vmm: display segment map info

1 files changed, 49 insertions, 0 deletions

diff --git a/src/vmm.cc b/src/vmm.cc
new file mode 100644
index 0000000..346e6ab
--- /dev/null
+++ b/src/vmm.cc
@@ -0,0 +1,49 @@
+#include <stdlib.h>
+
+typedef void (*constructor)();
+
+extern "C" {
+/* .text */
+uint32_t begin_text;
+uint32_t end_text;
+
+/* .rodata */
+uint32_t begin_rodata;
+uint32_t end_rodata;
+
+/* .data */
+uint32_t begin_constinit;
+uint32_t end_constinit;
+constructor begin_ctors;
+constructor end_ctors;
+uint32_t begin_data;
+uint32_t end_data;
+
+/* .bss */
+uint32_t begin_bss;
+uint32_t end_bss;
+
+void kernel_constructors() {
+  for (constructor* i = &begin_ctors; i != &end_ctors; ++i) (*i)();
+}
+
+void dump_address() {
+  printk("text      begin: ", uhex{reinterpret_cast<uint32_t>(&begin_text)},
+         " end: ", uhex{reinterpret_cast<uint32_t>(&end_text)}, '\n');
+
+  printk("rodata    begin: ", uhex{reinterpret_cast<uint32_t>(&begin_rodata)},
+         " end: ", uhex{reinterpret_cast<uint32_t>(&end_rodata)}, '\n');
+
+  printk("constinit begin: ", uhex{reinterpret_cast<uint32_t>(&begin_constinit)},
+         " end: ", uhex{reinterpret_cast<uint32_t>(&end_constinit)}, '\n');
+
+  printk("ctors     begin: ", uhex{reinterpret_cast<uint32_t>(&begin_ctors)},
+         " end: ", uhex{reinterpret_cast<uint32_t>(&end_ctors)}, '\n');
+
+  printk("data      begin: ", uhex{reinterpret_cast<uint32_t>(&begin_data)},
+         " end: ", uhex{reinterpret_cast<uint32_t>(&end_data)}, '\n');
+
+  printk("bss       begin: ", uhex{reinterpret_cast<uint32_t>(&begin_bss)},
+         " end: ", uhex{reinterpret_cast<uint32_t>(&end_bss)}, '\n');
+}
+}  // extern "C"