Add aarch64_be-unknown-hermit target

compiler/rustc_target/src/spec/mod.rs

@@ -2116,6 +2116,7 @@ supported_targets! {
 
     ("msp430-none-elf", msp430_none_elf),
 
+    ("aarch64_be-unknown-hermit", aarch64_be_unknown_hermit),
     ("aarch64-unknown-hermit", aarch64_unknown_hermit),
     ("riscv64gc-unknown-hermit", riscv64gc_unknown_hermit),
     ("x86_64-unknown-hermit", x86_64_unknown_hermit),

compiler/rustc_target/src/spec/targets/aarch64_be_unknown_hermit.rs

@@ -0,0 +1,25 @@
+use rustc_abi::Endian;
+
+use crate::spec::{StackProbeType, Target, TargetMetadata, TargetOptions, base};
+
+pub(crate) fn target() -> Target {
+    Target {
+        llvm_target: "aarch64_be-unknown-hermit".into(),
+        metadata: TargetMetadata {
+            description: Some("ARM64 Hermit (big-endian)".into()),
+            tier: Some(3),
+            host_tools: Some(false),
+            std: Some(true),
+        },
+        pointer_width: 64,
+        arch: "aarch64".into(),
+        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(),
+        options: TargetOptions {
+            features: "+v8a,+strict-align,+neon,+fp-armv8".into(),
+            max_atomic_width: Some(128),
+            stack_probes: StackProbeType::Inline,
+            endian: Endian::Big,
+            ..base::hermit::opts()
+        },
+    }
+}

src/bootstrap/src/core/sanity.rs

@@ -35,6 +35,7 @@ pub struct Finder {
 const STAGE0_MISSING_TARGETS: &[&str] = &[
     "armv7a-vex-v5",
     // just a dummy comment so the list doesn't get onelined
+    "aarch64_be-unknown-hermit",
     "aarch64_be-unknown-none-softfloat",
 ];
 

src/doc/rustc/src/platform-support.md

@@ -270,6 +270,7 @@ target | std | host | notes
 [`aarch64-unknown-trusty`](platform-support/trusty.md) | ✓ |  |
 [`aarch64-uwp-windows-msvc`](platform-support/uwp-windows-msvc.md) | ✓ |  |
 [`aarch64-wrs-vxworks`](platform-support/vxworks.md) | ✓ |  | ARM64 VxWorks OS
+[`aarch64_be-unknown-hermit`](platform-support/hermit.md) | ✓ |  | ARM64 Hermit (big-endian)
 `aarch64_be-unknown-linux-gnu` | ✓ | ✓ | ARM64 Linux (big-endian)
 `aarch64_be-unknown-linux-gnu_ilp32` | ✓ | ✓ | ARM64 Linux (big-endian, ILP32 ABI)
 [`aarch64_be-unknown-netbsd`](platform-support/netbsd.md) | ✓ | ✓ | ARM64 NetBSD (big-endian)

src/doc/rustc/src/platform-support/hermit.md

@@ -10,6 +10,7 @@ Target triplets available so far:
 
 - `x86_64-unknown-hermit`
 - `aarch64-unknown-hermit`
+- `aarch64_be-unknown-hermit`
 - `riscv64gc-unknown-hermit`
 
 ## Target maintainers
@@ -42,6 +43,7 @@ target = [
     "<HOST_TARGET>",
     "x86_64-unknown-hermit",
     "aarch64-unknown-hermit",
+    "aarch64_be-unknown-hermit",
     "riscv64gc-unknown-hermit",
 ]
 

tests/assembly-llvm/targets/targets-elf.rs

@@ -1,6 +1,9 @@
 //@ add-core-stubs
 //@ assembly-output: emit-asm
 // ignore-tidy-linelength
+//@ revisions: aarch64_be_unknown_hermit
+//@ [aarch64_be_unknown_hermit] compile-flags: --target aarch64_be-unknown-hermit
+//@ [aarch64_be_unknown_hermit] needs-llvm-components: aarch64
 //@ revisions: aarch64_be_unknown_linux_gnu
 //@ [aarch64_be_unknown_linux_gnu] compile-flags: --target aarch64_be-unknown-linux-gnu
 //@ [aarch64_be_unknown_linux_gnu] needs-llvm-components: aarch64