compiler/rustc_target/src/spec/targets/aarch64_unknown_linux_gnu.rs

use crate::spec::{
    Arch, Cc, FramePointer, LinkerFlavor, Lld, SanitizerSet, StackProbeType, Target,
    TargetMetadata, TargetOptions, base,
};

pub(crate) fn target() -> Target {
    Target {
        llvm_target: "aarch64-unknown-linux-gnu".into(),
        metadata: TargetMetadata {
            description: Some("ARM64 Linux (kernel 4.1, glibc 2.17+)".into()),
            tier: Some(1),
            host_tools: Some(true),
            std: Some(true),
        },
        pointer_width: 64,
        data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32".into(),
        arch: Arch::AArch64,
        options: TargetOptions {
            // Enable the Cortex-A53 errata 843419 mitigation by default
            pre_link_args: TargetOptions::link_args(
                LinkerFlavor::Gnu(Cc::Yes, Lld::No),
                &["-Wl,--fix-cortex-a53-843419"],
            ),
            features: "+v8a,+outline-atomics".into(),
            // the AAPCS64 expects use of non-leaf frame pointers per
            // https://github.com/ARM-software/abi-aa/blob/4492d1570eb70c8fd146623e0db65b2d241f12e7/aapcs64/aapcs64.rst#the-frame-pointer
            // and we tend to encounter interesting bugs in AArch64 unwinding code if we do not
            frame_pointer: FramePointer::NonLeaf,
            mcount: "\u{1}_mcount".into(),
            max_atomic_width: Some(128),
            stack_probes: StackProbeType::Inline,
            supported_sanitizers: SanitizerSet::ADDRESS
                | SanitizerSet::CFI
                | SanitizerSet::KCFI
                | SanitizerSet::LEAK
                | SanitizerSet::MEMORY
                | SanitizerSet::MEMTAG
                | SanitizerSet::THREAD
                | SanitizerSet::HWADDRESS
                | SanitizerSet::REALTIME,
            supports_xray: true,
            ..base::linux_gnu::opts()
        },
    }
}