[ARM][CMSE] Implement CMSE attributes
This patch adds CMSE attributes `cmse_nonsecure_call` and
`cmse_nonsecure_entry`. As usual, specification is available here:
https://developer.arm.com/docs/ecm0359818/latest
Patch by Javed Absar, Bradley Smith, David Green, Momchil Velikov,
possibly others.
Differential Revision: https://reviews.llvm.org/D71129
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index 5ea5103..061a7d0 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -1992,6 +1992,20 @@
D->addAttr(CA);
}
+static void handleCmseNSEntryAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
+ if (S.LangOpts.CPlusPlus && !D->getDeclContext()->isExternCContext()) {
+ S.Diag(AL.getLoc(), diag::err_attribute_not_clinkage) << AL;
+ return;
+ }
+
+ if (cast<FunctionDecl>(D)->getStorageClass() == SC_Static) {
+ S.Diag(AL.getLoc(), diag::warn_attribute_cmse_entry_static);
+ return;
+ }
+
+ D->addAttr(::new (S.Context) CmseNSEntryAttr(S.Context, AL));
+}
+
static void handleNakedAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
if (checkAttrMutualExclusion<DisableTailCallsAttr>(S, D, AL))
return;
@@ -7145,6 +7159,9 @@
case ParsedAttr::AT_NoDebug:
handleNoDebugAttr(S, D, AL);
break;
+ case ParsedAttr::AT_CmseNSEntry:
+ handleCmseNSEntryAttr(S, D, AL);
+ break;
case ParsedAttr::AT_StdCall:
case ParsedAttr::AT_CDecl:
case ParsedAttr::AT_FastCall: