(2006-08-06) rescue-bootcd

extra/syslinux-3.09/sample/c32echo.c

@@ -0,0 +1,49 @@
+#ident "$Id: c32echo.c,v 1.3 2005/01/03 08:23:16 hpa Exp $"
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 2002 H. Peter Anvin - All Rights Reserved
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+ *   Boston MA 02111-1307, USA; either version 2 of the License, or
+ *   (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * c32echo.c
+ *
+ * Simple COM32 program which only prints out its own command line
+ */
+
+#include <com32.h>
+
+#define NULL ((void *)0)
+
+static inline void memset(void *buf, int ch, unsigned int len)
+{
+  asm volatile("cld; rep; stosb"
+	       : "+D" (buf), "+c" (len) : "a" (ch) : "memory");
+}
+
+int __start(void)
+{
+  com32sys_t inreg;
+  const char *p;
+
+  memset(&inreg, 0, sizeof inreg);
+  inreg.eax.b[1] = 0x02;	/* Write Character */
+
+  for ( p = __com32.cs_cmdline ; *p ; p++ ) {
+    inreg.edx.b[0] = *p;
+    __com32.cs_intcall(0x21, &inreg, NULL);
+  }
+
+  inreg.edx.b[0] = '\r';
+  __com32.cs_intcall(0x21, &inreg, NULL);
+  inreg.edx.b[0] = '\n';
+  __com32.cs_intcall(0x21, &inreg, NULL);
+
+  return 0;
+}