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authorMatthias Krüger <matthias.krueger@famsik.de>2025-01-31 12:28:17 +0100
committerGitHub <noreply@github.com>2025-01-31 12:28:17 +0100
commit12a7f06e3c9207fd6b7b66fd51b995bb879514bc (patch)
tree903f8711a95fc274e637902f0e5f7f8b87f771ed /compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
parentf818842ce2454ce9eea3df49cf6a822a2364a2f0 (diff)
parente586382febf7d03ac330595dcf578184fccbd971 (diff)
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Rollup merge of #136194 - taiki-e:bpf-clobber-abi, r=amanieu
Support clobber_abi in BPF inline assembly

This supports [`clobber_abi`](https://doc.rust-lang.org/nightly/reference/inline-assembly.html#abi-clobbers) which is one of the requirements of stabilization mentioned in the tracking Issue for `asm_experimental_arch` (#93335).

Refs: [Section 1.1 "Registers and calling convention" in BPF ABI Recommended Conventions and Guidelines v1.0](https://github.com/torvalds/linux/blob/v6.13/Documentation/bpf/standardization/abi.rst#11registers-and-calling-convention)
> R0 - R5 are scratch registers and BPF programs needs to spill/fill them if necessary across calls.

cc `@alessandrod` `@dave-tucker` `@tamird` `@vadorovsky` (target maintainers mentioned in platform support document which will be added by https://github.com/rust-lang/rust/pull/135107)

r? `@Amanieu`

`@rustbot` label +O-eBPF +A-inline-assembly
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