Add mcontext_t/ucontext_t for FreeBSD (amd64 and aarch64)

Author: valpackett

src/unix/bsd/freebsdlike/freebsd/aarch64.rs

@@ -3,6 +3,7 @@ pub type c_long = i64;
 pub type c_ulong = u64;
 pub type time_t = i64;
 pub type suseconds_t = i64;
+pub type register_t = i64;
 
 s! {
     pub struct stat {
@@ -30,6 +31,35 @@ s! {
     }
 }
 
+pub const _MC_FP_VALID: ::c_int = 0x1;
+
+s! {
+    pub struct gpregs {
+        pub gp_x: [register_t; 30],
+        pub gp_lr: register_t,
+        pub gp_sp: register_t,
+        pub gp_elr: register_t,
+        pub gp_spsr: u32,
+        pub gp_pad: ::c_int,
+    }
+
+    pub struct fpregs {
+        pub fp_q: [u128; 32],
+        pub fp_sr: u32,
+        pub fp_cr: u32,
+        pub fp_flags: ::c_int,
+        pub fp_pad: ::c_int,
+    }
+
+    pub struct mcontext_t {
+        pub mc_gpregs: gpregs,
+        pub mc_fpregs: fpregs,
+        pub mc_flags: ::c_int,
+        pub mc_pad: ::c_int,
+        pub mc_spare: [u64; 8],
+    }
+}
+
 // should be pub(crate), but that requires Rust 1.18.0
 cfg_if! {
     if #[cfg(libc_const_size_of)] {

src/unix/bsd/freebsdlike/freebsd/arm.rs

@@ -3,6 +3,7 @@ pub type c_long = i32;
 pub type c_ulong = u32;
 pub type time_t = i64;
 pub type suseconds_t = i32;
+pub type register_t = i32;
 
 s! {
     pub struct stat {

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -151,6 +151,17 @@ s_no_extra_traits! {
         __unused1: ::c_int,
         __unused2: [::c_long; 7]
     }
+
+    #[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))]
+    #[cfg_attr(feature = "extra_traits", derive(Debug))]
+    pub struct ucontext_t {
+        pub uc_sigmask: ::sigset_t,
+        pub uc_mcontext: ::mcontext_t,
+        pub uc_link: *mut ::ucontext_t,
+        pub uc_stack: ::stack_t,
+        pub uc_flags: ::c_int,
+        __spare__: [::c_int; 4],
+    }
 }
 
 cfg_if! {

src/unix/bsd/freebsdlike/freebsd/powerpc64.rs

@@ -3,6 +3,7 @@ pub type c_long = i64;
 pub type c_ulong = u64;
 pub type time_t = i64;
 pub type suseconds_t = i64;
+pub type register_t = i64;
 
 s! {
     pub struct stat {

src/unix/bsd/freebsdlike/freebsd/x86.rs

@@ -3,6 +3,7 @@ pub type c_long = i32;
 pub type c_ulong = u32;
 pub type time_t = i32;
 pub type suseconds_t = i32;
+pub type register_t = i32;
 
 s! {
     pub struct stat {

src/unix/bsd/freebsdlike/freebsd/x86_64/mod.rs

@@ -3,6 +3,7 @@ pub type c_long = i64;
 pub type c_ulong = u64;
 pub type time_t = i64;
 pub type suseconds_t = i64;
+pub type register_t = i64;
 
 // should be pub(crate), but that requires Rust 1.18.0
 cfg_if! {
@@ -22,3 +23,153 @@ cfg_if! {
         pub use self::align::*;
     }
 }
+
+pub const _MC_HASSEGS: u32 = 0x1;
+pub const _MC_HASBASES: u32 = 0x2;
+pub const _MC_HASFPXSTATE: u32 = 0x4;
+pub const _MC_FLAG_MASK: u32 = (_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE);
+
+s_no_extra_traits! {
+    #[repr(align(16))]
+    pub struct mcontext_t {
+        pub mc_onstack: register_t,
+        pub mc_rdi: register_t,
+        pub mc_rsi: register_t,
+        pub mc_rdx: register_t,
+        pub mc_rcx: register_t,
+        pub mc_r8: register_t,
+        pub mc_r9: register_t,
+        pub mc_rax: register_t,
+        pub mc_rbx: register_t,
+        pub mc_rbp: register_t,
+        pub mc_r10: register_t,
+        pub mc_r11: register_t,
+        pub mc_r12: register_t,
+        pub mc_r13: register_t,
+        pub mc_r14: register_t,
+        pub mc_r15: register_t,
+        pub mc_trapno: u32,
+        pub mc_fs: u16,
+        pub mc_gs: u16,
+        pub mc_addr: register_t,
+        pub mc_flags: u32,
+        pub mc_es: u16,
+        pub mc_ds: u16,
+        pub mc_err: register_t,
+        pub mc_rip: register_t,
+        pub mc_cs: register_t,
+        pub mc_rflags: register_t,
+        pub mc_rsp: register_t,
+        pub mc_ss: register_t,
+        pub mc_len: c_long,
+        pub mc_fpformat: c_long,
+        pub mc_ownedfp: c_long,
+        pub mc_fpstate: [c_long; 64],
+        pub mc_fsbase: register_t,
+        pub mc_gsbase: register_t,
+        pub mc_xfpustate: register_t,
+        pub mc_xfpustate_len: register_t,
+        pub mc_spare: [c_long; 4],
+    }
+}
+
+cfg_if! {
+    if #[cfg(feature = "extra_traits")] {
+        impl PartialEq for mcontext_t {
+            fn eq(&self, other: &mcontext_t) -> bool {
+                self.mc_onstack == other.mc_onstack &&
+                self.mc_rdi == other.mc_rdi &&
+                self.mc_rsi == other.mc_rsi &&
+                self.mc_rdx == other.mc_rdx &&
+                self.mc_rcx == other.mc_rcx &&
+                self.mc_r8 == other.mc_r8 &&
+                self.mc_r9 == other.mc_r9 &&
+                self.mc_rax == other.mc_rax &&
+                self.mc_rbx == other.mc_rbx &&
+                self.mc_rbp == other.mc_rbp &&
+                self.mc_r10 == other.mc_r10 &&
+                self.mc_r11 == other.mc_r11 &&
+                self.mc_r12 == other.mc_r12 &&
+                self.mc_r13 == other.mc_r13 &&
+                self.mc_r14 == other.mc_r14 &&
+                self.mc_r15 == other.mc_r15 &&
+                self.mc_trapno == other.mc_trapno &&
+                self.mc_fs == other.mc_fs &&
+                self.mc_gs == other.mc_gs &&
+                self.mc_addr == other.mc_addr &&
+                self.mc_flags == other.mc_flags &&
+                self.mc_es == other.mc_es &&
+                self.mc_ds == other.mc_ds &&
+                self.mc_err == other.mc_err &&
+                self.mc_rip == other.mc_rip &&
+                self.mc_cs == other.mc_cs &&
+                self.mc_rflags == other.mc_rflags &&
+                self.mc_rsp == other.mc_rsp &&
+                self.mc_ss == other.mc_ss &&
+                self.mc_len == other.mc_len &&
+                self.mc_fpformat == other.mc_fpformat &&
+                self.mc_ownedfp == other.mc_ownedfp &&
+                self.mc_fpstate.iter().zip(other.mc_fpstate.iter())
+                .all(|(a, b)| a == b) &&
+                self.mc_fsbase == other.mc_fsbase &&
+                self.mc_gsbase == other.mc_gsbase &&
+                self.mc_xfpustate == other.mc_xfpustate &&
+                self.mc_xfpustate_len == other.mc_xfpustate_len &&
+                self.mc_spare == other.mc_spare
+            }
+        }
+
+        impl Eq for mcontext_t {}
+
+        impl ::fmt::Debug for mcontext_t {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                f.debug_struct("mcontext_t")
+                    .field("mc_onstack", &self.mc_onstack)
+                    .field("mc_rdi", &self.mc_rdi)
+                    .field("mc_rsi", &self.mc_rsi)
+                    .field("mc_rdx", &self.mc_rdx)
+                    .field("mc_rcx", &self.mc_rcx)
+                    .field("mc_r8", &self.mc_r8)
+                    .field("mc_r9", &self.mc_r9)
+                    .field("mc_rax", &self.mc_rax)
+                    .field("mc_rbx", &self.mc_rbx)
+                    .field("mc_rbp", &self.mc_rbp)
+                    .field("mc_r10", &self.mc_r10)
+                    .field("mc_r11", &self.mc_r11)
+                    .field("mc_r12", &self.mc_r12)
+                    .field("mc_r13", &self.mc_r13)
+                    .field("mc_r14", &self.mc_r14)
+                    .field("mc_r15", &self.mc_r15)
+                    .field("mc_trapno", &self.mc_trapno)
+                    .field("mc_fs", &self.mc_fs)
+                    .field("mc_gs", &self.mc_gs)
+                    .field("mc_addr", &self.mc_addr)
+                    .field("mc_flags", &self.mc_flags)
+                    .field("mc_es", &self.mc_es)
+                    .field("mc_ds", &self.mc_ds)
+                    .field("mc_err", &self.mc_err)
+                    .field("mc_rip", &self.mc_rip)
+                    .field("mc_cs", &self.mc_cs)
+                    .field("mc_rflags", &self.mc_rflags)
+                    .field("mc_rsp", &self.mc_rsp)
+                    .field("mc_ss", &self.mc_ss)
+                    .field("mc_len", &self.mc_len)
+                    .field("mc_fpformat", &self.mc_fpformat)
+                    .field("mc_ownedfp", &self.mc_ownedfp)
+                    // FIXME: .field("mc_fpstate", &self.mc_fpstate)
+                    .field("mc_fsbase", &self.mc_fsbase)
+                    .field("mc_gsbase", &self.mc_gsbase)
+                    .field("mc_xfpustate", &self.mc_xfpustate)
+                    .field("mc_xfpustate_len", &self.mc_xfpustate_len)
+                    .field("mc_spare", &self.mc_spare)
+                    .finish()
+            }
+        }
+    }
+}
+
+pub const _MC_FPFMT_NODEV: c_long = 0x10000;
+pub const _MC_FPFMT_XMM: c_long = 0x10002;
+pub const _MC_FPOWNED_NONE: c_long = 0x20000;
+pub const _MC_FPOWNED_FPU: c_long = 0x20001;
+pub const _MC_FPOWNED_PCB: c_long = 0x20002;