1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef SANDBOX_LINUX_SERVICES_ANDROID_I386_UCONTEXT_H_ 6 #define SANDBOX_LINUX_SERVICES_ANDROID_I386_UCONTEXT_H_ 7 8 // We do something compatible with glibc. Hopefully, at some point Android will 9 // provide that for us, and __BIONIC_HAVE_UCONTEXT_T should be defined. 10 // This is mostly copied from breakpad (common/android/include/sys/ucontext.h), 11 // except we do use sigset_t for uc_sigmask instead of a custom type. 12 13 #if !defined(__BIONIC_HAVE_UCONTEXT_T) 14 #include <asm/sigcontext.h> 15 16 /* 80-bit floating-point register */ 17 struct _libc_fpreg { 18 unsigned short significand[4]; 19 unsigned short exponent; 20 }; 21 22 /* Simple floating-point state, see FNSTENV instruction */ 23 struct _libc_fpstate { 24 unsigned long cw; 25 unsigned long sw; 26 unsigned long tag; 27 unsigned long ipoff; 28 unsigned long cssel; 29 unsigned long dataoff; 30 unsigned long datasel; 31 struct _libc_fpreg _st[8]; 32 unsigned long status; 33 }; 34 35 typedef uint32_t greg_t; 36 37 typedef struct { 38 uint32_t gregs[19]; 39 struct _libc_fpstate* fpregs; 40 uint32_t oldmask; 41 uint32_t cr2; 42 } mcontext_t; 43 44 enum { 45 REG_GS = 0, 46 REG_FS, 47 REG_ES, 48 REG_DS, 49 REG_EDI, 50 REG_ESI, 51 REG_EBP, 52 REG_ESP, 53 REG_EBX, 54 REG_EDX, 55 REG_ECX, 56 REG_EAX, 57 REG_TRAPNO, 58 REG_ERR, 59 REG_EIP, 60 REG_CS, 61 REG_EFL, 62 REG_UESP, 63 REG_SS, 64 }; 65 66 typedef struct ucontext { 67 uint32_t uc_flags; 68 struct ucontext* uc_link; 69 stack_t uc_stack; 70 mcontext_t uc_mcontext; 71 sigset_t uc_sigmask; 72 struct _libc_fpstate __fpregs_mem; 73 } ucontext_t; 74 75 #else 76 #include <sys/ucontext.h> 77 #endif // __BIONIC_HAVE_UCONTEXT_T 78 79 #endif // SANDBOX_LINUX_SERVICES_ANDROID_I386_UCONTEXT_H_ 80
