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30 lines
1.2 KiB
Markdown
30 lines
1.2 KiB
Markdown
# stmos
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stmos is an operating system for STM microprocessors. It aims to support (or be able to support) all STM Cortex-M processors.
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Features:
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* Unprivileged code execution
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* ELF loading and execution (loads an init from the initrd)
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* Near-full C standard library support for loaded ELFs
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* libgpio: GPIO access for loaded ELFs
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Currently supported processors:
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* STM32L476RG (board: NUCLEO-L476RG)
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### building
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To build stmos, you'll need the following programs:
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* The arm-stmos toolchain (see the ```arm-stmos``` folder)
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* openocd
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* gdb (with multiarch support)
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To compile stmos simply run ```make``` (-j option supported). To upload, use ```run.sh``` to start openocd/gdb; do ```lo``` to load stmos, and ```c``` to run it.
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### notes
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Only the initrd works right now in regards to filesystem access. Files in the folder ```src/initrd/files``` are put into the initrd. C source files in ```src/initrd``` are compiled with libgpio, placing the program in ```src/initrd/files```.
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What's next for stmos?
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* SD card support
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* Display support (ILI....)
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* Script program support (a shell like sash, maybe lua)
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* More ELF work (better execve, signals?, etc.)
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