Add `kernel-address` sanitizer support for freestanding targets
This PR adds support for KASan (kernel address sanitizer) instrumentation in freestanding targets. I included the minimal set of `x86_64-unknown-none`, `riscv64{imac, gc}-unknown-none-elf`, and `aarch64-unknown-none` but there's likely other targets it can be added to. (`linux_kernel_base.rs`?) KASan uses the address sanitizer attributes but has the `CompileKernel` parameter set to `true` in the pass creation.
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| .. | ||
| back | ||
| coverageinfo | ||
| debuginfo | ||
| mir | ||
| traits | ||
| base.rs | ||
| codegen_attrs.rs | ||
| common.rs | ||
| errors.rs | ||
| glue.rs | ||
| lib.rs | ||
| meth.rs | ||
| mono_item.rs | ||
| target_features.rs | ||