#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+struct __fpstate {
+ unsigned long __x[4];
+ unsigned char __y[384];
+ unsigned long __z[12];
+};
+
+typedef struct {
+ unsigned long __gregs[23];
+ void *__fpregs;
+ unsigned long __reserved1[8];
+} mcontext_t;
+
+typedef struct __ucontext {
+ unsigned long uc_flags;
+ struct __ucontext *uc_link;
+ stack_t uc_stack;
+ mcontext_t uc_mcontext;
+ sigset_t uc_sigmask;
+ struct __fpstate __fpregs_mem;
+} ucontext_t;
+
+#ifdef _GNU_SOURCE
+struct sigcontext {
+ unsigned long r8, r9, r10, r11, r12, r13, r14, r15;
+ unsigned long rdi, rsi, rbp, rbx, rdx, rax, rcx, rsp, rip, eflags;
+ unsigned short cs, gs, fs, __pad0;
+ unsigned long err, trapno, oldmask, cr2;
+ struct __fpstate *fpstate;
+ unsigned long __reserved1[8];
+};
+#endif
+
struct __siginfo
{
int si_signo;