Add mcontext_t and ucontext_t for ARM Linux

Author: Amanieu

src/unix/linux_like/linux/gnu/b32/arm/align.rs

@@ -4,4 +4,15 @@ s_no_extra_traits! {
     pub struct max_align_t {
         priv_: [i64; 2]
     }
+
+    #[allow(missing_debug_implementations)]
+    #[repr(align(8))]
+    pub struct ucontext_t {
+        pub uc_flags: ::c_ulong,
+        pub uc_link: *mut ucontext_t,
+        pub uc_stack: ::stack_t,
+        pub uc_mcontext: ::mcontext_t,
+        pub uc_sigmask: ::sigset_t,
+        pub uc_regspace: [::c_ulong; 128],
+    }
 }

src/unix/linux_like/linux/gnu/b32/arm/mod.rs

@@ -167,6 +167,30 @@ s! {
         pub seccomp_notif_resp: ::__u16,
         pub seccomp_data: ::__u16,
     }
+
+    pub struct mcontext_t {
+        pub trap_no: ::c_ulong,
+        pub error_code: ::c_ulong,
+        pub oldmask: ::c_ulong,
+        pub arm_r0: ::c_ulong,
+        pub arm_r1: ::c_ulong,
+        pub arm_r2: ::c_ulong,
+        pub arm_r3: ::c_ulong,
+        pub arm_r4: ::c_ulong,
+        pub arm_r5: ::c_ulong,
+        pub arm_r6: ::c_ulong,
+        pub arm_r7: ::c_ulong,
+        pub arm_r8: ::c_ulong,
+        pub arm_r9: ::c_ulong,
+        pub arm_r10: ::c_ulong,
+        pub arm_fp: ::c_ulong,
+        pub arm_ip: ::c_ulong,
+        pub arm_sp: ::c_ulong,
+        pub arm_lr: ::c_ulong,
+        pub arm_pc: ::c_ulong,
+        pub arm_cpsr: ::c_ulong,
+        pub fault_address: ::c_ulong,
+    }
 }
 
 pub const RLIM_INFINITY: ::rlim_t = !0;

src/unix/linux_like/linux/musl/b32/arm/mod.rs

@@ -150,6 +150,42 @@ s! {
         pub f_namemax: ::c_ulong,
         __f_spare: [::c_int; 6],
     }
+
+    pub struct mcontext_t {
+        pub trap_no: ::c_ulong,
+        pub error_code: ::c_ulong,
+        pub oldmask: ::c_ulong,
+        pub arm_r0: ::c_ulong,
+        pub arm_r1: ::c_ulong,
+        pub arm_r2: ::c_ulong,
+        pub arm_r3: ::c_ulong,
+        pub arm_r4: ::c_ulong,
+        pub arm_r5: ::c_ulong,
+        pub arm_r6: ::c_ulong,
+        pub arm_r7: ::c_ulong,
+        pub arm_r8: ::c_ulong,
+        pub arm_r9: ::c_ulong,
+        pub arm_r10: ::c_ulong,
+        pub arm_fp: ::c_ulong,
+        pub arm_ip: ::c_ulong,
+        pub arm_sp: ::c_ulong,
+        pub arm_lr: ::c_ulong,
+        pub arm_pc: ::c_ulong,
+        pub arm_cpsr: ::c_ulong,
+        pub fault_address: ::c_ulong,
+    }
+}
+
+s_no_extra_traits! {
+    #[allow(missing_debug_implementations)]
+    pub struct ucontext_t {
+        pub uc_flags: ::c_ulong,
+        pub uc_link: *mut ucontext_t,
+        pub uc_stack: ::stack_t,
+        pub uc_mcontext: mcontext_t,
+        pub uc_sigmask: ::sigset_t,
+        pub uc_regspace: [::c_ulonglong; 64],
+    }
 }
 
 pub const SIGSTKSZ: ::size_t = 8192;