--- /dev/null
+/* Copyright (C) 2001-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H 1
+
+#include <features.h>
+
+#include <bits/types.h>
+#include <bits/types/sigset_t.h>
+#include <bits/types/stack_t.h>
+
+
+#ifdef __USE_MISC
+# define __ctx(fld) fld
+#else
+# define __ctx(fld) __ ## fld
+#endif
+
+#ifdef __x86_64__
+
+/* Type for general register. */
+__extension__ typedef long long int greg_t;
+
+/* Number of general registers. */
+#define __NGREG 23
+#ifdef __USE_MISC
+# define NGREG __NGREG
+#endif
+
+/* Container for all general registers. */
+typedef greg_t gregset_t[__NGREG];
+
+#ifdef __USE_GNU
+/* Number of each register in the `gregset_t' array. */
+enum
+{
+ REG_R8 = 0,
+# define REG_R8 REG_R8
+ REG_R9,
+# define REG_R9 REG_R9
+ REG_R10,
+# define REG_R10 REG_R10
+ REG_R11,
+# define REG_R11 REG_R11
+ REG_R12,
+# define REG_R12 REG_R12
+ REG_R13,
+# define REG_R13 REG_R13
+ REG_R14,
+# define REG_R14 REG_R14
+ REG_R15,
+# define REG_R15 REG_R15
+ REG_RDI,
+# define REG_RDI REG_RDI
+ REG_RSI,
+# define REG_RSI REG_RSI
+ REG_RBP,
+# define REG_RBP REG_RBP
+ REG_RBX,
+# define REG_RBX REG_RBX
+ REG_RDX,
+# define REG_RDX REG_RDX
+ REG_RAX,
+# define REG_RAX REG_RAX
+ REG_RCX,
+# define REG_RCX REG_RCX
+ REG_RSP,
+# define REG_RSP REG_RSP
+ REG_RIP,
+# define REG_RIP REG_RIP
+ REG_EFL,
+# define REG_EFL REG_EFL
+ REG_CSGSFS, /* Actually short cs, gs, fs, __pad0. */
+# define REG_CSGSFS REG_CSGSFS
+ REG_ERR,
+# define REG_ERR REG_ERR
+ REG_TRAPNO,
+# define REG_TRAPNO REG_TRAPNO
+ REG_OLDMASK,
+# define REG_OLDMASK REG_OLDMASK
+ REG_CR2
+# define REG_CR2 REG_CR2
+};
+#endif
+
+struct _libc_fpxreg
+{
+ unsigned short int __ctx(significand)[4];
+ unsigned short int __ctx(exponent);
+ unsigned short int __glibc_reserved1[3];
+};
+
+struct _libc_xmmreg
+{
+ __uint32_t __ctx(element)[4];
+};
+
+struct _libc_fpstate
+{
+ /* 64-bit FXSAVE format. */
+ __uint16_t __ctx(cwd);
+ __uint16_t __ctx(swd);
+ __uint16_t __ctx(ftw);
+ __uint16_t __ctx(fop);
+ __uint64_t __ctx(rip);
+ __uint64_t __ctx(rdp);
+ __uint32_t __ctx(mxcsr);
+ __uint32_t __ctx(mxcr_mask);
+ struct _libc_fpxreg _st[8];
+ struct _libc_xmmreg _xmm[16];
+ __uint32_t __glibc_reserved1[24];
+};
+
+/* Structure to describe FPU registers. */
+typedef struct _libc_fpstate *fpregset_t;
+
+/* Context to describe whole processor state. */
+typedef struct
+ {
+ gregset_t __ctx(gregs);
+ /* Note that fpregs is a pointer. */
+ fpregset_t __ctx(fpregs);
+ __extension__ unsigned long long __reserved1 [8];
+} mcontext_t;
+
+/* Userlevel context. */
+typedef struct ucontext_t
+ {
+ unsigned long int __ctx(uc_flags);
+ struct ucontext_t *uc_link;
+ stack_t uc_stack;
+ mcontext_t uc_mcontext;
+ sigset_t uc_sigmask;
+ struct _libc_fpstate __fpregs_mem;
+ __extension__ unsigned long long int __ssp[4];
+ } ucontext_t;
+
+#else /* !__x86_64__ */
+
+/* Type for general register. */
+typedef int greg_t;
+
+/* Number of general registers. */
+#define __NGREG 19
+#ifdef __USE_MISC
+# define NGREG __NGREG
+#endif
+
+/* Container for all general registers. */
+typedef greg_t gregset_t[__NGREG];
+
+#ifdef __USE_GNU
+/* Number of each register is the `gregset_t' array. */
+enum
+{
+ REG_GS = 0,
+# define REG_GS REG_GS
+ REG_FS,
+# define REG_FS REG_FS
+ REG_ES,
+# define REG_ES REG_ES
+ REG_DS,
+# define REG_DS REG_DS
+ REG_EDI,
+# define REG_EDI REG_EDI
+ REG_ESI,
+# define REG_ESI REG_ESI
+ REG_EBP,
+# define REG_EBP REG_EBP
+ REG_ESP,
+# define REG_ESP REG_ESP
+ REG_EBX,
+# define REG_EBX REG_EBX
+ REG_EDX,
+# define REG_EDX REG_EDX
+ REG_ECX,
+# define REG_ECX REG_ECX
+ REG_EAX,
+# define REG_EAX REG_EAX
+ REG_TRAPNO,
+# define REG_TRAPNO REG_TRAPNO
+ REG_ERR,
+# define REG_ERR REG_ERR
+ REG_EIP,
+# define REG_EIP REG_EIP
+ REG_CS,
+# define REG_CS REG_CS
+ REG_EFL,
+# define REG_EFL REG_EFL
+ REG_UESP,
+# define REG_UESP REG_UESP
+ REG_SS
+# define REG_SS REG_SS
+};
+#endif
+
+/* Definitions taken from the kernel headers. */
+struct _libc_fpreg
+{
+ unsigned short int __ctx(significand)[4];
+ unsigned short int __ctx(exponent);
+};
+
+struct _libc_fpstate
+{
+ unsigned long int __ctx(cw);
+ unsigned long int __ctx(sw);
+ unsigned long int __ctx(tag);
+ unsigned long int __ctx(ipoff);
+ unsigned long int __ctx(cssel);
+ unsigned long int __ctx(dataoff);
+ unsigned long int __ctx(datasel);
+ struct _libc_fpreg _st[8];
+ unsigned long int __ctx(status);
+};
+
+/* Structure to describe FPU registers. */
+typedef struct _libc_fpstate *fpregset_t;
+
+/* Context to describe whole processor state. */
+typedef struct
+ {
+ gregset_t __ctx(gregs);
+ /* Due to Linux's history we have to use a pointer here. The SysV/i386
+ ABI requires a struct with the values. */
+ fpregset_t __ctx(fpregs);
+ unsigned long int __ctx(oldmask);
+ unsigned long int __ctx(cr2);
+ } mcontext_t;
+
+/* Userlevel context. */
+typedef struct ucontext_t
+ {
+ unsigned long int __ctx(uc_flags);
+ struct ucontext_t *uc_link;
+ stack_t uc_stack;
+ mcontext_t uc_mcontext;
+ sigset_t uc_sigmask;
+ struct _libc_fpstate __fpregs_mem;
+ unsigned long int __ssp[4];
+ } ucontext_t;
+
+#endif /* !__x86_64__ */
+
+#undef __ctx
+
+#endif /* sys/ucontext.h */
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