smh

AltStore.xcodeproj/project.pbxproj

@@ -590,6 +590,8 @@
 		B3C3960F284F53E900DA9E2F /* AltBackup.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = AltBackup.xcconfig; sourceTree = "<group>"; };
 		B3EE16B52925E27D00B3B1F5 /* AnisetteManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnisetteManager.swift; sourceTree = "<group>"; };
 		BD4513AA2C6FA98C0052BCC0 /* AppExtensionView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppExtensionView.swift; sourceTree = "<group>"; };
+		BD7FFE492D1D2B7F00A9623D /* ptrace.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ptrace.m; sourceTree = "<group>"; };
+		BD7FFE4A2D1D2B8F00A9623D /* ptrace.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ptrace.h; sourceTree = "<group>"; };
 		BF02419522F2199300129732 /* RefreshAttemptsViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RefreshAttemptsViewController.swift; sourceTree = "<group>"; };
 		BF08858222DE795100DE9F1E /* MyAppsViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MyAppsViewController.swift; sourceTree = "<group>"; };
 		BF08858422DE7EC800DE9F1E /* UpdateCollectionViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UpdateCollectionViewCell.swift; sourceTree = "<group>"; };
@@ -1307,6 +1309,7 @@
 		BF66EE7F2501AE50007EE018 /* AltStoreCore */ = {
 			isa = PBXGroup;
 			children = (
+				BD7FFE492D1D2B7F00A9623D /* ptrace.m */,
 				BF66EE802501AE50007EE018 /* AltStoreCore.h */,
 				BF66EE8A2501AEB1007EE018 /* Components */,
 				BF66EEE32501AED0007EE018 /* Extensions */,
@@ -1317,6 +1320,7 @@
 				BF66EE8D2501AEBC007EE018 /* Types */,
 				BF66EE812501AE50007EE018 /* Info.plist */,
 				BFCB9205250AB1FF0057B44E /* Resources */,
+				BD7FFE4A2D1D2B8F00A9623D /* ptrace.h */,
 			);
 			path = AltStoreCore;
 			sourceTree = "<group>";

AltStore/AppDelegate.swift

@@ -233,6 +233,13 @@ private extension AppDelegate
                 
                 return true
                 
+            case "jit":
+                let queryItems = components.queryItems?.reduce(into: [String: String]()) { $0[$1.name.lowercased()] = $1.value } ?? [:]
+                guard let pidstr = queryItems["pid"], let pid = Int32(pidstr) else { return false }
+                
+                return ptrace(14, pid, nil, 0) == 0
+
+                
             default: return false
             }
         }

AltStoreCore/AltStoreCore.h

@@ -26,3 +26,4 @@ FOUNDATION_EXPORT const unsigned char AltStoreCoreVersionString[];
 #import <AltStoreCore/ALTWrappedError.h>
 #import <AltStoreCore/NSError+ALTServerError.h>
 #import <AltStoreCore/CFNotificationName+AltStore.h>
+#import "ptrace.h"

AltStoreCore/ptrace.h

@@ -0,0 +1,14 @@
+//
+//  ptrace.h
+//  AltStore
+//
+//  Created by June P on 12/26/24.
+//  Copyright © 2024 SideStore. All rights reserved.
+//
+
+#ifndef ptrace_h
+#define ptrace_h
+
+int ptrace(int request, pid_t pid, caddr_t addr, int data);
+
+#endif /* ptrace_h */

AltStoreCore/ptrace.m

@@ -0,0 +1,27 @@
+//
+//  ptrace.m
+//  AltStore
+//
+//  Created by June P on 12/26/24.
+//  Copyright © 2024 SideStore. All rights reserved.
+//
+
+
+int ptrace(int request, pid_t pid, caddr_t addr, int data) {
+    int result = 0;
+    __asm__ (
+        "MOV x16, #26          \n"   // Syscall number for ptrace
+        "MOV x0, %[request]    \n"   // Pass request to x0
+        "MOV x1, %[pid]        \n"   // Pass pid to x1
+        "MOV x2, %[addr]       \n"   // Pass addr to x2
+        "MOV x3, %[data]       \n"   // Pass data to x3
+        "SVC 0                 \n"   // Make the syscall (0 for ARM64)
+        : [result] "=r" (result)     // No output
+        : [request] "r" (request),   // Input constraints
+          [pid] "r" (pid),
+          [addr] "r" (addr),
+          [data] "r" (data)
+        : "x0", "x1", "x2", "x3", "x16"  // Clobber list
+    );
+    return result;
+}