Add support for the Analog Devices Blackfin mmuless processor

1 files changed, 30 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/bfin/brk.c b/libc/sysdeps/linux/bfin/brk.c
new file mode 100644
index 000000000..178124ed3
--- /dev/null
+++ b/libc/sysdeps/linux/bfin/brk.c
@@ -0,0 +1,30 @@
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+/* This must be initialized data because commons can't have aliases.  */
+void * __curbrk = 0;
+
+int brk (void *addr)
+{
+    void *newbrk;
+
+	__asm__ __volatile__(
+		"P0 = %2;\n\t"
+		"R0 = %1;\n\t"
+		"excpt 0;\n\t"
+		"%0 = R0;\n\t"
+		: "=r"(newbrk)
+		: "r"(addr), "i" (__NR_brk): "P0" );
+
+    __curbrk = newbrk;
+
+    if (newbrk < addr)
+    {
+	__set_errno (ENOMEM);
+	return -1;
+    }
+
+    return 0;
+}