2016 DEF CON CTF Qualifier

Glados/COMPILING

@@ -0,0 +1,6 @@
+gcc 4.8.4 was compiled with ../gcc-4.8.4/configure --disable-libssp --disable-threads --prefix=/home/lightning/gcc-custom CFLAGS="-fPIC -fpic" CXXFLAGS="-fPIC -fpic" --enable-languages=c,c++ --disable-bootstrap --disable-nls
+
+gcc 4.8.4 was installed
+The two patches were applied to uClibc and uClibc++ appropriately
+The custom build of libsupc++.a was copied to the src/abi/libsupc folder of uClibc++ to allow for a fPIC version to be available
+Final compiled libaries and custom gcc used to compile Glados to allow for moving the stacic binary without hard locations being set by the compiler

Glados/Makefile

@@ -0,0 +1,32 @@
+ROOT=/home/lightning
+CC=$(ROOT)/gcc-custom/bin/gcc
+CPP=$(ROOT)/gcc-custom/bin/g++
+UCLIBC=$(ROOT)/uClibc
+UCLIBCPLUS=$(ROOT)/uClibc++
+MODE=64
+CCFLAGS=-fPIC -fpic -O2 -m$(MODE) -std=c99 -Wall
+CPPFLAGS=-fPIC -fpic -Wno-sign-compare -Wno-unused-result -Wno-write-strings -O2 -m$(MODE) -std=c++11 -Wall -D_FORTIFY_SOURCE=0
+
+O_FILES = main.o classes.o in_out.o init.o
+
+all : $(O_FILES)
+	$(CPP) $(CPPFLAGS) -o glados $(O_FILES) $(UCLIBC)/usr/lib/crt1.o -nostdlib -static -lc -L$(UCLIBC)/usr/lib -L$(UCLIBCPLUS)/lib -luClibc++ -lc
+	strip -g -S -d glados
+	strip -s glados
+	strip -x glados
+	strip -X glados
+
+# dependency stuff, see: http://www.cs.berkeley.edu/~smcpeak/autodepend/autodepend.html
+# pull in dependency info for *existing* .o files
+-include $(O_FILES:.o=.d)
+
+.SUFFIXES : .o .c .cpp
+
+.cpp.o :
+	$(CPP) $(CPPFLAGS) -c $<
+
+.c.o :  
+	$(CC) $(CCFLAGS) -c $<
+
+clean:
+	rm -f glados *.o *.d