Let's find out how Apache #NuttX RTOS boots on #PinePhone @PINE64 ... Visualised with Unicorn Emulator and #RustLang

Article: https://lupyuen.github.io/articles/unicorn2?1

Here's how we emulate Apache #NuttX RTOS with #UnicornEngine and #RustLang ... We'll use this to generate the Call Graph

Article: https://lupyuen.github.io/articles/unicorn2?2#intercept-code-execution-in-unicorn

#UnicornEngine is based on QEMU Emulator ... And lets us intercept the emulated code with #RustLang

Article: https://lupyuen.github.io/articles/unicorn2?2#intercept-code-execution-in-unicorn

Converting a Code Address to the Function Name? Use the DWARF Debug Symbols in the ELF File

Article: https://lupyuen.github.io/articles/unicorn2?3#map-address-to-function

To lookup the DWARF Debug Symbols in an ELF File ... Call the #RustLang Crates "addr2line" and "gimli"

Article: https://lupyuen.github.io/articles/unicorn2?4#dwarf-debug-symbols

Let's generate a clickable Call Graph for Apache #NuttX RTOS ... With a text-based Mermaid Flowchart

Article: https://lupyuen.github.io/articles/unicorn2?5#clickable-mermaid-flowchart

Adding a Hook Function to Unicorn Emulator ... To print the Mermaid Flowchart and Call Graph

Article: https://lupyuen.github.io/articles/unicorn2?6#generate-call-graph

Here's how Apache #NuttX RTOS boots on #PinePhone ... Thanks to our Call Graph

Article: https://lupyuen.github.io/articles/unicorn2?7#pinephone-boots-nuttx

Here are the System Drivers started by Apache #NuttX RTOS when it boots

Article: https://lupyuen.github.io/articles/unicorn2?8#pinephone-continues-booting-nuttx

Troubleshooting an Arm64 Memory Mgmt Fault in Apache #NuttX RTOS ... Here's what the Call Graph tells us

Article: https://lupyuen.github.io/articles/unicorn2?9#arm64-memory-management-fault