fixes from Peter Froehlich

c5f53873 · Russ Cox · a6cd7509 · c5f53873 · c5f53873 · c5f53873
--- a/console.c
+++ b/console.c
@@ -23,24 +23,24 @@ static struct {
 } cons;
 static void
-printint(int xx, int base, int sgn)
+printint(int xx, int base, int sign)
 {
  static char digits[] = "0123456789abcdef";
  char buf[16];
-  int i, neg;
+  int i;
  uint x;
-  if(sgn && (neg = xx < 0)){
+  if(sign && (sign = xx < 0))
-    neg = 1;
    x = -xx;
-  } else
+  else
    x = xx;
  i = 0;
  do{
    buf[i++] = digits[x % base];
  }while((x /= base) != 0);
-  if(neg)
+  if(sign)
    buf[i++] = '-';
  while(--i >= 0)

--- a/mkfs.c
+++ b/mkfs.c
@@ -229,7 +229,7 @@ balloc(int used)
  int i;
  printf("balloc: first %d blocks have been allocated\n", used);
-  assert(used < 512);
+  assert(used < 512*8);
  bzero(buf, 512);
  for(i = 0; i < used; i++){
    buf[i/8] = buf[i/8] | (0x1 << (i%8));

--- a/syscall.c
+++ b/syscall.c
@@ -57,7 +57,7 @@ argptr(int n, char **pp, int size)
  if(argint(n, &i) < 0)
    return -1;
-  if((uint)i >= proc->sz || (uint)i+size >= proc->sz)
+  if((uint)i >= proc->sz || (uint)i+size > proc->sz)
    return -1;
  *pp = (char*)i;
  return 0;