Fix parsing the PLT on Windows (#2445)

* Fix parsing the PLT on Windows

The Unicorn Engine 1GB workaround doesn't work since `mmap` has different semantics on Windows.

* Update CHANGELOG

* Catch ImportError instead

* Remove unused sys import

Author: peace-maker

CHANGELOG.md

@@ -118,6 +118,12 @@ The table below shows which release corresponds to each branch, and what date th
 [2435]: https://github.com/Gallopsled/pwntools/pull/2435
 [2437]: https://github.com/Gallopsled/pwntools/pull/2437
 
+## 4.13.1
+
+- [#2445][2445] Fix parsing the PLT on Windows
+
+[2445]: https://github.com/Gallopsled/pwntools/pull/2445
+
 ## 4.13.0 (`stable`)
 
 - [#2242][2242] Term module revamp: activating special handling of terminal only when necessary

pwnlib/elf/plt.py

@@ -70,6 +70,9 @@ def __ensure_memory_to_run_unicorn():
         mm.close()
     except OSError:
         raise OSError("Cannot allocate 1GB memory to run Unicorn Engine")
+    except ImportError:
+        # Can only mmap files on Windows, would need to use VirtualAlloc.
+        pass
 
 
 def prepare_unicorn_and_context(elf, got, address, data):