Fix thread_state64 on aarch64-apple-darwin

Author: JohnTitor

src/unix/bsd/apple/b64/aarch64.rs

@@ -0,0 +1,17 @@
+s! {
+    pub struct __darwin_mcontext64 {
+        pub __es: ::__darwin_x86_exception_state64,
+        pub __ss: __darwin_arm_thread_state64,
+        pub __fs: ::__darwin_x86_float_state64,
+    }
+
+    pub struct __darwin_arm_thread_state64 {
+        pub __x: [u64; 29],
+        pub __fp: u64,
+        pub __lr: u64,
+        pub __sp: u64,
+        pub __pc: u64,
+        pub __cpsr: u32,
+        pub __pad: u32,
+    }
+}

src/unix/bsd/apple/b64/mod.rs

@@ -59,43 +59,13 @@ s! {
         pub uc_mcontext: mcontext_t,
     }
 
-    pub struct __darwin_mcontext64 {
-        pub __es: __darwin_x86_exception_state64,
-        pub __ss: __darwin_x86_thread_state64,
-        pub __fs: __darwin_x86_float_state64,
-    }
-
     pub struct __darwin_x86_exception_state64 {
         pub __trapno: u16,
         pub __cpu: u16,
         pub __err: u32,
         pub __faultvaddr: u64,
     }
 
-    pub struct __darwin_x86_thread_state64 {
-        pub __rax: u64,
-        pub __rbx: u64,
-        pub __rcx: u64,
-        pub __rdx: u64,
-        pub __rdi: u64,
-        pub __rsi: u64,
-        pub __rbp: u64,
-        pub __rsp: u64,
-        pub __r8: u64,
-        pub __r9: u64,
-        pub __r10: u64,
-        pub __r11: u64,
-        pub __r12: u64,
-        pub __r13: u64,
-        pub __r14: u64,
-        pub __r15: u64,
-        pub __rip: u64,
-        pub __rflags: u64,
-        pub __cs: u64,
-        pub __fs: u64,
-        pub __gs: u64,
-    }
-
     pub struct __darwin_x86_float_state64 {
         pub __fpu_reserved: [::c_int; 2],
         __fpu_fcw: ::c_short,
@@ -220,3 +190,15 @@ cfg_if! {
         pub use self::align::*;
     }
 }
+
+cfg_if! {
+    if #[cfg(target_arch = "x86_64")] {
+        mod x86_64;
+        pub use self::x86_64::*;
+    } else if #[cfg(target_arch = "aarch64")] {
+        mod aarch64;
+        pub use self::aarch64::*;
+    } else {
+        // Unknown target_arch
+    }
+}

src/unix/bsd/apple/b64/x86_64.rs

@@ -0,0 +1,31 @@
+s! {
+    pub struct __darwin_mcontext64 {
+        pub __es: ::__darwin_x86_exception_state64,
+        pub __ss: __darwin_x86_thread_state64,
+        pub __fs: ::__darwin_x86_float_state64,
+    }
+
+    pub struct __darwin_x86_thread_state64 {
+        pub __rax: u64,
+        pub __rbx: u64,
+        pub __rcx: u64,
+        pub __rdx: u64,
+        pub __rdi: u64,
+        pub __rsi: u64,
+        pub __rbp: u64,
+        pub __rsp: u64,
+        pub __r8: u64,
+        pub __r9: u64,
+        pub __r10: u64,
+        pub __r11: u64,
+        pub __r12: u64,
+        pub __r13: u64,
+        pub __r14: u64,
+        pub __r15: u64,
+        pub __rip: u64,
+        pub __rflags: u64,
+        pub __cs: u64,
+        pub __fs: u64,
+        pub __gs: u64,
+    }
+}