Add some comments to ragg2-cc

binr/ragg2/ragg2-cc

@@ -13,6 +13,7 @@
 #  add support for arm
 #  add support for nested shellcodes
 
+# Find which compiler is installed
 if [ -z "${CC}" ]; then
 	for a in llvm-gcc clang gcc ; do
 		$a --version >/dev/null 2>&1
@@ -26,12 +27,15 @@ if [ -z "${CC}" ]; then
 		exit 1
 	fi
 fi
-A=x86
+
+# Get path for sflib
 SFLIBPATH=`ragg2 -v | cut -d ' ' -f 3-`
 if [ ! -d "${SFLIBPATH}" ]; then
 	echo "Cannot find ${SFLIBPATH}"
 	exit 1
 fi
+
+# Get local architecture
 case "`uname -m`" in
 "x86_64")
 	B=64
@@ -63,62 +67,65 @@ Darwin)
 	K=linux
 	;;
 esac
+
 X=0
 C=""
 D=""
 O=""
 F=""
 ASM=0
+A=x86
 while : ; do
 	[ -z "$1" ] && break
 	F=$1
 	case "$F" in
-	-a)
+	-a) # architecture (x86, mips, arm)
 		shift
 		A=$1
 		[ -z "$A" ] && { echo "Missing argument for -a" ; exit 1; }
 		;;
-	-b)
+	-b)  # register size (32, 64, ...)
 		shift
 		B=$1
 		[ -z "$B" ] && { echo "Missing argument for -b" ; exit 1; }
 		;;
-	-k)
+	-k)  # kernel
 		shift
 		K=$1
 		[ -z "$K" ] && { echo "Missing argument for -k" ; exit 1; }
 		;;
-	-x)
+	-x)  # execute
 		X=1
 		;;
-	-c)
+	-c)  # set configuration option
 		C=1
 		;;
-	-d)
+	-d)  # patch dword (4 bytes) at given offset
 		D=1
 		;;
-	-s)
+	-s)  # show assembler
 		ASM=1
 		;;
-	-o)
+	-o)  # output file
 		shift
 		O=$1
 		if [ -z "$O" ]; then
 			echo "Missing argument for -o"
 			exit 1
 		fi
 		;;
-	-h)
+	-h)  # help
 		dohelp
 		exit 0
 		;;
-	-v)
+	-v)  # version
 		ragg2 -v | sed -e 's,2,2-cc,'
 		exit 0
 		;;
 	esac
 	shift
 done
+
 if [ -z "$F" ]; then
 	dohelp
 	exit 1
@@ -163,11 +170,8 @@ fi
 [ "$A$K" ] && ARCH="$K-$A-$B"
 
 OPT=-Os
-
-#/usr/include/libr/sflib/
-#CFLAGS="-shared -fPIC -fPIE -pie "
-#CFLAGS="${CFLAGS} -shared -fPIC -fPIE -pie "
 CFLAGS="${CFLAGS} -nostdinc -include ${SFLIBPATH}/${ARCH}/sflib.h"
+CFLAGS="${CFLAGS} -z execstack"
 CFLAGS="${CFLAGS} -fomit-frame-pointer -finline-functions -fno-zero-initialized-in-bss"
 LDFLAGS="${LDFLAGS} -nostdlib"