1 files changed, 138 insertions, 0 deletions
diff --git a/sysdeps/i386/bits/ucontext.h b/sysdeps/i386/bits/ucontext.h
new file mode 100644
index 0000000000..721878134c
--- /dev/null
+++ b/sysdeps/i386/bits/ucontext.h
@@ -0,0 +1,138 @@
+/* Copyright (C) 1997-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+/* System V/i386 ABI compliant context switching support.  */
+
+#ifndef _BITS_UCONTEXT_H
+#define _BITS_UCONTEXT_H	1
+
+#include <features.h>
+
+#include <bits/types/sigset_t.h>
+#include <bits/types/stack_t.h>
+
+
+/* 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_MISC
+/* 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
+
+#ifdef __USE_MISC
+# define __ctx(fld) fld
+# define __ctxt(tag) tag
+#else
+# define __ctx(fld) __ ## fld
+# define __ctxt(tag) /* Empty.  */
+#endif
+
+/* Structure to describe FPU registers.  */
+typedef struct
+  {
+    union
+      {
+	struct __ctxt(fpchip_state)
+	  {
+	    int __ctx(state)[27];
+	    int __ctx(status);
+	  } __ctx(fpchip_state);
+
+	struct __ctxt(fp_emul_space)
+	  {
+	    char __ctx(fp_emul)[246];
+	    char __ctx(fp_epad)[2];
+	  } __ctx(fp_emul_space);
+
+	int __ctx(f_fpregs)[62];
+      } __ctx(fp_reg_set);
+
+    long int __ctx(f_wregs)[33];
+  } fpregset_t;
+
+/* Context to describe whole processor state.  */
+typedef struct
+  {
+    gregset_t __ctx(gregs);
+    fpregset_t __ctx(fpregs);
+  } mcontext_t;
+
+/* Userlevel context.  */
+typedef struct ucontext_t
+  {
+    unsigned long int __ctx(uc_flags);
+    struct ucontext_t *uc_link;
+    sigset_t uc_sigmask;
+    stack_t uc_stack;
+    mcontext_t uc_mcontext;
+    long int __glibc_reserved1[5];
+  } ucontext_t;
+
+#undef __ctx
+#undef __ctxt
+
+#endif /* bits/ucontext.h */