDS) {
474 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
475 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
476 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
477 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
481 ret = sys_rt_sigprocmask(how,
482 set ? (sigset_t __force __user *) &s : NULL,
483 oset ? (sigset_t __force __user *) &s : NULL,
488 switch (_NSIG_WORDS) {
489 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
490 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
491 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
492 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
494 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
500 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
506 mm_segment_t old_fs = get_fs();
509 ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize);
512 switch (_NSIG_WORDS) {
513 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
514 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
515 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
516 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
518 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
525 sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
529 mm_segment_t old_fs = get_fs();
531 if (copy_siginfo_from_user32(&info, uinfo))
534 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info);
540 * sys32_execve() executes a new program after the asm stub has set
541 * things up for us. This should basically do what I want it to.
544 sys32_execve(struct pt_regs regs)
549 filename = getname(compat_ptr(regs.orig_gpr2));
550 error = PTR_ERR(filename);
551 if (IS_ERR(filename))
553 error = compat_do_execve(filename, compat_ptr(regs.gprs[3]),
554 compat_ptr(regs.gprs[4]), ®s);
558 current->ptrace &= ~PT_DTRACE;
559 task_unlock(current);
560 current->thread.fp_regs.fpc=0;
561 asm volatile("sfpc %0,0" : : "d" (0));
569 #ifdef CONFIG_MODULES
572 sys32_init_module(void __user *umod, unsigned long len,
573 const char __user *uargs)
575 return sys_init_module(umod, len, uargs);
579 sys32_delete_module(const char __user *name_user, unsigned int flags)
581 return sys_delete_module(name_user, flags);
584 #else /* CONFIG_MODULES */
587 sys32_init_module(void __user *umod, unsigned long len,
588 const char __user *uargs)
594 sys32_delete_module(const char __user *name_user, unsigned int flags)
599 #endif /* CONFIG_MODULES */
601 /* Translations due to time_t size differences. Which affects all
602 sorts of things, like timeval and itimerval. */
604 extern struct timezone sys_tz;
606 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
610 do_gettimeofday(&ktv);
611 if (put_tv32(tv, &ktv))
615 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
621 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
625 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
627 if (__get_user(o->tv_sec, &i->tv_sec))
629 if (__get_user(usec, &i->tv_usec))
631 o->tv_nsec = usec * 1000;
635 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
641 if (get_ts32(&kts, tv))
645 if (copy_from_user(&ktz, tz, sizeof(ktz)))
649 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
652 /* These are here just in case some old sparc32 binary calls it. */
653 asmlinkage long sys32_pause(void)
655 current->state = TASK_INTERRUPTIBLE;
657 return -ERESTARTNOHAND;
660 asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
661 size_t count, u32 poshi, u32 poslo)
663 if ((compat_ssize_t) count < 0)
665 return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
668 asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
669 size_t count, u32 poshi, u32 poslo)
671 if ((compat_ssize_t) count < 0)
673 return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
676 asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
678 return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
681 asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count)
683 mm_segment_t old_fs = get_fs();
687 if (offset && get_user(of, offset))
691 ret = sys_sendfile(out_fd, in_fd,
692 offset ? (off_t __force __user *) &of : NULL, count);
695 if (offset && put_user(of, offset))
701 asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
702 compat_loff_t __user *offset, s32 count)
704 mm_segment_t old_fs = get_fs();
708 if (offset && get_user(lof, offset))
712 ret = sys_sendfile64(out_fd, in_fd,
713 offset ? (loff_t __force __user *) &lof : NULL,
717 if (offset && put_user(lof, offset))
723 #ifdef CONFIG_SYSCTL_SYSCALL
724 struct __sysctl_args32 {
734 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
736 struct __sysctl_args32 tmp;
739 size_t __user *oldlenp = NULL;
740 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
742 if (copy_from_user(&tmp, args, sizeof(tmp)))
745 if (tmp.oldval && tmp.oldlenp) {
746 /* Duh, this is ugly and might not work if sysctl_args
747 is in read-only memory, but do_sysctl does indirectly
748 a lot of uaccess in both directions and we'd have to
749 basically copy the whole sysctl.c here, and
750 glibc's __sysctl uses rw memory for the structure
752 if (get_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)) ||
753 put_user(oldlen, (size_t __user *)addr))
755 oldlenp = (size_t __user *)addr;
759 error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval),
760 oldlenp, compat_ptr(tmp.newval), tmp.newlen);
764 if (get_user(oldlen, (size_t __user *)addr) ||
765 put_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)))
768 if (copy_to_user(args->__unused, tmp.__unused,
769 sizeof(tmp.__unused)))
776 struct stat64_emu31 {
777 unsigned long long st_dev;
779 #define STAT64_HAS_BROKEN_ST_INO 1
781 unsigned int st_mode;
782 unsigned int st_nlink;
785 unsigned long long st_rdev;
789 unsigned char __pad4[4];
790 u32 __pad5; /* future possible st_blocks high bits */
791 u32 st_blocks; /* Number 512-byte blocks allocated. */
797 u32 __pad8; /* will be high 32 bits of ctime someday */
798 unsigned long st_ino;
801 static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
803 struct stat64_emu31 tmp;
805 memset(&tmp, 0, sizeof(tmp));
807 tmp.st_dev = huge_encode_dev(stat->dev);
808 tmp.st_ino = stat->ino;
809 tmp.__st_ino = (u32)stat->ino;
810 tmp.st_mode = stat->mode;
811 tmp.st_nlink = (unsigned int)stat->nlink;
812 tmp.st_uid = stat->uid;
813 tmp.st_gid = stat->gid;
814 tmp.st_rdev = huge_encode_dev(stat->rdev);
815 tmp.st_size = stat->size;
816 tmp.st_blksize = (u32)stat->blksize;
817 tmp.st_blocks = (u32)stat->blocks;
818 tmp.st_atime = (u32)stat->atime.tv_sec;
819 tmp.st_mtime = (u32)stat->mtime.tv_sec;
820 tmp.st_ctime = (u32)stat->ctime.tv_sec;
822 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
825 asmlinkage long sys32_stat64(char __user * filename, struct stat64_emu31 __user * statbuf)
828 int ret = vfs_stat(filename, &stat);
830 ret = cp_stat64(statbuf, &stat);
834 asmlinkage long sys32_lstat64(char __user * filename, struct stat64_emu31 __user * statbuf)
837 int ret = vfs_lstat(filename, &stat);
839 ret = cp_stat64(statbuf, &stat);
843 asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf)
846 int ret = vfs_fstat(fd, &stat);
848 ret = cp_stat64(statbuf, &stat);
852 asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename,
853 struct stat64_emu31 __user* statbuf, int flag)
858 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
861 if (flag & AT_SYMLINK_NOFOLLOW)
862 error = vfs_lstat_fd(dfd, filename, &stat);
864 error = vfs_stat_fd(dfd, filename, &stat);
867 error = cp_stat64(statbuf, &stat);
873 * Linux/i386 didn't use to be able to handle more than
874 * 4 system call parameters, so these system calls used a memory
875 * block for parameter passing..
878 struct mmap_arg_struct_emu31 {
887 /* common code for old and new mmaps */
888 static inline long do_mmap2(
889 unsigned long addr, unsigned long len,
890 unsigned long prot, unsigned long flags,
891 unsigned long fd, unsigned long pgoff)
893 struct file * file = NULL;
894 unsigned long error = -EBADF;
896 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
897 if (!(flags & MAP_ANONYMOUS)) {
903 down_write(¤t->mm->mmap_sem);
904 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
905 if (!IS_ERR((void *) error) && error + len >= 0x80000000ULL) {
906 /* Result is out of bounds. */
907 do_munmap(current->mm, addr, len);
910 up_write(¤t->mm->mmap_sem);
919 asmlinkage unsigned long
920 old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
922 struct mmap_arg_struct_emu31 a;
925 if (copy_from_user(&a, arg, sizeof(a)))
929 if (a.offset & ~PAGE_MASK)
932 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
938 sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
940 struct mmap_arg_struct_emu31 a;
943 if (copy_from_user(&a, arg, sizeof(a)))
945 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
950 asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)
952 if ((compat_ssize_t) count < 0)
955 return sys_read(fd, buf, count);
958 asmlinkage long sys32_write(unsigned int fd, char __user * buf, size_t count)
960 if ((compat_ssize_t) count < 0)
963 return sys_write(fd, buf, count);
966 asmlinkage long sys32_clone(struct pt_regs regs)
968 unsigned long clone_flags;
970 int __user *parent_tidptr, *child_tidptr;
972 clone_flags = regs.gprs[3] & 0xffffffffUL;
973 newsp = regs.orig_gpr2 & 0x7fffffffUL;
974 parent_tidptr = compat_ptr(regs.gprs[4]);
975 child_tidptr = compat_ptr(regs.gprs[5]);
977 newsp = regs.gprs[15];
978 return do_fork(clone_flags, newsp, ®s, 0,
979 parent_tidptr, child_tidptr);
983 * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
984 * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
985 * because the 31 bit values differ from the 64 bit values.
989 sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
992 advise = POSIX_FADV_DONTNEED;
993 else if (advise == 5)
994 advise = POSIX_FADV_NOREUSE;
995 return sys_fadvise64(fd, offset, len, advise);
998 struct fadvise64_64_args {
1006 sys32_fadvise64_64(struct fadvise64_64_args __user *args)
1008 struct fadvise64_64_args a;
1010 if ( copy_from_user(&a, args, sizeof(a)) )
1013 a.advice = POSIX_FADV_DONTNEED;
1014 else if (a.advice == 5)
1015 a.advice = POSIX_FADV_NOREUSE;
1016 return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);