Merge "Added sys/ucontext.h and sys/user.h to all API levels."

ndk/platforms/android-3/arch-arm/include/asm/user.h

@@ -9,64 +9,5 @@
  ***
  ****************************************************************************
  ****************************************************************************/
-#ifndef _ARM_USER_H
-#define _ARM_USER_H
 
-#include <asm/page.h>
-#include <asm/ptrace.h>
-
-struct user_fp {
- struct fp_reg {
- unsigned int sign1:1;
- unsigned int unused:15;
- unsigned int sign2:1;
- unsigned int exponent:14;
- unsigned int j:1;
- unsigned int mantissa1:31;
- unsigned int mantissa0:32;
- } fpregs[8];
- unsigned int fpsr:32;
- unsigned int fpcr:32;
- unsigned char ftype[8];
- unsigned int init_flag;
-};
-
-struct user{
-
- struct pt_regs regs;
-
- int u_fpvalid;
-
- unsigned long int u_tsize;
- unsigned long int u_dsize;
- unsigned long int u_ssize;
- unsigned long start_code;
- unsigned long start_stack;
- long int signal;
- int reserved;
- struct pt_regs * u_ar0;
-
- unsigned long magic;
- char u_comm[32];
- int u_debugreg[8];
- struct user_fp u_fp;
- struct user_fp_struct * u_fp0;
-
-};
-#define NBPG PAGE_SIZE
-#define UPAGES 1
-#define HOST_TEXT_START_ADDR (u.start_code)
-#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
-
-struct user_vfp {
- unsigned long long fpregs[32];
- unsigned long fpscr;
-};
-
-struct user_vfp_exc {
- unsigned long fpexc;
- unsigned long fpinst;
- unsigned long fpinst2;
-};
-
-#endif
+#include <sys/user.h>

ndk/platforms/android-3/include/elf.h

@@ -28,6 +28,7 @@
 #ifndef _ELF_H
 #define _ELF_H
 
+#if !defined(AT_NULL)
 /* these definitions are missing from the BSD sources */
 enum {
     AT_NULL = 0,
@@ -51,6 +52,7 @@ enum {
 
     AT_SECURE = 23
 };
+#endif
 
 #include <stdint.h>
 #include <sys/exec_elf.h>

ndk/platforms/android-3/include/signal.h

@@ -38,6 +38,9 @@
 #include <asm/siginfo.h>
 #undef __ARCH_SI_UID_T
 
+#include <sys/ucontext.h>
+#define __BIONIC_HAVE_UCONTEXT_T
+
 __BEGIN_DECLS
 
 typedef int sig_atomic_t;

ndk/platforms/android-3/include/sys/ucontext.h

@@ -0,0 +1,289 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _SYS_UCONTEXT_H_
+#define _SYS_UCONTEXT_H_
+
+#include <signal.h>
+#include <sys/user.h>
+
+__BEGIN_DECLS
+
+#if defined(__arm__)
+
+enum {
+  REG_R0 = 0,
+  REG_R1,
+  REG_R2,
+  REG_R3,
+  REG_R4,
+  REG_R5,
+  REG_R6,
+  REG_R7,
+  REG_R8,
+  REG_R9,
+  REG_R10,
+  REG_R11,
+  REG_R12,
+  REG_R13,
+  REG_R14,
+  REG_R15,
+};
+
+#define NGREG 18 /* Like glibc. */
+
+typedef int greg_t;
+typedef greg_t gregset_t[NGREG];
+
+#include <asm/sigcontext.h>
+typedef struct sigcontext 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;
+  // Android has a wrong (smaller) sigset_t on ARM.
+  uint32_t __padding_rt_sigset;
+  // The kernel adds extra padding after uc_sigmask to match glibc sigset_t on ARM.
+  char __padding[120];
+  unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
+} ucontext_t;
+
+#elif defined(__aarch64__)
+
+#include <asm/sigcontext.h>
+typedef struct sigcontext mcontext_t;
+
+typedef struct ucontext {
+  unsigned long uc_flags;
+  struct ucontext *uc_link;
+  stack_t uc_stack;
+  sigset_t uc_sigmask;
+  // The kernel adds extra padding after uc_sigmask to match glibc sigset_t on ARM64.
+  char __padding[128 - sizeof(sigset_t)];
+  mcontext_t uc_mcontext;
+} ucontext_t;
+
+#elif defined(__i386__)
+
+enum {
+  REG_GS = 0,
+  REG_FS,
+  REG_ES,
+  REG_DS,
+  REG_EDI,
+  REG_ESI,
+  REG_EBP,
+  REG_ESP,
+  REG_EBX,
+  REG_EDX,
+  REG_ECX,
+  REG_EAX,
+  REG_TRAPNO,
+  REG_ERR,
+  REG_EIP,
+  REG_CS,
+  REG_EFL,
+  REG_UESP,
+  REG_SS,
+  NGREG
+};
+
+typedef int greg_t;
+typedef greg_t gregset_t[NGREG];
+
+struct _libc_fpreg {
+  unsigned short significand[4];
+  unsigned short exponent;
+};
+
+struct _libc_fpstate {
+  unsigned long cw;
+  unsigned long sw;
+  unsigned long tag;
+  unsigned long ipoff;
+  unsigned long cssel;
+  unsigned long dataoff;
+  unsigned long datasel;
+  struct _libc_fpreg _st[8];
+  unsigned long status;
+};
+
+typedef struct _libc_fpstate* fpregset_t;
+
+typedef struct {
+  gregset_t gregs;
+  fpregset_t fpregs;
+  unsigned long oldmask;
+  unsigned long cr2;
+} 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;
+  // Android has a wrong (smaller) sigset_t on x86.
+  uint32_t __padding_rt_sigset;
+  struct _libc_fpstate __fpregs_mem;
+} ucontext_t;
+
+#elif defined(__mips__)
+
+/* glibc doesn't have names for MIPS registers. */
+
+#define NGREG 32
+#define NFPREG 32
+
+typedef unsigned long long greg_t;
+typedef greg_t gregset_t[NGREG];
+
+typedef struct fpregset {
+  union {
+    double fp_dregs[NFPREG];
+    struct {
+      float _fp_fregs;
+      unsigned _fp_pad;
+    } fp_fregs[NFPREG];
+  } fp_r;
+} fpregset_t;
+
+typedef struct {
+  unsigned regmask;
+  unsigned status;
+  greg_t pc;
+  gregset_t gregs;
+  fpregset_t fpregs;
+  unsigned fp_owned;
+  unsigned fpc_csr;
+  unsigned fpc_eir;
+  unsigned used_math;
+  unsigned dsp;
+  greg_t mdhi;
+  greg_t mdlo;
+  unsigned long hi1;
+  unsigned long lo1;
+  unsigned long hi2;
+  unsigned long lo2;
+  unsigned long hi3;
+  unsigned long lo3;
+} 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;
+} ucontext_t;
+
+#elif defined(__mips64__)
+
+#error TODO
+
+#elif defined(__x86_64__)
+
+enum {
+  REG_R8 = 0,
+  REG_R9,
+  REG_R10,
+  REG_R11,
+  REG_R12,
+  REG_R13,
+  REG_R14,
+  REG_R15,
+  REG_RDI,
+  REG_RSI,
+  REG_RBP,
+  REG_RBX,
+  REG_RDX,
+  REG_RAX,
+  REG_RCX,
+  REG_RSP,
+  REG_RIP,
+  REG_EFL,
+  REG_CSGSFS,
+  REG_ERR,
+  REG_TRAPNO,
+  REG_OLDMASK,
+  REG_CR2,
+  NGREG
+};
+
+typedef long greg_t;
+typedef greg_t gregset_t[NGREG];
+
+struct _libc_fpxreg {
+  unsigned short significand[4];
+  unsigned short exponent;
+  unsigned short padding[3];
+};
+
+struct _libc_xmmreg {
+  uint32_t element[4];
+};
+
+struct _libc_fpstate {
+  uint16_t cwd;
+  uint16_t swd;
+  uint16_t ftw;
+  uint16_t fop;
+  uint64_t rip;
+  uint64_t rdp;
+  uint32_t mxcsr;
+  uint32_t mxcr_mask;
+  struct _libc_fpxreg _st[8];
+  struct _libc_xmmreg _xmm[16];
+  uint32_t padding[24];
+};
+
+typedef struct _libc_fpstate* fpregset_t;
+
+typedef struct {
+  gregset_t gregs;
+  fpregset_t 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 _libc_fpstate __fpregs_mem;
+} ucontext_t;
+
+#endif
+
+__END_DECLS
+
+#endif /* _SYS_UCONTEXT_H_ */

ndk/platforms/android-3/include/sys/user.h

@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _SYS_USER_H_
+#define _SYS_USER_H_
+
+#include <sys/cdefs.h>
+#include <limits.h> /* For PAGE_SIZE. */
+
+__BEGIN_DECLS
+
+#if __i386__
+
+struct user_fpregs_struct {
+  long cwd;
+  long swd;
+  long twd;
+  long fip;
+  long fcs;
+  long foo;
+  long fos;
+  long st_space[20];
+};
+struct user_fxsr_struct {
+  unsigned short cwd;
+  unsigned short swd;
+  unsigned short twd;
+  unsigned short fop;
+  long fip;
+  long fcs;
+  long foo;
+  long fos;
+  long mxcsr;
+  long reserved;
+  long st_space[32];
+  long xmm_space[32];
+  long padding[56];
+};
+struct user_regs_struct {
+  long ebx;
+  long ecx;
+  long edx;
+  long esi;
+  long edi;
+  long ebp;
+  long eax;
+  long xds;
+  long xes;
+  long xfs;
+  long xgs;
+  long orig_eax;
+  long eip;
+  long xcs;
+  long eflags;
+  long esp;
+  long xss;
+};
+struct user {
+  struct user_regs_struct regs;
+  int u_fpvalid;
+  struct user_fpregs_struct i387;
+  unsigned long int u_tsize;
+  unsigned long int u_dsize;
+  unsigned long int u_ssize;
+  unsigned long start_code;
+  unsigned long start_stack;
+  long int signal;
+  int reserved;
+  unsigned long u_ar0;
+  struct user_fpregs_struct* u_fpstate;
+  unsigned long magic;
+  char u_comm[32];
+  int u_debugreg[8];
+};
+
+#elif defined(__x86_64__)
+
+struct user_fpregs_struct {
+  unsigned short cwd;
+  unsigned short swd;
+  unsigned short ftw;
+  unsigned short fop;
+  __u64 rip;
+  __u64 rdp;
+  __u32 mxcsr;
+  __u32 mxcsr_mask;
+  __u32 st_space[32];
+  __u32 xmm_space[64];
+  __u32 padding[24];
+};
+struct user_regs_struct {
+  unsigned long r15;
+  unsigned long r14;
+  unsigned long r13;
+  unsigned long r12;
+  unsigned long rbp;
+  unsigned long rbx;
+  unsigned long r11;
+  unsigned long r10;
+  unsigned long r9;
+  unsigned long r8;
+  unsigned long rax;
+  unsigned long rcx;
+  unsigned long rdx;
+  unsigned long rsi;
+  unsigned long rdi;
+  unsigned long orig_rax;
+  unsigned long rip;
+  unsigned long cs;
+  unsigned long eflags;
+  unsigned long rsp;
+  unsigned long ss;
+  unsigned long fs_base;
+  unsigned long gs_base;
+  unsigned long ds;
+  unsigned long es;
+  unsigned long fs;
+  unsigned long gs;
+};
+struct user {
+  struct user_regs_struct regs;
+  int u_fpvalid;
+  int pad0;
+  struct user_fpregs_struct i387;
+  unsigned long int u_tsize;
+  unsigned long int u_dsize;
+  unsigned long int u_ssize;
+  unsigned long start_code;
+  unsigned long start_stack;
+  long int signal;
+  int reserved;
+  int pad1;
+  unsigned long u_ar0;
+  struct user_fpregs_struct* u_fpstate;
+  unsigned long magic;
+  char u_comm[32];
+  unsigned long u_debugreg[8];
+  unsigned long error_code;
+  unsigned long fault_address;
+};
+
+#elif defined(__mips__)
+
+struct user {
+  unsigned long regs[180 / sizeof(unsigned long) + 64];
+  size_t u_tsize;
+  size_t u_dsize;
+  size_t u_ssize;
+  unsigned long start_code;
+  unsigned long start_data;
+  unsigned long start_stack;
+  long int signal;
+  unsigned long u_ar0;
+  unsigned long magic;
+  char u_comm[32];
+};
+
+#elif defined(__arm__)
+
+struct user_fpregs {
+  struct fp_reg {
+    unsigned int sign1:1;
+    unsigned int unused:15;
+    unsigned int sign2:1;
+    unsigned int exponent:14;
+    unsigned int j:1;
+    unsigned int mantissa1:31;
+    unsigned int mantissa0:32;
+  } fpregs[8];
+  unsigned int fpsr:32;
+  unsigned int fpcr:32;
+  unsigned char ftype[8];
+  unsigned int init_flag;
+};
+struct user_regs {
+  unsigned long uregs[18];
+};
+struct user_vfp {
+  unsigned long long fpregs[32];
+  unsigned long fpscr;
+};
+struct user_vfp_exc {
+  unsigned long fpexc;
+  unsigned long fpinst;
+  unsigned long fpinst2;
+};
+struct user {
+  struct user_regs regs;
+  int u_fpvalid;
+  unsigned long int u_tsize;
+  unsigned long int u_dsize;
+  unsigned long int u_ssize;
+  unsigned long start_code;
+  unsigned long start_stack;
+  long int signal;
+  int reserved;
+  struct user_regs* u_ar0;
+  unsigned long magic;
+  char u_comm[32];
+  int u_debugreg[8];
+  struct user_fpregs u_fp;
+  struct user_fpregs* u_fp0;
+};
+
+#elif defined(__aarch64__)
+
+// There are no user structures for 64 bit arm.
+
+#else
+
+#error "Unsupported architecture."
+
+#endif
+
+__END_DECLS
+
+#endif  /* _SYS_USER_H_ */

ndk/platforms/android-3/include/ucontext.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _UCONTEXT_H_
+#define _UCONTEXT_H_
+
+#include <sys/ucontext.h>
+
+#endif /* _UCONTEXT_H_ */

ndk/platforms/android-8/include/signal.h

@@ -39,6 +39,9 @@
 #include <asm/siginfo.h>
 #undef __ARCH_SI_UID_T
 
+#include <sys/ucontext.h>
+#define __BIONIC_HAVE_UCONTEXT_T
+
 __BEGIN_DECLS
 
 typedef int sig_atomic_t;

ndk/platforms/android-9/arch-mips/include/asm/user.h

@@ -16,34 +16,5 @@
  ***
  ****************************************************************************
  ****************************************************************************/
-#ifndef _ASM_USER_H
-#define _ASM_USER_H
-#include <asm/page.h>
-#include <asm/reg.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define EF_SIZE 180
-struct user {
- unsigned long regs[EF_SIZE /
- sizeof(unsigned long) + 64];
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- size_t u_tsize;
- size_t u_dsize;
- size_t u_ssize;
- unsigned long start_code;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned long start_data;
- unsigned long start_stack;
- long int signal;
- unsigned long u_ar0;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned long magic;
- char u_comm[32];
-};
-#define NBPG PAGE_SIZE
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define UPAGES 1
-#define HOST_TEXT_START_ADDR (u.start_code)
-#define HOST_DATA_START_ADDR (u.start_data)
-#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#endif
+
+#include <sys/user.h>

ndk/platforms/android-9/arch-x86/include/asm/elf.h

@@ -26,7 +26,7 @@ typedef unsigned long elf_greg_t;
 #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-typedef struct user_i387_struct elf_fpregset_t;
+typedef struct user_fpregs_struct elf_fpregset_t;
 typedef struct user_fxsr_struct elf_fpxregset_t;
 #define R_386_NONE 0
 #define R_386_32 1

ndk/platforms/android-9/arch-x86/include/asm/user.h

@@ -16,4 +16,5 @@
  ***
  ****************************************************************************
  ****************************************************************************/
-#include "user_32.h"
+
+#include <sys/user.h>

ndk/platforms/android-L/include/signal.h

@@ -48,6 +48,9 @@
 #  include <linux/signal.h>
 #endif
 
+#include <sys/ucontext.h>
+#define __BIONIC_HAVE_UCONTEXT_T
+
 __BEGIN_DECLS
 
 typedef int sig_atomic_t;

ndk/platforms/android-L/include/sys/ucontext.h

@@ -68,11 +68,9 @@ typedef struct ucontext {
   struct ucontext* uc_link;
   stack_t uc_stack;
   mcontext_t uc_mcontext;
+  sigset_t uc_sigmask;
   // Android has a wrong (smaller) sigset_t on ARM.
-  union {
-    sigset_t bionic;
-    uint32_t kernel[2];
-  } uc_sigmask;
+  uint32_t __padding_rt_sigset;
   // The kernel adds extra padding after uc_sigmask to match glibc sigset_t on ARM.
   char __padding[120];
   unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
@@ -152,11 +150,9 @@ typedef struct ucontext {
   struct ucontext* uc_link;
   stack_t uc_stack;
   mcontext_t uc_mcontext;
+  sigset_t uc_sigmask;
   // Android has a wrong (smaller) sigset_t on x86.
-  union {
-    sigset_t bionic;
-    uint32_t kernel[2];
-  } uc_sigmask;
+  uint32_t __padding_rt_sigset;
   struct _libc_fpstate __fpregs_mem;
 } ucontext_t;