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add extern "custom" functions

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This commit is contained in:
Folkert de Vries
2025-05-07 20:02:29 +02:00
parent 0a39445252
commit 5f73ce2b7e
34 changed files with 988 additions and 10 deletions
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6
compiler/rustc_codegen_gcc/src/abi.rs
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@@ -239,12 +239,16 @@ impl<'gcc, 'tcx> FnAbiGccExt<'gcc, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
pub fn conv_to_fn_attribute<'gcc>(conv: CanonAbi, arch: &str) -> Option<FnAttribute<'gcc>> {
let attribute = match conv {
CanonAbi::C | CanonAbi::Rust => return None,
CanonAbi::RustCold => FnAttribute::Cold,
// Functions with this calling convention can only be called from assembly, but it is
// possible to declare an `extern "custom"` block, so the backend still needs a calling
// convention for declaring foreign functions.
CanonAbi::Custom => return None,
CanonAbi::Arm(arm_call) => match arm_call {
ArmCall::CCmseNonSecureCall => FnAttribute::ArmCmseNonsecureCall,
ArmCall::CCmseNonSecureEntry => FnAttribute::ArmCmseNonsecureEntry,
ArmCall::Aapcs => FnAttribute::ArmPcs("aapcs"),
},
CanonAbi::RustCold => FnAttribute::Cold,
CanonAbi::GpuKernel => {
if arch == "amdgpu" {
FnAttribute::GcnAmdGpuHsaKernel