// SPDX-License-Identifier: GPL-2.0
/*
* linux / arch / alpha / kernel / osf_sys . c
*
* Copyright ( C ) 1995 Linus Torvalds
*/
/*
* This file handles some of the stranger OSF / 1 system call interfaces .
* Some of the system calls expect a non - C calling standard , others have
* special parameter blocks . .
*/
#include <linux/errno.h>
#include <linux/sched/signal.h>
#include <linux/sched/mm.h>
#include <linux/sched/task_stack.h>
#include <linux/sched/cputime.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/stddef.h>
#include <linux/syscalls.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/utsname.h>
#include <linux/time.h>
#include <linux/timex.h>
#include <linux/major.h>
#include <linux/stat.h>
#include <linux/mman.h>
#include <linux/shm.h>
#include <linux/poll.h>
#include <linux/file.h>
#include <linux/types.h>
#include <linux/ipc.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/uio.h>
#include <linux/vfs.h>
#include <linux/rcupdate.h>
#include <linux/slab.h>
#include <asm /fpu.h>
#include <asm /io.h>
#include <linux/uaccess.h>
#include <asm /sysinfo.h>
#include <asm /thread_info.h>
#include <asm /hwrpb.h>
#include <asm /processor.h>
/*
* Brk needs to return an error . Still support Linux ' s brk ( 0 ) query idiom ,
* which OSF programs just shouldn ' t be doing . We ' re still not quite
* identical to OSF as we don ' t return 0 on success , but doing otherwise
* would require changes to libc . Hopefully this is good enough .
*/
SYSCALL_DEFINE1(osf_brk, unsigned long , brk)
{
unsigned long retval = sys_brk(brk);
if (brk && brk != retval)
retval = -ENOMEM;
return retval;
}
/*
* This is pure guess - work . .
*/
SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long , text_start,
unsigned long , text_len, unsigned long , bss_start,
unsigned long , bss_len)
{
struct mm_struct *mm;
mm = current->mm;
mm->end_code = bss_start + bss_len;
mm->start_brk = bss_start + bss_len;
mm->brk = bss_start + bss_len;
#if 0
printk("set_program_attributes(%lx %lx %lx %lx)\n" ,
text_start, text_len, bss_start, bss_len);
#endif
return 0 ;
}
/*
* OSF / 1 directory handling functions . . .
*
* The " getdents ( ) " interface is much more sane : the " basep " stuff is
* braindamage ( it can ' t really handle filesystems where the directory
* offset differences aren ' t the same as " d_reclen " ) .
*/
#define NAME_OFFSET offsetof (struct osf_dirent, d_name)
struct osf_dirent {
unsigned int d_ino;
unsigned short d_reclen;
unsigned short d_namlen;
char d_name[];
};
struct osf_dirent_callback {
struct dir_context ctx;
struct osf_dirent __user *dirent;
long __user *basep;
unsigned int count;
int error;
};
static bool
osf_filldir(struct dir_context *ctx, const char *name, int namlen,
loff_t offset, u64 ino, unsigned int d_type)
{
struct osf_dirent __user *dirent;
struct osf_dirent_callback *buf =
container_of(ctx, struct osf_dirent_callback, ctx);
unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1 , sizeof (u32));
unsigned int d_ino;
buf->error = -EINVAL; /* only used if we fail */
if (reclen > buf->count)
return false ;
d_ino = ino;
if (sizeof (d_ino) < sizeof (ino) && d_ino != ino) {
buf->error = -EOVERFLOW;
return false ;
}
if (buf->basep) {
if (put_user(offset, buf->basep))
goto Efault;
buf->basep = NULL;
}
dirent = buf->dirent;
if (put_user(d_ino, &dirent->d_ino) ||
put_user(namlen, &dirent->d_namlen) ||
put_user(reclen, &dirent->d_reclen) ||
copy_to_user(dirent->d_name, name, namlen) ||
put_user(0 , dirent->d_name + namlen))
goto Efault;
dirent = (void __user *)dirent + reclen;
buf->dirent = dirent;
buf->count -= reclen;
return true ;
Efault:
buf->error = -EFAULT;
return false ;
}
SYSCALL_DEFINE4(osf_getdirentries, unsigned int , fd,
struct osf_dirent __user *, dirent, unsigned int , count,
long __user *, basep)
{
int error;
CLASS (fd_pos, arg)(fd);
struct osf_dirent_callback buf = {
.ctx.actor = osf_filldir,
.dirent = dirent,
.basep = basep,
.count = count
};
if (fd_empty(arg))
return -EBADF;
error = iterate_dir(fd_file(arg), &buf.ctx);
if (error >= 0 )
error = buf.error;
if (count != buf.count)
error = count - buf.count;
return error;
}
#undef NAME_OFFSET
SYSCALL_DEFINE6(osf_mmap, unsigned long , addr, unsigned long , len,
unsigned long , prot, unsigned long , flags, unsigned long , fd,
unsigned long , off)
{
unsigned long ret = -EINVAL;
#if 0
if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
printk("%s: unimplemented OSF mmap flags %04lx\n" ,
current->comm, flags);
#endif
if ((off + PAGE_ALIGN(len)) < off)
goto out;
if (off & ~PAGE_MASK)
goto out;
ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
out:
return ret;
}
struct osf_stat {
int st_dev;
int st_pad1;
unsigned st_mode;
unsigned short st_nlink;
short st_nlink_reserved;
unsigned st_uid;
unsigned st_gid;
int st_rdev;
int st_ldev;
long st_size;
int st_pad2;
int st_uatime;
int st_pad3;
int st_umtime;
int st_pad4;
int st_uctime;
int st_pad5;
int st_pad6;
unsigned st_flags;
unsigned st_gen;
long st_spare[4 ];
unsigned st_ino;
int st_ino_reserved;
int st_atime;
int st_atime_reserved;
int st_mtime;
int st_mtime_reserved;
int st_ctime;
int st_ctime_reserved;
long st_blksize;
long st_blocks;
};
/*
* The OSF / 1 statfs structure is much larger , but this should
* match the beginning , at least .
*/
struct osf_statfs {
short f_type;
short f_flags;
int f_fsize;
int f_bsize;
int f_blocks;
int f_bfree;
int f_bavail;
int f_files;
int f_ffree;
__kernel_fsid_t f_fsid;
};
struct osf_statfs64 {
short f_type;
short f_flags;
int f_pad1;
int f_pad2;
int f_pad3;
int f_pad4;
int f_pad5;
int f_pad6;
int f_pad7;
__kernel_fsid_t f_fsid;
u_short f_namemax;
short f_reserved1;
int f_spare[8 ];
char f_pad8[90 ];
char f_pad9[90 ];
long mount_info[10 ];
u_long f_flags2;
long f_spare2[14 ];
long f_fsize;
long f_bsize;
long f_blocks;
long f_bfree;
long f_bavail;
long f_files;
long f_ffree;
};
static int
linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
{
struct osf_stat tmp = { 0 };
tmp.st_dev = lstat->dev;
tmp.st_mode = lstat->mode;
tmp.st_nlink = lstat->nlink;
tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
tmp.st_rdev = lstat->rdev;
tmp.st_ldev = lstat->rdev;
tmp.st_size = lstat->size;
tmp.st_uatime = lstat->atime.tv_nsec / 1000 ;
tmp.st_umtime = lstat->mtime.tv_nsec / 1000 ;
tmp.st_uctime = lstat->ctime.tv_nsec / 1000 ;
tmp.st_ino = lstat->ino;
tmp.st_atime = lstat->atime.tv_sec;
tmp.st_mtime = lstat->mtime.tv_sec;
tmp.st_ctime = lstat->ctime.tv_sec;
tmp.st_blksize = lstat->blksize;
tmp.st_blocks = lstat->blocks;
return copy_to_user(osf_stat, &tmp, sizeof (tmp)) ? -EFAULT : 0 ;
}
static int
linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
unsigned long bufsiz)
{
struct osf_statfs tmp_stat;
tmp_stat.f_type = linux_stat->f_type;
tmp_stat.f_flags = 0 ; /* mount flags */
tmp_stat.f_fsize = linux_stat->f_frsize;
tmp_stat.f_bsize = linux_stat->f_bsize;
tmp_stat.f_blocks = linux_stat->f_blocks;
tmp_stat.f_bfree = linux_stat->f_bfree;
tmp_stat.f_bavail = linux_stat->f_bavail;
tmp_stat.f_files = linux_stat->f_files;
tmp_stat.f_ffree = linux_stat->f_ffree;
tmp_stat.f_fsid = linux_stat->f_fsid;
if (bufsiz > sizeof (tmp_stat))
bufsiz = sizeof (tmp_stat);
return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0 ;
}
static int
linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
unsigned long bufsiz)
{
struct osf_statfs64 tmp_stat = { 0 };
tmp_stat.f_type = linux_stat->f_type;
tmp_stat.f_fsize = linux_stat->f_frsize;
tmp_stat.f_bsize = linux_stat->f_bsize;
tmp_stat.f_blocks = linux_stat->f_blocks;
tmp_stat.f_bfree = linux_stat->f_bfree;
tmp_stat.f_bavail = linux_stat->f_bavail;
tmp_stat.f_files = linux_stat->f_files;
tmp_stat.f_ffree = linux_stat->f_ffree;
tmp_stat.f_fsid = linux_stat->f_fsid;
if (bufsiz > sizeof (tmp_stat))
bufsiz = sizeof (tmp_stat);
return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0 ;
}
SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
struct osf_statfs __user *, buffer, unsigned long , bufsiz)
{
struct kstatfs linux_stat;
int error = user_statfs(pathname, &linux_stat);
if (!error)
error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
return error;
}
SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
{
struct kstat stat;
int error;
error = vfs_stat(name, &stat);
if (error)
return error;
return linux_to_osf_stat(&stat, buf);
}
SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
{
struct kstat stat;
int error;
error = vfs_lstat(name, &stat);
if (error)
return error;
return linux_to_osf_stat(&stat, buf);
}
SYSCALL_DEFINE2(osf_fstat, int , fd, struct osf_stat __user *, buf)
{
struct kstat stat;
int error;
error = vfs_fstat(fd, &stat);
if (error)
return error;
return linux_to_osf_stat(&stat, buf);
}
SYSCALL_DEFINE3(osf_fstatfs, unsigned long , fd,
struct osf_statfs __user *, buffer, unsigned long , bufsiz)
{
struct kstatfs linux_stat;
int error = fd_statfs(fd, &linux_stat);
if (!error)
error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
return error;
}
SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
struct osf_statfs64 __user *, buffer, unsigned long , bufsiz)
{
struct kstatfs linux_stat;
int error = user_statfs(pathname, &linux_stat);
if (!error)
error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
return error;
}
SYSCALL_DEFINE3(osf_fstatfs64, unsigned long , fd,
struct osf_statfs64 __user *, buffer, unsigned long , bufsiz)
{
struct kstatfs linux_stat;
int error = fd_statfs(fd, &linux_stat);
if (!error)
error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
return error;
}
/*
* Uhh . . OSF / 1 mount parameters aren ' t exactly obvious . .
*
* Although to be frank , neither are the native Linux / i386 ones . .
*/
struct ufs_args {
char __user *devname;
int flags;
uid_t exroot;
};
struct cdfs_args {
char __user *devname;
int flags;
uid_t exroot;
/* This has lots more here, which Linux handles with the option block
but I'm too lazy to do the translation into ASCII. */
};
struct procfs_args {
char __user *devname;
int flags;
uid_t exroot;
};
/*
* We can ' t actually handle ufs yet , so we translate UFS mounts to
* ext2fs mounts . I wouldn ' t mind a UFS filesystem , but the UFS
* layout is so braindead it ' s a major headache doing it .
*
* Just how long ago was it written ? OTOH our UFS driver may be still
* unhappy with OSF UFS . [ CHECKME ]
*/
static int
osf_ufs_mount(const char __user *dirname,
struct ufs_args __user *args, int flags)
{
int retval;
struct cdfs_args tmp;
struct filename *devname;
retval = -EFAULT;
if (copy_from_user(&tmp, args, sizeof (tmp)))
goto out;
devname = getname(tmp.devname);
retval = PTR_ERR(devname);
if (IS_ERR(devname))
goto out;
retval = do_mount(devname->name, dirname, "ext2" , flags, NULL);
putname(devname);
out:
return retval;
}
static int
osf_cdfs_mount(const char __user *dirname,
struct cdfs_args __user *args, int flags)
{
int retval;
struct cdfs_args tmp;
struct filename *devname;
retval = -EFAULT;
if (copy_from_user(&tmp, args, sizeof (tmp)))
goto out;
devname = getname(tmp.devname);
retval = PTR_ERR(devname);
if (IS_ERR(devname))
goto out;
retval = do_mount(devname->name, dirname, "iso9660" , flags, NULL);
putname(devname);
out:
return retval;
}
static int
osf_procfs_mount(const char __user *dirname,
struct procfs_args __user *args, int flags)
{
struct procfs_args tmp;
if (copy_from_user(&tmp, args, sizeof (tmp)))
return -EFAULT;
return do_mount("" , dirname, "proc" , flags, NULL);
}
SYSCALL_DEFINE4(osf_mount, unsigned long , typenr, const char __user *, path,
int , flag, void __user *, data)
{
int retval;
switch (typenr) {
case 1 :
retval = osf_ufs_mount(path, data, flag);
break ;
case 6 :
retval = osf_cdfs_mount(path, data, flag);
break ;
case 9 :
retval = osf_procfs_mount(path, data, flag);
break ;
default :
retval = -EINVAL;
printk_ratelimited("osf_mount(%ld, %x)\n" , typenr, flag);
}
return retval;
}
SYSCALL_DEFINE1(osf_utsname, char __user *, name)
{
char tmp[5 * 32 ];
down_read(&uts_sem);
memcpy(tmp + 0 * 32 , utsname()->sysname, 32 );
memcpy(tmp + 1 * 32 , utsname()->nodename, 32 );
memcpy(tmp + 2 * 32 , utsname()->release, 32 );
memcpy(tmp + 3 * 32 , utsname()->version, 32 );
memcpy(tmp + 4 * 32 , utsname()->machine, 32 );
up_read(&uts_sem);
if (copy_to_user(name, tmp, sizeof (tmp)))
return -EFAULT;
return 0 ;
}
SYSCALL_DEFINE0(getpagesize)
{
return PAGE_SIZE;
}
SYSCALL_DEFINE0(getdtablesize)
{
return sysctl_nr_open;
}
/*
* For compatibility with OSF / 1 only . Use utsname ( 2 ) instead .
*/
SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int , namelen)
{
int len;
char *kname;
char tmp[32 ];
if (namelen < 0 || namelen > 32 )
namelen = 32 ;
down_read(&uts_sem);
kname = utsname()->domainname;
len = strnlen(kname, namelen);
len = min(len + 1 , namelen);
memcpy(tmp, kname, len);
up_read(&uts_sem);
if (copy_to_user(name, tmp, len))
return -EFAULT;
return 0 ;
}
/*
* The following stuff should move into a header file should it ever
* be labeled " officially supported . " Right now , there is just enough
* support to avoid applications ( such as tar ) printing error
* messages . The attributes are not really implemented .
*/
/*
* Values for Property list entry flag
*/
#define PLE_PROPAGATE_ON_COPY 0 x1 /* cp(1) will copy entry
by default */
#define PLE_FLAG_MASK 0 x1 /* Valid flag values */
#define PLE_FLAG_ALL -1 /* All flag value */
struct proplistname_args {
unsigned int pl_mask;
unsigned int pl_numnames;
char **pl_names;
};
union pl_args {
struct setargs {
char __user *path;
long follow;
long nbytes;
char __user *buf;
} set;
struct fsetargs {
long fd;
long nbytes;
char __user *buf;
} fset;
struct getargs {
char __user *path;
long follow;
struct proplistname_args __user *name_args;
long nbytes;
char __user *buf;
int __user *min_buf_size;
} get;
struct fgetargs {
long fd;
struct proplistname_args __user *name_args;
long nbytes;
char __user *buf;
int __user *min_buf_size;
} fget;
struct delargs {
char __user *path;
long follow;
struct proplistname_args __user *name_args;
} del;
struct fdelargs {
long fd;
struct proplistname_args __user *name_args;
} fdel;
};
enum pl_code {
PL_SET = 1 , PL_FSET = 2 ,
PL_GET = 3 , PL_FGET = 4 ,
PL_DEL = 5 , PL_FDEL = 6
};
SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
union pl_args __user *, args)
{
long error;
int __user *min_buf_size_ptr;
switch (code) {
case PL_SET:
if (get_user(error, &args->set.nbytes))
error = -EFAULT;
break ;
case PL_FSET:
if (get_user(error, &args->fset.nbytes))
error = -EFAULT;
break ;
case PL_GET:
error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
if (error)
break ;
error = put_user(0 , min_buf_size_ptr);
break ;
case PL_FGET:
error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
if (error)
break ;
error = put_user(0 , min_buf_size_ptr);
break ;
case PL_DEL:
case PL_FDEL:
error = 0 ;
break ;
default :
error = -EOPNOTSUPP;
break ;
}
return error;
}
SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
struct sigstack __user *, uoss)
{
unsigned long usp = rdusp();
unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
unsigned long oss_os = on_sig_stack(usp);
int error;
if (uss) {
void __user *ss_sp;
error = -EFAULT;
if (get_user(ss_sp, &uss->ss_sp))
goto out;
/* If the current stack was set with sigaltstack, don't
swap stacks while we are on it. */
error = -EPERM;
if (current->sas_ss_sp && on_sig_stack(usp))
goto out;
/* Since we don't know the extent of the stack, and we don't
track onstack - ness , but rather calculate it , we must
presume a size. Ho hum this interface is lossy. */
current->sas_ss_sp = (unsigned long )ss_sp - SIGSTKSZ;
current->sas_ss_size = SIGSTKSZ;
}
if (uoss) {
error = -EFAULT;
if (put_user(oss_sp, &uoss->ss_sp) ||
put_user(oss_os, &uoss->ss_onstack))
goto out;
}
error = 0 ;
out:
return error;
}
SYSCALL_DEFINE3(osf_sysinfo, int , command, char __user *, buf, long , count)
{
const char *sysinfo_table[] = {
utsname()->sysname,
utsname()->nodename,
utsname()->release,
utsname()->version,
utsname()->machine,
"alpha" , /* instruction set architecture */
"dummy" , /* hardware serial number */
"dummy" , /* hardware manufacturer */
"dummy" , /* secure RPC domain */
};
unsigned long offset;
const char *res;
long len;
char tmp[__NEW_UTS_LEN + 1 ];
offset = command-1 ;
if (offset >= ARRAY_SIZE(sysinfo_table)) {
/* Digital UNIX has a few unpublished interfaces here */
printk("sysinfo(%d)" , command);
return -EINVAL;
}
down_read(&uts_sem);
res = sysinfo_table[offset];
len = strlen(res)+1 ;
if ((unsigned long )len > (unsigned long )count)
len = count;
memcpy(tmp, res, len);
up_read(&uts_sem);
if (copy_to_user(buf, tmp, len))
return -EFAULT;
return 0 ;
}
SYSCALL_DEFINE5(osf_getsysinfo, unsigned long , op, void __user *, buffer,
unsigned long , nbytes, int __user *, start, void __user *, arg)
{
unsigned long w;
struct percpu_struct *cpu;
switch (op) {
case GSI_IEEE_FP_CONTROL:
/* Return current software fp control & status bits. */
/* Note that DU doesn't verify available space here. */
w = current_thread_info()->ieee_state & IEEE_SW_MASK;
w = swcr_update_status(w, rdfpcr());
if (put_user(w, (unsigned long __user *) buffer))
return -EFAULT;
return 0 ;
case GSI_IEEE_STATE_AT_SIGNAL:
/*
* Not sure anybody will ever use this weird stuff . These
* ops can be used ( under OSF / 1 ) to set the fpcr that should
* be used when a signal handler starts executing .
*/
break ;
case GSI_UACPROC:
if (nbytes < sizeof (unsigned int ))
return -EINVAL;
w = current_thread_info()->status & UAC_BITMASK;
if (put_user(w, (unsigned int __user *)buffer))
return -EFAULT;
return 1 ;
case GSI_PROC_TYPE:
if (nbytes < sizeof (unsigned long ))
return -EINVAL;
cpu = (struct percpu_struct*)
((char *)hwrpb + hwrpb->processor_offset);
w = cpu->type;
if (put_user(w, (unsigned long __user*)buffer))
return -EFAULT;
return 1 ;
case GSI_GET_HWRPB:
if (nbytes > sizeof (*hwrpb))
return -EINVAL;
if (copy_to_user(buffer, hwrpb, nbytes) != 0 )
return -EFAULT;
return 1 ;
default :
break ;
}
return -EOPNOTSUPP;
}
SYSCALL_DEFINE5(osf_setsysinfo, unsigned long , op, void __user *, buffer,
unsigned long , nbytes, int __user *, start, void __user *, arg)
{
switch (op) {
case SSI_IEEE_FP_CONTROL: {
unsigned long swcr, fpcr;
unsigned int *state;
/*
* Alpha Architecture Handbook 4 . 7 . 7 . 3 :
* To be fully IEEE compiant , we must track the current IEEE
* exception state in software , because spurious bits can be
* set in the trap shadow of a software - complete insn .
*/
if (get_user(swcr, (unsigned long __user *)buffer))
return -EFAULT;
state = ¤t_thread_info()->ieee_state;
/* Update software trap enable bits. */
*state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
/* Update the real fpcr. */
fpcr = rdfpcr() & FPCR_DYN_MASK;
fpcr |= ieee_swcr_to_fpcr(swcr);
wrfpcr(fpcr);
return 0 ;
}
case SSI_IEEE_RAISE_EXCEPTION: {
unsigned long exc, swcr, fpcr, fex;
unsigned int *state;
if (get_user(exc, (unsigned long __user *)buffer))
return -EFAULT;
state = ¤t_thread_info()->ieee_state;
exc &= IEEE_STATUS_MASK;
/* Update software trap enable bits. */
swcr = (*state & IEEE_SW_MASK) | exc;
*state |= exc;
/* Update the real fpcr. */
fpcr = rdfpcr();
fpcr |= ieee_swcr_to_fpcr(swcr);
wrfpcr(fpcr);
/* If any exceptions set by this call, and are unmasked,
send a signal. Old exceptions are not signaled. */
fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
if (fex) {
int si_code = FPE_FLTUNK;
if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
send_sig_fault_trapno(SIGFPE, si_code,
(void __user *)NULL, /* FIXME */
0 , current);
}
return 0 ;
}
case SSI_IEEE_STATE_AT_SIGNAL:
case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
/*
* Not sure anybody will ever use this weird stuff . These
* ops can be used ( under OSF / 1 ) to set the fpcr that should
* be used when a signal handler starts executing .
*/
break ;
case SSI_NVPAIRS: {
unsigned __user *p = buffer;
unsigned i;
for (i = 0 , p = buffer; i < nbytes; ++i, p += 2 ) {
unsigned v, w, status;
if (get_user(v, p) || get_user(w, p + 1 ))
return -EFAULT;
switch (v) {
case SSIN_UACPROC:
w &= UAC_BITMASK;
status = current_thread_info()->status;
status = (status & ~UAC_BITMASK) | w;
current_thread_info()->status = status;
break ;
default :
return -EOPNOTSUPP;
}
}
return 0 ;
}
case SSI_LMF:
return 0 ;
default :
break ;
}
return -EOPNOTSUPP;
}
/* Translations due to the fact that OSF's time_t is an int. Which
affects all sorts of things, like timeval and itimerval. */
extern struct timezone sys_tz;
struct timeval32
{
int tv_sec, tv_usec;
};
struct itimerval32
{
struct timeval32 it_interval;
struct timeval32 it_value;
};
static inline long
get_tv32(struct timespec64 *o, struct timeval32 __user *i)
{
struct timeval32 tv;
if (copy_from_user(&tv, i, sizeof (struct timeval32)))
return -EFAULT;
o->tv_sec = tv.tv_sec;
o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
return 0 ;
}
static inline long
put_tv32(struct timeval32 __user *o, struct timespec64 *i)
{
return copy_to_user(o, &(struct timeval32){
.tv_sec = i->tv_sec,
.tv_usec = i->tv_nsec / NSEC_PER_USEC},
sizeof (struct timeval32));
}
static inline long
put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i)
{
return copy_to_user(o, &(struct timeval32){
.tv_sec = i->tv_sec,
.tv_usec = i->tv_usec},
sizeof (struct timeval32));
}
static inline void
jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
{
value->tv_usec = (jiffies % HZ) * (1000000 L / HZ);
value->tv_sec = jiffies / HZ;
}
SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
struct timezone __user *, tz)
{
if (tv) {
struct timespec64 kts;
ktime_get_real_ts64(&kts);
if (put_tv32(tv, &kts))
return -EFAULT;
}
if (tz) {
if (copy_to_user(tz, &sys_tz, sizeof (sys_tz)))
return -EFAULT;
}
return 0 ;
}
SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
struct timezone __user *, tz)
{
struct timespec64 kts;
struct timezone ktz;
if (tv) {
if (get_tv32(&kts, tv))
return -EFAULT;
}
if (tz) {
if (copy_from_user(&ktz, tz, sizeof (*tz)))
return -EFAULT;
}
return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
}
SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
struct timeval32 __user *, tvs)
{
struct timespec64 tv[2 ];
if (tvs) {
if (get_tv32(&tv[0 ], &tvs[0 ]) ||
get_tv32(&tv[1 ], &tvs[1 ]))
return -EFAULT;
if (tv[0 ].tv_nsec < 0 || tv[0 ].tv_nsec >= 1000000000 ||
tv[1 ].tv_nsec < 0 || tv[1 ].tv_nsec >= 1000000000 )
return -EINVAL;
}
return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0 );
}
SYSCALL_DEFINE5(osf_select, int , n, fd_set __user *, inp, fd_set __user *, outp,
fd_set __user *, exp, struct timeval32 __user *, tvp)
{
struct timespec64 end_time, *to = NULL;
if (tvp) {
struct timespec64 tv;
to = &end_time;
if (get_tv32(&tv, tvp))
return -EFAULT;
if (tv.tv_sec < 0 || tv.tv_nsec < 0 )
return -EINVAL;
if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
return -EINVAL;
}
/* OSF does not copy back the remaining time. */
return core_sys_select(n, inp, outp, exp, to);
}
struct rusage32 {
struct timeval32 ru_utime; /* user time used */
struct timeval32 ru_stime; /* system time used */
long ru_maxrss; /* maximum resident set size */
long ru_ixrss; /* integral shared memory size */
long ru_idrss; /* integral unshared data size */
long ru_isrss; /* integral unshared stack size */
long ru_minflt; /* page reclaims */
long ru_majflt; /* page faults */
long ru_nswap; /* swaps */
long ru_inblock; /* block input operations */
long ru_oublock; /* block output operations */
long ru_msgsnd; /* messages sent */
long ru_msgrcv; /* messages received */
long ru_nsignals; /* signals received */
long ru_nvcsw; /* voluntary context switches */
long ru_nivcsw; /* involuntary " */
};
SYSCALL_DEFINE2(osf_getrusage, int , who, struct rusage32 __user *, ru)
{
struct rusage32 r;
u64 utime, stime;
unsigned long utime_jiffies, stime_jiffies;
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
return -EINVAL;
memset(&r, 0 , sizeof (r));
switch (who) {
case RUSAGE_SELF:
task_cputime(current, &utime, &stime);
utime_jiffies = nsecs_to_jiffies(utime);
stime_jiffies = nsecs_to_jiffies(stime);
jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
r.ru_minflt = current->min_flt;
r.ru_majflt = current->maj_flt;
break ;
case RUSAGE_CHILDREN:
utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
r.ru_minflt = current->signal->cmin_flt;
r.ru_majflt = current->signal->cmaj_flt;
break ;
}
return copy_to_user(ru, &r, sizeof (r)) ? -EFAULT : 0 ;
}
SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int , options,
struct rusage32 __user *, ur)
{
struct rusage r;
long err = kernel_wait4(pid, ustatus, options, &r);
if (err <= 0 )
return err;
if (!ur)
return err;
if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
return -EFAULT;
if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
return -EFAULT;
if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
sizeof (struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
return -EFAULT;
return err;
}
/*
* I don ' t know what the parameters are : the first one
* seems to be a timeval pointer , and I suspect the second
* one is the time remaining . . Ho humm . . No documentation .
*/
SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
struct timeval32 __user *, remain)
{
struct timespec64 tmp;
unsigned long ticks;
if (get_tv32(&tmp, sleep))
goto fault;
ticks = timespec64_to_jiffies(&tmp);
ticks = schedule_timeout_interruptible(ticks);
if (remain) {
jiffies_to_timespec64(ticks, &tmp);
if (put_tv32(remain, &tmp))
goto fault;
}
return 0 ;
fault:
return -EFAULT;
}
struct timex32 {
unsigned int modes; /* mode selector */
long offset; /* time offset (usec) */
long freq; /* frequency offset (scaled ppm) */
long maxerror; /* maximum error (usec) */
long esterror; /* estimated error (usec) */
int status; /* clock command/status */
long constant; /* pll time constant */
long precision; /* clock precision (usec) (read only) */
long tolerance; /* clock frequency tolerance (ppm)
* ( read only )
*/
struct timeval32 time; /* (read only) */
long tick; /* (modified) usecs between clock ticks */
long ppsfreq; /* pps frequency (scaled ppm) (ro) */
long jitter; /* pps jitter (us) (ro) */
int shift; /* interval duration (s) (shift) (ro) */
long stabil; /* pps stability (scaled ppm) (ro) */
long jitcnt; /* jitter limit exceeded (ro) */
long calcnt; /* calibration intervals (ro) */
long errcnt; /* calibration errors (ro) */
long stbcnt; /* stability limit exceeded (ro) */
int :32 ; int :32 ; int :32 ; int :32 ;
int :32 ; int :32 ; int :32 ; int :32 ;
int :32 ; int :32 ; int :32 ; int :32 ;
};
SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
{
struct __kernel_timex txc;
int ret;
/* copy relevant bits of struct timex. */
if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
copy_from_user(&txc.tick, &txc_p->tick, sizeof (struct timex32) -
offsetof(struct timex32, tick)))
return -EFAULT;
ret = do_adjtimex(&txc);
if (ret < 0 )
return ret;
/* copy back to timex32 */
if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
(copy_to_user(&txc_p->tick, &txc.tick, sizeof (struct timex32) -
offsetof(struct timex32, tick))) ||
(put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
(put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
return -EFAULT;
return ret;
}
/* Get an address range which is currently unmapped. */
static unsigned long
arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
unsigned long limit)
{
struct vm_unmapped_area_info info = {};
info.length = len;
info.low_limit = addr;
info.high_limit = limit;
return vm_unmapped_area(&info);
}
unsigned long
arch_get_unmapped_area(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff,
unsigned long flags, vm_flags_t vm_flags)
{
unsigned long limit = TASK_SIZE;
if (len > limit)
return -ENOMEM;
if (flags & MAP_FIXED)
return addr;
/* First, see if the given suggestion fits.
The OSF / 1 loader ( / sbin / loader ) relies on us returning an
address larger than the requested if one exists , which is
a terribly broken way to program .
That said , I can see the use in being able to suggest not
merely specific addresses , but regions of memory - - perhaps
this feature should be incorporated into all ports? */
if (addr) {
addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
if (addr != (unsigned long ) -ENOMEM)
return addr;
}
/* Next, try allocating at TASK_UNMAPPED_BASE. */
addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
len, limit);
if (addr != (unsigned long ) -ENOMEM)
return addr;
/* Finally, try allocating in low memory. */
addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
return addr;
}
SYSCALL_DEFINE2(osf_getpriority, int , which, int , who)
{
int prio = sys_getpriority(which, who);
if (prio >= 0 ) {
/* Return value is the unbiased priority, i.e. 20 - prio.
This does result in negative return values , so signal
no error */
force_successful_syscall_return();
prio = 20 - prio;
}
return prio;
}
SYSCALL_DEFINE0(getxuid)
{
current_pt_regs()->r20 = sys_geteuid();
return sys_getuid();
}
SYSCALL_DEFINE0(getxgid)
{
current_pt_regs()->r20 = sys_getegid();
return sys_getgid();
}
SYSCALL_DEFINE0(getxpid)
{
current_pt_regs()->r20 = sys_getppid();
return sys_getpid();
}
SYSCALL_DEFINE0(alpha_pipe)
{
int fd[2 ];
int res = do_pipe_flags(fd, 0 );
if (!res) {
/* The return values are in $0 and $20. */
current_pt_regs()->r20 = fd[1 ];
res = fd[0 ];
}
return res;
}
SYSCALL_DEFINE1(sethae, unsigned long , val)
{
current_pt_regs()->hae = val;
return 0 ;
}
Messung V0.5 in Prozent C=94 H=96 G=94
¤ Dauer der Verarbeitung: 0.32 Sekunden
(vorverarbeitet am 2026-10-01)
¤
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