tests/assembly/x86_64-fortanix-unknown-sgx-lvi-inline-assembly.rs

   1 // Test LVI load hardening on SGX inline assembly code
   2
   3 // assembly-output: emit-asm
   4 // compile-flags: --crate-type staticlib
   5 // only-x86_64-fortanix-unknown-sgx
   6
   7 use std::arch::asm;
   8
   9 #[no_mangle]
  10 pub extern "C" fn get(ptr: *const u64) -> u64 {
  11     let value: u64;
  12     unsafe {
  13         asm!(".start_inline_asm:",
  14             "mov {}, [{}]",
  15             ".end_inline_asm:",
  16             out(reg) value,
  17             in(reg) ptr);
  18     }
  19     value
  20 }
  21
  22 // CHECK: get
  23 // CHECK: .start_inline_asm
  24 // CHECK-NEXT: movq
  25 // CHECK-NEXT: lfence
  26 // CHECK-NEXT: .end_inline_asm
  27
  28 #[no_mangle]
  29 pub extern "C" fn myret() {
  30     unsafe {
  31         asm!(
  32             ".start_myret_inline_asm:",
  33             "ret",
  34             ".end_myret_inline_asm:",
  35         );
  36     }
  37 }
  38
  39 // CHECK: myret
  40 // CHECK: .start_myret_inline_asm
  41 // CHECK-NEXT: shlq $0, (%rsp)
  42 // CHECK-NEXT: lfence
  43 // CHECK-NEXT: retq