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ucontext.h
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/* Copyright (C) 2001-2012 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 <http://www.gnu.org/licenses/>. */ #ifndef _SYS_UCONTEXT_H #define _SYS_UCONTEXT_H 1 #include <features.h> #include <signal.h> /* We need the signal context definitions even if they are not used included in <signal.h>. */ #include <bits/sigcontext.h> #ifdef __x86_64__ /* Type for general register. */ __extension__ typedef long long int greg_t; /* Number of general registers. */ #define NGREG 23 /* Container for all general registers. */ typedef greg_t gregset_t[NGREG]; #ifdef __USE_GNU /* Number of each register in the `gregset_t' array. */ enum { REG_R8 = 0, # define REG_R8 REG_R8 REG_R9, # define REG_R9 REG_R9 REG_R10, # define REG_R10 REG_R10 REG_R11, # define REG_R11 REG_R11 REG_R12, # define REG_R12 REG_R12 REG_R13, # define REG_R13 REG_R13 REG_R14, # define REG_R14 REG_R14 REG_R15, # define REG_R15 REG_R15 REG_RDI, # define REG_RDI REG_RDI REG_RSI, # define REG_RSI REG_RSI REG_RBP, # define REG_RBP REG_RBP REG_RBX, # define REG_RBX REG_RBX REG_RDX, # define REG_RDX REG_RDX REG_RAX, # define REG_RAX REG_RAX REG_RCX, # define REG_RCX REG_RCX REG_RSP, # define REG_RSP REG_RSP REG_RIP, # define REG_RIP REG_RIP REG_EFL, # define REG_EFL REG_EFL REG_CSGSFS, /* Actually short cs, gs, fs, __pad0. */ # define REG_CSGSFS REG_CSGSFS REG_ERR, # define REG_ERR REG_ERR REG_TRAPNO, # define REG_TRAPNO REG_TRAPNO REG_OLDMASK, # define REG_OLDMASK REG_OLDMASK REG_CR2 # define REG_CR2 REG_CR2 }; #endif struct _libc_fpxreg { unsigned short int significand[4]; unsigned short int exponent; unsigned short int padding[3]; }; struct _libc_xmmreg { __uint32_t element[4]; }; struct _libc_fpstate { /* 64-bit FXSAVE format. */ __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]; }; /* Structure to describe FPU registers. */ typedef struct _libc_fpstate *fpregset_t; /* Context to describe whole processor state. */ typedef struct { gregset_t gregs; /* Note that fpregs is a pointer. */ fpregset_t fpregs; __extension__ unsigned long long __reserved1 [8]; } mcontext_t; /* Userlevel context. */ typedef struct ucontext { unsigned long int 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; #else /* !__x86_64__ */ /* Type for general register. */ typedef int greg_t; /* Number of general registers. */ #define NGREG 19 /* Container for all general registers. */ typedef greg_t gregset_t[NGREG]; #ifdef __USE_GNU /* 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 /* Definitions taken from the kernel headers. */ struct _libc_fpreg { unsigned short int significand[4]; unsigned short int exponent; }; struct _libc_fpstate { unsigned long int cw; unsigned long int sw; unsigned long int tag; unsigned long int ipoff; unsigned long int cssel; unsigned long int dataoff; unsigned long int datasel; struct _libc_fpreg _st[8]; unsigned long int status; }; /* Structure to describe FPU registers. */ typedef struct _libc_fpstate *fpregset_t; /* Context to describe whole processor state. */ typedef struct { gregset_t gregs; /* Due to Linux's history we have to use a pointer here. The SysV/i386 ABI requires a struct with the values. */ fpregset_t fpregs; unsigned long int oldmask; unsigned long int cr2; } mcontext_t; /* Userlevel context. */ typedef struct ucontext { unsigned long int 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 /* !__x86_64__ */ #endif /* sys/ucontext.h */