Path A: add jmpscan; document FIFA-side flow blocked with live toolkit

protossl-scan: add `jmpscan` (find function-entry E9 detours leaving a module).
Used to try to locate EbisuSDK::GoOnline in FIFA23.exe, but the 505MB image is
mostly embedded data => ~3875 false positives, no clean detour cluster. Combined
with the no-string and worker-thread blocks, the FIFA-side online-flow is not
cleanly reachable with the live-memory toolkit. Documented the verdict in
connection-gate-findings.md: playable FUT is research-grade (needs interactive
IDA/Ghidra GUI + full EA-online/Blaze emulator); the clean-room spec is the
finished deliverable.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tools/protossl-scan/src/main.rs

@@ -183,6 +183,20 @@ fn main() {
         // callers <hex-addr | module+0xoffset> [pid|name]
         // Find direct call/jmp sites that target an address — walks up the call
         // graph (e.g. from a connect helper to the code that gates it).
+        // jmpscan [module] [pid|name]
+        // Find E9 rel32 jumps inside a module whose target leaves the module —
+        // i.e. inline-detour entry points (MS Detours hooks). Default module:
+        // FIFA23.exe; targets reveal the detoured EbisuSDK functions.
+        Some("jmpscan") => {
+            let modname = args.get(1).cloned().unwrap_or_else(|| "FIFA23".to_string());
+            let pid = resolve_pid(args.get(2).map(|s| s.as_str()));
+            let process = open_for_read(pid);
+            let modules = enumerate_modules(pid);
+            run_jmpscan(process, &modules, &modname);
+            unsafe {
+                let _ = CloseHandle(process);
+            }
+        }
         Some("callers") => {
             let arg = match args.get(1) {
                 Some(a) => a.clone(),
@@ -471,6 +485,64 @@ fn dump_neighbours(process: HANDLE, at: usize, modules: &[ModuleInfo]) {
 /// Scan app-module executable memory for near `call`/`jmp` (E8/E9 + rel32)
 /// instructions whose target is `target`. This walks UP the call graph — e.g.
 /// from a connect helper to the code that decides whether to call it.
+/// Scan a module's executable memory for `E9 rel32` near-jumps whose target is
+/// OUTSIDE the module — the signature of an inline detour (function entry patched
+/// to jump to an external trampoline). Reports source -> target for each.
+fn run_jmpscan(process: HANDLE, modules: &[ModuleInfo], modname: &str) {
+    let want = modname.to_ascii_lowercase();
+    let want = want.strip_suffix(".dll").unwrap_or(&want);
+    let want = want.strip_suffix(".exe").unwrap_or(want);
+    let m = match modules.iter().find(|m| {
+        let n = m.name.to_ascii_lowercase();
+        n.starts_with(want)
+    }) {
+        Some(m) => m,
+        None => {
+            println!("module '{modname}' not found");
+            return;
+        }
+    };
+    let base = m.base;
+    let end = m.base + m.size;
+    println!("== jmpscan {} [0x{base:X}..0x{end:X}] ==\n", m.name);
+
+    let allow = [(base, end)];
+    let mut hits: Vec<(usize, usize)> = Vec::new();
+    walk_regions(process, true, 4, Some(&allow), |chunk_base, bytes| {
+        if bytes.len() < 5 {
+            return;
+        }
+        for i in 1..=bytes.len() - 5 {
+            // Real detours patch a function entry, which MSVC pads with int3
+            // (0xCC) just before it. Requiring that preceding 0xCC filters out
+            // the flood of 0xE9 data bytes that aren't real instructions.
+            if bytes[i] != 0xE9 || bytes[i - 1] != 0xCC {
+                continue;
+            }
+            let rel = i32::from_le_bytes([bytes[i + 1], bytes[i + 2], bytes[i + 3], bytes[i + 4]]);
+            let src = chunk_base + i;
+            let tgt = (src + 5).wrapping_add(rel as i64 as usize);
+            if tgt < base || tgt >= end {
+                hits.push((src, tgt));
+            }
+        }
+    });
+
+    hits.sort_unstable();
+    hits.dedup();
+    if hits.is_empty() {
+        println!("  no out-of-module E9 jumps found");
+        return;
+    }
+    println!("-- {} out-of-module E9 jump(s) (detour entry candidates) --", hits.len());
+    for (src, tgt) in hits.iter().take(80) {
+        println!("  {}  ->  {}", describe(*src, modules), describe(*tgt, modules));
+    }
+    if hits.len() > 80 {
+        println!("  ... and {} more", hits.len() - 80);
+    }
+}
+
 fn run_callers(process: HANDLE, modules: &[ModuleInfo], target: usize) {
     println!("== protossl-scan : callers of 0x{target:X} ==");
     println!("({})\n", describe(target, modules));