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rustc: implement support for riscv32im_risc0_zkvm_elf

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This also adds changes in the rust test suite in order to get a few of them to
pass.

Co-authored-by: Frank Laub <flaub@risc0.com>
Co-authored-by: Urgau <3616612+Urgau@users.noreply.github.com>
This commit is contained in:
Erik Kaneda 2023-11-15 16:57:32 -08:00
parent 06fbe07901
commit 966b94e0a2
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8 changed files with 79 additions and 2 deletions
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1
compiler/rustc_target/src/spec/mod.rs
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@ -1597,6 +1597,7 @@ supported_targets! {
("x86_64-unikraft-linux-musl", x86_64_unikraft_linux_musl),
("riscv32i-unknown-none-elf", riscv32i_unknown_none_elf),
("riscv32im-risc0-zkvm-elf", riscv32im_risc0_zkvm_elf),
("riscv32im-unknown-none-elf", riscv32im_unknown_none_elf),
("riscv32imc-unknown-none-elf", riscv32imc_unknown_none_elf),
("riscv32imc-esp-espidf", riscv32imc_esp_espidf),

36
compiler/rustc_target/src/spec/targets/riscv32im_risc0_zkvm_elf.rs Normal file
View file

@ -0,0 +1,36 @@
use crate::spec::{Cc, LinkerFlavor, Lld, PanicStrategy, RelocModel};
use crate::spec::{Target, TargetOptions};
pub fn target() -> Target {
Target {
data_layout: "e-m:e-p:32:32-i64:64-n32-S128".into(),
llvm_target: "riscv32".into(),
pointer_width: 32,
arch: "riscv32".into(),
options: TargetOptions {
os: "zkvm".into(),
vendor: "risc0".into(),
linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes),
linker: Some("rust-lld".into()),
cpu: "generic-rv32".into(),
// Some crates (*cough* crossbeam) assume you have 64 bit
// atomics if the target name is not in a hardcoded list.
// Since zkvm is singlethreaded and all operations are
// atomic, I guess we can just say we support 64-bit
// atomics.
max_atomic_width: Some(64),
atomic_cas: true,
features: "+m".into(),
executables: true,
panic_strategy: PanicStrategy::Abort,
relocation_model: RelocModel::Static,
emit_debug_gdb_scripts: false,
eh_frame_header: false,
singlethread: true,
..Default::default()
},
}
}