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[ARM][clang] Add back branch protection tests When committing the PACBTI-M frontend support patch (https://reviews.llvm.org/D112421), the tests in arm-invalid-branch-protection.c were failing on certain test setups, so it was removed to make the llvm test suite pass. The fix is to require arm-registered-target. This patch is part of a series that adds support for the PACBTI-M extension of the Armv8.1-M architecture, as detailed here: https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/armv8-1-m-pointer-authentication-and-branch-target-identification-extension The PACBTI-M specification can be found in the Armv8-M Architecture Reference Manual: https://developer.arm.com/documentation/ddi0553/latest Reviewed By: erichkeane Differential Revision: https://reviews.llvm.org/D115141
2021-12-06 23:03:14 +08:00
// REQUIRES: arm-registered-target
[clang][ARM] Emit warnings when PACBTI-M is used with unsupported architectures Branch protection in M-class is supported by - Armv8.1-M.Main - Armv8-M.Main - Armv7-M Attempting to enable this for other architectures, either by command-line (e.g -mbranch-protection=bti) or by target attribute in source code (e.g. __attribute__((target("branch-protection=..."))) ) will generate a warning. In both cases function attributes related to branch protection will not be emitted. Regardless of the warning, module level attributes related to branch protection will be emitted when it is enabled via the command-line. The following people also contributed to this patch: - Victor Campos Reviewed By: chill Differential Revision: https://reviews.llvm.org/D115501
2022-01-28 17:58:08 +08:00
// RUN: %clang -target arm-arm-none-eabi -march=armv8.1-m.main -mbranch-protection=pac-ret+b-key -c %s -o /dev/null 2>&1 | FileCheck %s
// RUN: %clang -target arm-arm-none-eabi -march=armv8.1-m.main -mbranch-protection=pac-ret+b-key+leaf -c %s -o /dev/null 2>&1 | FileCheck %s
// RUN: %clang -target arm-arm-none-eabi -march=armv8.1-m.main -mbranch-protection=bti+pac-ret+b-key -c %s -o /dev/null 2>&1 | FileCheck %s
// RUN: %clang -target arm-arm-none-eabi -march=armv8.1-m.main -mbranch-protection=bti+pac-ret+b-key+leaf -c %s -o /dev/null 2>&1 | FileCheck %s
[ARM][clang] Add back branch protection tests When committing the PACBTI-M frontend support patch (https://reviews.llvm.org/D112421), the tests in arm-invalid-branch-protection.c were failing on certain test setups, so it was removed to make the llvm test suite pass. The fix is to require arm-registered-target. This patch is part of a series that adds support for the PACBTI-M extension of the Armv8.1-M architecture, as detailed here: https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/armv8-1-m-pointer-authentication-and-branch-target-identification-extension The PACBTI-M specification can be found in the Armv8-M Architecture Reference Manual: https://developer.arm.com/documentation/ddi0553/latest Reviewed By: erichkeane Differential Revision: https://reviews.llvm.org/D115141
2021-12-06 23:03:14 +08:00
// CHECK: warning: invalid branch protection option 'b-key' in '-mbranch-protection={{[a-z+-]*}}' [-Wbranch-protection]