unstable book: in a sanitizer example, check the code · rust-lang/rust@b00b6a8 (original) (raw)
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- src/doc/unstable-book/src/compiler-flags
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -244,36 +244,36 @@ See the [Clang ControlFlowIntegrity documentation][clang-cfi] for more details. | ||
| 244 | 244 | |
| 245 | 245 | ## Example 1: Redirecting control flow using an indirect branch/call to an invalid destination |
| 246 | 246 | |
| 247 | -```rust,ignore (making doc tests pass cross-platform is hard) | |
| 247 | +```rust | |
| 248 | 248 | #![feature(naked_functions)] |
| 249 | 249 | |
| 250 | -use std::arch::asm; | |
| 250 | +use std::arch::naked_asm; | |
| 251 | 251 | use std::mem; |
| 252 | 252 | |
| 253 | 253 | fn add_one(x: i32) -> i32 { |
| 254 | 254 | x + 1 |
| 255 | 255 | } |
| 256 | 256 | |
| 257 | +# #[cfg(not(target_arch = "x86_64"))] pub extern "C" fn add_two(_: i32) {} | |
| 258 | + | |
| 257 | 259 | #[naked] |
| 260 | +# #[cfg(target_arch = "x86_64")] | |
| 258 | 261 | pub extern "C" fn add_two(x: i32) { |
| 259 | 262 | // x + 2 preceded by a landing pad/nop block |
| 260 | 263 | unsafe { |
| 261 | - asm!( | |
| 262 | -" | |
| 263 | - nop | |
| 264 | - nop | |
| 265 | - nop | |
| 266 | - nop | |
| 267 | - nop | |
| 268 | - nop | |
| 269 | - nop | |
| 270 | - nop | |
| 271 | - nop | |
| 272 | - lea eax, [rdi+2] | |
| 273 | - ret | |
| 274 | - ", | |
| 275 | - options(noreturn) | |
| 276 | - ); | |
| 264 | + naked_asm!( | |
| 265 | +"nop", | |
| 266 | +"nop", | |
| 267 | +"nop", | |
| 268 | +"nop", | |
| 269 | +"nop", | |
| 270 | +"nop", | |
| 271 | +"nop", | |
| 272 | +"nop", | |
| 273 | +"nop", | |
| 274 | +"lea eax, [rdi+2]", | |
| 275 | +"ret", | |
| 276 | + ) | |
| 277 | 277 | } |
| 278 | 278 | } |
| 279 | 279 |