jb_protect for all device architectures

jb_protect_all_archs.h

//
//  jailbreak.h
//  jailbreak-protect
//
//  Created by Jonathan Cardasis (C) on 10/11/19.
//  Copyright © 2019 Jonathan Cardasis (C). All rights reserved.
//

#ifndef jailbreak_h
#define jailbreak_h
//#define IS_APP_STORE_BUILD !TARGET_IPHONE_SIMULATOR && !DEBUG

//#if IS_APP_STORE_BUILD

/**
 Most anti-debug code relies on libraries which are easy enough to hook
 the symbols and bypass these checks. This is an ARM assembly solution
 which requires much more effort to bypass.
 */
__attribute__((constructor)) static void prevent_ptrace() {
    #ifdef __arm__ // 32 bit physical device
    asm volatile (
        "mov r0 #31\n"
        "mov r1, #0\n"
        "mov r2, #0\n"
        "mov r12, #26\n"
        "svc #80\n"
    );
    #elif __arm64__ // 64 bit physical device
    asm volatile (
        "mov x0, #26\n" // ptrace syscall (26 in XNU)
        "mov x1, #31\n" // PT_DENY_ATTACH (0x1f) - first arg
        "mov x2, #0\n"
        "mov x3, #0\n"
        "mov x16, #0\n"
        "svc #128\n" // make syscall
    );
    #else // x86_64 (simulator)
    asm volatile (
        "pushq %rax\n"
        "pushq %rdi\n"
        "movq $0x1f, %rdi\n"
        "movq $0x200001A, %rax\n"
        "syscall\n"
        "popq %rdi\n"
        "popq %rax\n"
    );
    #endif
}

//#endif
#endif /* jailbreak_h */