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Rollup merge of #104077 - nicholasbishop:bishop-uefi-aapcs, r=nagisa

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Use aapcs for efiapi calling convention on arm

On arm, [llvm treats the C calling convention as `aapcs` on soft-float targets and `aapcs-vfp` on hard-float targets](https://github.com/rust-lang/compiler-builtins/issues/116#issuecomment-261057422). UEFI specifies in the arm calling convention that [floating point extensions aren't used](https://uefi.org/specs/UEFI/2.10/02_Overview.html#detailed-calling-convention), so always translate `efiapi` to `aapcs` on arm.

https://github.com/rust-lang/rust/issues/65815
This commit is contained in:
Manish Goregaokar 2022-11-10 10:47:39 -05:00 committed by GitHub
commit 8f2c1f8469
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2 changed files with 2 additions and 1 deletions
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1
compiler/rustc_target/src/spec/mod.rs
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@ -1911,6 +1911,7 @@ pub fn adjust_abi(&self, abi: Abi) -> Abi {
Abi::Stdcall { unwind }
}
Abi::System { unwind } => Abi::C { unwind },
Abi::EfiApi if self.arch == "arm" => Abi::Aapcs { unwind: false },
Abi::EfiApi if self.arch == "x86_64" => Abi::Win64 { unwind: false },
Abi::EfiApi => Abi::C { unwind: false },

2
src/test/codegen/abi-efiapi.rs
View File

@ -27,7 +27,7 @@ trait Copy { }
//x86_64: define win64cc void @has_efiapi
//i686: define void @has_efiapi
//aarch64: define dso_local void @has_efiapi
//arm: define dso_local void @has_efiapi
//arm: define dso_local arm_aapcscc void @has_efiapi
//riscv: define dso_local void @has_efiapi
#[no_mangle]
pub extern "efiapi" fn has_efiapi() {}