patch-2.1.48 linux/arch/ppc/kernel/usercpy.c

• Lines: 117
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.47/linux/arch/ppc/kernel/usercpy.c
• Orig date: Wed Dec 18 00:49:52 1996

diff -u --recursive --new-file v2.1.47/linux/arch/ppc/kernel/usercpy.c linux/arch/ppc/kernel/usercpy.c
@@ -1,116 +0,0 @@
-#include <linux/types.h>
-#include <asm/string.h>
-#include <asm/errno.h>
-#include <linux/sched.h>
-
-/*
- * bad data accesses from these functions should be handled specially 
- * since they are to user areas and may or may not be valid.
- * on error -EFAULT should be returned.  -- Cort
- */
-int __copy_tofrom_user_failure(void)
-{
-  current->tss.excount = 0;
-  return -EFAULT;
-}
-
-int __copy_tofrom_user(unsigned long to, unsigned long from, int size)
-{
-  /* setup exception handling stuff */
-  current->tss.excount++;
-  current->tss.expc = (unsigned long )__copy_tofrom_user_failure;
-  
-  if (memcpy( (void *)to, (void *)from, (size_t) size) == -EFAULT )
-  {
-    /* take down exception handler stuff */
-    current->tss.excount = 0;
-    return -EFAULT;
-  }
-  current->tss.excount = 0;
-  return 0; /* successful return */
-}
-
-/* Just like strncpy except in the return value:
- *
- * -EFAULT       if an exception occurs before the terminator is copied.
- * N             if the buffer filled.
- *
- * Otherwise the length of the string is returned.
- */
-asmlinkage int __strncpy_from_user_failure(void)
-{
-  current->tss.excount = 0;
-  return -EFAULT;
-}
-
-int __strncpy_from_user(unsigned long dest, unsigned long src, int count)
-{
-  int i = 0;
-  /* setup exception handling stuff */
-  current->tss.excount++;
-  current->tss.expc = (unsigned long )__strncpy_from_user_failure;
-  
-  while ( i != count )
-  {
-    *(char *)(dest+i) = *(char *)(src+i);
-    if ( *(char *)(src+i) == 0 )
-    {
-      return i;
-    }
-    i++;
-  }
-  *(char *)(dest+i) = (char)0;
-  /* take down exception handler stuff */
-  current->tss.excount = 0;
-  return i;
-}
-
-int __clear_user_failure(void)
-{
-  current->tss.excount = 0;
-  return -EFAULT;
-}
-int __clear_user(unsigned long addr, int size)
-{
-  /* setup exception handling stuff */
-  current->tss.excount++;
-  current->tss.expc = (unsigned long )__clear_user_failure;
-
-  if ((int)memset((void *)addr,(int)0, (__kernel_size_t)size) == -EFAULT )
-    {
-      /* take down exception handler stuff */
-      current->tss.excount = 0;
-      return -EFAULT;
-    }
-  /* take down exception handler stuff */
-  current->tss.excount = 0;
-  return size;
-}
-
-/*
- * Return the length of the string including the NUL terminator
- * (strlen+1) or zero if an error occured.
- */
-size_t strlen_user_failure(void)
-{
-  current->tss.excount = 0;
-  return -EFAULT;
-}
-size_t strlen_user(char * s)
-{
-  size_t i;
-  /* setup exception handling stuff */
-  current->tss.excount++;
-  current->tss.expc = (unsigned long )strlen_user_failure;
-  
-  i = strlen(s)+1;
-  
-  if ( i == -EFAULT)
-    return -EFAULT;
-  
-  /* take down exception handler stuff */
-  current->tss.excount = 0;
-
-  return(i);
-}
-