Richard Earnshaw <richard.earns...@foss.arm.com> writes:
> On 28/04/2022 10:42, Andrea Corallo via Gcc-patches wrote:
>> This patch implements target feature macros when PACBTI is enabled
>> through the -march option or -mbranch-protection. The target feature
>> macros __ARM_FEATURE_PAC_DEFAULT and __ARM_FEATURE_BTI_DEFAULT are
>> specified in ARM ACLE
>> <https://developer.arm.com/documentation/101028/0012/5--Feature-test-macros?lang=en>
>> __ARM_FEATURE_PAUTH and __ARM_FEATURE_BTI are specified in the
>> pull-request <https://github.com/ARM-software/acle/pull/55>.
>> Approved here
>> <https://gcc.gnu.org/pipermail/gcc-patches/2021-December/586334.html>.
>> gcc/ChangeLog:
>> * config/arm/arm-c.c (arm_cpu_builtins): Define
>> __ARM_FEATURE_BTI_DEFAULT, __ARM_FEATURE_PAC_DEFAULT,
>> __ARM_FEATURE_PAUTH and __ARM_FEATURE_BTI.
>
> This bit is OK.
>
>> gcc/testsuite/ChangeLog:
>> * gcc.target/arm/acle/pacbti-m-predef-2.c: New test.
>> * gcc.target/arm/acle/pacbti-m-predef-4.c: New test.
>> * gcc.target/arm/acle/pacbti-m-predef-5.c: New test.
>>
>
> These are all execution tests. I think we also need some compile-only
> tests so that we get better coverage when the target does not directly
> support PACBTI.
>
> We also need some tests for the defines when targetting armv8-m.main
> and some tests for checking __ARM_FEATURE_BTI and __ARM_FEATURE_PAC
> (the tests here check only the '..._DEFAULT' macros.
Hi Richard & all,
please find attached the updated version of this patch.
Best Regards
Andrea
gcc/ChangeLog:
* config/arm/arm-c.c (arm_cpu_builtins): Define
__ARM_FEATURE_BTI_DEFAULT, __ARM_FEATURE_PAC_DEFAULT,
__ARM_FEATURE_PAUTH and __ARM_FEATURE_BTI.
gcc/testsuite/ChangeLog:
* gcc.target/arm/acle/pacbti-m-predef-2.c: New test.
* gcc.target/arm/acle/pacbti-m-predef-4.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-5.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-8.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-9.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-10.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-11.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-12.c: Likewise.
>From d1897ca2db828d214a6591ab34f29cf42ebd2fb6 Mon Sep 17 00:00:00 2001
From: Andrea Corallo <andrea.cora...@arm.com>
Date: Mon, 6 Dec 2021 11:39:59 +0100
Subject: [PATCH] [PATCH 5/12] arm: Implement target feature macros for PACBTI
This patch implements target feature macros when PACBTI is enabled
through the -march option or -mbranch-protection. The target feature
macros __ARM_FEATURE_PAC_DEFAULT and __ARM_FEATURE_BTI_DEFAULT are
specified in ARM ACLE
<https://developer.arm.com/documentation/101028/0012/5--Feature-test-macros?lang=en>
__ARM_FEATURE_PAUTH and __ARM_FEATURE_BTI are specified in the
pull-request <https://github.com/ARM-software/acle/pull/55>.
Approved here
<https://gcc.gnu.org/pipermail/gcc-patches/2021-December/586334.html>.
gcc/ChangeLog:
* config/arm/arm-c.c (arm_cpu_builtins): Define
__ARM_FEATURE_BTI_DEFAULT, __ARM_FEATURE_PAC_DEFAULT,
__ARM_FEATURE_PAUTH and __ARM_FEATURE_BTI.
gcc/testsuite/ChangeLog:
* gcc.target/arm/acle/pacbti-m-predef-2.c: New test.
* gcc.target/arm/acle/pacbti-m-predef-4.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-5.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-8.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-9.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-10.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-11.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-12.c: Likewise.
Co-Authored-By: Tejas Belagod <tbela...@arm.com>
---
gcc/config/arm/arm-c.cc | 18 ++++++++++++++
.../gcc.target/arm/acle/pacbti-m-predef-10.c | 10 ++++++++
.../gcc.target/arm/acle/pacbti-m-predef-11.c | 10 ++++++++
.../gcc.target/arm/acle/pacbti-m-predef-12.c | 10 ++++++++
.../gcc.target/arm/acle/pacbti-m-predef-2.c | 24 +++++++++++++++++++
.../gcc.target/arm/acle/pacbti-m-predef-4.c | 21 ++++++++++++++++
.../gcc.target/arm/acle/pacbti-m-predef-5.c | 24 +++++++++++++++++++
.../gcc.target/arm/acle/pacbti-m-predef-8.c | 11 +++++++++
.../gcc.target/arm/acle/pacbti-m-predef-9.c | 10 ++++++++
9 files changed, 138 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-10.c
create mode 100644 gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-11.c
create mode 100644 gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-12.c
create mode 100644 gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-2.c
create mode 100644 gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-4.c
create mode 100644 gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-5.c
create mode 100644 gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-8.c
create mode 100644 gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-9.c
diff --git a/gcc/config/arm/arm-c.cc b/gcc/config/arm/arm-c.cc
index a8697b8c62f..190099b2c37 100644
--- a/gcc/config/arm/arm-c.cc
+++ b/gcc/config/arm/arm-c.cc
@@ -212,6 +212,24 @@ arm_cpu_builtins (struct cpp_reader* pfile)
def_or_undef_macro (pfile, "__ARM_FEATURE_COMPLEX", TARGET_COMPLEX);
def_or_undef_macro (pfile, "__ARM_32BIT_STATE", TARGET_32BIT);
+ def_or_undef_macro (pfile, "__ARM_FEATURE_PAUTH", TARGET_HAVE_PACBTI);
+ def_or_undef_macro (pfile, "__ARM_FEATURE_BTI", TARGET_HAVE_PACBTI);
+ def_or_undef_macro (pfile, "__ARM_FEATURE_BTI_DEFAULT",
+ aarch_enable_bti == 1);
+
+ cpp_undef (pfile, "__ARM_FEATURE_PAC_DEFAULT");
+ if (aarch_ra_sign_scope != AARCH_FUNCTION_NONE)
+ {
+ unsigned int pac = 1;
+
+ gcc_assert (aarch_ra_sign_key == AARCH_KEY_A);
+
+ if (aarch_ra_sign_scope == AARCH_FUNCTION_ALL)
+ pac |= 0x4;
+
+ builtin_define_with_int_value ("__ARM_FEATURE_PAC_DEFAULT", pac);
+ }
+
cpp_undef (pfile, "__ARM_FEATURE_MVE");
if (TARGET_HAVE_MVE && TARGET_HAVE_MVE_FLOAT)
{
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-10.c
b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-10.c
new file mode 100644
index 00000000000..311cf572dd9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-10.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options " -mbranch-protection=bti+pac-ret" } */
+
+#if (__ARM_FEATURE_BTI_DEFAULT != 1)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be defined to 1."
+#endif
+
+#if !defined (__ARM_FEATURE_PAC_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_PAC_DEFAULT should be defined."
+#endif
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-11.c
b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-11.c
new file mode 100644
index 00000000000..2663551e18a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-11.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8.1-m.main+pacbti" } */
+
+#if (__ARM_FEATURE_BTI != 1)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be defined to 1."
+#endif
+
+#if (__ARM_FEATURE_PAUTH != 1)
+#error "Feature test macro __ARM_FEATURE__PAUTH should be defined to 1."
+#endif
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-12.c
b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-12.c
new file mode 100644
index 00000000000..01a53c0b536
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-12.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8.1-m.main" } */
+
+#if defined (__ARM_FEATURE_BTI)
+#error "Feature test macro __ARM_FEATURE_BTI should not be defined."
+#endif
+
+#if defined (__ARM_FEATURE_PAUTH)
+#error "Feature test macro __ARM_FEATURE_PAUTH should not be defined."
+#endif
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-2.c
b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-2.c
new file mode 100644
index 00000000000..4394fd147d7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-2.c
@@ -0,0 +1,24 @@
+
+/* { dg-do run } */
+/* { dg-require-effective-target arm_pacbti_hw } */
+/* { dg-additional-options " -mbranch-protection=bti+pac-ret+leaf" } */
+
+#if !defined (__ARM_FEATURE_BTI_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be defined."
+#endif
+
+#if !defined (__ARM_FEATURE_PAC_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_PAC_DEFAULT should be defined."
+#endif
+
+int
+main()
+{
+ if (__ARM_FEATURE_BTI_DEFAULT != 1)
+ __builtin_abort ();
+
+ if (__ARM_FEATURE_PAC_DEFAULT != 5)
+ __builtin_abort ();
+
+ return 0;
+}
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-4.c
b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-4.c
new file mode 100644
index 00000000000..90f0c724b9e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-4.c
@@ -0,0 +1,21 @@
+
+/* { dg-do run } */
+/* { dg-require-effective-target arm_pacbti_hw } */
+/* { dg-additional-options " -mbranch-protection=pac-ret" } */
+
+#if !defined (__ARM_FEATURE_PAC_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be defined."
+#endif
+
+#if defined (__ARM_FEATURE_BTI_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be undefined."
+#endif
+
+int
+main()
+{
+ if (__ARM_FEATURE_PAC_DEFAULT != 1)
+ __builtin_abort ();
+
+ return 0;
+}
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-5.c
b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-5.c
new file mode 100644
index 00000000000..c865809b8b0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-5.c
@@ -0,0 +1,24 @@
+
+/* { dg-do run } */
+/* { dg-require-effective-target arm_pacbti_hw } */
+/* { dg-additional-options " -mbranch-protection=bti+pac-ret" } */
+
+#if !defined (__ARM_FEATURE_BTI_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be defined."
+#endif
+
+#if !defined (__ARM_FEATURE_PAC_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_PAC_DEFAULT should be defined."
+#endif
+
+int
+main()
+{
+ if (__ARM_FEATURE_BTI_DEFAULT != 1)
+ __builtin_abort ();
+
+ if (__ARM_FEATURE_PAC_DEFAULT != 1)
+ __builtin_abort ();
+
+ return 0;
+}
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-8.c
b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-8.c
new file mode 100644
index 00000000000..d5d069cbc89
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-8.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-additional-options " -mbranch-protection=bti+pac-ret+leaf" } */
+
+#if (__ARM_FEATURE_BTI_DEFAULT != 1)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be defined to 1."
+#endif
+
+#if (__ARM_FEATURE_PAC_DEFAULT != 5)
+#error "Feature test macro __ARM_FEATURE_PAC_DEFAULT should be defined to 5."
+#endif
+
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-9.c
b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-9.c
new file mode 100644
index 00000000000..f301beba0c7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-9.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options " -mbranch-protection=pac-ret" } */
+
+#if (__ARM_FEATURE_PAC_DEFAULT != 1)
+#error "Feature test macro __ARM_FEATURE_PAC_DEFAULT should be defined to 1."
+#endif
+
+#if defined (__ARM_FEATURE_BTI_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be undefined."
+#endif
--
2.25.1
