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1f08b08674
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
8 lines
718 B
C
8 lines
718 B
C
// REQUIRES: arm-registered-target
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// 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
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// 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
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// 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
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// 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
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// CHECK: warning: invalid branch protection option 'b-key' in '-mbranch-protection={{[a-z+-]*}}' [-Wbranch-protection]
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