[Usr] Add a test process to spawn from Teton.

.gitignore

@@ -3,3 +3,4 @@ __pycache__/
 compile_commands.json
 
 sysroot/bin
+sysroot/usr/bin

CMakeLists.txt

@@ -15,4 +15,5 @@ set(BASE_LINK_FLAGS "-nostdlib")
 add_subdirectory(zion)
 add_subdirectory(lib)
 add_subdirectory(yunq)
+add_subdirectory(usr)
 add_subdirectory(sys)

sys/teton/terminal.cpp

@@ -3,6 +3,8 @@
 #include <glacier/string/str_format.h>
 #include <glacier/string/str_split.h>
 #include <mammoth/file/file.h>
+#include <mammoth/proc/process.h>
+#include <zglobal.h>
 
 void Terminal::HandleCharacter(char c) {
   console_.WriteChar(c);
@@ -58,6 +60,16 @@ void Terminal::ExecuteCommand(const glcr::String& command) {
         console_.WriteChar('\n');
       }
     }
+  } else if (cmd == "exec") {
+    if (tokens.size() != 2) {
+      console_.WriteString("Provide the name of an executable.\n>");
+      return;
+    }
+    auto file = mmth::File::Open(tokens[1]);
+
+    // TODO: Wait until the process exits.
+    mmth::SpawnProcessFromElfRegion((uint64_t)file.raw_ptr(), gInitEndpointCap);
+
   } else {
     console_.WriteString("Unknown command: ");
     console_.WriteString(command);

usr/CMakeLists.txt

@@ -0,0 +1,2 @@
+
+add_subdirectory(testbed)

usr/testbed/CMakeLists.txt

@@ -0,0 +1,21 @@
+
+add_executable(testbed
+  test.cpp
+  )
+
+target_include_directories(testbed
+   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+
+target_link_libraries(testbed
+  mammoth
+)
+
+set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
+
+set_target_properties(testbed PROPERTIES
+  COMPILE_FLAGS "${CMAKE_CXX_FLAGS} ${BASE_COMPILE_FLAGS}"
+  LINK_FLAGS "${CMAKE_EXE_LINK_FLAGS} ${BASE_LINK_FLAGS}"
+)
+
+install(TARGETS testbed DESTINATION usr/bin)
+

usr/testbed/test.cpp

@@ -0,0 +1,7 @@
+#include <mammoth/util/debug.h>
+
+uint64_t main(uint64_t init_port_cap) {
+  dbgln("testbed");
+
+  return glcr::OK;
+}