* docs(raw-binary): replace the STM32-style ARM example
The headline raw example opened ecu.bin at 0x8000000, an STM32 flash
address, while the arm lane decodes in ARM state. Map a 32-bit ARM-state
image at 0x8000 instead, and state beside the example that Thumb-only
images, including Cortex-M firmware, are not supported.
* docs(ghidra): document an interim Cortex-M language override
Ghidra imports little-endian ARM ELF files as ARM:LE:32:v8, which
defaults to ARM state and marks Thumb code only from $t mapping symbols
and odd function-symbol addresses. Unpinned arm ELF already admits
REA_GHIDRA_LANGUAGE_ID, so document ARM:LE:32:Cortex (ARMv6-M, ARMv7-M,
ARMv7E-M) and ARM:LE:32:v8-m (ARMv8-M) as an unverified interim.
State the override's full effect while it is set: raw-binary, DOS, DOL,
PSP and language-pinned lanes such as RISC-V refuse it, and REA asks
Ghidra to import every other target in the ARM language, because it does
not check the override's processor against the target.
Entrpi
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