1 // Copyright 2014 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_SYSTEM_HEADERS_X86_64_LINUX_UCONTEXT_H_ 6 #define SANDBOX_LINUX_SYSTEM_HEADERS_X86_64_LINUX_UCONTEXT_H_ 7 8 #include <stdint.h> 9 10 // We do something compatible with glibc. Hopefully, at some point Android will 11 // provide that for us, and __BIONIC_HAVE_UCONTEXT_T should be defined. 12 // Spec: 13 // http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-AMD64/LSB-Core-AMD64/libc-ddefs.html#AEN5668 14 15 #if !defined(__BIONIC_HAVE_UCONTEXT_T) 16 #include <asm/sigcontext.h> 17 18 struct _libc_fpxreg { 19 unsigned short significand[4]; 20 unsigned short exponent; 21 unsigned short padding[3]; 22 }; 23 24 struct _libc_xmmreg { 25 uint32_t element[4]; 26 }; 27 28 struct _libc_fpstate { 29 uint16_t cwd; 30 uint16_t swd; 31 uint16_t twd; 32 uint16_t fop; 33 uint64_t rip; 34 uint64_t rdp; 35 uint32_t mxcsr; 36 uint32_t mxcsr_mask; 37 struct _libc_fpxreg _st[8]; 38 struct _libc_xmmreg _xmm[16]; 39 uint32_t padding[24]; 40 }; 41 42 typedef uint64_t greg_t; 43 44 typedef struct { 45 greg_t gregs[23]; 46 struct _libc_fpstate* fpregs; 47 unsigned long __reserved1[8]; 48 } mcontext_t; 49 50 enum { 51 REG_R8 = 0, 52 REG_R9, 53 REG_R10, 54 REG_R11, 55 REG_R12, 56 REG_R13, 57 REG_R14, 58 REG_R15, 59 REG_RDI, 60 REG_RSI, 61 REG_RBP, 62 REG_RBX, 63 REG_RDX, 64 REG_RAX, 65 REG_RCX, 66 REG_RSP, 67 REG_RIP, 68 REG_EFL, 69 REG_CSGSFS, 70 REG_ERR, 71 REG_TRAPNO, 72 REG_OLDMASK, 73 REG_CR2, 74 NGREG, 75 }; 76 77 typedef struct ucontext { 78 unsigned long uc_flags; 79 struct ucontext* uc_link; 80 stack_t uc_stack; 81 mcontext_t uc_mcontext; 82 sigset_t uc_sigmask; 83 struct _libc_fpstate __fpregs_mem; 84 } ucontext_t; 85 86 #else 87 #include <sys/ucontext.h> 88 #endif // __BIONIC_HAVE_UCONTEXT_T 89 90 #endif // SANDBOX_LINUX_SYSTEM_HEADERS_X86_64_LINUX_UCONTEXT_H_ 91