feat(protossl-scan): accept module+offset targets for disasm/xref

Add `module+0xoffset` addressing (e.g. `anadius64.dll+0x2BB90`) to the
disasm and xref commands. Offsets are stable across launches while the
base is ASLR'd, so this resolves the module's current base in the running
process instead of requiring a stale absolute address each session.

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

tools/protossl-scan/src/main.rs

@@ -124,17 +124,25 @@ fn main() {
         // loads and call targets. Use this on a code anchor (e.g. the lea that
         // loads the "_ProtoSSLSendPacket" string) to read the real code.
         Some("disasm") => {
-            let target = match args.get(1).and_then(|s| parse_hex(s)) {
-                Some(t) => t,
+            let arg = match args.get(1) {
+                Some(a) => a.clone(),
                 None => {
-                    eprintln!("Usage: protossl-scan disasm <hex-addr> [pid|name]");
-                    eprintln!("Example: protossl-scan disasm 0x140EFA631");
+                    eprintln!("Usage: protossl-scan disasm <hex-addr | module+0xoffset> [pid|name]");
+                    eprintln!("Examples: protossl-scan disasm 0x140EFA631");
+                    eprintln!("          protossl-scan disasm anadius64.dll+0x2BB90");
                     std::process::exit(1);
                 }
             };
             let pid = resolve_pid(args.get(2).map(|s| s.as_str()));
             let process = open_for_read(pid);
             let modules = enumerate_modules(pid);
+            let target = match resolve_target(&arg, &modules) {
+                Some(t) => t,
+                None => {
+                    eprintln!("Could not resolve '{arg}' (unknown module or bad address)");
+                    std::process::exit(1);
+                }
+            };
             run_disasm(process, &modules, target);
             unsafe {
                 let _ = CloseHandle(process);
@@ -142,12 +150,11 @@ fn main() {
         }
         // xref <hex-addr> [pid|name]  (power-user form, exact absolute address)
         Some("xref") => {
-            let target = match args.get(1).and_then(|s| parse_hex(s)) {
-                Some(t) => t,
+            let arg = match args.get(1) {
+                Some(a) => a.clone(),
                 None => {
-                    eprintln!("Usage: protossl-scan xref <hex-addr> [pid|name]");
+                    eprintln!("Usage: protossl-scan xref <hex-addr | module+0xoffset> [pid|name]");
                     eprintln!("Example: protossl-scan xref 0x147D198B9");
-                    eprintln!("Tip: pass the FULL absolute address, not the +offset.");
                     eprintln!("Or just use: protossl-scan xref-str ProtoSSLSend");
                     std::process::exit(1);
                 }
@@ -155,6 +162,13 @@ fn main() {
             let pid = resolve_pid(args.get(2).map(|s| s.as_str()));
             let process = open_for_read(pid);
             let modules = enumerate_modules(pid);
+            let target = match resolve_target(&arg, &modules) {
+                Some(t) => t,
+                None => {
+                    eprintln!("Could not resolve '{arg}' (unknown module or bad address)");
+                    std::process::exit(1);
+                }
+            };
             run_xref(process, &modules, target);
             unsafe {
                 let _ = CloseHandle(process);
@@ -525,6 +539,26 @@ fn parse_hex(s: &str) -> Option<usize> {
     usize::from_str_radix(trimmed, 16).ok()
 }
 
+/// Resolve a target that is either a raw hex address or a `module+0xoffset`
+/// form (e.g. `anadius64.dll+0x2BB90`). The module form is ASLR-robust: it adds
+/// the offset to the module's CURRENT base in the running process.
+fn resolve_target(s: &str, modules: &[ModuleInfo]) -> Option<usize> {
+    if let Some(idx) = s.find('+') {
+        let name = s[..idx].trim().to_ascii_lowercase();
+        let want = name.strip_suffix(".dll").unwrap_or(&name);
+        let off = parse_hex(s[idx + 1..].trim())?;
+        for m in modules {
+            let mn = m.name.to_ascii_lowercase();
+            let mn = mn.strip_suffix(".dll").unwrap_or(&mn);
+            if mn == want {
+                return Some(m.base + off);
+            }
+        }
+        return None;
+    }
+    parse_hex(s)
+}
+
 /// Read a single u64 from the target process at `addr`. Returns None if the
 /// memory can't be read (e.g. unmapped).
 fn read_u64(process: HANDLE, addr: usize) -> Option<u64> {