Changeset 152 for sbliveos2/trunk/lib32/memory.cpp

Timestamp:

Jul 17, 2000, 8:37:33 PM (25 years ago)

Author:

sandervl

Message:

misc updates

File:

• sbliveos2/trunk/lib32/memory.cpp (modified) (7 diffs)

sbliveos2/trunk/lib32/memory.cpp

@@ -129 +129 @@
 void __copy_user(void *to, const void *from, unsigned long n)
 {
+        if(to == NULL || from == NULL) {
+                DebugInt3();
+                return;
+        }
+        if(n == 0) return;
 #ifdef KEE
         memcpy(to, from, n);
@@ -139 +144 @@
 unsigned long copy_to_user(void *to, const void *from, unsigned long n)
 {
+        if(to == NULL || from == NULL) {
+                DebugInt3();
+                return 0;
+        }
+        if(n == 0) return 0;
 #ifdef KEE
         memcpy(to, from, n);
@@ -150 +160 @@
 void __copy_user_zeroing(void *to, const void *from, unsigned long n)
 {
+        if(to == NULL || from == NULL) {
+                DebugInt3();
+                return;
+        }
+        if(n == 0) return;
         copy_to_user(to, from, n);
 }
@@ -156 +171 @@
 unsigned long copy_from_user(void *to, const void *from, unsigned long n)
 {
+        if(to == NULL || from == NULL) {
+                DebugInt3();
+                return 0;
+        }
+        if(n == 0) return 0;
 #ifdef KEE
         memcpy(to, from, n);
@@ -167 +187 @@
 int get_user(int size, void *dest, void *src)
 {
+        if(size == 0)   return 0;
+
+        if(dest == NULL || src == NULL) {
+                DebugInt3();
+                return 0;
+        }
 #ifdef KEE
         memcpy(dest, src, size);
@@ -178 +204 @@
 int put_user(int x, void *ptr)
 {
+        if(ptr == NULL) {
+                DebugInt3();
+                return 0;
+        }
+
         *(int *)ptr = x;
         return 0;
@@ -200 +231 @@
  char near *addr;
 
+  if(size == 0) {
+        DebugInt3();
+        return NULL;
+  }
   if(size > 1024) {
 #ifdef KEE