Adding processor flash memory reading, viewing and writing to file.

[martian]

Reading memory works when the device is running either osimage or bootloader.

• New memory reading command in osimage and bootloader.
• Extended 'hw readmem' command with length parameter, file writing and hex viewer.
• Introduced '--dumpmem' option to proxmark3 executable to support dumping from bootloader.

Simple interactive examples:

• hw readmem -f flashdump
• hw readmem -l 1024

CLI example:

• ./pm3 --dumpmem flashdump.bin

Reading from arbitrary memory ranges can be unlocked using the 'raw' option.

[github-actions[bot]]

You are welcome to add an entry to the CHANGELOG.md as well

[iceman1001]

Interesting, a very nice PR. Clean code. I have only one issue, and that is we use fileutils.c to do all file operations. There is a long effort to unifiy/refactor all file operations into it.

Would you mind telling me what the use case for this? How and when will it be used?

[martian]

Thanks. I will have a look at the file operations.

My initial use case was an investigation into what happened with my somewhat-faulty chinese pm3 easy 512KB, where write errors occur in the top half of flash. Except when I overwrite with FF first, it turns out.

I thought being able to dump flash, or read any memory or HW register might come in useful for others in debugging firmware related issues.