Fix fpga_compress race condition and isolate it in tools

Makefile

@@ -33,7 +33,7 @@ endif
 -include .Makefile.options.cache
 include common_arm/Makefile.hal
 
-all clean: %: client/% bootrom/% armsrc/% recovery/% mfkey/% nonce2key/%
+all clean: %: client/% bootrom/% armsrc/% recovery/% mfkey/% nonce2key/% fpga_compress/%
 
 mfkey/%: FORCE
 	$(info [*] MAKE $@)
@@ -41,10 +41,13 @@ mfkey/%: FORCE
 nonce2key/%: FORCE
 	$(info [*] MAKE $@)
 	$(Q)$(MAKE) --no-print-directory -C tools/nonce2key $(patsubst nonce2key/%,%,$@)
+fpga_compress/%: FORCE
+	$(info [*] MAKE $@)
+	$(Q)$(MAKE) --no-print-directory -C tools/fpga_compress $(patsubst fpga_compress/%,%,$@)
 bootrom/%: FORCE cleanifplatformchanged
 	$(info [*] MAKE $@)
 	$(Q)$(MAKE) --no-print-directory -C bootrom $(patsubst bootrom/%,%,$@)
-armsrc/%: FORCE cleanifplatformchanged
+armsrc/%: FORCE cleanifplatformchanged fpga_compress/%
 	$(info [*] MAKE $@)
 	$(Q)$(MAKE) --no-print-directory -C armsrc $(patsubst armsrc/%,%,$@)
 client/%: FORCE
@@ -74,6 +77,7 @@ help:
 	@echo "+ client        - Make only the OS-specific host client"
 	@echo "+ mfkey         - Make tools/mfkey"
 	@echo "+ nonce2key     - Make tools/nonce2key"
+	@echo "+ fpga_compress - Make tools/fpga_compress"
 	@echo
 	@echo "+ style         - Apply some automated source code formatting rules"
 	@echo "+ checks        - Detect various encoding issues in source code"
@@ -93,6 +97,8 @@ mfkey: mfkey/all
 
 nonce2key: nonce2key/all
 
+fpga_compress: fpga_compress/all
+
 flash-bootrom: bootrom/obj/bootrom.elf $(FLASH_TOOL)
 	$(FLASH_TOOL) $(FLASH_PORT) -b $(subst /,$(PATHSEP),$<)
 

armsrc/Makefile

@@ -135,7 +135,7 @@ include ../common_arm/Makefile.common
 COMMON_FLAGS =  -Os
 
 OBJS = $(OBJDIR)/fullimage.s19
-FPGA_COMPRESSOR = ../client/fpga_compress
+FPGA_COMPRESSOR = ../tools/fpga_compress/fpga_compress
 
 all: $(OBJS)
 
@@ -163,8 +163,8 @@ else
 endif
 
 $(FPGA_COMPRESSOR):
-	$(info [*] MAKE $@)
+	$(error [!] MISSING $@ => To build it, go the root of the repo and do "make $(notdir $@)")
-	$(Q)$(MAKE) --no-print-directory -C ../client $(notdir $(FPGA_COMPRESSOR))
+	$(error [!] MISSING $@)
 
 $(OBJDIR)/fullimage.stage1.elf: $(VERSIONOBJ) $(OBJDIR)/fpga_all.o $(THUMBOBJ) $(ARMOBJ)
 	$(info [=] LD $@)

client/Makefile

@@ -291,14 +291,14 @@ ifeq "$(SUPPORTS_AVX512)" "True"
     MULTIARCHOBJS +=  $(MULTIARCHSRCS:%.c=$(OBJDIR)/%_AVX512.o)
 endif
 
-BINS = proxmark3 flasher fpga_compress
+BINS = proxmark3 flasher
 CLEAN = $(BINS) $(DEPENDENCY_FILES) $(COREOBJS) $(CMDOBJS) $(OBJCOBJS) $(ZLIBOBJS) $(QTGUIOBJS) $(MULTIARCHOBJS) $(OBJDIR)/*.o *.moc.cpp ui/ui_overlays.h lualibs/pm3_cmd.lua lualibs/mf_default_keys.lua
 
 # need to assign dependancies to build these first...
 all: lua_build jansson_build mbedtls_build cbor_build $(BINS)
 
 all-static: LDLIBS:=-static $(LDLIBS)
-all-static: proxmark3 flasher fpga_compress
+all-static: $(BINS)
 
 proxmark3: LDLIBS+=$(LUALIB) $(JANSSONLIB) $(MBEDTLSLIB) $(CBORLIB) $(QTLDLIBS)
 proxmark3: $(OBJDIR)/proxmark3.o $(COREOBJS) $(CMDOBJS) $(OBJCOBJS) $(QTGUIOBJS) $(MULTIARCHOBJS) $(ZLIBOBJS) lualibs/pm3_cmd.lua lualibs/mf_default_keys.lua
@@ -309,10 +309,6 @@ flasher: $(OBJDIR)/flash.o $(OBJDIR)/flasher.o $(COREOBJS) $(OBJCOBJS)
 	$(info [=] LD $@)
 	$(Q)$(LD) $(LDFLAGS) $^ $(LDLIBS) -o $@
 
-fpga_compress: $(OBJDIR)/fpga_compress.o $(ZLIBOBJS)
-	$(info [=] LD $@)
-	$(Q)$(LD) $(LDFLAGS) $(ZLIBFLAGS) $^ $(LDLIBS) -o $@
-
 proxgui.cpp: ui/ui_overlays.h
 
 proxguiqt.moc.cpp: proxguiqt.h
@@ -427,7 +423,7 @@ DEPENDENCY_FILES = $(patsubst %.c, $(OBJDIR)/%.d, $(CORESRCS) $(CMDSRCS) $(ZLIBS
 	$(patsubst %.o, %.d, $(MULTIARCHOBJS)) \
 	$(patsubst %.cpp, $(OBJDIR)/%.d, $(QTGUISRCS)) \
 	$(patsubst %.m, $(OBJDIR)/%.d, $(OBJCSRCS)) \
-	$(OBJDIR)/proxmark3.d $(OBJDIR)/flash.d $(OBJDIR)/flasher.d $(OBJDIR)/fpga_compress.d
+	$(OBJDIR)/proxmark3.d $(OBJDIR)/flash.d $(OBJDIR)/flasher.d
 
 $(DEPENDENCY_FILES): ;
 .PRECIOUS: $(DEPENDENCY_FILES)

common_arm/Makefile.common

@@ -35,7 +35,7 @@ MV=mv
 
 OBJDIR = obj
 
-INCLUDE = -I../include -I../common_arm -I../common -I.
+INCLUDE = -I../include -I../common_arm -I../common_fpga -I../common -I.
 
 TAR=tar
 TARFLAGS = -C .. -rvf

common_fpga/fpga.h

@@ -7,7 +7,8 @@
 #ifndef __FPGA_H
 #define __FPGA_H
 
-#include "common.h"
+#include <stdbool.h>
+#include <inttypes.h>
 
 #define FPGA_BITSTREAM_FIXED_HEADER_SIZE    sizeof(bitparse_fixed_header)
 #define FPGA_INTERLEAVE_SIZE                288

tools/fpga_compress/Makefile

@@ -0,0 +1,69 @@
+# Hide full compilation line:
+ifneq ($(V),1)
+  Q?=@
+endif
+# To see full command lines, use make V=1
+
+CC = gcc
+CXX = g++
+LD = g++
+RM = rm -f
+MV = mv
+
+VPATH = ../../common/zlib
+OBJDIR = obj
+
+# RPi Zero gcc requires -latomic
+# but MacOSX /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld
+# doesn't recognize option --as-needed
+ifneq ($(platform),Darwin)
+    LDLIBS += -Wl,--as-needed -latomic -Wl,--no-as-needed
+endif
+
+LIBS = -I../../common/zlib
+INCLUDES_CLIENT = -I../../common_fpga $(LIBS)
+
+CFLAGS += -std=c99 -D_ISOC99_SOURCE -DPRESETS $(INCLUDES_CLIENT) -Wall -Werror -g -O3
+
+# Flags to generate temporary dependency files
+DEPFLAGS = -MT $@ -MMD -MP -MF $(OBJDIR)/$*.Td
+# make temporary to final dependency files after successful compilation
+POSTCOMPILE = $(MV) -f $(OBJDIR)/$*.Td $(OBJDIR)/$*.d
+
+ZLIBSRCS = deflate.c adler32.c trees.c zutil.c inflate.c inffast.c inftrees.c
+ZLIBFLAGS = -DZ_SOLO -DZ_PREFIX -DNO_GZIP -DZLIB_PM3_TUNED
+#-DDEBUG -Dverbose=1
+
+ZLIBOBJS = $(ZLIBSRCS:%.c=$(OBJDIR)/%.o)
+
+BINS = fpga_compress
+CLEAN = $(BINS) $(DEPENDENCY_FILES) $(ZLIBOBJS) $(OBJDIR)/*.o
+
+# need to assign dependancies to build these first...
+all: $(BINS)
+
+all-static: LDLIBS:=-static $(LDLIBS)
+all-static: $(BINS)
+
+fpga_compress: $(OBJDIR)/fpga_compress.o $(ZLIBOBJS)
+	$(info [=] LD $@)
+	$(Q)$(LD) $(LDFLAGS) $(ZLIBFLAGS) $^ $(LDLIBS) -o $@
+
+clean:
+	$(Q)$(RM) $(CLEAN)
+
+.PHONY: all clean
+
+%.o: %.c
+$(OBJDIR)/%.o : %.c $(OBJDIR)/%.d
+	$(info [-] CC $<)
+	$(Q)$(CC) $(DEPFLAGS) $(CFLAGS) $(ZLIBFLAGS) -c -o $@ $<
+	$(Q)$(POSTCOMPILE)
+
+DEPENDENCY_FILES = $(patsubst %.c, $(OBJDIR)/%.d, $(ZLIBSRCS)) $(OBJDIR)/fpga_compress.d
+
+$(DEPENDENCY_FILES): ;
+.PRECIOUS: $(DEPENDENCY_FILES)
+
+-include $(DEPENDENCY_FILES)
+

tools/fpga_compress/fpga_compress.c

@@ -15,7 +15,6 @@
 #include <stdlib.h>
 #include <libgen.h>
 #include <string.h>
-#include <inttypes.h>
 #include "fpga.h"
 #include "zlib.h"
 
@@ -23,6 +22,7 @@
 #define COMPRESS_LEVEL          9  // use best possible compression
 #define COMPRESS_WINDOW_BITS    15 // default = max = 15 for a window of 2^15 = 32KBytes
 #define COMPRESS_MEM_LEVEL      9  // determines the amount of memory allocated during compression. Default = 8.
+
 /* COMPRESS_STRATEGY can be
     Z_DEFAULT_STRATEGY (the default),
     Z_FILTERED (more huffmann, less string matching),