Add RISC-V vxworks targets

compiler/rustc_target/src/spec/mod.rs

@@ -1842,6 +1842,8 @@ supported_targets! {
     ("powerpc-wrs-vxworks", powerpc_wrs_vxworks),
     ("powerpc-wrs-vxworks-spe", powerpc_wrs_vxworks_spe),
     ("powerpc64-wrs-vxworks", powerpc64_wrs_vxworks),
+    ("riscv32-wrs-vxworks", riscv32_wrs_vxworks),
+    ("riscv64-wrs-vxworks", riscv64_wrs_vxworks),
 
     ("aarch64-kmc-solid_asp3", aarch64_kmc_solid_asp3),
     ("armv7a-kmc-solid_asp3-eabi", armv7a_kmc_solid_asp3_eabi),

compiler/rustc_target/src/spec/targets/aarch64_wrs_vxworks.rs

@@ -7,7 +7,7 @@ pub(crate) fn target() -> Target {
             description: None,
             tier: Some(3),
             host_tools: Some(false),
-            std: None, // ?
+            std: Some(true),
         },
         pointer_width: 64,
         data_layout: "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32".into(),

compiler/rustc_target/src/spec/targets/i686_wrs_vxworks.rs

@@ -13,7 +13,7 @@ pub(crate) fn target() -> Target {
             description: None,
             tier: Some(3),
             host_tools: Some(false),
-            std: None, // ?
+            std: Some(true),
         },
         pointer_width: 32,
         data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\

compiler/rustc_target/src/spec/targets/powerpc64_wrs_vxworks.rs

@@ -14,7 +14,7 @@ pub(crate) fn target() -> Target {
             description: None,
             tier: Some(3),
             host_tools: Some(false),
-            std: None, // ?
+            std: Some(true),
         },
         pointer_width: 64,
         data_layout: "E-m:e-Fi64-i64:64-n32:64-S128-v256:256:256-v512:512:512".into(),

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

@@ -13,7 +13,7 @@ pub(crate) fn target() -> Target {
             description: None,
             tier: Some(3),
             host_tools: Some(false),
-            std: None, // ?
+            std: Some(true),
         },
         pointer_width: 32,
         data_layout: "E-m:e-p:32:32-Fn32-i64:64-n32".into(),

compiler/rustc_target/src/spec/targets/riscv32_wrs_vxworks.rs

@@ -0,0 +1,24 @@
+use crate::spec::{StackProbeType, Target, TargetOptions, base};
+
+pub(crate) fn target() -> Target {
+    Target {
+        llvm_target: "riscv32".into(),
+        metadata: crate::spec::TargetMetadata {
+            description: None,
+            tier: Some(3),
+            host_tools: Some(false),
+            std: Some(true),
+        },
+        pointer_width: 32,
+        data_layout: "e-m:e-p:32:32-i64:64-n32-S128".into(),
+        arch: "riscv32".into(),
+        options: TargetOptions {
+            cpu: "generic-rv32".into(),
+            llvm_abiname: "ilp32d".into(),
+            max_atomic_width: Some(32),
+            features: "+m,+a,+f,+d,+c".into(),
+            stack_probes: StackProbeType::Inline,
+            ..base::vxworks::opts()
+        },
+    }
+}

compiler/rustc_target/src/spec/targets/riscv64_wrs_vxworks.rs

@@ -0,0 +1,24 @@
+use crate::spec::{StackProbeType, Target, TargetOptions, base};
+
+pub(crate) fn target() -> Target {
+    Target {
+        llvm_target: "riscv64".into(),
+        metadata: crate::spec::TargetMetadata {
+            description: None,
+            tier: Some(3),
+            host_tools: Some(false),
+            std: Some(true),
+        },
+        pointer_width: 64,
+        data_layout: "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128".into(),
+        arch: "riscv64".into(),
+        options: TargetOptions {
+            cpu: "generic-rv64".into(),
+            llvm_abiname: "lp64d".into(),
+            max_atomic_width: Some(64),
+            features: "+m,+a,+f,+d,+c".into(),
+            stack_probes: StackProbeType::Inline,
+            ..base::vxworks::opts()
+        },
+    }
+}

compiler/rustc_target/src/spec/targets/x86_64_wrs_vxworks.rs

@@ -15,7 +15,7 @@ pub(crate) fn target() -> Target {
             description: None,
             tier: Some(3),
             host_tools: Some(false),
-            std: None, // ?
+            std: Some(true),
         },
         pointer_width: 64,
         data_layout:

library/std/src/sys/alloc/unix.rs

@@ -71,6 +71,7 @@ cfg_if::cfg_if! {
         }
     } else {
         #[inline]
+        #[cfg_attr(target_os = "vxworks", allow(unused_unsafe))]
         unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
             let mut out = ptr::null_mut();
             // We prefer posix_memalign over aligned_alloc since it is more widely available, and

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

@@ -358,12 +358,14 @@ target | std | host | notes
 [`riscv32imc-esp-espidf`](platform-support/esp-idf.md) | ✓ |  | RISC-V ESP-IDF
 [`riscv32imac-esp-espidf`](platform-support/esp-idf.md) | ✓ |  | RISC-V ESP-IDF
 [`riscv32imafc-esp-espidf`](platform-support/esp-idf.md) | ✓ |  | RISC-V ESP-IDF
+[`riscv32-wrs-vxworks`](platform-support/vxworks.md) | ✓ |  |
 [`riscv64gc-unknown-hermit`](platform-support/hermit.md) | ✓ |   | RISC-V Hermit
 `riscv64gc-unknown-freebsd` |   |   | RISC-V FreeBSD
 `riscv64gc-unknown-fuchsia` |   |   | RISC-V Fuchsia
 [`riscv64gc-unknown-netbsd`](platform-support/netbsd.md) | ✓ | ✓ | RISC-V NetBSD
 [`riscv64gc-unknown-openbsd`](platform-support/openbsd.md) | ✓ | ✓ | OpenBSD/riscv64
 [`riscv64-linux-android`](platform-support/android.md) |   |   | RISC-V 64-bit Android
+[`riscv64-wrs-vxworks`](platform-support/vxworks.md) | ✓ |  |
 `s390x-unknown-linux-musl` |  |  | S390x Linux (kernel 3.2, musl 1.2.3)
 `sparc-unknown-linux-gnu` | ✓ |  | 32-bit SPARC Linux
 [`sparc-unknown-none-elf`](./platform-support/sparc-unknown-none-elf.md) | * |  | Bare 32-bit SPARC V7+

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

@@ -14,6 +14,8 @@ Target triplets available:
 - `powerpc-wrs-vxworks`
 - `powerpc64-wrs-vxworks`
 - `powerpc-wrs-vxworks-spe`
+- `riscv32-wrs-vxworks`
+- `riscv64-wrs-vxworks`
 
 ## Target maintainers
 

tests/assembly/targets/targets-elf.rs

@@ -372,6 +372,9 @@
 //@ revisions: powerpc_wrs_vxworks_spe
 //@ [powerpc_wrs_vxworks_spe] compile-flags: --target powerpc-wrs-vxworks-spe
 //@ [powerpc_wrs_vxworks_spe] needs-llvm-components: powerpc
+//@ revisions: riscv32_wrs_vxworks
+//@ [riscv32_wrs_vxworks] compile-flags: --target riscv32-wrs-vxworks
+//@ [riscv32_wrs_vxworks] needs-llvm-components: riscv
 //@ revisions: riscv32gc_unknown_linux_gnu
 //@ [riscv32gc_unknown_linux_gnu] compile-flags: --target riscv32gc-unknown-linux-gnu
 //@ [riscv32gc_unknown_linux_gnu] needs-llvm-components: riscv
@@ -414,6 +417,9 @@
 //@ revisions: riscv64_linux_android
 //@ [riscv64_linux_android] compile-flags: --target riscv64-linux-android
 //@ [riscv64_linux_android] needs-llvm-components: riscv
+//@ revisions: riscv64_wrs_vxworks
+//@ [riscv64_wrs_vxworks] compile-flags: --target riscv64-wrs-vxworks
+//@ [riscv64_wrs_vxworks] needs-llvm-components: riscv
 //@ revisions: riscv64gc_unknown_freebsd
 //@ [riscv64gc_unknown_freebsd] compile-flags: --target riscv64gc-unknown-freebsd
 //@ [riscv64gc_unknown_freebsd] needs-llvm-components: riscv