HEADmaster

1 files changed, 50 insertions, 0 deletions

diff --git a/misc-host/test-vaddr/vaddr.cpp b/misc-host/test-vaddr/vaddr.cpp
new file mode 100644
index 0000000..c5af491
--- /dev/null
+++ b/misc-host/test-vaddr/vaddr.cpp
@@ -0,0 +1,50 @@
+#include <iostream>
+#include <cstdio>
+#include <cstdint>
+
+typedef struct __attribute__((packed))
+{
+  unsigned long page:21;
+  unsigned long PD:9;
+  unsigned long PDP:9;
+  unsigned long PML4:9;
+  unsigned long sign:16;
+} s_vptr;
+
+union v
+{
+s_vptr vptr;
+unsigned long ptr;
+};
+
+int main()
+{
+  // 0x0FFFFFFFF; below 4GB
+  //unsigned long vaddr = 0x40000000; // 1GB // 0x100000000; // 4GB
+
+  unsigned long vaddr = 0x280000000; // 10GB
+  
+  uint64_t kr = 0xffffffff7fffffff; // -2GB mark
+
+  //v * p = (v*)&vaddr;
+  v * p = (v*)&kr;
+
+  std::cout << "sign " << p->vptr.sign << std::endl;
+  std::cout << "PML4 " << p->vptr.PML4 << std::endl;
+  std::cout << "PDP " << p->vptr.PDP << std::endl;
+  std::cout << "PD " << p->vptr.PD << std::endl;
+  std::cout << "Page " << p->vptr.page << std::endl;  
+
+  
+  printf("%p\n", p->ptr);
+  //std::cout << "Pointer " << p->ptr << std::endl;
+  
+  v p2;
+  p2.ptr = 0;
+  p2.vptr.PML4 = 1;
+  
+  printf("p2: %p\n", p2.ptr);
+  
+  return 0;
+}
+