User-mode console support #551
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The file-system syscalls PR is getting closer to being merged, so review on this can be started. |
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Implement the console_write() function which will take a u8 slice and write it to the console. This will be used to allow user-space code to write to the console. Signed-off-by: Joerg Roedel <[email protected]>
Define a setup function which is only called for user tasks. Signed-off-by: Joerg Roedel <[email protected]>
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Add a method to struct Task to add an object with a defined handle. Signed-off-by: Joerg Roedel <[email protected]>
Add a string to struct Task representing the name of the task. Signed-off-by: Joerg Roedel <[email protected]>
Use the file name of the binary as the name of the task. Signed-off-by: Joerg Roedel <[email protected]>
Add a file type for writing to the console. This will be wired up to user-space to allow modules to write messages to the console. Signed-off-by: Joerg Roedel <[email protected]>
Implement a function to open a console and return a file handle. Signed-off-by: Joerg Roedel <[email protected]>
Attach a handle to a console file to every user task, so that they can write to the console. Signed-off-by: Joerg Roedel <[email protected]>
Create a static FSObjHandle which is used to write to the console and a function to perform the writes. Signed-off-by: Joerg Roedel <[email protected]>
Add a simple SpinLock implementation to the user library to protect access to global state. At some point this needs to be replaces with a non-busy waiting locking implementation. Signed-off-by: Joerg Roedel <[email protected]>
Implement console access and provide the the print! and println! macros. Use the new macros to print a message in the panic handler. Signed-off-by: Joerg Roedel <[email protected]>
Use the console support to print a startup message from the init process. Signed-off-by: Joerg Roedel <[email protected]>
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vijaydhanraj
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Dec 13, 2024
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This PR implements console output support for user-mode processes. In user-mode code the
print!andprintln!macros can now be used to print messages to the SVSM console.It depends on PRs #539 and #548 and is here for testing and initial review.
I will keep it in draft state until the dependencies have been merged.