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CHERI-RISC-V needs new vararg and memarg calling convention #745

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dpgao opened this issue Jul 2, 2024 · 1 comment
Open

CHERI-RISC-V needs new vararg and memarg calling convention #745

dpgao opened this issue Jul 2, 2024 · 1 comment
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ABI breaking change CheriABI RISC-V

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@dpgao
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dpgao commented Jul 2, 2024 •
edited by jrtc27
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Morello LLVM now passes varargs and memargs via a buffer pointed to by a capability register (https://git.morello-project.org/morello/llvm-project/-/merge_requests/204). This is needed for library-based compartmentalisation to function securely.

The same calling convention should be implemented for CHERI-RISC-V.
@jrtc27 jrtc27 changed the title RISC-V needs new vararg and memarg calling convention CHERI-RISC-V needs new vararg and memarg calling convention Jul 2, 2024
@rwatson
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rwatson commented Jul 2, 2024

Tagging @arichardson who will be interested in this issue, as well as @brooksdavis and @gvnn3 for tracking purposes.

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@rwatson @jrtc27 @dpgao