| /* Copyright (C) 1997-2018 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/>. */ |
| |
| /* System V/i386 ABI compliant context switching support. */ |
| |
| #ifndef _SYS_UCONTEXT_H |
| #define _SYS_UCONTEXT_H 1 |
| |
| #include <features.h> |
| |
| #include <bits/types/sigset_t.h> |
| #include <bits/types/stack_t.h> |
| |
| |
| /* Type for general register. */ |
| typedef int greg_t; |
| |
| /* Number of general registers. */ |
| #define __NGREG 19 |
| #ifdef __USE_MISC |
| # define NGREG __NGREG |
| #endif |
| |
| /* Container for all general registers. */ |
| typedef greg_t gregset_t[__NGREG]; |
| |
| #ifdef __USE_MISC |
| /* 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 |
| |
| #ifdef __USE_MISC |
| # define __ctx(fld) fld |
| # define __ctxt(tag) tag |
| #else |
| # define __ctx(fld) __ ## fld |
| # define __ctxt(tag) /* Empty. */ |
| #endif |
| |
| /* Structure to describe FPU registers. */ |
| typedef struct fpregset |
| { |
| union |
| { |
| struct __ctxt(fpchip_state) |
| { |
| int __ctx(state)[27]; |
| int __ctx(status); |
| } __ctx(fpchip_state); |
| |
| struct __ctxt(fp_emul_space) |
| { |
| char __ctx(fp_emul)[246]; |
| char __ctx(fp_epad)[2]; |
| } __ctx(fp_emul_space); |
| |
| int __ctx(f_fpregs)[62]; |
| } __ctx(fp_reg_set); |
| |
| long int __ctx(f_wregs)[33]; |
| } fpregset_t; |
| |
| /* Context to describe whole processor state. */ |
| typedef struct |
| { |
| gregset_t __ctx(gregs); |
| fpregset_t __ctx(fpregs); |
| } mcontext_t; |
| |
| /* Userlevel context. */ |
| typedef struct ucontext_t |
| { |
| unsigned long int __ctx(uc_flags); |
| struct ucontext_t *uc_link; |
| sigset_t uc_sigmask; |
| stack_t uc_stack; |
| mcontext_t uc_mcontext; |
| long int __glibc_reserved1[5]; |
| } ucontext_t; |
| |
| #undef __ctx |
| #undef __ctxt |
| |
| #endif /* sys/ucontext.h */ |
