868 строки
21 KiB
C
868 строки
21 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/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/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/capability.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 <linux/fadvise.h>
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#include <linux/ipc.h>
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#include <asm/types.h>
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#include <asm/uaccess.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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long psw_user32_bits = (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME |
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PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
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PSW_MASK_PSTATE | PSW_DEFAULT_KEY);
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long psw32_user_bits = (PSW32_BASE_BITS | PSW32_MASK_DAT | PSW32_ASC_HOME |
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PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK |
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PSW32_MASK_PSTATE);
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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 __user * 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 __user * 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 __user *ruid, u16 __user *euid, u16 __user *suid)
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{
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int retval;
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if (!(retval = put_user(high2lowuid(current->cred->uid), ruid)) &&
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!(retval = put_user(high2lowuid(current->cred->euid), euid)))
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retval = put_user(high2lowuid(current->cred->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 __user *rgid, u16 __user *egid, u16 __user *sgid)
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{
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int retval;
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if (!(retval = put_user(high2lowgid(current->cred->gid), rgid)) &&
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!(retval = put_user(high2lowgid(current->cred->egid), egid)))
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retval = put_user(high2lowgid(current->cred->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 __user *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 __user *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 __user *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->cred->group_info);
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i = current->cred->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->cred->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->cred->group_info);
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return i;
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}
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asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *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->cred->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->cred->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->cred->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->cred->egid);
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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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#ifdef CONFIG_SYSVIPC
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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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return -ENOSYS;
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}
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#endif
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asmlinkage long sys32_truncate64(const char __user * 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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asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
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struct compat_timespec __user *interval)
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{
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struct timespec t;
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int ret;
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mm_segment_t old_fs = get_fs ();
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set_fs (KERNEL_DS);
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ret = sys_sched_rr_get_interval(pid,
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(struct timespec __force __user *) &t);
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set_fs (old_fs);
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if (put_compat_timespec(&t, interval))
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return -EFAULT;
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return ret;
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}
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asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
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compat_sigset_t __user *oset, size_t sigsetsize)
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{
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sigset_t s;
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compat_sigset_t s32;
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int ret;
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mm_segment_t old_fs = get_fs();
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if (set) {
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if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
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return -EFAULT;
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switch (_NSIG_WORDS) {
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case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
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case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
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case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
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case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
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}
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}
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set_fs (KERNEL_DS);
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ret = sys_rt_sigprocmask(how,
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set ? (sigset_t __force __user *) &s : NULL,
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oset ? (sigset_t __force __user *) &s : NULL,
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sigsetsize);
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set_fs (old_fs);
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if (ret) return ret;
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if (oset) {
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switch (_NSIG_WORDS) {
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case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
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case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
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case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
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case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
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}
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if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
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return -EFAULT;
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}
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return 0;
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}
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asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
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size_t sigsetsize)
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{
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sigset_t s;
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compat_sigset_t s32;
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int ret;
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mm_segment_t old_fs = get_fs();
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set_fs (KERNEL_DS);
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ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize);
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set_fs (old_fs);
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if (!ret) {
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switch (_NSIG_WORDS) {
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case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
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case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
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case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
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case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
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}
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if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
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return -EFAULT;
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}
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return ret;
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}
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asmlinkage long
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sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
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{
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siginfo_t info;
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int ret;
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mm_segment_t old_fs = get_fs();
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if (copy_siginfo_from_user32(&info, uinfo))
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return -EFAULT;
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set_fs (KERNEL_DS);
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ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info);
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set_fs (old_fs);
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return ret;
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}
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/*
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* sys32_execve() executes a new program after the asm stub has set
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* things up for us. This should basically do what I want it to.
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*/
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asmlinkage long sys32_execve(void)
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{
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struct pt_regs *regs = task_pt_regs(current);
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char *filename;
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unsigned long result;
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int rc;
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filename = getname(compat_ptr(regs->orig_gpr2));
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if (IS_ERR(filename)) {
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result = PTR_ERR(filename);
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goto out;
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}
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rc = compat_do_execve(filename, compat_ptr(regs->gprs[3]),
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compat_ptr(regs->gprs[4]), regs);
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if (rc) {
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result = rc;
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goto out_putname;
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}
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task_lock(current);
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current->ptrace &= ~PT_DTRACE;
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task_unlock(current);
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current->thread.fp_regs.fpc=0;
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asm volatile("sfpc %0,0" : : "d" (0));
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result = regs->gprs[2];
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out_putname:
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putname(filename);
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out:
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return result;
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}
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|
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#ifdef CONFIG_MODULES
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|
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asmlinkage long
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sys32_init_module(void __user *umod, unsigned long len,
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const char __user *uargs)
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{
|
|
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 */
|
|
|
|
asmlinkage long sys32_pread64(unsigned int fd, char __user *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 __user *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 __user *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 ? (off_t __force __user *) &of : NULL, count);
|
|
set_fs(old_fs);
|
|
|
|
if (offset && put_user(of, offset))
|
|
return -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
|
|
compat_loff_t __user *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 ? (loff_t __force __user *) &lof : NULL,
|
|
count);
|
|
set_fs(old_fs);
|
|
|
|
if (offset && put_user(lof, offset))
|
|
return -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_SYSCTL_SYSCALL
|
|
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)
|
|
{
|
|
struct __sysctl_args32 tmp;
|
|
int error;
|
|
size_t oldlen;
|
|
size_t __user *oldlenp = NULL;
|
|
unsigned long addr = (((unsigned 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 __user *)compat_ptr(tmp.oldlenp)) ||
|
|
put_user(oldlen, (size_t __user *)addr))
|
|
return -EFAULT;
|
|
oldlenp = (size_t __user *)addr;
|
|
}
|
|
|
|
lock_kernel();
|
|
error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval),
|
|
oldlenp, compat_ptr(tmp.newval), tmp.newlen);
|
|
unlock_kernel();
|
|
if (oldlenp) {
|
|
if (!error) {
|
|
if (get_user(oldlen, (size_t __user *)addr) ||
|
|
put_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)))
|
|
error = -EFAULT;
|
|
}
|
|
if (copy_to_user(args->__unused, tmp.__unused,
|
|
sizeof(tmp.__unused)))
|
|
error = -EFAULT;
|
|
}
|
|
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 __user *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 __user * filename, struct stat64_emu31 __user * statbuf)
|
|
{
|
|
struct kstat stat;
|
|
int ret = vfs_stat(filename, &stat);
|
|
if (!ret)
|
|
ret = cp_stat64(statbuf, &stat);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long sys32_lstat64(char __user * filename, struct stat64_emu31 __user * 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 __user * statbuf)
|
|
{
|
|
struct kstat stat;
|
|
int ret = vfs_fstat(fd, &stat);
|
|
if (!ret)
|
|
ret = cp_stat64(statbuf, &stat);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename,
|
|
struct stat64_emu31 __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_stat64(statbuf, &stat);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* 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 __user *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 __user *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 __user * 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 __user * buf, size_t count)
|
|
{
|
|
if ((compat_ssize_t) count < 0)
|
|
return -EINVAL;
|
|
|
|
return sys_write(fd, buf, count);
|
|
}
|
|
|
|
asmlinkage long sys32_clone(void)
|
|
{
|
|
struct pt_regs *regs = task_pt_regs(current);
|
|
unsigned long clone_flags;
|
|
unsigned long newsp;
|
|
int __user *parent_tidptr, *child_tidptr;
|
|
|
|
clone_flags = regs->gprs[3] & 0xffffffffUL;
|
|
newsp = regs->orig_gpr2 & 0x7fffffffUL;
|
|
parent_tidptr = compat_ptr(regs->gprs[4]);
|
|
child_tidptr = compat_ptr(regs->gprs[5]);
|
|
if (!newsp)
|
|
newsp = regs->gprs[15];
|
|
return do_fork(clone_flags, newsp, regs, 0,
|
|
parent_tidptr, child_tidptr);
|
|
}
|
|
|
|
/*
|
|
* 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
|
|
* These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
|
|
* because the 31 bit values differ from the 64 bit values.
|
|
*/
|
|
|
|
asmlinkage long
|
|
sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
|
|
{
|
|
if (advise == 4)
|
|
advise = POSIX_FADV_DONTNEED;
|
|
else if (advise == 5)
|
|
advise = POSIX_FADV_NOREUSE;
|
|
return sys_fadvise64(fd, offset, len, advise);
|
|
}
|
|
|
|
struct fadvise64_64_args {
|
|
int fd;
|
|
long long offset;
|
|
long long len;
|
|
int advice;
|
|
};
|
|
|
|
asmlinkage long
|
|
sys32_fadvise64_64(struct fadvise64_64_args __user *args)
|
|
{
|
|
struct fadvise64_64_args a;
|
|
|
|
if ( copy_from_user(&a, args, sizeof(a)) )
|
|
return -EFAULT;
|
|
if (a.advice == 4)
|
|
a.advice = POSIX_FADV_DONTNEED;
|
|
else if (a.advice == 5)
|
|
a.advice = POSIX_FADV_NOREUSE;
|
|
return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
|
|
}
|