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use std::fmt;
use rustc_macros::HashStable_Generic;
#[cfg(test)]
mod tests;
#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, Debug)]
#[derive(HashStable_Generic, Encodable, Decodable)]
pub enum Abi {
// Some of the ABIs come first because every time we add a new ABI, we have to re-bless all the
// hashing tests. These are used in many places, so giving them stable values reduces test
// churn. The specific values are meaningless.
Rust,
C { unwind: bool },
Cdecl { unwind: bool },
Stdcall { unwind: bool },
Fastcall { unwind: bool },
Vectorcall { unwind: bool },
Thiscall { unwind: bool },
Aapcs { unwind: bool },
Win64 { unwind: bool },
SysV64 { unwind: bool },
PtxKernel,
Msp430Interrupt,
X86Interrupt,
AmdGpuKernel,
EfiApi,
AvrInterrupt,
AvrNonBlockingInterrupt,
CCmseNonSecureCall,
Wasm,
System { unwind: bool },
RustIntrinsic,
RustCall,
PlatformIntrinsic,
Unadjusted,
RustCold,
}
#[derive(Copy, Clone)]
pub struct AbiData {
abi: Abi,
/// Name of this ABI as we like it called.
name: &'static str,
}
#[allow(non_upper_case_globals)]
const AbiDatas: &[AbiData] = &[
AbiData { abi: Abi::Rust, name: "Rust" },
AbiData { abi: Abi::C { unwind: false }, name: "C" },
AbiData { abi: Abi::C { unwind: true }, name: "C-unwind" },
AbiData { abi: Abi::Cdecl { unwind: false }, name: "cdecl" },
AbiData { abi: Abi::Cdecl { unwind: true }, name: "cdecl-unwind" },
AbiData { abi: Abi::Stdcall { unwind: false }, name: "stdcall" },
AbiData { abi: Abi::Stdcall { unwind: true }, name: "stdcall-unwind" },
AbiData { abi: Abi::Fastcall { unwind: false }, name: "fastcall" },
AbiData { abi: Abi::Fastcall { unwind: true }, name: "fastcall-unwind" },
AbiData { abi: Abi::Vectorcall { unwind: false }, name: "vectorcall" },
AbiData { abi: Abi::Vectorcall { unwind: true }, name: "vectorcall-unwind" },
AbiData { abi: Abi::Thiscall { unwind: false }, name: "thiscall" },
AbiData { abi: Abi::Thiscall { unwind: true }, name: "thiscall-unwind" },
AbiData { abi: Abi::Aapcs { unwind: false }, name: "aapcs" },
AbiData { abi: Abi::Aapcs { unwind: true }, name: "aapcs-unwind" },
AbiData { abi: Abi::Win64 { unwind: false }, name: "win64" },
AbiData { abi: Abi::Win64 { unwind: true }, name: "win64-unwind" },
AbiData { abi: Abi::SysV64 { unwind: false }, name: "sysv64" },
AbiData { abi: Abi::SysV64 { unwind: true }, name: "sysv64-unwind" },
AbiData { abi: Abi::PtxKernel, name: "ptx-kernel" },
AbiData { abi: Abi::Msp430Interrupt, name: "msp430-interrupt" },
AbiData { abi: Abi::X86Interrupt, name: "x86-interrupt" },
AbiData { abi: Abi::AmdGpuKernel, name: "amdgpu-kernel" },
AbiData { abi: Abi::EfiApi, name: "efiapi" },
AbiData { abi: Abi::AvrInterrupt, name: "avr-interrupt" },
AbiData { abi: Abi::AvrNonBlockingInterrupt, name: "avr-non-blocking-interrupt" },
AbiData { abi: Abi::CCmseNonSecureCall, name: "C-cmse-nonsecure-call" },
AbiData { abi: Abi::Wasm, name: "wasm" },
AbiData { abi: Abi::System { unwind: false }, name: "system" },
AbiData { abi: Abi::System { unwind: true }, name: "system-unwind" },
AbiData { abi: Abi::RustIntrinsic, name: "rust-intrinsic" },
AbiData { abi: Abi::RustCall, name: "rust-call" },
AbiData { abi: Abi::PlatformIntrinsic, name: "platform-intrinsic" },
AbiData { abi: Abi::Unadjusted, name: "unadjusted" },
AbiData { abi: Abi::RustCold, name: "rust-cold" },
];
/// Returns the ABI with the given name (if any).
pub fn lookup(name: &str) -> Option<Abi> {
AbiDatas.iter().find(|abi_data| name == abi_data.name).map(|&x| x.abi)
}
pub fn all_names() -> Vec<&'static str> {
AbiDatas.iter().map(|d| d.name).collect()
}
impl Abi {
/// Default ABI chosen for `extern fn` declarations without an explicit ABI.
pub const FALLBACK: Abi = Abi::C { unwind: false };
#[inline]
pub fn index(self) -> usize {
// N.B., this ordering MUST match the AbiDatas array above.
// (This is ensured by the test indices_are_correct().)
use Abi::*;
let i = match self {
// Cross-platform ABIs
Rust => 0,
C { unwind: false } => 1,
C { unwind: true } => 2,
// Platform-specific ABIs
Cdecl { unwind: false } => 3,
Cdecl { unwind: true } => 4,
Stdcall { unwind: false } => 5,
Stdcall { unwind: true } => 6,
Fastcall { unwind: false } => 7,
Fastcall { unwind: true } => 8,
Vectorcall { unwind: false } => 9,
Vectorcall { unwind: true } => 10,
Thiscall { unwind: false } => 11,
Thiscall { unwind: true } => 12,
Aapcs { unwind: false } => 13,
Aapcs { unwind: true } => 14,
Win64 { unwind: false } => 15,
Win64 { unwind: true } => 16,
SysV64 { unwind: false } => 17,
SysV64 { unwind: true } => 18,
PtxKernel => 19,
Msp430Interrupt => 20,
X86Interrupt => 21,
AmdGpuKernel => 22,
EfiApi => 23,
AvrInterrupt => 24,
AvrNonBlockingInterrupt => 25,
CCmseNonSecureCall => 26,
Wasm => 27,
// Cross-platform ABIs
System { unwind: false } => 28,
System { unwind: true } => 29,
RustIntrinsic => 30,
RustCall => 31,
PlatformIntrinsic => 32,
Unadjusted => 33,
RustCold => 34,
};
debug_assert!(
AbiDatas
.iter()
.enumerate()
.find(|(_, AbiData { abi, .. })| *abi == self)
.map(|(index, _)| index)
.expect("abi variant has associated data")
== i,
"Abi index did not match `AbiDatas` ordering"
);
i
}
#[inline]
pub fn data(self) -> &'static AbiData {
&AbiDatas[self.index()]
}
pub fn name(self) -> &'static str {
self.data().name
}
}
impl fmt::Display for Abi {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
abi => write!(f, "\"{}\"", abi.name()),
}
}
}
|
