Add Apple visionOS support

Cargo.toml

@@ -162,7 +162,7 @@ untrusted = { version = "0.9" }
 [target.'cfg(any(target_arch = "aarch64", target_arch = "arm", target_arch = "x86",target_arch = "x86_64"))'.dependencies]
 spin = { version = "0.9.8", default-features = false, features = ["once"] }
 
-[target.'cfg(all(any(target_os = "android", target_os = "linux", any(target_os = "ios", target_os = "macos", target_os = "tvos")), any(target_arch = "aarch64", target_arch = "arm")))'.dependencies]
+[target.'cfg(all(any(target_os = "android", target_os = "linux", any(target_os = "ios", target_os = "visionos", target_os = "macos", target_os = "tvos")), any(target_arch = "aarch64", target_arch = "arm")))'.dependencies]
 libc = { version = "0.2.148", default-features = false }
 
 [target.'cfg(all(target_arch = "aarch64", target_os = "windows"))'.dependencies]
@@ -175,7 +175,7 @@ wasm-bindgen-test = { version = "0.3.37", default-features = false }
 libc = { version = "0.2.148", default-features = false }
 
 [build-dependencies]
-cc = { version = "1.0.83", default-features = false }
+cc = { version = "1.0.94", default-features = false }
 
 [features]
 # These features are documented in the top-level module's documentation.

build.rs

@@ -197,6 +197,11 @@ const ASM_TARGETS: &[AsmTarget] = &[
         arch: AARCH64,
         perlasm_format: "ios64",
     },
+    AsmTarget {
+        oss: MACOS_ABI,
+        arch: AARCH64,
+        perlasm_format: "visionos64",
+    },
     AsmTarget {
         oss: MACOS_ABI,
         arch: X86_64,
@@ -257,7 +262,7 @@ const NASM: &str = "nasm";
 
 /// Operating systems that have the same ABI as macOS on every architecture
 /// mentioned in `ASM_TARGETS`.
-const MACOS_ABI: &[&str] = &["ios", MACOS, "tvos"];
+const MACOS_ABI: &[&str] = &["ios", MACOS, "tvos", "visionos"];
 
 const MACOS: &str = "macos";
 const WINDOWS: &str = "windows";

crypto/perlasm/arm-xlate.pl

@@ -30,7 +30,7 @@
     else			{ ""; }
 };
 my $hidden = sub {
-    if ($flavour =~ /ios/)	{ ".private_extern\t".join(',',@_); }
+    if ($flavour =~ /ios|visionos/)	{ ".private_extern\t".join(',',@_); }
     elsif ($flavour =~ /win64/) { ""; }
     else			{ ".hidden\t".join(',',@_); }
 };
@@ -58,7 +58,7 @@
     my $ret;
 
     SWITCH: for ($flavour) {
-	/ios/		&& do { $name = "_$name";
+	/ios|visionos/		&& do { $name = "_$name";
 				last;
 			      };
     }
@@ -109,7 +109,7 @@
     {	"";	}
 };
 my $section = sub {
-    if ($flavour =~ /ios/) {
+    if ($flavour =~ /ios|visionos/) {
         if ($_[0] eq ".rodata") {
             return ".section\t__TEXT,__const";
         }
@@ -163,7 +163,7 @@ sub expand_line {
     # Although the flavour is specified as "linux", it is really used by all
     # ELF platforms.
     $target_defines = "defined(__ELF__)";
-} elsif ($flavour =~ /ios/) {
+} elsif ($flavour =~ /ios|visionos/) {
     # Although the flavour is specified as "ios", it is really used by all Apple
     # platforms.
     $target_defines = "defined(__APPLE__)";
@@ -223,7 +223,7 @@ sub expand_line {
 	    $opcode = eval("\$$mnemonic");
 	}
 
-	if ($flavour =~ /ios/) {
+	if ($flavour =~ /ios|visionos/) {
 	    # Mach-O and ELF use different syntax for these relocations. Note
 	    # that we require :pg_hi21: to be explicitly listed. It is normally
 	    # optional with adrp instructions.

src/cpu/arm.rs

@@ -170,7 +170,12 @@ fn detect_features() -> u32 {
 
 #[cfg(all(
     target_arch = "aarch64",
-    any(target_os = "ios", target_os = "macos", target_os = "tvos")
+    any(
+        target_os = "ios",
+        target_os = "visionos",
+        target_os = "macos",
+        target_os = "tvos"
+    )
 ))]
 fn detect_features() -> u32 {
     // TODO(MSRV 1.64): Use `name: &core::ffi::CStr`.
@@ -225,7 +230,12 @@ fn detect_features() -> u32 {
         target_os = "fuchsia",
         all(target_os = "linux", not(target_env = "uclibc")),
         target_os = "windows",
-        any(target_os = "ios", target_os = "macos", target_os = "tvos"),
+        any(
+            target_os = "ios",
+            target_os = "visionos",
+            target_os = "macos",
+            target_os = "tvos"
+        ),
     ))
 ))]
 fn detect_features() -> u32 {

src/ec/curve25519/x25519.rs

@@ -63,7 +63,10 @@ fn x25519_public_from_private(
     let private_key: &[u8; SCALAR_LEN] = private_key.bytes_less_safe().try_into()?;
     let private_key = ops::MaskedScalar::from_bytes_masked(*private_key);
 
-    #[cfg(all(not(target_os = "ios"), target_arch = "arm"))]
+    #[cfg(all(
+        not(any(target_os = "ios", target_os = "visionos")),
+        target_arch = "arm"
+    ))]
     {
         if cpu::arm::NEON.available(cpu_features) {
             static MONTGOMERY_BASE_POINT: [u8; 32] = [
@@ -109,7 +112,10 @@ fn x25519_ecdh(
         point: &ops::EncodedPoint,
         #[allow(unused_variables)] cpu_features: cpu::Features,
     ) {
-        #[cfg(all(not(target_os = "ios"), target_arch = "arm"))]
+        #[cfg(all(
+            not(any(target_os = "ios", target_os = "visionos")),
+            target_arch = "arm"
+        ))]
         {
             if cpu::arm::NEON.available(cpu_features) {
                 return x25519_neon(out, scalar, point);
@@ -158,7 +164,10 @@ fn x25519_ecdh(
     Ok(())
 }
 
-#[cfg(all(not(target_os = "ios"), target_arch = "arm"))]
+#[cfg(all(
+    not(any(target_os = "ios", target_os = "visionos")),
+    target_arch = "arm"
+))]
 fn x25519_neon(out: &mut ops::EncodedPoint, scalar: &ops::MaskedScalar, point: &ops::EncodedPoint) {
     prefixed_extern! {
         fn x25519_NEON(

src/rand.rs

@@ -134,6 +134,7 @@ impl crate::sealed::Sealed for SystemRandom {}
     target_os = "hermit",
     target_os = "illumos",
     target_os = "ios",
+    target_os = "visionos",
     target_os = "linux",
     target_os = "macos",
     target_os = "netbsd",