import newlib-2000-02-17 snapshot

1 files changed, 36 insertions, 0 deletions

diff --git a/newlib/libc/sys/sysnecv850/sbrk.c b/newlib/libc/sys/sysnecv850/sbrk.c
new file mode 100644
index 000000000..b41370595
--- /dev/null
+++ b/newlib/libc/sys/sysnecv850/sbrk.c
@@ -0,0 +1,36 @@
+#include <_ansi.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "sys/syscall.h"
+
+int errno;
+
+int __trap0 (int function, int p1, int p2, int p3);
+
+#define TRAP0(f, p1, p2, p3) __trap0(f, (int)(p1), (int)(p2), (int)(p3))
+
+caddr_t
+_sbrk (int incr)
+{
+  extern char end;		/* Defined by the linker */
+  static char *heap_end;
+  char *prev_heap_end;
+#if 0
+  char *sp = (char *)stack_ptr;
+#else
+  char *sp = (char *)&sp;
+#endif
+
+  if (heap_end == 0)
+    {
+      heap_end = &end;
+    }
+  prev_heap_end = heap_end;
+  if (heap_end + incr > sp)
+    {
+      _write (1, "Heap and stack collision\n", 25);
+      abort ();
+    }
+  heap_end += incr;
+  return (caddr_t) prev_heap_end;
+}