HOST_ARCH := $(shell uname -m)
HOST_ARCH_32 := empty

ifeq ($(HOST_ARCH),x86_64)
    HOST_ARCH = x86-64
    HOST_ARCH_32 := i386
else ifeq ($(HOST_ARCH),i686)
    HOST_ARCH := i386
endif

ZIGCC           = uv run python3 -m ziglang cc
CC              =      gcc
CXX             =      g++
MUSLCC          =      musl-gcc
DEBUG           =      1
CFLAGS         +=      -Wall
SOURCES_C       =      $(wildcard *.native.c) $(wildcard *.$(HOST_ARCH).c) $(wildcard *.$(HOST_ARCH_32).c)
LINKED_C        =      $(SOURCES_C:.c=.out)

NASM            =      nasm -f elf64
LD              =      ld
SOURCES_ASM     =      $(wildcard *.$(HOST_ARCH).asm) $(wildcard *.$(HOST_ARCH_32).asm)
LINKED_ASM      =      $(SOURCES_ASM:.asm=.out)
LDFLAGS         =

GO              =      go
SOURCES_GO      =      $(wildcard *.native.go) $(wildcard *.$(HOST_ARCH).go) $(wildcard *.$(HOST_ARCH_32).go)
LINKED_GO       =      $(SOURCES_GO:.go=.out)

ifeq ($(TARGET), x86)
CFLAGS         +=      -m32
endif

ifeq ($(DEBUG), 1)
CFLAGS         +=      -DDEBUG=1 -ggdb -O0 -gdwarf-4
else
CFLAGS         +=      -O1
endif

# LLDB does not support PLT symbolication with -fcf-protection :(
CFLAGS         += -fcf-protection=none

PWD=$(shell pwd)
# Apparently we don't have this version? :(
#GLIBC=/glibc_versions/2.29/tcache_x64
GLIBC_2_33=$(PWD)/glibcs/2.33

.PHONY : all clean

CUSTOM_TARGETS = reference_bin_pie.native.out reference_bin_nopie.native.out reference_bin_nopie.i386.out symbol_1600_and_752.native.out initialized_heap.x86-64.out initialized_heap_big.i386.out linked_lists.native.out onegadget.x86-64.out onegadget.i386.out heap_jemalloc_extent_info.native.out heap_jemalloc_heap.native.out heap_musl_dyn.native.out heap_musl_static.native.out gosample.i386.out gosample.x86-64.out
NATIVE_CUSTOM_TARGETS  := $(filter %.native.out %.$(HOST_ARCH).out %.$(HOST_ARCH_32).out,$(CUSTOM_TARGETS))

ALL_TARGETS := $(LINKED_C) $(LINKED_ASM) $(LINKED_GO) $(NATIVE_CUSTOM_TARGETS)

all: $(ALL_TARGETS)

%.out : %.c
	@echo "[+] Building '$@'"
	@$(CC) $(CFLAGS) -w -o $@ $? $(LDFLAGS)

%.out : %.asm
	@echo "[+] Building '$@'"
	@$(NASM) -o $@.o $?
	@$(LD) -Ttext 0x400080 --section-start .note.gnu.property=0x8000000 -o $@ $@.o

%.out : %.go
	@echo "[+] Building '$@'"
	@$(GO) build -gcflags "-N -l" -o $@ $?
	@# Not stripped on purpose

crash_simple.native.out: crash_simple.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} -O0 -nostdlib -ffreestanding -fno-stack-protector -fno-sanitize=all -o $@ $?

gosample.i386.out : gosample.native.go
	@echo "[+] Building '$@'"
	@GOARCH=386 $(GO) build -gcflags "-N -l" -o $@ $?
	@# Not stripped on purpose

gosample.x86-64.out : gosample.native.go
	@echo "[+] Building '$@'"
	@GOARCH=amd64 $(GO) build -gcflags "-N -l" -o $@ $?
	@# Not stripped on purpose

heap_bugs.x86-64.out: heap_bugs.x86-64.c
	@echo "[+] Building '$@'"
	${ZIGCC} \
	${CFLAGS} \
	-Wno-int-to-pointer-cast -Wno-int-conversion -Wno-unused-variable \
	-target x86_64-linux-gnu.2.33 \
	-Wl,-rpath=${GLIBC_2_33}:\
	-Wl,--dynamic-linker=${GLIBC_2_33}/ld-linux-x86-64.so.2 \
	-o $@ $?

# TODO/FIXME: We should probably force this to 2.29? a version with tcache?
#heap_bins.out: heap_bins.c
#	@echo "[+] Building '$@'"
#	${ZIGCC} \
#	-target x86_64-linux-gnu.2.33 \
#	-Wl,-rpath=${GLIBC_2_33} \
#	-Wl,--dynamic-linker=${GLIBC_2_33}/ld-linux-x86-64.so.2 \
#	-g -O0 -o $@ $?

# Note: we use -pthread -lpthread because we hit this bug on CI builds:
# https://sourceware.org/bugzilla/show_bug.cgi?id=24548
heap_vis.native.out: heap_vis.native.c
	@echo "[+] Building '$@'"
	${CC} -g -O0 -Wno-nonnull -o $@ $? -pthread -lpthread

heap_malloc_chunk.native.out: heap_malloc_chunk.native.c
	@echo "[+] Building '$@'"
	${CC} -g -O0 -Wno-nonnull -Wno-unused-result -o $@ $? -pthread -lpthread

heap_jemalloc_extent_info.native.out: heap_jemalloc_extent_info.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} -g -O0 -Wno-nonnull -Wno-unused-result \
	-o $@ $? \
	-Wl,-Bstatic -ljemalloc -Wl,-Bdynamic -lpthread -lm -lstdc++ -pthread -ldl

heap_jemalloc_heap.native.out: heap_jemalloc_heap.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} -g -O0 -Wno-nonnull -Wno-unused-result \
	-o $@ $? \
	-Wl,-Bstatic -ljemalloc -Wl,-Bdynamic -lpthread -lm -lstdc++ -pthread -ldl

heap_musl_dyn.native.out: heap_musl.native.c
	@echo "[+] Building '$@'"
	${MUSLCC} -g3 -O0 -o $@ $?

# Ideally I would do:
# strip heap_musl_static.out
# here because it would ensure mallocng commands are tested on
# a musl with no symbols. But that also makes it very hard to
# write the tests.
heap_musl_static.native.out: heap_musl.native.c
	@echo "[+] Building '$@'"
	${MUSLCC} -g3 -O0 -static -o $@ $?

multiple_threads.native.out: multiple_threads.native.c
	@echo "[+] Building '$@'"
	${CC} -g -O0 -o $@ $? -pthread -lpthread

tls.x86-64.out: tls.x86-64.c
	@echo "[+] Building '$@'"
	${ZIGCC} \
	${CFLAGS} \
	-target x86_64-linux-gnu \
	-o $@ $?

tls.i386.out: tls.i386.c
	@echo "[+] Building '$@'"
	${ZIGCC} \
	${CFLAGS} \
	-target x86-linux-gnu \
	-o $@ $?

issue_1565.native.out: issue_1565.native.c
	@echo "[+] Building '$@'"
	${CC} -g -O0 -o $@ $? -pthread -lpthread

# TODO: Link against a specific GLIBC version >= 2.26
initialized_heap_big.i386.out: initialized_heap.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} \
	${CFLAGS} \
	-target x86-linux-gnu \
	-o $@ $?

# TODO: Link against a specific GLIBC version.
initialized_heap.x86-64.out: initialized_heap.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} \
	${CFLAGS} \
	-target x86_64-linux-gnu \
	-o $@ $?

onegadget.x86-64.out: onegadget.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} \
	${CFLAGS} \
	-target x86_64-linux-gnu \
	-o $@ $?

onegadget.i386.out: onegadget.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} \
	${CFLAGS} \
	-target x86-linux-gnu \
	-o $@ $?

clean :
	@echo "[+] Cleaning stuff"
	@rm -f $(LINKED_C) $(LINKED_ASM) $(LINKED_GO) *.out *.o

linked_lists.native.out: linked-lists.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} -fpie -g -o $@ $?

reference_bin_pie.native.out: reference-binary.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} -fpie -o $@ $?

reference_bin_nopie.native.out: reference-binary.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} -fno-pie -o $@ $?

reference_bin_nopie.i386.out: reference-binary.native.c
	@echo "[+] Building '$@'"
	${ZIGCC} -fno-pie -target x86-linux-gnu -o $@ $?

symbol_1600_and_752.native.out: symbol_1600_and_752.native.cpp
	${CXX} -O0 -ggdb -Wno-pmf-conversions -o $@ $?

canary.x86-64.out: canary.x86-64.c
	@echo "[+] Building '$@'"
	${ZIGCC} \
	${CFLAGS} \
	-target x86_64-linux-gnu \
	-o $@ $?

canary.i386.out: canary.i386.c
	@echo "[+] Building '$@'"
	${ZIGCC} \
	${CFLAGS} \
	-target x86-linux-gnu \
	-o $@ $?