michael@0: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: /* This file has been imported from
michael@0:  * http://git.chromium.org/gitweb/?p=chromium.git;a=blob;f=sandbox/linux/services/android_i386_ucontext.h;hb=99b3e83972e478a42fa72da1ffefee58413e87d4
michael@0:  */
michael@0: 
michael@0: #ifndef SANDBOX_LINUX_SERVICES_ANDROID_I386_UCONTEXT_H_
michael@0: #define SANDBOX_LINUX_SERVICES_ANDROID_I386_UCONTEXT_H_
michael@0: 
michael@0: // We do something compatible with glibc. Hopefully, at some point Android will
michael@0: // provide that for us, and __BIONIC_HAVE_UCONTEXT_T should be defined.
michael@0: // This is mostly copied from breakpad (common/android/include/sys/ucontext.h),
michael@0: // except we do use sigset_t for uc_sigmask instead of a custom type.
michael@0: 
michael@0: #if !defined(__BIONIC_HAVE_UCONTEXT_T)
michael@0: #include <asm/sigcontext.h>
michael@0: 
michael@0: /* 80-bit floating-point register */
michael@0: struct _libc_fpreg {
michael@0:   unsigned short significand[4];
michael@0:   unsigned short exponent;
michael@0: };
michael@0: 
michael@0: /* Simple floating-point state, see FNSTENV instruction */
michael@0: struct _libc_fpstate {
michael@0:   unsigned long cw;
michael@0:   unsigned long sw;
michael@0:   unsigned long tag;
michael@0:   unsigned long ipoff;
michael@0:   unsigned long cssel;
michael@0:   unsigned long dataoff;
michael@0:   unsigned long datasel;
michael@0:   struct _libc_fpreg _st[8];
michael@0:   unsigned long status;
michael@0: };
michael@0: 
michael@0: typedef uint32_t greg_t;
michael@0: 
michael@0: typedef struct {
michael@0:   uint32_t gregs[19];
michael@0:   struct _libc_fpstate* fpregs;
michael@0:   uint32_t oldmask;
michael@0:   uint32_t cr2;
michael@0: } mcontext_t;
michael@0: 
michael@0: enum {
michael@0:   REG_GS = 0,
michael@0:   REG_FS,
michael@0:   REG_ES,
michael@0:   REG_DS,
michael@0:   REG_EDI,
michael@0:   REG_ESI,
michael@0:   REG_EBP,
michael@0:   REG_ESP,
michael@0:   REG_EBX,
michael@0:   REG_EDX,
michael@0:   REG_ECX,
michael@0:   REG_EAX,
michael@0:   REG_TRAPNO,
michael@0:   REG_ERR,
michael@0:   REG_EIP,
michael@0:   REG_CS,
michael@0:   REG_EFL,
michael@0:   REG_UESP,
michael@0:   REG_SS,
michael@0: };
michael@0: 
michael@0: typedef struct ucontext {
michael@0:   uint32_t uc_flags;
michael@0:   struct ucontext* uc_link;
michael@0:   stack_t uc_stack;
michael@0:   mcontext_t uc_mcontext;
michael@0:   sigset_t uc_sigmask;
michael@0:   struct _libc_fpstate __fpregs_mem;
michael@0: } ucontext_t;
michael@0: 
michael@0: #else
michael@0: #include <sys/ucontext.h>
michael@0: #endif  // __BIONIC_HAVE_UCONTEXT_T
michael@0: 
michael@0: #endif  // SANDBOX_LINUX_SERVICES_ANDROID_I386_UCONTEXT_H_