From 8355a95407026e043dc5786b9810dcd72bc47809 Mon Sep 17 00:00:00 2001
From: Tom Najdek <tom@doppnet.com>
Date: Sat, 2 Aug 2025 15:59:48 +0200
Subject: [PATCH] Warn users running non-ARM version on ARM CPU on Linux
 (#5461)

---
 chrome/content/zotero/xpcom/zotero.js | 49 +++++++++++++++++++++++++++
 chrome/content/zotero/zoteroPane.js   |  4 +--
 2 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/chrome/content/zotero/xpcom/zotero.js b/chrome/content/zotero/xpcom/zotero.js
index c402e8aff9..0e68211fa7 100644
--- a/chrome/content/zotero/xpcom/zotero.js
+++ b/chrome/content/zotero/xpcom/zotero.js
@@ -1419,6 +1419,55 @@ const { CommandLineOptions } = ChromeUtils.importESModule("chrome://zotero/conte
 			return false;
 		}
 	}
+
+	this.isLinux64EmulatedOnArm = function () {
+		if (!this.isLinux) {
+			return false;
+		}
+		
+		// We only check if x86_64 build is running on ARM
+		if (this.arch !== "x86_64") {
+			return false;
+		}
+		
+		try {
+			const { ctypes } = ChromeUtils.importESModule(
+				"resource://gre/modules/ctypes.sys.mjs"
+			);
+			
+			let utsname = ctypes.StructType("utsname", [
+				{ sysname: ctypes.ArrayType(ctypes.char, 65) },
+				{ nodename: ctypes.ArrayType(ctypes.char, 65) },
+				{ release: ctypes.ArrayType(ctypes.char, 65) },
+				{ version: ctypes.ArrayType(ctypes.char, 65) },
+				{ machine: ctypes.ArrayType(ctypes.char, 65) },
+				{ domainname: ctypes.ArrayType(ctypes.char, 65) }
+			]);
+			
+			let libc = ctypes.open("libc.so.6");
+			let unameC = libc.declare(
+				"uname",
+				ctypes.default_abi,
+				ctypes.int,
+				utsname.ptr
+			);
+			
+			let buf = utsname();
+			if (unameC(buf.address()) !== 0) {
+				libc.close();
+				return false;
+			}
+			
+			let machine = buf.machine.readString().trim();	// e.g., "x86_64", "aarch64"
+			libc.close();
+			
+			return ["aarch64", "arm64"].includes(machine.toLowerCase());
+		}
+		catch (e) {
+			Zotero.logError(e);
+			return false;
+		}
+	};
 	
 	/**
 	 * Get versions, platform, etc.
diff --git a/chrome/content/zotero/zoteroPane.js b/chrome/content/zotero/zoteroPane.js
index 5d92745e19..e1b4e56505 100644
--- a/chrome/content/zotero/zoteroPane.js
+++ b/chrome/content/zotero/zoteroPane.js
@@ -6590,9 +6590,9 @@ var ZoteroPane = new function () {
 		}
 		
 		const isWow64 = (await Services.sysinfo.processInfo).isWow64;
-		const isX64OnArm = Zotero.isWin64EmulatedOnArm();
+		const isX64OnArm = Zotero.isWin64EmulatedOnArm() || Zotero.isLinux64EmulatedOnArm();
 		
-		if (Zotero.isWin && (isWow64 || isX64OnArm)) {
+		if ((Zotero.isWin && isWow64) || isX64OnArm) {
 			let panel = document.getElementById('architecture-warning-container');
 			let action = document.getElementById('architecture-warning-action');
 			let close = document.getElementById('architecture-warning-close');