23 lines
641 B
Rust
23 lines
641 B
Rust
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// compile-flags: -C relocation-model=pie
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// only-x86_64-unknown-linux-gnu
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#![crate_type = "rlib"]
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// With PIE we know local functions cannot be interpositioned, we can mark them
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// as dso_local.
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// CHECK: define dso_local i8 @call_foreign_fn()
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#[no_mangle]
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pub fn call_foreign_fn() -> u8 {
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unsafe {
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foreign_fn()
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}
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}
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// External functions are still marked as non-dso_local, since we don't know if the symbol
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// is defined in the binary or in the shared library.
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// CHECK: declare zeroext i8 @foreign_fn()
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extern "C" {fn foreign_fn() -> u8;}
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// CHECK: !{i32 7, !"PIC Level", i32 2}
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// CHECK: !{i32 7, !"PIE Level", i32 2}
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