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`library/std/src/sys/sgx/abi/usercalls/alloc.rs` nicer
- Use `.addr()` instead of `as`-cast
- Use `add` instead of `offset` and remove some `as isize` casts by doing that
- Remove some casts
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Use pointer `is_aligned*` methods
This PR replaces some manual alignment checks with calls to `pointer::{is_aligned, is_aligned_to}` and removes a useless pointer cast.
r? `@scottmcm`
_split off from #100746_
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Replace most uses of `pointer::offset` with `add` and `sub`
As PR title says, it replaces `pointer::offset` in compiler and standard library with `pointer::add` and `pointer::sub`. This generally makes code cleaner, easier to grasp and removes (or, well, hides) integer casts.
This is generally trivially correct, `.offset(-constant)` is just `.sub(constant)`, `.offset(usized as isize)` is just `.add(usized)`, etc. However in some cases we need to be careful with signs of things.
r? ````@scottmcm````
_split off from #100746_
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r=Mark-Simulacrum
Update fortanix-sgx-abi and export some useful SGX usercall traits
Update `fortanix-sgx-abi` to 0.5.0 to add support for cancel queue (see https://github.com/fortanix/rust-sgx/pull/405 and https://github.com/fortanix/rust-sgx/pull/404).
Export some useful traits for processing SGX usercall. This is needed for https://github.com/fortanix/rust-sgx/pull/404 to avoid duplication.
cc `@raoulstrackx` and `@jethrogb`
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In order to mitigate the Stale Data Read for xAPIC vulnerability completely, reading userspace from an SGX enclave must be aligned and in 8-bytes chunks.
References:
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00657.html
- https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/advisory-guidance/stale-data-read-from-xapic.html
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Update fortanix-sgx-abi to 0.5.0 to add support for cancel queue (see
https://github.com/fortanix/rust-sgx/pull/405 and
https://github.com/fortanix/rust-sgx/pull/404).
Export some useful traits for processing SGX usercall. This is needed
for https://github.com/fortanix/rust-sgx/pull/404 to avoid duplication.
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Intel Security Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00615.html
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This updates the standard library's documentation to use the new syntax. The
documentation is worthwhile to update as it should be more idiomatic
(particularly for features like this, which are nice for users to get acquainted
with). The general codebase is likely more hassle than benefit to update: it'll
hurt git blame, and generally updates can be done by folks updating the code if
(and when) that makes things more readable with the new format.
A few places in the compiler and library code are updated (mostly just due to
already having been done when this commit was first authored).
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Run `./x.py` fmt
Add reference link
Fix reference link
Apply review suggestions.
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