bjoernager/rust
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allow system abi to be variadic

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This commit is contained in:
beepster4096 2024-01-12 23:05:07 -08:00
parent 090d5eac72
commit 41e224b1bc
8 changed files with 34 additions and 13 deletions
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8
compiler/rustc_target/src/spec/mod.rs
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@ -2399,10 +2399,14 @@ impl DerefMut for Target {
impl Target {
/// Given a function ABI, turn it into the correct ABI for this target.
pub fn adjust_abi(&self, abi: Abi) -> Abi {
pub fn adjust_abi(&self, abi: Abi, c_variadic: bool) -> Abi {
match abi {
Abi::C { .. } => self.default_adjusted_cabi.unwrap_or(abi),
Abi::System { unwind } if self.is_like_windows && self.arch == "x86" => {
// On Windows, `extern "system"` behaves like msvc's `__stdcall`.
// `__stdcall` only applies on x86 and on non-variadic functions:
// https://learn.microsoft.com/en-us/cpp/cpp/stdcall?view=msvc-170
Abi::System { unwind } if self.is_like_windows && self.arch == "x86" && !c_variadic => {
Abi::Stdcall { unwind }
}
Abi::System { unwind } => Abi::C { unwind },