vmbase_example: Clarify that the payload is a BIOS
Rename all Soong targets to include "_bios" and refactor the linker
script and idmap.S to be preprocessed and receive a CPP macro
representing the "mode". Rename image.ld to reflect this.
Modify the test to use the new "_bios" binary name and refactor it to
make the core logic re-usable for future vmbase_example modes.
No functional change intended.
Test: atest vmbase_example.integration_test
Change-Id: I06679d154494d85916ff534298a066519b1b0778
diff --git a/guest/vmbase_example/image.ld.S b/guest/vmbase_example/image.ld.S
new file mode 100644
index 0000000..3bfab9c
--- /dev/null
+++ b/guest/vmbase_example/image.ld.S
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+MEMORY
+{
+#if defined(VMBASE_EXAMPLE_IS_BIOS)
+ image : ORIGIN = 0x80200000, LENGTH = 2M
+ writable_data : ORIGIN = 0x80400000, LENGTH = 2M
+#else
+#error "Unexpected vmbase_example mode: failed to generate image layout"
+#endif
+}