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Fix dead links

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Philipp Oppermann
2020-02-17 12:55:40 +01:00
parent f21bef93b1
commit 65da18d143
24 changed files with 57 additions and 42 deletions
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blog/content/second-edition/posts/05-cpu-exceptions/index.md
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@@ -325,7 +325,7 @@ pub fn init_idt() {
However, there is a problem: Statics are immutable, so we can't modify the breakpoint entry from our `init` function. We could solve this problem by using a [`static mut`]:
[`static mut`]: https://doc.rust-lang.org/book/second-edition/ch19-01-unsafe-rust.html#accessing-or-modifying-a-mutable-static-variable
[`static mut`]: https://doc.rust-lang.org/1.30.0/book/second-edition/ch19-01-unsafe-rust.html#accessing-or-modifying-a-mutable-static-variable
```rust
static mut IDT: InterruptDescriptorTable = InterruptDescriptorTable::new();
@@ -340,7 +340,7 @@ pub fn init_idt() {
This variant compiles without errors but it's far from idiomatic. `static mut`s are very prone to data races, so we need an [`unsafe` block] on each access.
[`unsafe` block]: https://doc.rust-lang.org/book/second-edition/ch19-01-unsafe-rust.html#unsafe-superpowers
[`unsafe` block]: https://doc.rust-lang.org/1.30.0/book/second-edition/ch19-01-unsafe-rust.html#unsafe-superpowers
#### Lazy Statics to the Rescue
Fortunately the `lazy_static` macro exists. Instead of evaluating a `static` at compile time, the macro performs the initialization when the `static` is referenced the first time. Thus, we can do almost everything in the initialization block and are even able to read runtime values.