Re:Android security in 2016 is a mess
by kps on Tuesday November 29, 2016 @05:08PM
(#13066663)
As wtallis said: Cortex-M executes only Thumb instructions, while pre-ARM7TDMI don't execute Thumb instructions.
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Cortex-A, Cortex-M, Cortex-R have different targets, ISA, System organization as far back as their origination. Not sure why you'd compare them, I was obviously talking about processors within the same segment, Cortex-R7 is backwards compatible with previous versions, Cortex-A72 is backwards compatible with previous versions, Cortex-M3 is backwards compatible with previous versions.