1330 lines
31 KiB
C
1330 lines
31 KiB
C
![]() |
/*
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* linux/arch/alpha/kernel/osf_sys.c
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*
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* Copyright (C) 1995 Linus Torvalds
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*/
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/*
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* This file handles some of the stranger OSF/1 system call interfaces.
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* Some of the system calls expect a non-C calling standard, others have
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* special parameter blocks..
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/stddef.h>
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#include <linux/syscalls.h>
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#include <linux/unistd.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/user.h>
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#include <linux/a.out.h>
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#include <linux/utsname.h>
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#include <linux/time.h>
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#include <linux/timex.h>
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#include <linux/major.h>
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#include <linux/stat.h>
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#include <linux/mman.h>
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#include <linux/shm.h>
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#include <linux/poll.h>
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#include <linux/file.h>
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#include <linux/types.h>
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#include <linux/ipc.h>
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#include <linux/namei.h>
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#include <linux/uio.h>
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#include <linux/vfs.h>
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#include <asm/fpu.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <asm/sysinfo.h>
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#include <asm/hwrpb.h>
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#include <asm/processor.h>
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extern int do_pipe(int *);
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/*
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* Brk needs to return an error. Still support Linux's brk(0) query idiom,
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* which OSF programs just shouldn't be doing. We're still not quite
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* identical to OSF as we don't return 0 on success, but doing otherwise
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* would require changes to libc. Hopefully this is good enough.
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*/
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asmlinkage unsigned long
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osf_brk(unsigned long brk)
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{
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unsigned long retval = sys_brk(brk);
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if (brk && brk != retval)
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retval = -ENOMEM;
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return retval;
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}
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/*
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* This is pure guess-work..
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*/
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asmlinkage int
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osf_set_program_attributes(unsigned long text_start, unsigned long text_len,
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unsigned long bss_start, unsigned long bss_len)
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{
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struct mm_struct *mm;
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lock_kernel();
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mm = current->mm;
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mm->end_code = bss_start + bss_len;
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mm->brk = bss_start + bss_len;
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#if 0
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printk("set_program_attributes(%lx %lx %lx %lx)\n",
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text_start, text_len, bss_start, bss_len);
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#endif
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unlock_kernel();
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return 0;
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}
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/*
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* OSF/1 directory handling functions...
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*
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* The "getdents()" interface is much more sane: the "basep" stuff is
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* braindamage (it can't really handle filesystems where the directory
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* offset differences aren't the same as "d_reclen").
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*/
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#define NAME_OFFSET offsetof (struct osf_dirent, d_name)
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#define ROUND_UP(x) (((x)+3) & ~3)
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struct osf_dirent {
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unsigned int d_ino;
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unsigned short d_reclen;
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unsigned short d_namlen;
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char d_name[1];
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};
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struct osf_dirent_callback {
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struct osf_dirent __user *dirent;
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long __user *basep;
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unsigned int count;
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int error;
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};
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static int
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osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
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ino_t ino, unsigned int d_type)
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{
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struct osf_dirent __user *dirent;
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struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
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unsigned int reclen = ROUND_UP(NAME_OFFSET + namlen + 1);
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buf->error = -EINVAL; /* only used if we fail */
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if (reclen > buf->count)
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return -EINVAL;
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if (buf->basep) {
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if (put_user(offset, buf->basep))
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return -EFAULT;
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buf->basep = NULL;
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}
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dirent = buf->dirent;
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put_user(ino, &dirent->d_ino);
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put_user(namlen, &dirent->d_namlen);
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put_user(reclen, &dirent->d_reclen);
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if (copy_to_user(dirent->d_name, name, namlen) ||
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put_user(0, dirent->d_name + namlen))
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return -EFAULT;
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dirent = (void __user *)dirent + reclen;
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buf->dirent = dirent;
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buf->count -= reclen;
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return 0;
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}
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asmlinkage int
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osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent,
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unsigned int count, long __user *basep)
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{
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int error;
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struct file *file;
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struct osf_dirent_callback buf;
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error = -EBADF;
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file = fget(fd);
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if (!file)
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goto out;
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buf.dirent = dirent;
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buf.basep = basep;
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buf.count = count;
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buf.error = 0;
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error = vfs_readdir(file, osf_filldir, &buf);
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if (error < 0)
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goto out_putf;
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error = buf.error;
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if (count != buf.count)
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error = count - buf.count;
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out_putf:
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fput(file);
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out:
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return error;
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}
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#undef ROUND_UP
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#undef NAME_OFFSET
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asmlinkage unsigned long
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osf_mmap(unsigned long addr, unsigned long len, unsigned long prot,
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unsigned long flags, unsigned long fd, unsigned long off)
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{
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struct file *file = NULL;
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unsigned long ret = -EBADF;
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#if 0
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if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
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printk("%s: unimplemented OSF mmap flags %04lx\n",
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current->comm, flags);
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#endif
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if (!(flags & MAP_ANONYMOUS)) {
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file = fget(fd);
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if (!file)
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goto out;
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}
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flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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down_write(¤t->mm->mmap_sem);
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ret = do_mmap(file, addr, len, prot, flags, off);
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up_write(¤t->mm->mmap_sem);
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if (file)
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fput(file);
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out:
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return ret;
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}
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/*
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* The OSF/1 statfs structure is much larger, but this should
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* match the beginning, at least.
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*/
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struct osf_statfs {
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short f_type;
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short f_flags;
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int f_fsize;
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int f_bsize;
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int f_blocks;
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int f_bfree;
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int f_bavail;
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int f_files;
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int f_ffree;
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__kernel_fsid_t f_fsid;
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};
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static int
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linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
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unsigned long bufsiz)
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{
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struct osf_statfs tmp_stat;
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tmp_stat.f_type = linux_stat->f_type;
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tmp_stat.f_flags = 0; /* mount flags */
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tmp_stat.f_fsize = linux_stat->f_frsize;
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tmp_stat.f_bsize = linux_stat->f_bsize;
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tmp_stat.f_blocks = linux_stat->f_blocks;
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tmp_stat.f_bfree = linux_stat->f_bfree;
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tmp_stat.f_bavail = linux_stat->f_bavail;
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tmp_stat.f_files = linux_stat->f_files;
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tmp_stat.f_ffree = linux_stat->f_ffree;
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tmp_stat.f_fsid = linux_stat->f_fsid;
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if (bufsiz > sizeof(tmp_stat))
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bufsiz = sizeof(tmp_stat);
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return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
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}
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static int
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do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
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unsigned long bufsiz)
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{
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struct kstatfs linux_stat;
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int error = vfs_statfs(dentry->d_inode->i_sb, &linux_stat);
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if (!error)
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error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
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return error;
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}
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asmlinkage int
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osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz)
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{
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struct nameidata nd;
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int retval;
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retval = user_path_walk(path, &nd);
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if (!retval) {
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retval = do_osf_statfs(nd.dentry, buffer, bufsiz);
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path_release(&nd);
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}
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return retval;
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}
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|
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asmlinkage int
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osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz)
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{
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||
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struct file *file;
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int retval;
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||
|
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retval = -EBADF;
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|
file = fget(fd);
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||
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if (file) {
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||
|
retval = do_osf_statfs(file->f_dentry, buffer, bufsiz);
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||
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fput(file);
|
||
|
}
|
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|
return retval;
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||
|
}
|
||
|
|
||
|
/*
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||
|
* Uhh.. OSF/1 mount parameters aren't exactly obvious..
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||
|
*
|
||
|
* Although to be frank, neither are the native Linux/i386 ones..
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|
*/
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struct ufs_args {
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char __user *devname;
|
||
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int flags;
|
||
|
uid_t exroot;
|
||
|
};
|
||
|
|
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|
struct cdfs_args {
|
||
|
char __user *devname;
|
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int flags;
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||
|
uid_t exroot;
|
||
|
|
||
|
/* This has lots more here, which Linux handles with the option block
|
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|
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
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||
|
osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
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|
{
|
||
|
int retval;
|
||
|
struct cdfs_args tmp;
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||
|
char *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, dirname, "ext2", flags, NULL);
|
||
|
putname(devname);
|
||
|
out:
|
||
|
return retval;
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
|
||
|
{
|
||
|
int retval;
|
||
|
struct cdfs_args tmp;
|
||
|
char *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, dirname, "iso9660", flags, NULL);
|
||
|
putname(devname);
|
||
|
out:
|
||
|
return retval;
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
osf_procfs_mount(char *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);
|
||
|
}
|
||
|
|
||
|
asmlinkage int
|
||
|
osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data)
|
||
|
{
|
||
|
int retval = -EINVAL;
|
||
|
char *name;
|
||
|
|
||
|
lock_kernel();
|
||
|
|
||
|
name = getname(path);
|
||
|
retval = PTR_ERR(name);
|
||
|
if (IS_ERR(name))
|
||
|
goto out;
|
||
|
switch (typenr) {
|
||
|
case 1:
|
||
|
retval = osf_ufs_mount(name, data, flag);
|
||
|
break;
|
||
|
case 6:
|
||
|
retval = osf_cdfs_mount(name, data, flag);
|
||
|
break;
|
||
|
case 9:
|
||
|
retval = osf_procfs_mount(name, data, flag);
|
||
|
break;
|
||
|
default:
|
||
|
printk("osf_mount(%ld, %x)\n", typenr, flag);
|
||
|
}
|
||
|
putname(name);
|
||
|
out:
|
||
|
unlock_kernel();
|
||
|
return retval;
|
||
|
}
|
||
|
|
||
|
asmlinkage int
|
||
|
osf_utsname(char __user *name)
|
||
|
{
|
||
|
int error;
|
||
|
|
||
|
down_read(&uts_sem);
|
||
|
error = -EFAULT;
|
||
|
if (copy_to_user(name + 0, system_utsname.sysname, 32))
|
||
|
goto out;
|
||
|
if (copy_to_user(name + 32, system_utsname.nodename, 32))
|
||
|
goto out;
|
||
|
if (copy_to_user(name + 64, system_utsname.release, 32))
|
||
|
goto out;
|
||
|
if (copy_to_user(name + 96, system_utsname.version, 32))
|
||
|
goto out;
|
||
|
if (copy_to_user(name + 128, system_utsname.machine, 32))
|
||
|
goto out;
|
||
|
|
||
|
error = 0;
|
||
|
out:
|
||
|
up_read(&uts_sem);
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
asmlinkage unsigned long
|
||
|
sys_getpagesize(void)
|
||
|
{
|
||
|
return PAGE_SIZE;
|
||
|
}
|
||
|
|
||
|
asmlinkage unsigned long
|
||
|
sys_getdtablesize(void)
|
||
|
{
|
||
|
return NR_OPEN;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* For compatibility with OSF/1 only. Use utsname(2) instead.
|
||
|
*/
|
||
|
asmlinkage int
|
||
|
osf_getdomainname(char __user *name, int namelen)
|
||
|
{
|
||
|
unsigned len;
|
||
|
int i;
|
||
|
|
||
|
if (!access_ok(VERIFY_WRITE, name, namelen))
|
||
|
return -EFAULT;
|
||
|
|
||
|
len = namelen;
|
||
|
if (namelen > 32)
|
||
|
len = 32;
|
||
|
|
||
|
down_read(&uts_sem);
|
||
|
for (i = 0; i < len; ++i) {
|
||
|
__put_user(system_utsname.domainname[i], name + i);
|
||
|
if (system_utsname.domainname[i] == '\0')
|
||
|
break;
|
||
|
}
|
||
|
up_read(&uts_sem);
|
||
|
|
||
|
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 0x1 /* cp(1) will copy entry
|
||
|
by default */
|
||
|
#define PLE_FLAG_MASK 0x1 /* 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
|
||
|
};
|
||
|
|
||
|
asmlinkage long
|
||
|
osf_proplist_syscall(enum pl_code code, union pl_args __user *args)
|
||
|
{
|
||
|
long error;
|
||
|
int __user *min_buf_size_ptr;
|
||
|
|
||
|
lock_kernel();
|
||
|
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;
|
||
|
};
|
||
|
unlock_kernel();
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
asmlinkage int
|
||
|
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 (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
|
||
|
|| __put_user(oss_sp, &uoss->ss_sp)
|
||
|
|| __put_user(oss_os, &uoss->ss_onstack))
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
error = 0;
|
||
|
out:
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
asmlinkage long
|
||
|
osf_sysinfo(int command, char __user *buf, long count)
|
||
|
{
|
||
|
static char * sysinfo_table[] = {
|
||
|
system_utsname.sysname,
|
||
|
system_utsname.nodename,
|
||
|
system_utsname.release,
|
||
|
system_utsname.version,
|
||
|
system_utsname.machine,
|
||
|
"alpha", /* instruction set architecture */
|
||
|
"dummy", /* hardware serial number */
|
||
|
"dummy", /* hardware manufacturer */
|
||
|
"dummy", /* secure RPC domain */
|
||
|
};
|
||
|
unsigned long offset;
|
||
|
char *res;
|
||
|
long len, err = -EINVAL;
|
||
|
|
||
|
offset = command-1;
|
||
|
if (offset >= sizeof(sysinfo_table)/sizeof(char *)) {
|
||
|
/* Digital UNIX has a few unpublished interfaces here */
|
||
|
printk("sysinfo(%d)", command);
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
down_read(&uts_sem);
|
||
|
res = sysinfo_table[offset];
|
||
|
len = strlen(res)+1;
|
||
|
if (len > count)
|
||
|
len = count;
|
||
|
if (copy_to_user(buf, res, len))
|
||
|
err = -EFAULT;
|
||
|
else
|
||
|
err = 0;
|
||
|
up_read(&uts_sem);
|
||
|
out:
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
asmlinkage unsigned long
|
||
|
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()->flags >> UAC_SHIFT) & 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;
|
||
|
}
|
||
|
|
||
|
asmlinkage unsigned long
|
||
|
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 spurrious 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 softare 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 softare 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) {
|
||
|
siginfo_t info;
|
||
|
int si_code = 0;
|
||
|
|
||
|
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;
|
||
|
|
||
|
info.si_signo = SIGFPE;
|
||
|
info.si_errno = 0;
|
||
|
info.si_code = si_code;
|
||
|
info.si_addr = NULL; /* FIXME */
|
||
|
send_sig_info(SIGFPE, &info, 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 long v, w, i;
|
||
|
unsigned int old, new;
|
||
|
|
||
|
for (i = 0; i < nbytes; ++i) {
|
||
|
|
||
|
if (get_user(v, 2*i + (unsigned int __user *)buffer))
|
||
|
return -EFAULT;
|
||
|
if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
|
||
|
return -EFAULT;
|
||
|
switch (v) {
|
||
|
case SSIN_UACPROC:
|
||
|
again:
|
||
|
old = current_thread_info()->flags;
|
||
|
new = old & ~(UAC_BITMASK << UAC_SHIFT);
|
||
|
new = new | (w & UAC_BITMASK) << UAC_SHIFT;
|
||
|
if (cmpxchg(¤t_thread_info()->flags,
|
||
|
old, new) != old)
|
||
|
goto again;
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
return -EOPNOTSUPP;
|
||
|
}
|
||
|
}
|
||
|
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;
|
||
|
extern int do_adjtimex(struct timex *);
|
||
|
|
||
|
struct timeval32
|
||
|
{
|
||
|
int tv_sec, tv_usec;
|
||
|
};
|
||
|
|
||
|
struct itimerval32
|
||
|
{
|
||
|
struct timeval32 it_interval;
|
||
|
struct timeval32 it_value;
|
||
|
};
|
||
|
|
||
|
static inline long
|
||
|
get_tv32(struct timeval *o, struct timeval32 __user *i)
|
||
|
{
|
||
|
return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
|
||
|
(__get_user(o->tv_sec, &i->tv_sec) |
|
||
|
__get_user(o->tv_usec, &i->tv_usec)));
|
||
|
}
|
||
|
|
||
|
static inline long
|
||
|
put_tv32(struct timeval32 __user *o, struct timeval *i)
|
||
|
{
|
||
|
return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
|
||
|
(__put_user(i->tv_sec, &o->tv_sec) |
|
||
|
__put_user(i->tv_usec, &o->tv_usec)));
|
||
|
}
|
||
|
|
||
|
static inline long
|
||
|
get_it32(struct itimerval *o, struct itimerval32 __user *i)
|
||
|
{
|
||
|
return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
|
||
|
(__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
|
||
|
__get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
|
||
|
__get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
|
||
|
__get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
|
||
|
}
|
||
|
|
||
|
static inline long
|
||
|
put_it32(struct itimerval32 __user *o, struct itimerval *i)
|
||
|
{
|
||
|
return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
|
||
|
(__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
|
||
|
__put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
|
||
|
__put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
|
||
|
__put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
|
||
|
}
|
||
|
|
||
|
static inline void
|
||
|
jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
|
||
|
{
|
||
|
value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
|
||
|
value->tv_sec = jiffies / HZ;
|
||
|
}
|
||
|
|
||
|
asmlinkage int
|
||
|
osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
|
||
|
{
|
||
|
if (tv) {
|
||
|
struct timeval ktv;
|
||
|
do_gettimeofday(&ktv);
|
||
|
if (put_tv32(tv, &ktv))
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
if (tz) {
|
||
|
if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
asmlinkage int
|
||
|
osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
|
||
|
{
|
||
|
struct timespec kts;
|
||
|
struct timezone ktz;
|
||
|
|
||
|
if (tv) {
|
||
|
if (get_tv32((struct timeval *)&kts, tv))
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
if (tz) {
|
||
|
if (copy_from_user(&ktz, tz, sizeof(*tz)))
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
|
||
|
kts.tv_nsec *= 1000;
|
||
|
|
||
|
return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
|
||
|
}
|
||
|
|
||
|
asmlinkage int
|
||
|
osf_getitimer(int which, struct itimerval32 __user *it)
|
||
|
{
|
||
|
struct itimerval kit;
|
||
|
int error;
|
||
|
|
||
|
error = do_getitimer(which, &kit);
|
||
|
if (!error && put_it32(it, &kit))
|
||
|
error = -EFAULT;
|
||
|
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
asmlinkage int
|
||
|
osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out)
|
||
|
{
|
||
|
struct itimerval kin, kout;
|
||
|
int error;
|
||
|
|
||
|
if (in) {
|
||
|
if (get_it32(&kin, in))
|
||
|
return -EFAULT;
|
||
|
} else
|
||
|
memset(&kin, 0, sizeof(kin));
|
||
|
|
||
|
error = do_setitimer(which, &kin, out ? &kout : NULL);
|
||
|
if (error || !out)
|
||
|
return error;
|
||
|
|
||
|
if (put_it32(out, &kout))
|
||
|
return -EFAULT;
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
}
|
||
|
|
||
|
asmlinkage int
|
||
|
osf_utimes(char __user *filename, struct timeval32 __user *tvs)
|
||
|
{
|
||
|
struct timeval ktvs[2];
|
||
|
|
||
|
if (tvs) {
|
||
|
if (get_tv32(&ktvs[0], &tvs[0]) ||
|
||
|
get_tv32(&ktvs[1], &tvs[1]))
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
|
||
|
return do_utimes(filename, tvs ? ktvs : NULL);
|
||
|
}
|
||
|
|
||
|
#define MAX_SELECT_SECONDS \
|
||
|
((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
|
||
|
|
||
|
asmlinkage int
|
||
|
osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
|
||
|
struct timeval32 __user *tvp)
|
||
|
{
|
||
|
fd_set_bits fds;
|
||
|
char *bits;
|
||
|
size_t size;
|
||
|
long timeout;
|
||
|
int ret = -EINVAL;
|
||
|
|
||
|
timeout = MAX_SCHEDULE_TIMEOUT;
|
||
|
if (tvp) {
|
||
|
time_t sec, usec;
|
||
|
|
||
|
if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
|
||
|
|| __get_user(sec, &tvp->tv_sec)
|
||
|
|| __get_user(usec, &tvp->tv_usec)) {
|
||
|
ret = -EFAULT;
|
||
|
goto out_nofds;
|
||
|
}
|
||
|
|
||
|
if (sec < 0 || usec < 0)
|
||
|
goto out_nofds;
|
||
|
|
||
|
if ((unsigned long) sec < MAX_SELECT_SECONDS) {
|
||
|
timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
|
||
|
timeout += sec * (unsigned long) HZ;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (n < 0 || n > current->files->max_fdset)
|
||
|
goto out_nofds;
|
||
|
|
||
|
/*
|
||
|
* We need 6 bitmaps (in/out/ex for both incoming and outgoing),
|
||
|
* since we used fdset we need to allocate memory in units of
|
||
|
* long-words.
|
||
|
*/
|
||
|
ret = -ENOMEM;
|
||
|
size = FDS_BYTES(n);
|
||
|
bits = kmalloc(6 * size, GFP_KERNEL);
|
||
|
if (!bits)
|
||
|
goto out_nofds;
|
||
|
fds.in = (unsigned long *) bits;
|
||
|
fds.out = (unsigned long *) (bits + size);
|
||
|
fds.ex = (unsigned long *) (bits + 2*size);
|
||
|
fds.res_in = (unsigned long *) (bits + 3*size);
|
||
|
fds.res_out = (unsigned long *) (bits + 4*size);
|
||
|
fds.res_ex = (unsigned long *) (bits + 5*size);
|
||
|
|
||
|
if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) ||
|
||
|
(ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
|
||
|
(ret = get_fd_set(n, exp->fds_bits, fds.ex)))
|
||
|
goto out;
|
||
|
zero_fd_set(n, fds.res_in);
|
||
|
zero_fd_set(n, fds.res_out);
|
||
|
zero_fd_set(n, fds.res_ex);
|
||
|
|
||
|
ret = do_select(n, &fds, &timeout);
|
||
|
|
||
|
/* OSF does not copy back the remaining time. */
|
||
|
|
||
|
if (ret < 0)
|
||
|
goto out;
|
||
|
if (!ret) {
|
||
|
ret = -ERESTARTNOHAND;
|
||
|
if (signal_pending(current))
|
||
|
goto out;
|
||
|
ret = 0;
|
||
|
}
|
||
|
|
||
|
if (set_fd_set(n, inp->fds_bits, fds.res_in) ||
|
||
|
set_fd_set(n, outp->fds_bits, fds.res_out) ||
|
||
|
set_fd_set(n, exp->fds_bits, fds.res_ex))
|
||
|
ret = -EFAULT;
|
||
|
|
||
|
out:
|
||
|
kfree(bits);
|
||
|
out_nofds:
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
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 " */
|
||
|
};
|
||
|
|
||
|
asmlinkage int
|
||
|
osf_getrusage(int who, struct rusage32 __user *ru)
|
||
|
{
|
||
|
struct rusage32 r;
|
||
|
|
||
|
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
|
||
|
return -EINVAL;
|
||
|
|
||
|
memset(&r, 0, sizeof(r));
|
||
|
switch (who) {
|
||
|
case RUSAGE_SELF:
|
||
|
jiffies_to_timeval32(current->utime, &r.ru_utime);
|
||
|
jiffies_to_timeval32(current->stime, &r.ru_stime);
|
||
|
r.ru_minflt = current->min_flt;
|
||
|
r.ru_majflt = current->maj_flt;
|
||
|
break;
|
||
|
case RUSAGE_CHILDREN:
|
||
|
jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
|
||
|
jiffies_to_timeval32(current->signal->cstime, &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;
|
||
|
}
|
||
|
|
||
|
asmlinkage long
|
||
|
osf_wait4(pid_t pid, int __user *ustatus, int options,
|
||
|
struct rusage32 __user *ur)
|
||
|
{
|
||
|
struct rusage r;
|
||
|
long ret, err;
|
||
|
mm_segment_t old_fs;
|
||
|
|
||
|
if (!ur)
|
||
|
return sys_wait4(pid, ustatus, options, NULL);
|
||
|
|
||
|
old_fs = get_fs();
|
||
|
|
||
|
set_fs (KERNEL_DS);
|
||
|
ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
|
||
|
set_fs (old_fs);
|
||
|
|
||
|
if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
|
||
|
return -EFAULT;
|
||
|
|
||
|
err = 0;
|
||
|
err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
|
||
|
err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
|
||
|
err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
|
||
|
err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
|
||
|
err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
|
||
|
err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
|
||
|
err |= __put_user(r.ru_idrss, &ur->ru_idrss);
|
||
|
err |= __put_user(r.ru_isrss, &ur->ru_isrss);
|
||
|
err |= __put_user(r.ru_minflt, &ur->ru_minflt);
|
||
|
err |= __put_user(r.ru_majflt, &ur->ru_majflt);
|
||
|
err |= __put_user(r.ru_nswap, &ur->ru_nswap);
|
||
|
err |= __put_user(r.ru_inblock, &ur->ru_inblock);
|
||
|
err |= __put_user(r.ru_oublock, &ur->ru_oublock);
|
||
|
err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
|
||
|
err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
|
||
|
err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
|
||
|
err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
|
||
|
err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
|
||
|
|
||
|
return err ? err : ret;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* 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.
|
||
|
*/
|
||
|
asmlinkage int
|
||
|
osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain)
|
||
|
{
|
||
|
struct timeval tmp;
|
||
|
unsigned long ticks;
|
||
|
|
||
|
if (get_tv32(&tmp, sleep))
|
||
|
goto fault;
|
||
|
|
||
|
ticks = tmp.tv_usec;
|
||
|
ticks = (ticks + (1000000 / HZ) - 1) / (1000000 / HZ);
|
||
|
ticks += tmp.tv_sec * HZ;
|
||
|
|
||
|
current->state = TASK_INTERRUPTIBLE;
|
||
|
ticks = schedule_timeout(ticks);
|
||
|
|
||
|
if (remain) {
|
||
|
tmp.tv_sec = ticks / HZ;
|
||
|
tmp.tv_usec = ticks % HZ;
|
||
|
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;
|
||
|
};
|
||
|
|
||
|
asmlinkage int
|
||
|
sys_old_adjtimex(struct timex32 __user *txc_p)
|
||
|
{
|
||
|
struct 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, time)))
|
||
|
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_tv32(&txc_p->time, &txc.time)))
|
||
|
return -EFAULT;
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
/* Get an address range which is currently unmapped. Similar to the
|
||
|
generic version except that we know how to honor ADDR_LIMIT_32BIT. */
|
||
|
|
||
|
static unsigned long
|
||
|
arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
|
||
|
unsigned long limit)
|
||
|
{
|
||
|
struct vm_area_struct *vma = find_vma(current->mm, addr);
|
||
|
|
||
|
while (1) {
|
||
|
/* At this point: (!vma || addr < vma->vm_end). */
|
||
|
if (limit - len < addr)
|
||
|
return -ENOMEM;
|
||
|
if (!vma || addr + len <= vma->vm_start)
|
||
|
return addr;
|
||
|
addr = vma->vm_end;
|
||
|
vma = vma->vm_next;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
unsigned long
|
||
|
arch_get_unmapped_area(struct file *filp, unsigned long addr,
|
||
|
unsigned long len, unsigned long pgoff,
|
||
|
unsigned long flags)
|
||
|
{
|
||
|
unsigned long limit;
|
||
|
|
||
|
/* "32 bit" actually means 31 bit, since pointers sign extend. */
|
||
|
if (current->personality & ADDR_LIMIT_32BIT)
|
||
|
limit = 0x80000000;
|
||
|
else
|
||
|
limit = TASK_SIZE;
|
||
|
|
||
|
if (len > limit)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
/* 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;
|
||
|
}
|
||
|
|
||
|
#ifdef CONFIG_OSF4_COMPAT
|
||
|
|
||
|
/* Clear top 32 bits of iov_len in the user's buffer for
|
||
|
compatibility with old versions of OSF/1 where iov_len
|
||
|
was defined as int. */
|
||
|
static int
|
||
|
osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
|
||
|
{
|
||
|
unsigned long i;
|
||
|
|
||
|
for (i = 0 ; i < count ; i++) {
|
||
|
int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
|
||
|
|
||
|
if (put_user(0, iov_len_high))
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
asmlinkage ssize_t
|
||
|
osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count)
|
||
|
{
|
||
|
if (unlikely(personality(current->personality) == PER_OSF4))
|
||
|
if (osf_fix_iov_len(vector, count))
|
||
|
return -EFAULT;
|
||
|
return sys_readv(fd, vector, count);
|
||
|
}
|
||
|
|
||
|
asmlinkage ssize_t
|
||
|
osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count)
|
||
|
{
|
||
|
if (unlikely(personality(current->personality) == PER_OSF4))
|
||
|
if (osf_fix_iov_len(vector, count))
|
||
|
return -EFAULT;
|
||
|
return sys_writev(fd, vector, count);
|
||
|
}
|
||
|
|
||
|
#endif
|