You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
4.7 KiB
116 lines
4.7 KiB
#
|
|
# american fuzzy lop - LLVM instrumentation
|
|
# -----------------------------------------
|
|
#
|
|
# Written by Laszlo Szekeres <lszekeres@google.com> and
|
|
# Michal Zalewski <lcamtuf@google.com>
|
|
#
|
|
# LLVM integration design comes from Laszlo Szekeres.
|
|
#
|
|
# Copyright 2015, 2016 Google LLC All rights reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at:
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
|
|
PREFIX ?= /usr/local
|
|
HELPER_PATH = $(PREFIX)/lib/afl
|
|
BIN_PATH = $(PREFIX)/bin
|
|
|
|
VERSION = $(shell grep '^\#define VERSION ' ../config.h | cut -d '"' -f2)
|
|
|
|
LLVM_CONFIG ?= llvm-config
|
|
|
|
CFLAGS ?= -O3 -funroll-loops
|
|
CFLAGS += -Wall -D_FORTIFY_SOURCE=2 -g -Wno-pointer-sign \
|
|
-DAFL_PATH=\"$(HELPER_PATH)\" -DBIN_PATH=\"$(BIN_PATH)\" \
|
|
-DVERSION=\"$(VERSION)\"
|
|
ifdef AFL_TRACE_PC
|
|
CFLAGS += -DUSE_TRACE_PC=1
|
|
endif
|
|
|
|
CXXFLAGS ?= -O3 -funroll-loops
|
|
CXXFLAGS += -Wall -D_FORTIFY_SOURCE=2 -g -Wno-pointer-sign \
|
|
-DVERSION=\"$(VERSION)\" -Wno-variadic-macros
|
|
|
|
# Mark nodelete to work around unload bug in upstream LLVM 5.0+
|
|
CLANG_CFL = `$(LLVM_CONFIG) --cxxflags` -Wl,-znodelete -fno-rtti -fpic $(CXXFLAGS)
|
|
CLANG_LFL = `$(LLVM_CONFIG) --ldflags` $(LDFLAGS)
|
|
|
|
# User teor2345 reports that this is required to make things work on MacOS X.
|
|
|
|
ifeq "$(shell uname)" "Darwin"
|
|
CLANG_LFL += -Wl,-flat_namespace -Wl,-undefined,suppress
|
|
endif
|
|
|
|
# We were using llvm-config --bindir to get the location of clang, but
|
|
# this seems to be busted on some distros, so using the one in $PATH is
|
|
# probably better.
|
|
|
|
ifeq "$(origin CC)" "default"
|
|
CC = clang
|
|
CXX = clang++
|
|
endif
|
|
|
|
ifndef AFL_TRACE_PC
|
|
PROGS = ../afl-clang-fast ../afl-llvm-pass.so ../afl-llvm-rt.o ../afl-llvm-rt-32.o ../afl-llvm-rt-64.o
|
|
else
|
|
PROGS = ../afl-clang-fast ../afl-llvm-rt.o ../afl-llvm-rt-32.o ../afl-llvm-rt-64.o
|
|
endif
|
|
|
|
all: test_deps $(PROGS) test_build all_done
|
|
|
|
test_deps:
|
|
ifndef AFL_TRACE_PC
|
|
@echo "[*] Checking for working 'llvm-config'..."
|
|
@which $(LLVM_CONFIG) >/dev/null 2>&1 || ( echo "[-] Oops, can't find 'llvm-config'. Install clang or set \$$LLVM_CONFIG or \$$PATH beforehand."; echo " (Sometimes, the binary will be named llvm-config-3.5 or something like that.)"; exit 1 )
|
|
else
|
|
@echo "[!] Note: using -fsanitize=trace-pc mode (this will fail with older LLVM)."
|
|
endif
|
|
@echo "[*] Checking for working '$(CC)'..."
|
|
@which $(CC) >/dev/null 2>&1 || ( echo "[-] Oops, can't find '$(CC)'. Make sure that it's in your \$$PATH (or set \$$CC and \$$CXX)."; exit 1 )
|
|
@echo "[*] Checking for '../afl-showmap'..."
|
|
@test -f ../afl-showmap || ( echo "[-] Oops, can't find '../afl-showmap'. Be sure to compile AFL first."; exit 1 )
|
|
@echo "[+] All set and ready to build."
|
|
|
|
../afl-clang-fast: afl-clang-fast.c | test_deps
|
|
$(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
|
|
ln -sf afl-clang-fast ../afl-clang-fast++
|
|
|
|
../afl-llvm-pass.so: afl-llvm-pass.so.cc | test_deps
|
|
$(CXX) $(CLANG_CFL) -shared $< -o $@ $(CLANG_LFL)
|
|
|
|
../afl-llvm-rt.o: afl-llvm-rt.o.c | test_deps
|
|
$(CC) $(CFLAGS) -fPIC -c $< -o $@
|
|
|
|
../afl-llvm-rt-32.o: afl-llvm-rt.o.c | test_deps
|
|
@printf "[*] Building 32-bit variant of the runtime (-m32)... "
|
|
@$(CC) $(CFLAGS) -m32 -fPIC -c $< -o $@ 2>/dev/null; if [ "$$?" = "0" ]; then echo "success!"; else echo "failed (that's fine)"; fi
|
|
|
|
../afl-llvm-rt-64.o: afl-llvm-rt.o.c | test_deps
|
|
@printf "[*] Building 64-bit variant of the runtime (-m64)... "
|
|
@$(CC) $(CFLAGS) -m64 -fPIC -c $< -o $@ 2>/dev/null; if [ "$$?" = "0" ]; then echo "success!"; else echo "failed (that's fine)"; fi
|
|
|
|
test_build: $(PROGS)
|
|
@echo "[*] Testing the CC wrapper and instrumentation output..."
|
|
unset AFL_USE_ASAN AFL_USE_MSAN AFL_INST_RATIO; AFL_QUIET=1 AFL_PATH=. AFL_CC=$(CC) ../afl-clang-fast $(CFLAGS) ../test-instr.c -o test-instr $(LDFLAGS)
|
|
# Use /dev/null to avoid problems with optimization messing up expected
|
|
# branches. See https://github.com/google/AFL/issues/30.
|
|
../afl-showmap -m none -q -o .test-instr0 ./test-instr < /dev/null
|
|
echo 1 | ../afl-showmap -m none -q -o .test-instr1 ./test-instr
|
|
@rm -f test-instr
|
|
@cmp -s .test-instr0 .test-instr1; DR="$$?"; rm -f .test-instr0 .test-instr1; if [ "$$DR" = "0" ]; then echo; echo "Oops, the instrumentation does not seem to be behaving correctly!"; echo; echo "Please ping <lcamtuf@google.com> to troubleshoot the issue."; echo; exit 1; fi
|
|
@echo "[+] All right, the instrumentation seems to be working!"
|
|
|
|
all_done: test_build
|
|
@echo "[+] All done! You can now use '../afl-clang-fast' to compile programs."
|
|
|
|
.NOTPARALLEL: clean
|
|
|
|
clean:
|
|
rm -f *.o *.so *~ a.out core core.[1-9][0-9]* test-instr .test-instr0 .test-instr1
|
|
rm -f $(PROGS) ../afl-clang-fast++
|