h8300 updates from Yoshinori Sato

1 files changed, 33 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/h8300/brk.c b/libc/sysdeps/linux/h8300/brk.c
new file mode 100644
index 000000000..71de9501f
--- /dev/null
+++ b/libc/sysdeps/linux/h8300/brk.c
@@ -0,0 +1,33 @@
+/* brk on H8/300 by ysato */
+
+#include <errno.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+
+/* This must be initialized data because commons can't have aliases.  */
+void *___brk_addr = 0;
+
+
+int brk (void *addr)
+{
+    void *newbrk;
+
+    asm ("mov.l %2,er1\n\t"
+	 "mov.l %1,er0\n\t"
+	 "trapa #0\n\t"
+	 "mov.l er0,%0"
+	 : "=r" (newbrk)
+	 : "0" (__NR_brk), "g" (addr)
+	 : "er0","er1");
+
+    ___brk_addr = newbrk;
+
+    if (newbrk < addr)
+    {
+	__set_errno (ENOMEM);
+	return -1;
+    }
+
+    return 0;
+}