Commit Graph

7 Commits

Author SHA1 Message Date
Lephenixnoir c5a7071dcc better manage exceptions and instruction-level passes 2020-02-28 16:19:50 +01:00
Lephenixnoir 5178a489be
add disassembly from arbitrary file
Also changes the naked pointer of the Buffer object to a shared_ptr.
Still learning how to use this thing, but I'll manage eventually.
2020-02-16 21:45:16 +01:00
Lephenixnoir d5c5fa6aeb
implement the syscall pass, and symbol resolution
New features:
* The syscall pass now resolves syscalls for the input target, provided
  that an OS is mapped on the ROM region.
* Formalized the variations of print's arguments as a sequence (tree, to
  be precise) of /promotions/.
* Added a short notion of Symbol and SymbolTable, and a loader for them.
  Data files of type "symbol" are read as such and provide name to
  syscalls or arbitrary addresses.

Code changes:
* The disassembly operation of the command-line interface is now finally
  in its own file with more room.
* Encoded the tree structure of promotions as a sequence of (mainly
  tail-calling) inter-calling methods in the print pass.
2020-02-15 18:42:14 +01:00
Lephenixnoir 4d9edecad9
start with the analysis passes
-> The cfg pass loads the function into memory, annotates leaders and
   jumps, and resolves delay slots.
-> The pcrel pass currently computes locations for pc-relative moves and
   jumps, but does not yet compute the pc-relative moved data.
-> The print pass displays the results of analysis with various layout
   and formatting options.
2020-02-12 07:53:00 +01:00
Lephenixnoir 468495856d
implement more of the meat of the tool
* Separate OS and Target conceptually; now an OS is created on an
  existing target which must have ROM bound.
* Add a configuration file with a data library and description files
  which are automatically loaded at startup.
* As a first application, implement target descriptions. It is now
  possible (given the proper library) to type [fxos info fx@3.10] to get
  information on the fx OS version 3.10.
* Set up the pass infrastructure and the first few easy passes. This
  is still a Work In Progress and not yet called from the command-line.
* Improve the copy/move behavior of classes (C++ concerns).
* Add instruction metadata, which will make it easier to write actual
  useful analysis passes.
2019-12-28 17:18:13 +01:00
Lephenixnoir c9ecb855de
finish the base interfaces
* switch from File to Buffer to manage file contents
* boilerplate for a proprer command-line interface, and complete help
* add a notion of Addressable to avoid losing the source address of very
  information provided by the OS type
* use addressables in the AbstractMemory interface
* fully parse the header and footer of OSes
* bring [fxos info] to the level of the previous implementation
* make most of the OS attributes public
* use char* instead of void* for translation, since void* arithmetic
  triggers a hell of warnings in C++
2019-12-15 18:40:05 +01:00
Lephenixnoir d78f7bca10 initial system: instruction load, target creation
Contains basic stuff to start working:

* Loading files and assembly instruction descriptions
* Create a 64k-entry assembly decoding table
* Standard memory regions and information
* Create targets where files can be mapped at any addresses
* Load OSes and detect a few basic things
2019-12-14 22:33:57 +01:00