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* [gcc r13-4184] Make ARMv8-M attribute cmse_nonsecure_call work in Ada
@ 2022-11-21 8:48 Eric Botcazou
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From: Eric Botcazou @ 2022-11-21 8:48 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:061839c65de7d04589ced3a4e55ef391e7c66b71
commit r13-4184-g061839c65de7d04589ced3a4e55ef391e7c66b71
Author: Eric Botcazou <ebotcazou@adacore.com>
Date: Mon Nov 21 07:57:25 2022 +0100
Make ARMv8-M attribute cmse_nonsecure_call work in Ada
Unlike most other machine attributes, this one does not work in Ada because,
while it applies to pointer-to-function types, it is explicitly marked as
requiring declarations in the implementation.
Now, in Ada, machine attributes are specified like this:
type Non_Secure is access procedure;
pragma Machine_Attribute (Non_Secure, "cmse_nonsecure_call");
i.e. not attached to the declaration of Non_Secure.
The change extends the support to Ada by also accepting pointer-to-function
types in the handler.
gcc/
* config/arm/arm.cc (arm_attribute_table) <cmse_nonsecure_call>:
Change decl_required field to false.
(arm_handle_cmse_nonsecure_call): Deal with a TYPE node.
gcc/testsuite/
* gnat.dg/machine_attr2.ads, gnat.dg/machine_attr2.adb: New test.
Diff:
---
gcc/config/arm/arm.cc | 33 ++++++++++++++++++++++-----------
gcc/testsuite/gnat.dg/machine_attr2.adb | 15 +++++++++++++++
gcc/testsuite/gnat.dg/machine_attr2.ads | 8 ++++++++
3 files changed, 45 insertions(+), 11 deletions(-)
diff --git a/gcc/config/arm/arm.cc b/gcc/config/arm/arm.cc
index 2eb4d51e4a3..b587561eebe 100644
--- a/gcc/config/arm/arm.cc
+++ b/gcc/config/arm/arm.cc
@@ -375,7 +375,7 @@ static const struct attribute_spec arm_attribute_table[] =
/* ARMv8-M Security Extensions support. */
{ "cmse_nonsecure_entry", 0, 0, true, false, false, false,
arm_handle_cmse_nonsecure_entry, NULL },
- { "cmse_nonsecure_call", 0, 0, true, false, false, true,
+ { "cmse_nonsecure_call", 0, 0, false, false, false, true,
arm_handle_cmse_nonsecure_call, NULL },
{ "Advanced SIMD type", 1, 1, false, true, false, true, NULL, NULL },
{ NULL, 0, 0, false, false, false, false, NULL, NULL }
@@ -7605,8 +7605,8 @@ arm_handle_cmse_nonsecure_call (tree *node, tree name,
int /* flags */,
bool *no_add_attrs)
{
- tree decl = NULL_TREE, fntype = NULL_TREE;
- tree type;
+ tree decl = NULL_TREE;
+ tree fntype, type;
if (!use_cmse)
{
@@ -7616,16 +7616,20 @@ arm_handle_cmse_nonsecure_call (tree *node, tree name,
return NULL_TREE;
}
- if (TREE_CODE (*node) == VAR_DECL || TREE_CODE (*node) == TYPE_DECL)
+ if (DECL_P (*node))
{
- decl = *node;
- fntype = TREE_TYPE (decl);
+ fntype = TREE_TYPE (*node);
+
+ if (TREE_CODE (*node) == VAR_DECL || TREE_CODE (*node) == TYPE_DECL)
+ decl = *node;
}
+ else
+ fntype = *node;
- while (fntype != NULL_TREE && TREE_CODE (fntype) == POINTER_TYPE)
+ while (fntype && TREE_CODE (fntype) == POINTER_TYPE)
fntype = TREE_TYPE (fntype);
- if (!decl || TREE_CODE (fntype) != FUNCTION_TYPE)
+ if ((DECL_P (*node) && !decl) || TREE_CODE (fntype) != FUNCTION_TYPE)
{
warning (OPT_Wattributes, "%qE attribute only applies to base type of a "
"function pointer", name);
@@ -7640,10 +7644,17 @@ arm_handle_cmse_nonsecure_call (tree *node, tree name,
/* Prevent trees being shared among function types with and without
cmse_nonsecure_call attribute. */
- type = TREE_TYPE (decl);
+ if (decl)
+ {
+ type = build_distinct_type_copy (TREE_TYPE (decl));
+ TREE_TYPE (decl) = type;
+ }
+ else
+ {
+ type = build_distinct_type_copy (*node);
+ *node = type;
+ }
- type = build_distinct_type_copy (type);
- TREE_TYPE (decl) = type;
fntype = type;
while (TREE_CODE (fntype) != FUNCTION_TYPE)
diff --git a/gcc/testsuite/gnat.dg/machine_attr2.adb b/gcc/testsuite/gnat.dg/machine_attr2.adb
new file mode 100644
index 00000000000..e98a69aefc1
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/machine_attr2.adb
@@ -0,0 +1,15 @@
+-- { dg-do compile { target arm*-*-* } }
+-- { dg-options "-mcpu=cortex-m33 -mcmse" }
+
+package body Machine_Attr2 is
+
+ procedure Call (Proc : Non_Secure) is
+ begin
+ Proc.all;
+ end;
+
+ procedure Foo; -- { dg-warning "only applies to base type" }
+ pragma Machine_Attribute (Foo, "cmse_nonsecure_call");
+ procedure Foo is null;
+
+end Machine_Attr2;
diff --git a/gcc/testsuite/gnat.dg/machine_attr2.ads b/gcc/testsuite/gnat.dg/machine_attr2.ads
new file mode 100644
index 00000000000..4eda09e0f97
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/machine_attr2.ads
@@ -0,0 +1,8 @@
+package Machine_Attr2 is
+
+ type Non_Secure is access procedure;
+ pragma Machine_Attribute (Non_Secure, "cmse_nonsecure_call");
+
+ procedure Call (Proc : Non_Secure);
+
+end Machine_Attr2;
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