Add a comment regarding GCS + PAuthABI

kovdan01 · kovdan01 · commit 4f3da9e51338 · 2024-07-18T11:49:14.000+03:00
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -1597,6 +1597,8 @@ static void CollectARMPACBTIOptions(const ToolChain &TC, const ArgList &Args,
   }
   if (IndirectBranches)
     CmdArgs.push_back("-mbranch-target-enforce");
+  // GCS is currently untested with PAuthABI, but enabling this could be allowed
+  // in future after testing with a suitable system.
   if (GuardedControlStack) {
     if (Triple.getEnvironment() == llvm::Triple::PAuthTest)
       D.Diag(diag::err_drv_unsupported_opt_for_target)

Original file line number	Diff line number	Diff line change
`@@ -1597,6 +1597,8 @@ static void CollectARMPACBTIOptions(const ToolChain &TC, const ArgList &Args,`
`1597`	`1597`	`}`
`1598`	`1598`	`if (IndirectBranches)`
`1599`	`1599`	`CmdArgs.push_back("-mbranch-target-enforce");`
	`1600`	`+ // GCS is currently untested with PAuthABI, but enabling this could be allowed`
	`1601`	`+ // in future after testing with a suitable system.`
`1600`	`1602`	`if (GuardedControlStack) {`
`1601`	`1603`	`if (Triple.getEnvironment() == llvm::Triple::PAuthTest)`
`1602`	`1604`	`D.Diag(diag::err_drv_unsupported_opt_for_target)`