cranelift_codegen/ir/
known_symbol.rs

1use core::fmt;
2use core::str::FromStr;
3#[cfg(feature = "enable-serde")]
4use serde_derive::{Deserialize, Serialize};
5
6/// A well-known symbol.
7#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
8#[cfg_attr(feature = "enable-serde", derive(Serialize, Deserialize))]
9pub enum KnownSymbol {
10    /// ELF well-known linker symbol _GLOBAL_OFFSET_TABLE_
11    ElfGlobalOffsetTable,
12    /// TLS index symbol for the current thread.
13    /// Used in COFF/PE file formats.
14    CoffTlsIndex,
15}
16
17impl fmt::Display for KnownSymbol {
18    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
19        fmt::Debug::fmt(self, f)
20    }
21}
22
23impl FromStr for KnownSymbol {
24    type Err = ();
25
26    fn from_str(s: &str) -> Result<Self, Self::Err> {
27        match s {
28            "ElfGlobalOffsetTable" => Ok(Self::ElfGlobalOffsetTable),
29            "CoffTlsIndex" => Ok(Self::CoffTlsIndex),
30            _ => Err(()),
31        }
32    }
33}
34
35#[cfg(test)]
36mod tests {
37    use super::*;
38
39    #[test]
40    fn parsing() {
41        assert_eq!(
42            "ElfGlobalOffsetTable".parse(),
43            Ok(KnownSymbol::ElfGlobalOffsetTable)
44        );
45        assert_eq!("CoffTlsIndex".parse(), Ok(KnownSymbol::CoffTlsIndex));
46    }
47}
cranelift_codegen/ir/known_symbol.rs

cranelift_codegen/ir/
known_symbol.rs
