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Author	SHA1	Message	Date
Nikita Popov	e235fcb582	[BOLT] Only link and initialize supported targets (#127509 ) Bolt currently links and initializes all LLVM targets. This substantially increases the binary size, and link time if LTO is used. Instead, only link the targets specified by BOLT_TARGETS_TO_BUILD. We also have to only initialize those targets, so generate a TargetConfig.def file with the necessary information. The way the initialization is done mirrors what llvm-exegesis does. This reduces llvm-bolt size from 137MB to 78MB for me.	2025-02-18 09:17:51 +01:00
Kristof Beyls	ceb7214be0	[BOLT] Introduce binary analysis tool based on BOLT (#115330 ) This initial commit does not add any specific binary analyses yet, it merely contains the boilerplate to introduce a new BOLT-based tool. This basically combines the 4 first patches from the prototype pac-ret and stack-clash binary analyzer discussed in RFC https://discourse.llvm.org/t/rfc-bolt-based-binary-analysis-tool-to-verify-correctness-of-security-hardening/78148 and published at https://github.com/llvm/llvm-project/compare/main...kbeyls:llvm-project:bolt-gadget-scanner-prototype The introduction of such a BOLT-based binary analysis tool was proposed and discussed in at least the following places: - The RFC pointed to above - EuroLLVM 2024 round table https://discourse.llvm.org/t/summary-of-bolt-as-a-binary-analysis-tool-round-table-at-eurollvm/78441 The round table showed quite a few people interested in being able to build a custom binary analysis quickly with a tool like this. - Also at the US LLVM dev meeting a few weeks ago, I heard interest from a few people, asking when the tool would be available upstream. - The presentation "Adding Pointer Authentication ABI support for your ELF platform" (https://llvm.swoogo.com/2024devmtg/session/2512720/adding-pointer-authentication-abi-support-for-your-elf-platform) explicitly mentioned interest to extend the prototype tool to verify correct implementation of pauthabi.	2024-12-12 10:06:27 +00:00

Author

SHA1

Message

Date

Nikita Popov

e235fcb582

[BOLT] Only link and initialize supported targets (#127509 )

Bolt currently links and initializes all LLVM targets. This
substantially increases the binary size, and link time if LTO is used.

Instead, only link the targets specified by BOLT_TARGETS_TO_BUILD. We
also have to only initialize those targets, so generate a
TargetConfig.def file with the necessary information. The way the
initialization is done mirrors what llvm-exegesis does.

This reduces llvm-bolt size from 137MB to 78MB for me.

2025-02-18 09:17:51 +01:00

Kristof Beyls

ceb7214be0

[BOLT] Introduce binary analysis tool based on BOLT (#115330 )

This initial commit does not add any specific binary analyses yet, it
merely contains the boilerplate to introduce a new BOLT-based tool.

This basically combines the 4 first patches from the prototype pac-ret
and stack-clash binary analyzer discussed in RFC
https://discourse.llvm.org/t/rfc-bolt-based-binary-analysis-tool-to-verify-correctness-of-security-hardening/78148
and published at
https://github.com/llvm/llvm-project/compare/main...kbeyls:llvm-project:bolt-gadget-scanner-prototype

The introduction of such a BOLT-based binary analysis tool was proposed
and discussed in at least the following places:
- The RFC pointed to above
- EuroLLVM 2024 round table
https://discourse.llvm.org/t/summary-of-bolt-as-a-binary-analysis-tool-round-table-at-eurollvm/78441
The round table showed quite a few people interested in being able to
build a custom binary analysis quickly with a tool like this.
- Also at the US LLVM dev meeting a few weeks ago, I heard interest from
a few people, asking when the tool would be available upstream.
- The presentation "Adding Pointer Authentication ABI support for your
ELF platform"
(https://llvm.swoogo.com/2024devmtg/session/2512720/adding-pointer-authentication-abi-support-for-your-elf-platform)
explicitly mentioned interest to extend the prototype tool to verify
correct implementation of pauthabi.

2024-12-12 10:06:27 +00:00

2 Commits