#include "tm-constrs.h"
#include "rtl-iter.h"
#include "optabs-libfuncs.h"
+#include "gimplify.h"
/* This file should be included last. */
#include "target-def.h"
static tree arm_handle_notshared_attribute (tree *, tree, tree, int, bool *);
#endif
static tree arm_handle_cmse_nonsecure_entry (tree *, tree, tree, int, bool *);
+static tree arm_handle_cmse_nonsecure_call (tree *, tree, tree, int, bool *);
static void arm_output_function_epilogue (FILE *, HOST_WIDE_INT);
static void arm_output_function_prologue (FILE *, HOST_WIDE_INT);
static int arm_comp_type_attributes (const_tree, const_tree);
/* ARMv8-M Security Extensions support. */
{ "cmse_nonsecure_entry", 0, 0, true, false, false,
arm_handle_cmse_nonsecure_entry, false },
+ { "cmse_nonsecure_call", 0, 0, true, false, false,
+ arm_handle_cmse_nonsecure_call, true },
{ NULL, 0, 0, false, false, false, NULL, false }
};
\f
return NULL_TREE;
}
+
+/* Called upon detection of the use of the cmse_nonsecure_call attribute, this
+ function will check whether the attribute is allowed here and will add the
+ attribute to the function type tree or otherwise issue a diagnostic. The
+ reason we check this at declaration time is to only allow the use of the
+ attribute with declarations of function pointers and not function
+ declarations. This function checks NODE is of the expected type and issues
+ diagnostics otherwise using NAME. If it is not of the expected type
+ *NO_ADD_ATTRS will be set to true. */
+
+static tree
+arm_handle_cmse_nonsecure_call (tree *node, tree name,
+ tree /* args */,
+ int /* flags */,
+ bool *no_add_attrs)
+{
+ tree decl = NULL_TREE, fntype = NULL_TREE;
+ tree main_variant, type;
+
+ if (!use_cmse)
+ {
+ *no_add_attrs = true;
+ warning (OPT_Wattributes, "%qE attribute ignored without -mcmse option.",
+ name);
+ return NULL_TREE;
+ }
+
+ if (TREE_CODE (*node) == VAR_DECL || TREE_CODE (*node) == TYPE_DECL)
+ {
+ decl = *node;
+ fntype = TREE_TYPE (decl);
+ }
+
+ while (fntype != NULL_TREE && TREE_CODE (fntype) == POINTER_TYPE)
+ fntype = TREE_TYPE (fntype);
+
+ if (!decl || TREE_CODE (fntype) != FUNCTION_TYPE)
+ {
+ warning (OPT_Wattributes, "%qE attribute only applies to base type of a "
+ "function pointer", name);
+ *no_add_attrs = true;
+ return NULL_TREE;
+ }
+
+ *no_add_attrs |= cmse_func_args_or_return_in_stack (NULL, name, fntype);
+
+ if (*no_add_attrs)
+ return NULL_TREE;
+
+ /* Prevent trees being shared among function types with and without
+ cmse_nonsecure_call attribute. */
+ type = TREE_TYPE (decl);
+
+ type = build_distinct_type_copy (type);
+ TREE_TYPE (decl) = type;
+ fntype = type;
+
+ while (TREE_CODE (fntype) != FUNCTION_TYPE)
+ {
+ type = fntype;
+ fntype = TREE_TYPE (fntype);
+ fntype = build_distinct_type_copy (fntype);
+ TREE_TYPE (type) = fntype;
+ }
+
+ /* Construct a type attribute and add it to the function type. */
+ tree attrs = tree_cons (get_identifier ("cmse_nonsecure_call"), NULL_TREE,
+ TYPE_ATTRIBUTES (fntype));
+ TYPE_ATTRIBUTES (fntype) = attrs;
+ return NULL_TREE;
+}
+
/* Return 0 if the attributes for two types are incompatible, 1 if they
are compatible, and 2 if they are nearly compatible (which causes a
warning to be generated). */
if (l1 != l2)
return 0;
+ l1 = lookup_attribute ("cmse_nonsecure_call",
+ TYPE_ATTRIBUTES (type1)) != NULL;
+ l2 = lookup_attribute ("cmse_nonsecure_call",
+ TYPE_ATTRIBUTES (type2)) != NULL;
+
+ if (l1 != l2)
+ return 0;
+
return 1;
}
--- /dev/null
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+int __attribute__ ((cmse_nonsecure_call)) (*ns_foo) (void);
+int (*s_bar) (void);
+int __attribute__ ((cmse_nonsecure_call)) (**ns_foo2) (void);
+int (**s_bar2) (void);
+
+typedef int __attribute__ ((cmse_nonsecure_call)) ns_foo_t (void);
+typedef int s_bar_t (void);
+typedef int __attribute__ ((cmse_nonsecure_call)) (* ns_foo_ptr) (void);
+typedef int (*s_bar_ptr) (void);
+
+int nonsecure0 (ns_foo_t * ns_foo_p)
+{
+ return ns_foo_p ();
+}
+
+int nonsecure1 (ns_foo_t ** ns_foo_p)
+{
+ return (*ns_foo_p) ();
+}
+
+int nonsecure2 (ns_foo_ptr ns_foo_p)
+{
+ return ns_foo_p ();
+}
+int nonsecure3 (ns_foo_ptr * ns_foo_p)
+{
+ return (*ns_foo_p) ();
+}
+
+int secure0 (s_bar_t * s_bar_p)
+{
+ return s_bar_p ();
+}
+
+int secure1 (s_bar_t ** s_bar_p)
+{
+ return (*s_bar_p) ();
+}
+
+int secure2 (s_bar_ptr s_bar_p)
+{
+ return s_bar_p ();
+}
+
+int secure3 (s_bar_ptr * s_bar_p)
+{
+ return (*s_bar_p) ();
+}
+
+int nonsecure4 (void)
+{
+ return ns_foo ();
+}
+
+int nonsecure5 (void)
+{
+ return (*ns_foo2) ();
+}
+
+int secure4 (void)
+{
+ return s_bar ();
+}
+
+int secure5 (void)
+{
+ return (*s_bar2) ();
+}
+/* { dg-final { scan-assembler-times "bl\\s+__gnu_cmse_nonsecure_call" 6 } } */
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