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Revision tags: llvmorg-21-init, llvmorg-19.1.7, llvmorg-19.1.6, llvmorg-19.1.5, llvmorg-19.1.4, llvmorg-19.1.3, llvmorg-19.1.2, llvmorg-19.1.1, llvmorg-19.1.0, llvmorg-19.1.0-rc4, llvmorg-19.1.0-rc3 |
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| #
d06303ff |
| 07-Aug-2024 |
Oliver Stannard <oliver.stannard@arm.com> |
[ARM] t2CALL_BTI pseudo-inst clobbers LR (#102117)
The t2CALL_BTI pseudo-instruction expands to a tBL instruction, so needs
the same implicit uses and defs as it.
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Revision tags: llvmorg-19.1.0-rc2, llvmorg-19.1.0-rc1, llvmorg-20-init |
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| #
1782810b |
| 10-Jul-2024 |
Daniel Kiss <daniel.kiss@arm.com> |
[Clang][ARM][AArch64] Alway emit protection attributes for functions. (#82819)
So far branch protection, sign return address, guarded control stack
attributes are
only emitted as module flags to ind
[Clang][ARM][AArch64] Alway emit protection attributes for functions. (#82819)
So far branch protection, sign return address, guarded control stack
attributes are
only emitted as module flags to indicate the functions need to be
generated with
those features.
The problem is in case of an LTO build the module flags are merged with
the `min`
rule which means if one of the module is not build with sign return
address then the features
will be turned off for all functions. Due to the functions take the
branch-protection and
sign-return-address features from the module flags. The
sign-return-address is
function level option therefore it is expected functions from files that
is
compiled with -mbranch-protection=pac-ret to be protected.
The inliner might inline functions with different set of flags as it
doesn't consider
the module flags.
This patch adds the attributes to all functions and drops the checking
of the module flags
for the code generation.
Module flag is still used for generating the ELF markers.
Also drops the "true"/"false" values from the
branch-protection-enforcement,
branch-protection-pauth-lr, guarded-control-stack attributes as presence
of the
attribute means it is on absence means off and no other option.
Releand with test fixes.
show more ...
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| #
4b2daecc |
| 10-Jul-2024 |
Daniel Kiss <daniel.kiss@arm.com> |
Revert "[Clang][ARM][AArch64] Alway emit protection attributes for functions." (#98284)
Reverts llvm/llvm-project#82819
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| #
e15d67cf |
| 10-Jul-2024 |
Daniel Kiss <daniel.kiss@arm.com> |
[Clang][ARM][AArch64] Alway emit protection attributes for functions. (#82819)
So far branch protection, sign return address, guarded control stack
attributes are
only emitted as module flags to i
[Clang][ARM][AArch64] Alway emit protection attributes for functions. (#82819)
So far branch protection, sign return address, guarded control stack
attributes are
only emitted as module flags to indicate the functions need to be
generated with
those features.
The problem is in case of an LTO build the module flags are merged with
the `min`
rule which means if one of the module is not build with sign return
address then the features
will be turned off for all functions. Due to the functions take the
branch-protection and
sign-return-address features from the module flags. The
sign-return-address is
function level option therefore it is expected functions from files that
is
compiled with -mbranch-protection=pac-ret to be protected.
The inliner might inline functions with different set of flags as it
doesn't consider
the module flags.
This patch adds the attributes to all functions and drops the checking
of the module flags
for the code generation.
Module flag is still used for generating the ELF markers.
Also drops the "true"/"false" values from the
branch-protection-enforcement,
branch-protection-pauth-lr, guarded-control-stack attributes as presence
of the
attribute means it is on absence means off and no other option.
show more ...
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Revision tags: llvmorg-18.1.8, llvmorg-18.1.7, llvmorg-18.1.6, llvmorg-18.1.5, llvmorg-18.1.4, llvmorg-18.1.3, llvmorg-18.1.2, llvmorg-18.1.1, llvmorg-18.1.0, llvmorg-18.1.0-rc4, llvmorg-18.1.0-rc3, llvmorg-18.1.0-rc2, llvmorg-18.1.0-rc1, llvmorg-19-init, llvmorg-17.0.6, llvmorg-17.0.5, llvmorg-17.0.4, llvmorg-17.0.3, llvmorg-17.0.2, llvmorg-17.0.1, llvmorg-17.0.0, llvmorg-17.0.0-rc4, llvmorg-17.0.0-rc3, llvmorg-17.0.0-rc2, llvmorg-17.0.0-rc1, llvmorg-18-init, llvmorg-16.0.6, llvmorg-16.0.5, llvmorg-16.0.4, llvmorg-16.0.3, llvmorg-16.0.2, llvmorg-16.0.1, llvmorg-16.0.0, llvmorg-16.0.0-rc4, llvmorg-16.0.0-rc3, llvmorg-16.0.0-rc2, llvmorg-16.0.0-rc1, llvmorg-17-init, llvmorg-15.0.7 |
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| #
bed1c7f0 |
| 19-Dec-2022 |
Nikita Popov <npopov@redhat.com> |
[ARM] Convert some tests to opaque pointers (NFC)
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Revision tags: llvmorg-15.0.6, llvmorg-15.0.5, llvmorg-15.0.4, llvmorg-15.0.3, working, llvmorg-15.0.2, llvmorg-15.0.1, llvmorg-15.0.0, llvmorg-15.0.0-rc3, llvmorg-15.0.0-rc2, llvmorg-15.0.0-rc1, llvmorg-16-init, llvmorg-14.0.6, llvmorg-14.0.5, llvmorg-14.0.4, llvmorg-14.0.3, llvmorg-14.0.2 |
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| #
b0343a38 |
| 13-Apr-2022 |
Daniel Kiss <daniel.kiss@arm.com> |
Support the min of module flags when linking, use for AArch64 BTI/PAC-RET
LTO objects might compiled with different `mbranch-protection` flags which will cause an error in the linker.
Such a setup i
Support the min of module flags when linking, use for AArch64 BTI/PAC-RET
LTO objects might compiled with different `mbranch-protection` flags which will cause an error in the linker.
Such a setup is allowed in the normal build with this change that is possible.
Reviewed By: pcc
Differential Revision: https://reviews.llvm.org/D123493
show more ...
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Revision tags: llvmorg-14.0.1, llvmorg-14.0.0, llvmorg-14.0.0-rc4, llvmorg-14.0.0-rc3, llvmorg-14.0.0-rc2, llvmorg-14.0.0-rc1, llvmorg-15-init, llvmorg-13.0.1, llvmorg-13.0.1-rc3, llvmorg-13.0.1-rc2 |
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| #
0fbb1745 |
| 06-Dec-2021 |
Ties Stuij <ties.stuij@arm.com> |
[ARM] Implement setjmp BTI placement for PACBTI-M
This patch intends to guard indirect branches performed by longjmp
by inserting BTI instructions after calls to setjmp.
Calls with 'returns-twice'
[ARM] Implement setjmp BTI placement for PACBTI-M
This patch intends to guard indirect branches performed by longjmp
by inserting BTI instructions after calls to setjmp.
Calls with 'returns-twice' are lowered to a new pseudo-instruction
named t2CALL_BTI that is later expanded to a bundle of {tBL,t2BTI}.
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
The following people contributed to this patch:
- Alexandros Lamprineas
- Ties Stuij
Reviewed By: labrinea
Differential Revision: https://reviews.llvm.org/D112427
show more ...
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