loading: say how to read a headerless blob (processor, base)

A raw firmware dump has no format to detect, so IDA fell back to x86 at address
0. It doesn't fail — it opens, analyses, and finds nothing. An AArch64 image
loaded this way gave 0 functions; told the truth it gives 35.

    ida-tui fw.bin --processor arm --base 0x8000000

and per binary in a project, which is what a multi-image firmware actually
needs:

    {"path": "app.bin", "processor": "arm", "base": "0x8000000"}

idapro.open_database() already accepted IDA command-line switches; nothing was
passing any. Plumbed BinaryRef -> WorkerPool -> WorkerClient -> worker argv, plus
a load_args for the single-binary path that has no project ref.

base is written the way people say it (0x8000000, int or string, any base).
IDA's -b is in PARAGRAPHS — -b1000 loads at 0x10000 — so BinaryRef.load_args
converts, and a base that isn't 16-byte aligned is refused rather than silently
landing 16x off. ida_args passes anything else through.

Two bugs found by testing the whole path rather than the happy one:

* Project.load() whitelisted path/label when normalising entries, so the load
  options were dropped the first time a project was reopened — set a processor,
  come back tomorrow, it's gone.
* Re-passing the switches to an EXISTING database makes IDA refuse the open
  (rc != 0, no functions). The .i64 already records how the image was loaded, so
  the worker skips them once a database exists. My first guard checked
  splitext(path) + ".i64" and never fired, because IDA names it "<file>.i64" —
  keeping the extension. It checks both spellings now.

Verified on a real AArch64 blob: fresh load 35 functions based at 0x8002440,
reopen 35 again, and the CLI rejects an unaligned or non-numeric --base.

tests: +6 project (options recorded, paragraph conversion, file round-trip,
add() takes them, an ELF passes nothing, hex-string base). 39/0 project, 195/0
scenarios, 30/0 project UI, 36/0 index, 27/0 pool.

1 files changed, 6 insertions, 2 deletions

diff --git a/idatui/worker_client.py b/idatui/worker_client.py
index 586ff21..79a6db9 100644
--- a/idatui/worker_client.py
+++ b/idatui/worker_client.py
@@ -71,8 +71,9 @@ class _NoopKeepAlive:
 
 class WorkerClient:
     def __init__(self, binary_path: str, *, ttl: int = 0,
-                 python: str | None = None) -> None:
+                 python: str | None = None, load_args: str = "") -> None:
         self._bin = os.path.abspath(os.path.expanduser(binary_path))
+        self._load_args = load_args or ""   # IDA switches for a headerless blob
         self._python = python or _find_worker_python()
         tag = f"{os.getpid()}-{uuid.uuid4().hex[:8]}"
         self._sock_path = f"/tmp/idatui-worker-{tag}.sock"
@@ -93,8 +94,11 @@ class WorkerClient:
                 # run worker.py as a SCRIPT (not -m idatui.worker) so we don't
                 # import the textual-dependent idatui package __init__ under the
                 # IDA python, which usually has no textual.
+                argv = [self._python, _WORKER_PY, self._sock_path, self._bin]
+                if self._load_args:
+                    argv.append(self._load_args)
                 self._proc = subprocess.Popen(
-                    [self._python, _WORKER_PY, self._sock_path, self._bin],
+                    argv,
                     stdout=open(self._log_path, "wb"),
                     stderr=subprocess.STDOUT, stdin=subprocess.DEVNULL,
                 )