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# Specification of NeKernel's PEF ABI.
The PEF ABI has multiple versions depending on the ISA.
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# 0: General Information (ISA agnostic)
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- Arguments goes from a0 to max argument register of ISA.
- SIMD arguments uses SIMD registers.
- The ABI is stack based, rbp is preserved.
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# 0: General Information (x64)
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- RBP is saved.
- SIMD is saved.
===================================
# 0: General Information (ARM64)
===================================
- BP is saved.
- SIMD is saved.
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