tests/assembly/pie-relocation-model.rs

   1 // revisions: x64
   2 // assembly-output: emit-asm
   3 // [x64] compile-flags: --target x86_64-unknown-linux-gnu -Crelocation-model=pie
   4 // [x64] needs-llvm-components: x86
   5
   6
   7 #![feature(no_core, lang_items)]
   8 #![no_core]
   9 #![crate_type="rlib"]
  10
  11 #[lang = "sized"]
  12 trait Sized {}
  13 #[lang = "copy"]
  14 trait Copy {}
  15
  16 // CHECK-LABEL: call_other_fn:
  17 // With PIE local functions are called "directly".
  18 // CHECK:       {{(jmp|callq)}} other_fn
  19 #[no_mangle]
  20 pub fn call_other_fn() -> u8 {
  21     unsafe {
  22         other_fn()
  23     }
  24 }
  25
  26 // CHECK-LABEL: other_fn:
  27 // External functions are still called through GOT, since we don't know if the symbol
  28 // is defined in the binary or in the shared library.
  29 // CHECK:       callq *foreign_fn@GOTPCREL(%rip)
  30 #[no_mangle]
  31 #[inline(never)]
  32 pub fn other_fn() -> u8 {
  33     unsafe {
  34         foreign_fn()
  35     }
  36 }
  37
  38 extern "C" {fn foreign_fn() -> u8;}