feat: ✨ add support for armv7

- Updated .goreleaser.yaml to include armv7 builds.
- Added new shellcode payloads for armv7l
- Enhanced build-n-print.sh to support building payloads for armv7l architecture.
- Updated README.md with instructions for compiling payloads on Debian systems.

payloads/build-n-print.sh

@@ -25,7 +25,7 @@ if ! command -v aarch64-linux-gnu-as &> /dev/null; then
     exit 1
 fi
 
-for payload in *.S; do
+for payload in *aarch64.S; do
     # Assemble the source into an object file
     echo "[+] Building $payload"
     aarch64-linux-gnu-as $payload -o ${payload%.S}.o
@@ -34,4 +34,20 @@ for payload in *.S; do
     aarch64-linux-gnu-objcopy -O binary ${payload%.S}.o ${payload%.S}
     echo "[+] Printing $payload as hex"
     cat ${payload%.S} | python3 -c 'import sys, zlib; print(zlib.compress(sys.stdin.buffer.read()).hex())'
-done
+done
+
+if ! command -v arm-linux-gnueabihf-as &> /dev/null; then
+    echo "[!] arm-linux-gnueabihf-as could not be found. Please install binutils-arm-linux-gnueabihf"
+    exit 1
+fi
+
+for payload in *armv7l.S; do
+    # Assemble the source into an object file
+    echo "[+] Building $payload"
+    arm-linux-gnueabihf-as $payload -o ${payload%.S}.o
+    # Extract ONLY the raw bytes into a flat binary file
+    echo "[+] Extracting $payload as binary"
+    arm-linux-gnueabihf-objcopy -O binary ${payload%.S}.o ${payload%.S}
+    echo "[+] Printing $payload as hex"
+    cat ${payload%.S} | python3 -c 'import sys, zlib; print(zlib.compress(sys.stdin.buffer.read()).hex())'
+done