From 9383ced7fb57ebabb2ca509ca64a4ca49bca5875 Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.net>
Date: Thu, 5 Oct 2017 13:05:22 +0200
Subject: Add source-in-firmware trick

---
 olsndot/firmware/Makefile       | 13 ++++++++++++-
 olsndot/firmware/stm32_flash.ld |  3 +++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/olsndot/firmware/Makefile b/olsndot/firmware/Makefile
index 33c1139..ce1d221 100644
--- a/olsndot/firmware/Makefile
+++ b/olsndot/firmware/Makefile
@@ -31,7 +31,17 @@ all: main.elf
 cmsis_exports.c: $(CMSIS_DEV_PATH)/Include/stm32f030x6.h $(CMSIS_PATH)/Include/core_cm0.h
 	python3 gen_cmsis_exports.py $^ > $@
 
-main.elf: main.c startup_stm32f030x6.s system_stm32f0xx.c $(HAL_PATH)/Src/stm32f0xx_ll_utils.c cmsis_exports.c
+sources.tar.xz: main.c Makefile
+	tar -caf $@ $^
+
+# don't ask...
+sources.tar.xz.zip: sources.tar.xz
+	zip $@ $^
+
+sources.c: sources.tar.xz.zip
+	xxd -i $< | head -n -1 | sed 's/=/__attribute__((section(".source_tarball"))) =/' > $@
+
+main.elf: main.c startup_stm32f030x6.s system_stm32f0xx.c $(HAL_PATH)/Src/stm32f0xx_ll_utils.c cmsis_exports.c sources.o
 	$(CC) $(CFLAGS) -o $@ $^
 	$(OBJCOPY) -O ihex $@ $(@:.elf=.hex)
 	$(OBJCOPY) -O binary $@ $(@:.elf=.bin)
@@ -44,4 +54,5 @@ program: main.elf openocd.cfg
 clean:
 	rm -f *.o
 	rm -f main.elf main.hex main.bin main.map main.lst
+	rm -f sources.tar.xz sources.tar.xz.zip
 
diff --git a/olsndot/firmware/stm32_flash.ld b/olsndot/firmware/stm32_flash.ld
index 927e8b4..4a7f88a 100644
--- a/olsndot/firmware/stm32_flash.ld
+++ b/olsndot/firmware/stm32_flash.ld
@@ -28,9 +28,12 @@ SECTIONS {
         *(.glue_7)                 /* TBD - needed ? */
         *(.glue_7t)                /* TBD - needed ? */
 
+        *(.source_tarball)
+
         /* Necessary KEEP sections (see http://sourceware.org/ml/newlib/2005/msg00255.html) */
         KEEP (*(.init))
         KEEP (*(.fini))
+        KEEP (*(.source_tarball))
 	
 	    . = ALIGN(4);
         _etext = .;
-- 
cgit