.PHONY: clean build upload 
.SILENT:
.NOTPARALLEL:

EXECUTABLES = clang gcc uuid rsync lld
DEPENDENCIES := $(foreach exec,$(EXECUTABLES), $(if $(shell which $(exec) 2> /dev/null),X,$(error "No '$(exec)' in PATH, please install it and restart octopus !")))


### Generic flags
PROG=		spectre
CFLAGS=		-march=native
CFLAGS+=	-W
CFLAGS+=	-Wall
CFLAGS+=	-Werror
CFLAGS+=	-Wno-unused-parameter
CFLAGS+=	-Wno-missing-field-initializers
LDFLAGS=	-fuse-ld=lld

### Octopus flags
CCS=		clang gcc
OPTIMIZATIONS=	0 1 2 3
RETPOLINE= 	mretpoline
UUID:=		$(shell uuid)
RESULTS_FILE=	results-$(UUID).log
SSH_KEY=	octoupload
TIMES=		3
#FLAGS=		-v

### Octopus internals
TEE=		| tee -a $(RESULTS_FILE)

### Compilers
CPROGS=		$(foreach C, $(CCS), $(addsuffix -$(C), $(PROG)))

### Optimizations 
OPROGS=		$(foreach O, $(OPTIMIZATIONS), $(addsuffix -O$(O), $(CPROGS)))

### Static
SPROGS=		$(addsuffix -static, $(foreach O, $(OPTIMIZATIONS), $(addsuffix -O$(O), $(CPROGS))))

### Retpoline
## clang 
# dynamic
RCPROGS=	$(addsuffix -retpoline, $(filter spectre-clang%, $(OPROGS)))
# static 
RSCPROGS=	$(addsuffix -retpoline, $(filter spectre-clang%, $(SPROGS)))
## gcc 
# dynamic 
RGPROGS=	$(addsuffix -retpoline, $(filter spectre-gcc%, $(OPROGS)))
# static
RSGPROGS=	$(addsuffix -retpoline, $(filter spectre-gcc%, $(SPROGS)))

PROGS=		$(OPROGS)
PROGS+=		$(SPROGS)
PROGS+=		$(RCPROGS)
PROGS+=		$(RSCPROGS)
PROGS+=		$(RGROGS)
PROGS+=		$(RSGPROGS)


all: upload

upload: $(RESULTS_FILE)
	echo -e "\033[4mUploading $^ to www.sk4.nz\033[0m"
	sftp -b - -i $(SSH_KEY) -o BatchMode=yes -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
		octoupload@www.sk4.nz: <<< $$'put $^'

build: $(PROGS)

%.log: build
	echo -e "\033[1m\033[94m________          __";
	echo "\_____  \   _____/  |_  ____ ______  __ __  ______";
	echo " /   |   \_/ ___\   __\/  _ \\____ \|  |  \/  ___/";
	echo "/    |    \  \___|  | (  <_> )  |_> >  |  /\___ \ ";
	echo "\_______  /\___  >__|  \____/|   __/|____//____  >";
	echo -e "        \/     \/            |__|              \/\033[0m";
	echo -e "                       Samuel AUBERTIN - EURECOM\n"
	echo -e "\033[4mUUID\033[0m\t\t$(UUID)" $(TEE)
	echo -e "\033[4mCPU\033[0m\t\t"$$(LC_ALL=en_US.UTF-8 lscpu | grep "Model name" | cut -d":" -f 2 | sort | uniq | awk '{$$1=$$1;print}') $(TEE)
	echo -e "\033[4mMicrocode\033[0m\t"$$(grep microcode /proc/cpuinfo | sort | uniq | awk '{print $$NF}') $(TEE)
	echo -e "\033[4mKernel\033[0m\t\t"$$(uname -svm) $(TEE)
	echo -e "\033[4mKRETPOLINE\033[0m\t"$$(cat /boot/config-$$(uname -r) | grep RETPOLINE)
	echo -e "\033[4mClang\033[0m\t\t"$$(clang -v 2>&1 | head -n 1) $(TEE)
	echo -e "\033[4mGCC\033[0m\t\t"$$(gcc -v 2>&1 | grep 'gcc version') $(TEE)
	echo -e "\033[4mVulnerablities\033[0m" $(TEE)
	LC_ALL=en_US.UTF-8 lscpu | grep Vuln | awk '{s = ""; for(i = 2; i <= NF; i++) s = s $$i " "; print "\t\t" s }' $(TEE)
	echo
	taskset 01 ./$(firstword $(PROGS)) -c $(TEE); \
	for p in $(PROGS); do \
		for t in $$(seq $(TIMES)); do \
			sleep 1; \
			taskset 01 ./$$p $(FLAGS) $(TEE); \
		done \
	done 

$(OPROGS):
	$(word 2, $(subst -, ,$@)) $(CFLAGS) $(LDFLAGS) -$(word 3, $(subst -, ,$@))  -o $@ $(PROG).c

$(SPROGS):
	$(word 2, $(subst -, ,$@)) $(addprefix -, $(word 4, $(subst -, ,$@))) $(CFLAGS) -$(word 3, $(subst -, ,$@))  -o $@ $(PROG).c

$(RCPROGS):
	$(word 2, $(subst -, ,$@)) $(CFLAGS) -mretpoline $(LDFLAGS) -z retpolineplt -$(word 3, $(subst -, ,$@)) -o $@ $(PROG).c

$(RSCPROGS):
	$(word 2, $(subst -, ,$@)) $(addprefix -, $(word 4, $(subst -, ,$@))) $(CFLAGS) -mretpoline  -$(word 3, $(subst -, ,$@)) -o $@ $(PROG).c

$(RGPROGS):
	$(word 2, $(subst -, ,$@)) $(CFLAGS) -mfunction-return=thunk -mindirect-branch=thunk -mindirect-branch-register $(LDFLAGS) -z retpolineplt -$(word 3, $(subst -, ,$@)) -o $@ $(PROG).c

$(RSGPROGS):
	$(word 2, $(subst -, ,$@)) $(addprefix -, $(word 4, $(subst -, ,$@))) $(CFLAGS) -mfunction-return=thunk -mindirect-branch=thunk -mindirect-branch-register -$(word 3, $(subst -, ,$@)) -o $@ $(PROG).c

clean:
	rm -rf $(PROGS) *.log