[gcc(refs/vendors/ARM/heads/arm-12-m-pacbti)] [PATCH 4/15] arm: Add testsuite library support for PACBTI target
Andrea Corallo
akrl@gcc.gnu.org
Fri Aug 19 13:23:59 GMT 2022
https://gcc.gnu.org/g:a803ebd8be60cccd23ef5bb5013202610b032a66
commit a803ebd8be60cccd23ef5bb5013202610b032a66
Author: Andrea Corallo <andrea.corallo@arm.com>
Date: Mon Dec 6 11:39:35 2021 +0100
[PATCH 4/15] arm: Add testsuite library support for PACBTI target
Add targeting-checking entities for PACBTI in testsuite
framework.
Pre-approved with the requested changes here
<https://gcc.gnu.org/pipermail/gcc-patches/2021-December/586331.html>.
gcc/testsuite/ChangeLog:
* testsuite/lib/target-supports.exp:
(check_effective_target_arm_pacbti_hw): New.
* doc/sourcebuild.texi: Document arm_pacbti_hw.
Co-Authored-By: Tejas Belagod <tbelagod@arm.com>
Diff:
---
gcc/doc/sourcebuild.texi | 10 ++++++++++
gcc/testsuite/lib/target-supports.exp | 16 ++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi
index 71c04841df2..52162c061bd 100644
--- a/gcc/doc/sourcebuild.texi
+++ b/gcc/doc/sourcebuild.texi
@@ -2167,6 +2167,10 @@ ARM target supports options to generate instructions from ARMv8.1-M with
the Custom Datapath Extension (CDE) and M-Profile Vector Extension (MVE).
Some multilibs may be incompatible with these options.
+@item arm_pacbti_hw
+Test system supports executing Pointer Authentication and Branch Target
+Identification instructions.
+
@item arm_prefer_ldrd_strd
ARM target prefers @code{LDRD} and @code{STRD} instructions over
@code{LDM} and @code{STM} instructions.
@@ -2256,6 +2260,12 @@ ARM target generates Thumb-2 code for @code{-mthumb} but does not
support executing the Armv8.1-M Mainline Low Overhead Loop
instructions @code{DLS} and @code{LE}.
+@item mbranch_protection_ok
+ARM target supporting @code{-mbranch-protection=standard}.
+
+@item arm_pacbti_hw
+Test system supports for executing non nop pacbti instructions.
+
@end table
@subsubsection AArch64-specific attributes
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 244fe2306f4..32fe525f8a5 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -5123,6 +5123,22 @@ proc check_effective_target_arm_cmse_clear_ok {} {
} "-mcmse"];
}
+# Return 1 if the target supports executing PACBTI instructions, 0
+# otherwise.
+
+proc check_effective_target_arm_pacbti_hw {} {
+ return [check_runtime arm_pacbti_hw_available {
+ __attribute__ ((naked)) int
+ main (void)
+ {
+ asm ("pac r12, lr, sp");
+ asm ("mov r0, #0");
+ asm ("autg r12, lr, sp");
+ asm ("bx lr");
+ }
+ } "-march=armv8.1-m.main+pacbti+fp -mbranch-protection=standard -mthumb -mfloat-abi=hard"]
+}
+
# Return 1 if this compilation turns on string_ops_prefer_neon on.
proc check_effective_target_arm_tune_string_ops_prefer_neon { } {
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