1046 lines
26 KiB
C
1046 lines
26 KiB
C
![]() |
/*
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* arch/s390x/kernel/linux32.c
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*
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* S390 version
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* Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
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* Gerhard Tonn (ton@de.ibm.com)
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* Thomas Spatzier (tspat@de.ibm.com)
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*
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* Conversion between 31bit and 64bit native syscalls.
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*
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* Heavily inspired by the 32-bit Sparc compat code which is
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* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
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*
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/file.h>
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#include <linux/signal.h>
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#include <linux/resource.h>
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#include <linux/times.h>
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#include <linux/utsname.h>
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#include <linux/timex.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/slab.h>
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#include <linux/uio.h>
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#include <linux/nfs_fs.h>
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#include <linux/quota.h>
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#include <linux/module.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/nfsd/nfsd.h>
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#include <linux/nfsd/cache.h>
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#include <linux/nfsd/xdr.h>
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#include <linux/nfsd/syscall.h>
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#include <linux/poll.h>
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#include <linux/personality.h>
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#include <linux/stat.h>
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#include <linux/filter.h>
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#include <linux/highmem.h>
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#include <linux/highuid.h>
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#include <linux/mman.h>
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#include <linux/ipv6.h>
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#include <linux/in.h>
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#include <linux/icmpv6.h>
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#include <linux/syscalls.h>
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#include <linux/sysctl.h>
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#include <linux/binfmts.h>
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#include <linux/compat.h>
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#include <linux/vfs.h>
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#include <linux/ptrace.h>
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#include <asm/types.h>
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#include <asm/ipc.h>
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#include <asm/uaccess.h>
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#include <asm/semaphore.h>
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#include <net/scm.h>
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#include <net/sock.h>
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#include "compat_linux.h"
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/* For this source file, we want overflow handling. */
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#undef high2lowuid
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#undef high2lowgid
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#undef low2highuid
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#undef low2highgid
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#undef SET_UID16
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#undef SET_GID16
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#undef NEW_TO_OLD_UID
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#undef NEW_TO_OLD_GID
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#undef SET_OLDSTAT_UID
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#undef SET_OLDSTAT_GID
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#undef SET_STAT_UID
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#undef SET_STAT_GID
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#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
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#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
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#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
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#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
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#define SET_UID16(var, uid) var = high2lowuid(uid)
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#define SET_GID16(var, gid) var = high2lowgid(gid)
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#define NEW_TO_OLD_UID(uid) high2lowuid(uid)
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#define NEW_TO_OLD_GID(gid) high2lowgid(gid)
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#define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
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#define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
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#define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
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#define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
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asmlinkage long sys32_chown16(const char * filename, u16 user, u16 group)
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{
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return sys_chown(filename, low2highuid(user), low2highgid(group));
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}
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asmlinkage long sys32_lchown16(const char * filename, u16 user, u16 group)
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{
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return sys_lchown(filename, low2highuid(user), low2highgid(group));
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}
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asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
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{
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return sys_fchown(fd, low2highuid(user), low2highgid(group));
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}
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asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
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{
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return sys_setregid(low2highgid(rgid), low2highgid(egid));
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}
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asmlinkage long sys32_setgid16(u16 gid)
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{
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return sys_setgid((gid_t)gid);
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}
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asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
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{
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return sys_setreuid(low2highuid(ruid), low2highuid(euid));
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}
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asmlinkage long sys32_setuid16(u16 uid)
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{
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return sys_setuid((uid_t)uid);
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}
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asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
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{
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return sys_setresuid(low2highuid(ruid), low2highuid(euid),
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low2highuid(suid));
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}
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asmlinkage long sys32_getresuid16(u16 *ruid, u16 *euid, u16 *suid)
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{
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int retval;
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if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
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!(retval = put_user(high2lowuid(current->euid), euid)))
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retval = put_user(high2lowuid(current->suid), suid);
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return retval;
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}
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asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
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{
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return sys_setresgid(low2highgid(rgid), low2highgid(egid),
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low2highgid(sgid));
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}
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asmlinkage long sys32_getresgid16(u16 *rgid, u16 *egid, u16 *sgid)
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{
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int retval;
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if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
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!(retval = put_user(high2lowgid(current->egid), egid)))
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retval = put_user(high2lowgid(current->sgid), sgid);
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return retval;
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}
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asmlinkage long sys32_setfsuid16(u16 uid)
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{
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return sys_setfsuid((uid_t)uid);
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}
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asmlinkage long sys32_setfsgid16(u16 gid)
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{
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return sys_setfsgid((gid_t)gid);
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}
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static int groups16_to_user(u16 *grouplist, struct group_info *group_info)
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{
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int i;
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u16 group;
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for (i = 0; i < group_info->ngroups; i++) {
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group = (u16)GROUP_AT(group_info, i);
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if (put_user(group, grouplist+i))
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return -EFAULT;
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}
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return 0;
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}
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static int groups16_from_user(struct group_info *group_info, u16 *grouplist)
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{
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int i;
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u16 group;
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for (i = 0; i < group_info->ngroups; i++) {
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if (get_user(group, grouplist+i))
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return -EFAULT;
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GROUP_AT(group_info, i) = (gid_t)group;
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}
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return 0;
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}
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asmlinkage long sys32_getgroups16(int gidsetsize, u16 *grouplist)
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{
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int i;
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if (gidsetsize < 0)
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return -EINVAL;
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get_group_info(current->group_info);
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i = current->group_info->ngroups;
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if (gidsetsize) {
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if (i > gidsetsize) {
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i = -EINVAL;
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goto out;
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}
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if (groups16_to_user(grouplist, current->group_info)) {
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i = -EFAULT;
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goto out;
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}
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}
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out:
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put_group_info(current->group_info);
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return i;
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}
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asmlinkage long sys32_setgroups16(int gidsetsize, u16 *grouplist)
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{
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struct group_info *group_info;
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int retval;
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if (!capable(CAP_SETGID))
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return -EPERM;
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if ((unsigned)gidsetsize > NGROUPS_MAX)
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return -EINVAL;
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group_info = groups_alloc(gidsetsize);
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if (!group_info)
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return -ENOMEM;
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retval = groups16_from_user(group_info, grouplist);
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if (retval) {
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put_group_info(group_info);
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return retval;
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}
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retval = set_current_groups(group_info);
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put_group_info(group_info);
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return retval;
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}
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asmlinkage long sys32_getuid16(void)
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{
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return high2lowuid(current->uid);
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}
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asmlinkage long sys32_geteuid16(void)
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{
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return high2lowuid(current->euid);
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}
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asmlinkage long sys32_getgid16(void)
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{
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return high2lowgid(current->gid);
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}
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asmlinkage long sys32_getegid16(void)
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{
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return high2lowgid(current->egid);
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}
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/* 32-bit timeval and related flotsam. */
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static inline long get_tv32(struct timeval *o, struct compat_timeval *i)
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{
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return (!access_ok(VERIFY_READ, tv32, sizeof(*tv32)) ||
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(__get_user(o->tv_sec, &i->tv_sec) ||
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__get_user(o->tv_usec, &i->tv_usec)));
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}
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static inline long put_tv32(struct compat_timeval *o, struct timeval *i)
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{
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return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
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(__put_user(i->tv_sec, &o->tv_sec) ||
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__put_user(i->tv_usec, &o->tv_usec)));
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}
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/*
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* sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation.
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*
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* This is really horribly ugly.
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*/
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asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr)
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{
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if (call >> 16) /* hack for backward compatibility */
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return -EINVAL;
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call &= 0xffff;
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switch (call) {
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case SEMTIMEDOP:
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return compat_sys_semtimedop(first, compat_ptr(ptr),
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second, compat_ptr(third));
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case SEMOP:
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/* struct sembuf is the same on 32 and 64bit :)) */
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return sys_semtimedop(first, compat_ptr(ptr),
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second, NULL);
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case SEMGET:
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return sys_semget(first, second, third);
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case SEMCTL:
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return compat_sys_semctl(first, second, third,
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compat_ptr(ptr));
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case MSGSND:
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return compat_sys_msgsnd(first, second, third,
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compat_ptr(ptr));
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case MSGRCV:
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return compat_sys_msgrcv(first, second, 0, third,
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0, compat_ptr(ptr));
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case MSGGET:
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return sys_msgget((key_t) first, second);
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case MSGCTL:
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return compat_sys_msgctl(first, second, compat_ptr(ptr));
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case SHMAT:
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return compat_sys_shmat(first, second, third,
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0, compat_ptr(ptr));
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case SHMDT:
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return sys_shmdt(compat_ptr(ptr));
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case SHMGET:
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return sys_shmget(first, (unsigned)second, third);
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case SHMCTL:
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return compat_sys_shmctl(first, second, compat_ptr(ptr));
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}
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|
|
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return -ENOSYS;
|
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|
}
|
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|
|
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asmlinkage long sys32_truncate64(const char * path, unsigned long high, unsigned long low)
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{
|
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if ((int)high < 0)
|
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return -EINVAL;
|
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else
|
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return sys_truncate(path, (high << 32) | low);
|
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|
}
|
||
|
|
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|
asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
|
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|
{
|
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|
if ((int)high < 0)
|
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return -EINVAL;
|
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|
else
|
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return sys_ftruncate(fd, (high << 32) | low);
|
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|
}
|
||
|
|
||
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int cp_compat_stat(struct kstat *stat, struct compat_stat *statbuf)
|
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|
{
|
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int err;
|
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|
|
||
|
if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
|
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|
return -EOVERFLOW;
|
||
|
|
||
|
err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
|
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err |= put_user(stat->ino, &statbuf->st_ino);
|
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|
err |= put_user(stat->mode, &statbuf->st_mode);
|
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|
err |= put_user(stat->nlink, &statbuf->st_nlink);
|
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err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
|
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|
err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
|
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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);
|
||
|
/* fixme
|
||
|
err |= put_user(0, &statbuf->__unused4[0]);
|
||
|
err |= put_user(0, &statbuf->__unused4[1]);
|
||
|
*/
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
struct sysinfo32 {
|
||
|
s32 uptime;
|
||
|
u32 loads[3];
|
||
|
u32 totalram;
|
||
|
u32 freeram;
|
||
|
u32 sharedram;
|
||
|
u32 bufferram;
|
||
|
u32 totalswap;
|
||
|
u32 freeswap;
|
||
|
unsigned short procs;
|
||
|
unsigned short pads;
|
||
|
u32 totalhigh;
|
||
|
u32 freehigh;
|
||
|
unsigned int mem_unit;
|
||
|
char _f[8];
|
||
|
};
|
||
|
|
||
|
asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
|
||
|
{
|
||
|
struct sysinfo s;
|
||
|
int ret, err;
|
||
|
mm_segment_t old_fs = get_fs ();
|
||
|
|
||
|
set_fs (KERNEL_DS);
|
||
|
ret = sys_sysinfo(&s);
|
||
|
set_fs (old_fs);
|
||
|
err = put_user (s.uptime, &info->uptime);
|
||
|
err |= __put_user (s.loads[0], &info->loads[0]);
|
||
|
err |= __put_user (s.loads[1], &info->loads[1]);
|
||
|
err |= __put_user (s.loads[2], &info->loads[2]);
|
||
|
err |= __put_user (s.totalram, &info->totalram);
|
||
|
err |= __put_user (s.freeram, &info->freeram);
|
||
|
err |= __put_user (s.sharedram, &info->sharedram);
|
||
|
err |= __put_user (s.bufferram, &info->bufferram);
|
||
|
err |= __put_user (s.totalswap, &info->totalswap);
|
||
|
err |= __put_user (s.freeswap, &info->freeswap);
|
||
|
err |= __put_user (s.procs, &info->procs);
|
||
|
err |= __put_user (s.totalhigh, &info->totalhigh);
|
||
|
err |= __put_user (s.freehigh, &info->freehigh);
|
||
|
err |= __put_user (s.mem_unit, &info->mem_unit);
|
||
|
if (err)
|
||
|
return -EFAULT;
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_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, &t);
|
||
|
set_fs (old_fs);
|
||
|
if (put_compat_timespec(&t, interval))
|
||
|
return -EFAULT;
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
|
||
|
compat_sigset_t __user *oset, 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 ? &s : NULL, oset ? &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,
|
||
|
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(&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
|
||
|
sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __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, &info);
|
||
|
set_fs (old_fs);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* sys32_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
|
||
|
sys32_execve(struct pt_regs regs)
|
||
|
{
|
||
|
int error;
|
||
|
char * filename;
|
||
|
|
||
|
filename = getname(compat_ptr(regs.orig_gpr2));
|
||
|
error = PTR_ERR(filename);
|
||
|
if (IS_ERR(filename))
|
||
|
goto out;
|
||
|
error = compat_do_execve(filename, compat_ptr(regs.gprs[3]),
|
||
|
compat_ptr(regs.gprs[4]), ®s);
|
||
|
if (error == 0)
|
||
|
{
|
||
|
task_lock(current);
|
||
|
current->ptrace &= ~PT_DTRACE;
|
||
|
task_unlock(current);
|
||
|
current->thread.fp_regs.fpc=0;
|
||
|
__asm__ __volatile__
|
||
|
("sr 0,0\n\t"
|
||
|
"sfpc 0,0\n\t"
|
||
|
: : :"0");
|
||
|
}
|
||
|
putname(filename);
|
||
|
out:
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
|
||
|
#ifdef CONFIG_MODULES
|
||
|
|
||
|
asmlinkage long
|
||
|
sys32_init_module(void __user *umod, unsigned long 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(void __user *umod, unsigned long len,
|
||
|
const char __user *uargs)
|
||
|
{
|
||
|
return -ENOSYS;
|
||
|
}
|
||
|
|
||
|
asmlinkage long
|
||
|
sys32_delete_module(const char __user *name_user, unsigned int flags)
|
||
|
{
|
||
|
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 *tv, struct timezone *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 *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 *tv, struct timezone *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);
|
||
|
}
|
||
|
|
||
|
/* 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 long sys32_pread64(unsigned int fd, char *ubuf,
|
||
|
size_t count, u32 poshi, u32 poslo)
|
||
|
{
|
||
|
if ((compat_ssize_t) count < 0)
|
||
|
return -EINVAL;
|
||
|
return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_pwrite64(unsigned int fd, const char *ubuf,
|
||
|
size_t count, u32 poshi, u32 poslo)
|
||
|
{
|
||
|
if ((compat_ssize_t) count < 0)
|
||
|
return -EINVAL;
|
||
|
return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
|
||
|
}
|
||
|
|
||
|
asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
|
||
|
{
|
||
|
return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t *offset, 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 ? &of : NULL, count);
|
||
|
set_fs(old_fs);
|
||
|
|
||
|
if (!ret && offset && put_user(of, offset))
|
||
|
return -EFAULT;
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
|
||
|
compat_loff_t *offset, s32 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 ? &lof : NULL, count);
|
||
|
set_fs(old_fs);
|
||
|
|
||
|
if (offset && put_user(lof, offset))
|
||
|
return -EFAULT;
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
/* Handle adjtimex compatibility. */
|
||
|
|
||
|
struct timex32 {
|
||
|
u32 modes;
|
||
|
s32 offset, freq, maxerror, esterror;
|
||
|
s32 status, constant, precision, tolerance;
|
||
|
struct compat_timeval time;
|
||
|
s32 tick;
|
||
|
s32 ppsfreq, jitter, shift, stabil;
|
||
|
s32 jitcnt, calcnt, errcnt, stbcnt;
|
||
|
s32 :32; s32 :32; s32 :32; s32 :32;
|
||
|
s32 :32; s32 :32; s32 :32; s32 :32;
|
||
|
s32 :32; s32 :32; s32 :32; s32 :32;
|
||
|
};
|
||
|
|
||
|
extern int do_adjtimex(struct timex *);
|
||
|
|
||
|
asmlinkage long sys32_adjtimex(struct timex32 *utp)
|
||
|
{
|
||
|
struct timex txc;
|
||
|
int ret;
|
||
|
|
||
|
memset(&txc, 0, sizeof(struct timex));
|
||
|
|
||
|
if(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(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))
|
||
|
ret = -EFAULT;
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
#ifdef CONFIG_SYSCTL
|
||
|
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 *args)
|
||
|
{
|
||
|
struct __sysctl_args32 tmp;
|
||
|
int error;
|
||
|
size_t oldlen, *oldlenp = NULL;
|
||
|
unsigned long addr = (((long)&args->__unused[0]) + 7) & ~7;
|
||
|
|
||
|
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 *)A(tmp.oldlenp)) ||
|
||
|
put_user(oldlen, (size_t *)addr))
|
||
|
return -EFAULT;
|
||
|
oldlenp = (size_t *)addr;
|
||
|
}
|
||
|
|
||
|
lock_kernel();
|
||
|
error = do_sysctl((int *)A(tmp.name), tmp.nlen, (void *)A(tmp.oldval),
|
||
|
oldlenp, (void *)A(tmp.newval), tmp.newlen);
|
||
|
unlock_kernel();
|
||
|
if (oldlenp) {
|
||
|
if (!error) {
|
||
|
if (get_user(oldlen, (size_t *)addr) ||
|
||
|
put_user(oldlen, (u32 *)A(tmp.oldlenp)))
|
||
|
error = -EFAULT;
|
||
|
}
|
||
|
copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
|
||
|
}
|
||
|
return error;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
struct stat64_emu31 {
|
||
|
unsigned long long st_dev;
|
||
|
unsigned int __pad1;
|
||
|
#define STAT64_HAS_BROKEN_ST_INO 1
|
||
|
u32 __st_ino;
|
||
|
unsigned int st_mode;
|
||
|
unsigned int st_nlink;
|
||
|
u32 st_uid;
|
||
|
u32 st_gid;
|
||
|
unsigned long long st_rdev;
|
||
|
unsigned int __pad3;
|
||
|
long st_size;
|
||
|
u32 st_blksize;
|
||
|
unsigned char __pad4[4];
|
||
|
u32 __pad5; /* future possible st_blocks high bits */
|
||
|
u32 st_blocks; /* Number 512-byte blocks allocated. */
|
||
|
u32 st_atime;
|
||
|
u32 __pad6;
|
||
|
u32 st_mtime;
|
||
|
u32 __pad7;
|
||
|
u32 st_ctime;
|
||
|
u32 __pad8; /* will be high 32 bits of ctime someday */
|
||
|
unsigned long st_ino;
|
||
|
};
|
||
|
|
||
|
static int cp_stat64(struct stat64_emu31 *ubuf, struct kstat *stat)
|
||
|
{
|
||
|
struct stat64_emu31 tmp;
|
||
|
|
||
|
memset(&tmp, 0, sizeof(tmp));
|
||
|
|
||
|
tmp.st_dev = huge_encode_dev(stat->dev);
|
||
|
tmp.st_ino = stat->ino;
|
||
|
tmp.__st_ino = (u32)stat->ino;
|
||
|
tmp.st_mode = stat->mode;
|
||
|
tmp.st_nlink = (unsigned int)stat->nlink;
|
||
|
tmp.st_uid = stat->uid;
|
||
|
tmp.st_gid = stat->gid;
|
||
|
tmp.st_rdev = huge_encode_dev(stat->rdev);
|
||
|
tmp.st_size = stat->size;
|
||
|
tmp.st_blksize = (u32)stat->blksize;
|
||
|
tmp.st_blocks = (u32)stat->blocks;
|
||
|
tmp.st_atime = (u32)stat->atime.tv_sec;
|
||
|
tmp.st_mtime = (u32)stat->mtime.tv_sec;
|
||
|
tmp.st_ctime = (u32)stat->ctime.tv_sec;
|
||
|
|
||
|
return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_stat64(char * filename, struct stat64_emu31 * statbuf)
|
||
|
{
|
||
|
struct kstat stat;
|
||
|
int ret = vfs_stat(filename, &stat);
|
||
|
if (!ret)
|
||
|
ret = cp_stat64(statbuf, &stat);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_lstat64(char * filename, struct stat64_emu31 * statbuf)
|
||
|
{
|
||
|
struct kstat stat;
|
||
|
int ret = vfs_lstat(filename, &stat);
|
||
|
if (!ret)
|
||
|
ret = cp_stat64(statbuf, &stat);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 * statbuf)
|
||
|
{
|
||
|
struct kstat stat;
|
||
|
int ret = vfs_fstat(fd, &stat);
|
||
|
if (!ret)
|
||
|
ret = cp_stat64(statbuf, &stat);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Linux/i386 didn't use to be able to handle more than
|
||
|
* 4 system call parameters, so these system calls used a memory
|
||
|
* block for parameter passing..
|
||
|
*/
|
||
|
|
||
|
struct mmap_arg_struct_emu31 {
|
||
|
u32 addr;
|
||
|
u32 len;
|
||
|
u32 prot;
|
||
|
u32 flags;
|
||
|
u32 fd;
|
||
|
u32 offset;
|
||
|
};
|
||
|
|
||
|
/* common code for old and new mmaps */
|
||
|
static inline long do_mmap2(
|
||
|
unsigned long addr, unsigned long len,
|
||
|
unsigned long prot, unsigned long flags,
|
||
|
unsigned long fd, unsigned long pgoff)
|
||
|
{
|
||
|
struct file * file = NULL;
|
||
|
unsigned long error = -EBADF;
|
||
|
|
||
|
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
||
|
if (!(flags & MAP_ANONYMOUS)) {
|
||
|
file = fget(fd);
|
||
|
if (!file)
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
down_write(¤t->mm->mmap_sem);
|
||
|
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
|
||
|
if (!IS_ERR((void *) error) && error + len >= 0x80000000ULL) {
|
||
|
/* Result is out of bounds. */
|
||
|
do_munmap(current->mm, addr, len);
|
||
|
error = -ENOMEM;
|
||
|
}
|
||
|
up_write(¤t->mm->mmap_sem);
|
||
|
|
||
|
if (file)
|
||
|
fput(file);
|
||
|
out:
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
|
||
|
asmlinkage unsigned long
|
||
|
old32_mmap(struct mmap_arg_struct_emu31 *arg)
|
||
|
{
|
||
|
struct mmap_arg_struct_emu31 a;
|
||
|
int error = -EFAULT;
|
||
|
|
||
|
if (copy_from_user(&a, arg, sizeof(a)))
|
||
|
goto out;
|
||
|
|
||
|
error = -EINVAL;
|
||
|
if (a.offset & ~PAGE_MASK)
|
||
|
goto out;
|
||
|
|
||
|
error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
|
||
|
out:
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
asmlinkage long
|
||
|
sys32_mmap2(struct mmap_arg_struct_emu31 *arg)
|
||
|
{
|
||
|
struct mmap_arg_struct_emu31 a;
|
||
|
int error = -EFAULT;
|
||
|
|
||
|
if (copy_from_user(&a, arg, sizeof(a)))
|
||
|
goto out;
|
||
|
error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
|
||
|
out:
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_read(unsigned int fd, char * buf, size_t count)
|
||
|
{
|
||
|
if ((compat_ssize_t) count < 0)
|
||
|
return -EINVAL;
|
||
|
|
||
|
return sys_read(fd, buf, count);
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_write(unsigned int fd, char * buf, size_t count)
|
||
|
{
|
||
|
if ((compat_ssize_t) count < 0)
|
||
|
return -EINVAL;
|
||
|
|
||
|
return sys_write(fd, buf, count);
|
||
|
}
|
||
|
|
||
|
asmlinkage long sys32_clone(struct pt_regs regs)
|
||
|
{
|
||
|
unsigned long clone_flags;
|
||
|
unsigned long newsp;
|
||
|
int *parent_tidptr, *child_tidptr;
|
||
|
|
||
|
clone_flags = regs.gprs[3] & 0xffffffffUL;
|
||
|
newsp = regs.orig_gpr2 & 0x7fffffffUL;
|
||
|
parent_tidptr = (int *) (regs.gprs[4] & 0x7fffffffUL);
|
||
|
child_tidptr = (int *) (regs.gprs[5] & 0x7fffffffUL);
|
||
|
if (!newsp)
|
||
|
newsp = regs.gprs[15];
|
||
|
return do_fork(clone_flags, newsp, ®s, 0,
|
||
|
parent_tidptr, child_tidptr);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Wrapper function for sys_timer_create.
|
||
|
*/
|
||
|
extern asmlinkage long
|
||
|
sys_timer_create(clockid_t, struct sigevent *, timer_t *);
|
||
|
|
||
|
asmlinkage long
|
||
|
sys32_timer_create(clockid_t which_clock, struct compat_sigevent *se32,
|
||
|
timer_t *timer_id)
|
||
|
{
|
||
|
struct sigevent se;
|
||
|
timer_t ktimer_id;
|
||
|
mm_segment_t old_fs;
|
||
|
long ret;
|
||
|
|
||
|
if (se32 == NULL)
|
||
|
return sys_timer_create(which_clock, NULL, timer_id);
|
||
|
|
||
|
if (get_compat_sigevent(&se, se32))
|
||
|
return -EFAULT;
|
||
|
|
||
|
old_fs = get_fs();
|
||
|
set_fs(KERNEL_DS);
|
||
|
ret = sys_timer_create(which_clock, &se, &ktimer_id);
|
||
|
set_fs(old_fs);
|
||
|
|
||
|
if (!ret)
|
||
|
ret = put_user (ktimer_id, timer_id);
|
||
|
|
||
|
return ret;
|
||
|
}
|