bjoernager/rust
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Add support for cmse_nonsecure_entry attribute

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This patch adds support for the LLVM cmse_nonsecure_entry attribute.
This is a target-dependent attribute that only has sense for the
thumbv8m Rust targets.
You can find more information about this attribute here:
https://developer.arm.com/documentation/ecm0359818/latest/

Signed-off-by: Hugues de Valon <hugues.devalon@arm.com>
This commit is contained in:
Hugues de Valon 2020-09-28 21:10:38 +01:00
parent d255d70e7a
commit 1aaafac6ff
15 changed files with 154 additions and 1 deletions
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3
compiler/rustc_codegen_llvm/src/attributes.rs
View file

@ -294,6 +294,9 @@ pub fn from_fn_attrs(cx: &CodegenCx<'ll, 'tcx>, llfn: &'ll Value, instance: ty::
if codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::ALLOCATOR) {
Attribute::NoAlias.apply_llfn(llvm::AttributePlace::ReturnValue, llfn);
}
if codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::CMSE_NONSECURE_ENTRY) {
llvm::AddFunctionAttrString(llfn, Function, const_cstr!("cmse_nonsecure_entry"));
}
sanitize(cx, codegen_fn_attrs.no_sanitize, llfn);
// Always annotate functions with the target-cpu they are compiled for.

6
compiler/rustc_codegen_llvm/src/llvm/mod.rs
View file

@ -37,6 +37,12 @@ pub fn AddFunctionAttrStringValue(llfn: &'a Value, idx: AttributePlace, attr: &C
}
}
pub fn AddFunctionAttrString(llfn: &'a Value, idx: AttributePlace, attr: &CStr) {
unsafe {
LLVMRustAddFunctionAttrStringValue(llfn, idx.as_uint(), attr.as_ptr(), std::ptr::null())
}
}
#[derive(Copy, Clone)]
pub enum AttributePlace {
ReturnValue,