firmware: do not allow undefined symbols

For some reason undefined symbols were downgraded to warnings, which
means building a firmware that calls missing functions  (= address zero)
was perfectly fine, which of course made development more exciting....

This applies to builtins, too, printf of one char gets downgraded to
putchar, which we don't have, so disable builtins.

Change-Id: I492f41ad4162b9d07b1881ae4aed019db2dff8b5

3 files changed, 9 insertions, 4 deletions

diff --git a/firmware/Makefile b/firmware/Makefile
index bdca6e5..373cfdf 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -100,7 +100,7 @@ C_LIBUSB     = USBDescriptors.c USBRequests.c USBD.c USBDCallbacks.c USBDDriver.
 C_LIBUSB_RT  = dfu.c dfu_runtime.c
 C_LIBUSB_DFU = dfu.c dfu_desc.c dfu_driver.c
 C_LIBCOMMON  = string.c stdio.c fputs.c usb_buf.c ringbuffer.c pseudo_talloc.c host_communication.c \
-	       main_common.c
+	       main_common.c tc_etu.c
 
 C_BOARD      = $(notdir $(wildcard libboard/common/source/*.c))
 C_BOARD     += $(notdir $(wildcard libboard/$(BOARD)/source/*.c))
@@ -164,14 +164,14 @@ CFLAGS += -Wno-suggest-attribute=noreturn
 # -mlong-calls  -Wall
 #CFLAGS += -save-temps -fverbose-asm
 #CFLAGS += -Wa,-a,-ad
-CFLAGS += -D__ARM
+CFLAGS += -D__ARM -fno-builtin
 CFLAGS += --param max-inline-insns-single=500 -mcpu=cortex-m3 -mthumb # -mfix-cortex-m3-ldrd
 CFLAGS += -ffunction-sections -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -DTRACE_LEVEL=$(TRACE_LEVEL) -DALLOW_PEER_ERASE=$(ALLOW_PEER_ERASE)
 CFLAGS += -DGIT_VERSION=\"$(GIT_VERSION)\"
 CFLAGS += -DBOARD=\"$(BOARD)\" -DBOARD_$(BOARD)
 CFLAGS += -DAPPLICATION=\"$(APP)\" -DAPPLICATION_$(APP)
 ASFLAGS = -mcpu=cortex-m3 -mthumb -Wall -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -D__ASSEMBLY__
-LDFLAGS = -mcpu=cortex-m3 -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=ResetException -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--warn-unresolved-symbols -Wl,--print-memory-usage $(LIB)
+LDFLAGS = -mcpu=cortex-m3 -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=ResetException -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--print-memory-usage -Wl,--no-undefined $(LIB)
 #LD_OPTIONAL=-Wl,--print-gc-sections -Wl,--stats
 
 # Append BIN directories to output filename
diff --git a/firmware/apps/cardem/Makefile b/firmware/apps/cardem/Makefile
index 404e0ca..fd2331d 100644
--- a/firmware/apps/cardem/Makefile
+++ b/firmware/apps/cardem/Makefile
@@ -1,3 +1,3 @@
 C_FILES += $(C_LIBUSB_RT)
 
-C_FILES += card_emu.c iso7816_3.c iso7816_4.c mode_cardemu.c simtrace_iso7816.c usb.c
+C_FILES += card_emu.c iso7816_fidi.c iso7816_3.c iso7816_4.c mode_cardemu.c simtrace_iso7816.c usb.c
diff --git a/firmware/libboard/common/source/board_lowlevel.c b/firmware/libboard/common/source/board_lowlevel.c
index b4d7d32..1ddbcba 100644
--- a/firmware/libboard/common/source/board_lowlevel.c
+++ b/firmware/libboard/common/source/board_lowlevel.c
@@ -218,3 +218,8 @@ void mdelay(unsigned int msecs)
 	do {
 	} while ((jiffies - jiffies_start) < msecs);
 }
+
+void abort() {
+	NVIC_SystemReset();
+	while(1) {};
+}