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Auto merge of #79608 - alessandrod:bpf, r=nagisa

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BPF target support

This adds `bpfel-unknown-none` and `bpfeb-unknown-none`, two new no_std targets that generate little and big endian BPF. The approach taken is very similar to the cuda target, where `TargetOptions::obj_is_bitcode` is enabled and code generation is done by the linker.

I added the targets to `dist-various-2`. There are [some tests](https://github.com/alessandrod/bpf-linker/tree/main/tests/assembly) in bpf-linker and I'm planning to add more. Those are currently not ran as part of rust CI.
This commit is contained in:
bors 2021-06-06 01:02:32 +00:00
commit f434217aab
33 changed files with 603 additions and 6 deletions
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6
compiler/rustc_target/src/spec/mod.rs
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@ -57,6 +57,7 @@ mod apple_base;
mod apple_sdk_base;
mod arm_base;
mod avr_gnu_base;
mod bpf_base;
mod dragonfly_base;
mod freebsd_base;
mod fuchsia_base;
@ -93,6 +94,7 @@ pub enum LinkerFlavor {
Msvc,
Lld(LldFlavor),
PtxLinker,
BpfLinker,
}
#[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
@ -161,6 +163,7 @@ flavor_mappings! {
((LinkerFlavor::Ld), "ld"),
((LinkerFlavor::Msvc), "msvc"),
((LinkerFlavor::PtxLinker), "ptx-linker"),
((LinkerFlavor::BpfLinker), "bpf-linker"),
((LinkerFlavor::Lld(LldFlavor::Wasm)), "wasm-ld"),
((LinkerFlavor::Lld(LldFlavor::Ld64)), "ld64.lld"),
((LinkerFlavor::Lld(LldFlavor::Ld)), "ld.lld"),
@ -897,6 +900,9 @@ supported_targets! {
("aarch64_be-unknown-linux-gnu", aarch64_be_unknown_linux_gnu),
("aarch64-unknown-linux-gnu_ilp32", aarch64_unknown_linux_gnu_ilp32),
("aarch64_be-unknown-linux-gnu_ilp32", aarch64_be_unknown_linux_gnu_ilp32),
("bpfeb-unknown-none", bpfeb_unknown_none),
("bpfel-unknown-none", bpfel_unknown_none),
}
/// Everything `rustc` knows about how to compile for a specific target.