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Changed to actually work. (On modern Linux systems the old version just
crashes. On old Linux systems it apparently only worked by accident.)

dtrg преди 13 години
родител
ревизия
5e831ec966
променени са 1 файла, в които са добавени 9 реда и са изтрити 5 реда
  1. 9 5
      plat/linux386/libsys/sbrk.c

+ 9 - 5
plat/linux386/libsys/sbrk.c

@@ -9,23 +9,27 @@
 
 #define	OUT_OF_MEMORY (void*)(-1)	/* sbrk returns this on failure */
 
-extern char _end[1];
-
-static char* current = _end;
+static char* current = NULL;
  
 void* sbrk(intptr_t increment)
 {
 	char* old;
 	char* new;
+	char* actual;
 	
+	if (!current)
+		current = (char*) _syscall(__NR_brk, 0, 0, 0);
+
 	if (increment == 0)
 		return current;
 		
 	old = current;
 	new = old + increment;
-	if (brk(new) < 0)
+
+	actual = (char*) _syscall(__NR_brk, (quad) new, 0, 0);
+	if (actual < new)
 		return OUT_OF_MEMORY;
 		
-	current = new;
+	current = actual;
 	return old;
 }