From f95a4a932476be2ba99e2fd081e8d2bc6ea12813 Mon Sep 17 00:00:00 2001
From: PikalaxALT <pikalaxalt@gmail.com>
Date: Fri, 15 Dec 2017 09:38:53 -0500
Subject: Import newlib and create makefile

---
 newlib/libc/sys/sysmec/sbrk.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 newlib/libc/sys/sysmec/sbrk.c

(limited to 'newlib/libc/sys/sysmec/sbrk.c')

diff --git a/newlib/libc/sys/sysmec/sbrk.c b/newlib/libc/sys/sysmec/sbrk.c
new file mode 100644
index 0000000..80cb431
--- /dev/null
+++ b/newlib/libc/sys/sysmec/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 ();
+
+#define TRAP0(f, p1, p2, p3) __trap0(f, (p1), (p2), (p3))
+
+caddr_t
+_sbrk (size_t 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;
+}
-- 
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