CODEWITHSUNDEEP
assemblyx86bare-metal
Pocokman
Pocokman

Reputation: 719

XSetgv crashes in my bare metal software

I am developing a bare metal program. The platform is x86, 32 bit, protected mode, I am at ring 0. I would like to enable AVX by using xsetgv instruction. 18th bit of CR4 is 1, if I use xgetgv then nothing wrong happens, but the xsetgv crashes (the virtualbox reports fatal error). The problematic code is the following:

mov ecx, 0
mov eax, 0x7
mov edx, 0
xsetbv

What is the problem?

Upvotes: 0

Views: 77

Answers (1)

Pocokman
Pocokman

Reputation: 719

The problem was the bugy virtual box, my code works greatly on a real hardware, and the newest virtualbox.

Upvotes: 2

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