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Spec update

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Erin 2023-08-07 01:43:29 +02:00
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spec.md
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@ -261,13 +261,13 @@
# Memory # Memory
- Addresses are 64 bit - Addresses are 64 bit
- Program should be in the same address space as all other data - Program should be in the same address space as all other data
- Address `0x0` is invalid and acessing it traps
- Memory implementation is arbitrary - Memory implementation is arbitrary
- In case of accessing invalid address: - In case of accessing invalid address:
- Program shall trap (LoadAccessEx, StoreAccessEx) with parameter of accessed address - Program shall trap (LoadAccessEx, StoreAccessEx) with parameter of accessed address
- Value of register when trapped is undefined - Value of register when trapped is undefined
## Recommendations ## Recommendations
- Leave address `0x0` as invalid
- If paging used: - If paging used:
- Leave first page invalid - Leave first page invalid
- Pages should be at least 4 KiB - Pages should be at least 4 KiB