apple: Port mcontext and ucontext to the new layout

Author: tgross35

src/new/apple/alibc/mod.rs

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+

src/new/apple/alibc/signal.rs

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+//! Header: `signal.h`
+//!
+//! https://github.com/apple-oss-distributions/Libc/blob/main/include/signal.h
+
+pub use crate::sys::signal::*;

src/new/apple/mod.rs

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+//! Entrypoint for Apple headers, usually found as part of the xcode SDK.
+
+pub(crate) mod xnu;
+pub(crate) use xnu::*;
+
+pub(crate) mod alibc {
+    pub(crate) mod signal;
+}
+
+pub(crate) use alibc::*;

src/new/apple/xnu/arm/_mcontext.rs

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+//! Header: `arm/_mcontext.h`
+//!
+//! https://github.com/apple-oss-distributions/xnu/blob/f6217f891ac0bb64f3d375211650a4c1ff8ca1ea/bsd/arm/_mcontext.h
+
+pub use crate::mach::machine::_structs::*;
+
+s! {
+    pub struct __darwin_mcontext64 {
+        pub __es: __darwin_arm_exception_state64,
+        pub __ss: __darwin_arm_thread_state64,
+        pub __ns: __darwin_arm_neon_state64,
+    }
+}
+
+pub type mcontext_t = *mut __darwin_mcontext64;

src/new/apple/xnu/i386/_mcontext.rs

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+pub use crate::mach::machine::_structs::*;
+
+s! {
+    pub struct __darwin_mcontext64 {
+        pub __es: __darwin_x86_exception_state64,
+        pub __ss: __darwin_x86_thread_state64,
+        pub __fs: __darwin_x86_float_state64,
+    }
+}
+
+pub type mcontext_t = *mut __darwin_mcontext64;

src/new/apple/xnu/mach/arm/_structs.rs

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+//! Header: `arm/_structs.h`
+//!
+//! https://github.com/apple-oss-distributions/xnu/blob/main/osfmk/mach/arm/_structs.h
+
+#[cfg(target_arch = "arm")]
+use crate::prelude::*;
+
+s! {
+    pub struct __darwin_arm_exception_state64 {
+        pub __far: u64,
+        pub __esr: u32,
+        pub __exception: u32,
+    }
+
+    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,
+    }
+
+    #[cfg(target_arch = "aarch64")]
+    pub struct __darwin_arm_neon_state64 {
+        pub __v: [crate::__uint128_t; 32],
+        pub __fpsr: u32,
+        pub __fpcr: u32,
+    }
+
+    #[cfg(target_arch = "arm")]
+    #[repr(align(16))]
+    pub struct __darwin_arm_neon_state64 {
+        opaque: [c_char; (32 * 16) + (2 * size_of::<u32>())]
+    }
+}

src/new/apple/xnu/mach/i386/_structs.rs

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+

src/new/apple/xnu/mach/machine/_structs.rs

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+//! Header: `mach/machine/_structs.h`
+
+cfg_if! {
+    if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] {
+        pub use crate::mach::i386::_structs::*;
+    } else if #[cfg(any(target_arch = "arm", target_arch = "aarch64"))] {
+        pub use crate::mach::arm::_structs::*;
+    } else {
+        // Unsupported arch
+    }
+}

src/new/apple/xnu/mach/mod.rs

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+pub(crate) mod arm {
+    pub(crate) mod _structs;
+}
+
+pub(crate) mod i386 {
+    pub(crate) mod _structs;
+}
+
+pub(crate) mod machine {
+    pub(crate) mod _structs;
+}

src/new/apple/xnu/machine/_mcontext.rs

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+//! Header: `machine/_mcontext.h`
+
+cfg_if! {
+    if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] {
+        pub use crate::i386::_mcontext::*;
+    } else if #[cfg(any(target_arch = "arm", target_arch = "aarch64"))] {
+        pub use crate::arm::_mcontext::*;
+    } else {
+        // Unsupported arch
+    }
+}