Added automated footprint regression tests

.github/workflows/footprint.yml

@@ -0,0 +1,44 @@
+name: Footprint test
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  build_and_test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      # Get the arm-non-eabi-gcc toolchain
+      - name: Install arm-none-eabi-gcc
+        uses: fiam/arm-none-eabi-gcc@v1
+        with:
+          # The arm-none-eabi-gcc release to use.
+          release: "9-2019-q4"
+
+      - name: make clean
+        run: |
+          make clean && make -C tools/keytools clean && rm -f include/target.h
+
+      - name: Install wolfSSL
+        run: |
+          sudo apt-get install --no-install-recommends -y -q make libwolfssl-dev
+
+      - name: Select config
+        run: |
+          cp config/examples/stm32f4.config .config && make include/target.h
+
+      - name: Build key tools
+        run: |
+          make -C tools/keytools
+
+      - name: Build wolfboot and test footprint
+        run: |
+          make test-size-all
+

tools/test.mk

@@ -66,6 +66,11 @@ $(EXPVER):
 $(BINASSEMBLE):
 	$(MAKE) -C $(dir $@)
 
+test-size: FORCE
+	$(Q)make clean
+	$(Q)make wolfboot.bin
+	$(Q)FP=`$(SIZE) -A wolfboot.elf | awk -e ' /Total/ {print $$2;}'`; echo SIZE: $$FP LIMIT: $$LIMIT; test $$FP -le $$LIMIT
+
 # Testbed actions
 #
 #
@@ -759,3 +764,15 @@ test-all: clean
 	make test-no-asm-smallstack
 	make test-fastmath-smallstack
 	make test-delta-update
+
+test-size-all:
+	make test-size SIGN=ED25519 LIMIT=10670
+	make test-size SIGN=ECC256  LIMIT=21538
+	make test-size SIGN=ECC256 NO_ASM=1 LIMIT=13042
+	make test-size SIGN=RSA2048 LIMIT=10538
+	make test-size SIGN=RSA2048 NO_ASM=1 LIMIT=11626
+	make test-size SIGN=RSA4096 LIMIT=10894
+	make test-size SIGN=RSA4096 NO_ASM=1 LIMIT=11910
+	make test-size SIGN=ECC384 LIMIT=16866
+	make test-size SIGN=ECC384 NO_ASM=1 LIMIT=14294
+	make test-size SIGN=ED448 LIMIT=12830