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Kevin Thomas
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WEEK02/WEEK02-01.md
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# Embedded Systems Reverse Engineering
# Embedded Systems Reverse Engineering
[Repository](https://github.com/mytechnotalent/Embedded-Hacking)
## Week 2
Hello, World - Debugging and Hacking Basics: Debugging and Hacking a Basic Program for the Pico 2
### Exercise 1: Change the Message
### Non-Credit Practice Exercise 1: Change the Message
#### Objective
Write your own message into SRAM and redirect `r0` so the running program prints it without changing the source code.
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- OpenOCD and `arm-none-eabi-gdb` available in your PATH
- Serial monitor (PuTTY/minicom/screen) set to 115200 baud
- `build\0x0001_hello-world.elf` present and flashed to the board
- Week 2 setup steps (0a–0e) completed: OpenOCD, serial monitor, and GDB ready
- Week 2 setup steps (0a–0e) completed: OpenOCD, serial monitor, and GDB ready
#### Task Description
You will create a custom string in SRAM at `0x20000000`, point `r0` at it just before `puts()` runs, and watch the live output change to your message.