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* Add the readrom binaryMiquel Sabaté Solà2024-12-181-1/+1
| | | | | | | | | | | | | | | The readrom binary is similar to `readelf` from Linux and it will allow to display information from an NES/Famicom ROM file. For now the information being shown is just the header, but in the future we might also include disassembling parts of the code, or retrieving the "CHARS" section for a given ROM file, and similar. In order to implement the header parsing part a new library has been introduced, simply named "header" which abstracts everything away so you just need to call `Header::try_from("my bytes")` to fetch the actual information. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* Update the README for open sourcing the projectMiquel Sabaté Solà2024-12-161-0/+1
| | | | Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* Fix the mapping of addresses on labelsMiquel Sabaté Solà2024-12-161-3/+3
| | | | | | | | | | | | | | | | | There was a big missunderstanding on how things were to be laid out in the end file, and so it was needed to create a proper understanding on what's a Mapping and what's a Segment. These turned out to be fundamental concepts that I failed to grok up until this commit. Hence, this commit re-arranges completely how variables and labels are stored in the Context, and how these objects can then be translated into bundles that can be spit out to the caller. This commit, besides introducing the new Mapping struct, also introduced a more general Object, which abstracts things from the Bundle struct, and allows us to pass certain metadata about the bundle at hand. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* nasm: Add a parameter for linker configurationMiquel Sabaté Solà2024-12-121-2/+22
| | | | Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* Don't rely on the identifier for control identityMiquel Sabaté Solà2024-12-121-2/+2
| | | | | | | | | Instead, use a new enum type to identify the control statements that we actually support. This way the assembler is more easily aware on the control that it's dealing with, and can be more sure on certain aspects of the implementation on control support. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* Adapt the assembler to the changes on the parserMiquel Sabaté Solà2024-12-121-4/+13
| | | | | | | | | | | As of 184c39579227 ("Re-work the parser from scratch") the parser has a proper AST, and the assembler has to traverse it accordingly. Moreover, the assembler has been stripped from a lot of unneeded memory allocations and it's overall more keen on using mere references when possible. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* Re-work the parser from scratchMiquel Sabaté Solà2024-12-121-16/+9
| | | | | | | | | | | | | The initial implementation was incredibly naive on how complex an assembler can actually be. Because of this, it never bothered to define and produce a proper AST, and hence it was overall extremely fragile on (not so) corner cases. This commit re-writes everything from scratch for the parser, and it should really be the last fundamental change to the parser other than minor additions/features here and there. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* Add support for proceduresMiquel Sabaté Solà2024-12-121-9/+2
| | | | | | | Procedures are marked with the '.proc' control statement and work both as a scoping mechanism and as a label that can be referenced. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* Add support for branchingMiquel Sabaté Solà2024-12-121-2/+2
| | | | | | | | This is a bare bones implementation of it, and there's a lot of nuance that it's being missed, but at least the fundamentals have been implemented already. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* Add the notion of mappingMiquel Sabaté Solà2024-12-122-1/+10
| | | | | | | Mappings and segments are fundamental blocks on how code is distributed both on the actual ROM File and in the memory layout. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
* Initial commitMiquel Sabaté Solà2024-12-122-0/+89
A lot is missing and there is a long road ahead to make the assembler even work. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>