fix spelling

This commit is contained in:
Torsten Ruger 2014-08-28 22:32:53 +03:00
parent 35b738639b
commit 99b4468599
6 changed files with 32 additions and 22 deletions

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@ -54,12 +54,12 @@ The objects the machine works on are:
and working on means, these are the only objects which the machine accesses. Ie all others would have to be moved first. and working on means, these are the only objects which the machine accesses. Ie all others would have to be moved first.
When a Method needs to make a call, or send a message, it creates a new Message object. When a Method needs to make a call, or send a Message, it creates a NewMessage object.
Messages contain return addresses and arguemnts. Messages contain return addresses and arguments.
Then the machine must find the method to call. This is a function of the virtual machine an is implemented in ruby. Then the machine must find the method to call. This is a function of the virtual machine and is implemented in ruby.
Then a new Method receives the message, creates a Frame for local and temporary variables and continues execution. Then a new Method receives the Message, creates a Frame for local and temporary variables and continues execution.
The important thing here is that Messages and Frames are normal objects. The important thing here is that Messages and Frames are normal objects.
@ -67,8 +67,9 @@ And interestingly we can partly use ruby to find the method, so in a way it is n
Instead the sending goes back up and then down again. Instead the sending goes back up and then down again.
The Message object is the second parameter to the compile method, the run-time part as it were. Why? Since it only The Message object is the second parameter to the compile method, the run-time part as it were. Why? Since it only
exists at runtime: to make compile time analysis possible. Especially for those times when we can resolve the method exists at runtime: to make compile time analysis possible (it is after all the Virtual version, not Parfait. ie
at compile time. (Which is for all vm code) compile-time, not run-time). Especially for those times when we can resolve the method
at compile time.
* *

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@ -9,7 +9,7 @@ These functions return their code, ie a Virtual::CompiledMethod object, which ca
as if it were a "normal" function. as if it were a "normal" function.
A normal ruby function is one that is parsed and transformed to code. But not all functionality can be written in ruby, A normal ruby function is one that is parsed and transformed to code. But not all functionality can be written in ruby,
one of those chicken and egg things. C uses Assembler in this situation, we use Kernel function. one of those chicken and egg things. C uses Assembler in this situation, we use Builtin functions.
Slightly more here : http://salama.github.io/2014/06/10/more-clarity.html (then still called Kernel) Slightly more here : http://salama.github.io/2014/06/10/more-clarity.html (then still called Kernel)

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@ -1,7 +1,8 @@
Minimal elf support Minimal elf support
=================== ===================
This is really minnimal and works only for our current use case This is really minimal and works only for our current use case
- no external functions (all syscalls) - no external functions (all syscalls)
- only position independant code (no relocation) - only position independant code (no relocation)
- embedded data (into text), no data section - embedded data (into text), no data section

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@ -1,4 +1,6 @@
### A thin layer ### Parfait: a thin layer
(not everbody likes onion)
Here we have a placeholder for things i am currently developing. Here we have a placeholder for things i am currently developing.
@ -15,7 +17,8 @@ not
compile - time compile - time
always mixing those up: As such it is not loaded at compile time. always mixing those up: As such it is not loaded at compile time. On the other hand, we need to create data
at compile time that matches the expectation of the code we create..
A step back: the code (program) we compile runs at run - time. A step back: the code (program) we compile runs at run - time.
And so does parfait. So all we have to do is compile it with the program. And so does parfait. So all we have to do is compile it with the program.

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@ -3,7 +3,7 @@ Register Machine
This is the logic that uses the compiled virtual object space to produce code and an executable binary. This is the logic that uses the compiled virtual object space to produce code and an executable binary.
There is a mechanism for an actual machine (derived class) to generate machine specific instructions (as the There is a mechanism for an actual machine (derived class) to generate harware specific instructions (as the
plain ones in this directory don't assemble to binary). Currently there is only the Arm module to actually do plain ones in this directory don't assemble to binary). Currently there is only the Arm module to actually do
that. that.
@ -23,7 +23,7 @@ There are four virtual objects that are accessible (we can access their variable
- Frame (local and tmp variables) - Frame (local and tmp variables)
- NewMessage ( to build the next message sent) - NewMessage ( to build the next message sent)
These are pretty much the first four registers. When the code goes from virtual to register, we use register instrucitons These are pretty much the first four registers. When the code goes from virtual to register, we use register instructions
to replace virtual ones. to replace virtual ones.
Eg: A Virtual::Set can move data around inside those objects. And since in Arm this can not be done in one instruciton, Eg: A Virtual::Set can move data around inside those objects. And since in Arm this can not be done in one instruciton,
@ -31,7 +31,7 @@ we use two, one to move to an unused register and then into the destination. And
to shift the type info. to shift the type info.
Another simple example is a Call. A simple case of a Class function call resolves the class object, and with the Another simple example is a Call. A simple case of a Class function call resolves the class object, and with the
method name the function to be called at compile-time. And so this results in a Register::Call, which is an Arm method name the function to be found at compile-time. And so this results in a Register::Call, which is an Arm
instruction. instruction.
A C call A C call

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@ -5,13 +5,14 @@ This is really an OV (object value) not object oriented machine.
Integers and References are Values. We make them look like objects, sure, but they are not. Integers and References are Values. We make them look like objects, sure, but they are not.
Symbols have similar properties and those are: Symbols have similar properties and those are:
- eqality means identity - equality means identity
- no chhange over lifetime - no change over lifetime
It's like with Atoms: they used to be the smallest possible physical unit. Now we have electrons, proton and neutrons. It's like with Atoms: they used to be the smallest possible physical unit. Now we have electrons, proton and neutrons.
And so objects are made up of Values (not objects), integers, floats , references and possibly more. And so objects are made up of Values (not objects), integers, floats , references and possibly more.
Values have type in the same way objects have a class. We keep track of the type at runtime. Values have type in the same way objects have a class. We keep track of the type of a value at runtime, also in an
similar way that objects have their classes at runtime.
### Layers ### Layers
@ -21,12 +22,15 @@ comile the ast layer into Virtual:: objects
The main objects are BootSpace (lots of objects), BootClass (represents a class), The main objects are BootSpace (lots of objects), BootClass (represents a class),
CompiledMethod (with Blocks and Instruction). CompiledMethod (with Blocks and Instruction).
*Virtual* Instructions get further transformed into *register* instructions. This is done by an abstractly defined **Virtual** Instructions get further transformed into **register** instructions. This is done by an abstractly defined
Register Machine with basic Intructions. A concrete implementation (like Arm) derives and creates derived Register Machine with basic Intructions. A concrete implementation (like Arm) derives and creates derived
Instructions. Instructions.
The transformation is implemented as **passes** to make it easier to understand what is going on. Also this makes it
easier to add functionality and optimisations from external (to the gem) sources.
The final transformation assigns Positions to all boot objects (Linker) and assembles them into a binary representation. The final transformation assigns Positions to all boot objects (Linker) and assembles them into a binary representation.
The data- part is then a representation of classes in the *parfait* runtime. And the instrucions make up the The data- part is then a representation of classes in the **parfait** runtime. And the instrucions make up the
funtions. funtions.
### Accessible Objects ### Accessible Objects
@ -46,9 +50,10 @@ The micro-kernel idea is well stated by: If you can leave it out, do.
As such we are aiming for integer and reference (type) support, and a minimal class system As such we are aiming for integer and reference (type) support, and a minimal class system
(object/class/aray/hash/string). (object/class/aray/hash/string). It is possible to add types to the system in a similar way as we add classes,
and also implement very machine dependent functionality which nevertheless is fully wrapped as OO.
*Parfait* is that part of the runtime that can be coded in ruby. It is parsed, like any other code and always included **Parfait** is that part of the runtime that can be coded in ruby. It is parsed, like any other code and always included
in the resulting binary. Builtin is the part of the runtime that can not be coded in ruby (but is still needed). This in the resulting binary. **Builtin** is the part of the runtime that can not be coded in ruby (but is still needed). This
is coded y construction CompiledMethods in code and neccesarily machine dependant. is coded by construction CompiledMethods in code and neccesarily machine dependant.