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* [gcc r13-5295] [PATCH 7/15] arm: Emit build attributes for PACBTI target feature
@ 2023-01-23 10:46 Andrea Corallo
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From: Andrea Corallo @ 2023-01-23 10:46 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:616c1d02bcea9ff24ff2873c6d2efc84c7be4192
commit r13-5295-g616c1d02bcea9ff24ff2873c6d2efc84c7be4192
Author: Andrea Corallo <andrea.corallo@arm.com>
Date: Mon Dec 6 11:42:24 2021 +0100
[PATCH 7/15] arm: Emit build attributes for PACBTI target feature
This patch emits assembler directives for PACBTI build attributes as
defined by the
ABI.
<https://github.com/ARM-software/abi-aa/releases/download/2021Q1/addenda32.pdf>
gcc/ChangeLog:
* config/arm/arm.cc (arm_file_start): Emit EABI attributes for
Tag_PAC_extension, Tag_BTI_extension, TAG_BTI_use, TAG_PACRET_use.
gcc/testsuite/ChangeLog:
* gcc.target/arm/acle/pacbti-m-predef-1.c: New test.
* gcc.target/arm/acle/pacbti-m-predef-3.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-6.c: Likewise.
* gcc.target/arm/acle/pacbti-m-predef-7.c: Likewise.
Co-Authored-By: Tejas Belagod <tbelagod@arm.com>
Diff:
---
gcc/config/arm/arm.cc | 18 ++++++++++++++++++
gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-1.c | 17 +++++++++++++++++
gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-3.c | 17 +++++++++++++++++
gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-6.c | 16 ++++++++++++++++
gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-7.c | 17 +++++++++++++++++
5 files changed, 85 insertions(+)
diff --git a/gcc/config/arm/arm.cc b/gcc/config/arm/arm.cc
index 76c6f94d6d6..358b813cb32 100644
--- a/gcc/config/arm/arm.cc
+++ b/gcc/config/arm/arm.cc
@@ -28478,6 +28478,8 @@ static void
arm_file_start (void)
{
int val;
+ bool pac = (aarch_ra_sign_scope != AARCH_FUNCTION_NONE);
+ bool bti = (aarch_enable_bti == 1);
arm_print_asm_arch_directives
(asm_out_file, TREE_TARGET_OPTION (target_option_default_node));
@@ -28548,6 +28550,22 @@ arm_file_start (void)
arm_emit_eabi_attribute ("Tag_ABI_FP_16bit_format", 38,
(int) arm_fp16_format);
+ if (TARGET_HAVE_PACBTI)
+ {
+ arm_emit_eabi_attribute ("Tag_PAC_extension", 50, 2);
+ arm_emit_eabi_attribute ("Tag_BTI_extension", 52, 2);
+ }
+ else if (pac || bti)
+ {
+ arm_emit_eabi_attribute ("Tag_PAC_extension", 50, 1);
+ arm_emit_eabi_attribute ("Tag_BTI_extension", 52, 1);
+ }
+
+ if (bti)
+ arm_emit_eabi_attribute ("TAG_BTI_use", 74, 1);
+ if (pac)
+ arm_emit_eabi_attribute ("TAG_PACRET_use", 76, 1);
+
if (arm_lang_output_object_attributes_hook)
arm_lang_output_object_attributes_hook();
}
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-1.c b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-1.c
new file mode 100644
index 00000000000..122f7a762a7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-1.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target mbranch_protection_ok } */
+/* { dg-options "-march=armv8.1-m.main+fp -mbranch-protection=pac-ret+bti -mfloat-abi=hard --save-temps" } */
+
+#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
+
+/* { dg-final { scan-assembler-not "\.arch_extension pacbti" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 50, 1" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 52, 1" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 74, 1" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 76, 1" } } */
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-3.c b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-3.c
new file mode 100644
index 00000000000..b94f3447ad9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-3.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target mbranch_protection_ok } */
+/* { dg-options "-march=armv8.1-m.main+fp -mbranch-protection=pac-ret+leaf -mfloat-abi=hard --save-temps" } */
+
+#if defined (__ARM_FEATURE_BTI_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be undefined."
+#endif
+
+#if !defined (__ARM_FEATURE_PAC_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_PAC_DEFAULT should be defined."
+#endif
+
+/* { dg-final { scan-assembler-not "\.arch_extension pacbti" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 50, 1" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 52, 1" } } */
+/* { dg-final { scan-assembler-not "\.eabi_attribute 74" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 76, 1" } } */
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-6.c b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-6.c
new file mode 100644
index 00000000000..ed52afc83c5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-6.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target mbranch_protection_ok } */
+/* { dg-additional-options "-march=armv8.1-m.main+fp -mbranch-protection=bti -mfloat-abi=hard --save-temps" } */
+
+#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 undefined."
+#endif
+/* { dg-final { scan-assembler-not "\.arch_extension pacbti" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 50, 1" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 52, 1" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 74, 1" } } */
+/* { dg-final { scan-assembler-not "\.eabi_attribute 76" } } */
diff --git a/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-7.c b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-7.c
new file mode 100644
index 00000000000..1b25907635e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/acle/pacbti-m-predef-7.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-skip-if "avoid conflicting multilib options" { *-*-* } { "-marm" "-mcpu=*" } } */
+/* { dg-additional-options "-march=armv8.1-m.main+pacbti+fp --save-temps -mfloat-abi=hard" } */
+
+#if defined (__ARM_FEATURE_BTI_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_BTI_DEFAULT should be undefined."
+#endif
+
+#if defined (__ARM_FEATURE_PAC_DEFAULT)
+#error "Feature test macro __ARM_FEATURE_PAC_DEFAULT should be undefined."
+#endif
+
+/* { dg-final { scan-assembler "\.arch_extension pacbti" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 50, 2" } } */
+/* { dg-final { scan-assembler "\.eabi_attribute 52, 2" } } */
+/* { dg-final { scan-assembler-not "\.eabi_attribute 74" } } */
+/* { dg-final { scan-assembler-not "\.eabi_attribute 76" } } */
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