alt Hacker NewsI'm not sure this is a real problem - for embedded you know a priori - for arbitrary desktop/SBC machines, misa will be available in kernel mode and /proc/cpuinfo will be available in user mode.
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monocasa • today at 1:35 AM
Well, misa won't be in most cases since you'll be running ins mode rather than m mode for most kernels on an application core (and misa won't tell you about the X* and Z* extensions).
But you'll practically be passed a device tree from SBI that will tell you.
He actually explains this too. You only know at compile time what you're building for. For example with microblaze-V, I often tweak what ISA I'm generating. If I ran the same elf without thinking about it, who knows what could happen given the instruction collision problem