| /* Copyright (C) 1998-2018 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/ARM 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> |
| |
| |
| #ifdef __USE_MISC |
| # define __ctx(fld) fld |
| #else |
| # define __ctx(fld) __ ## fld |
| #endif |
| |
| #ifdef __USE_MISC |
| typedef int greg_t; |
| |
| /* Number of general registers. */ |
| # define NGREG 18 |
| |
| /* Container for all general registers. */ |
| typedef greg_t gregset_t[NGREG]; |
| |
| /* Number of each register is the `gregset_t' array. */ |
| enum |
| { |
| REG_R0 = 0, |
| # define REG_R0 REG_R0 |
| REG_R1 = 1, |
| # define REG_R1 REG_R1 |
| REG_R2 = 2, |
| # define REG_R2 REG_R2 |
| REG_R3 = 3, |
| # define REG_R3 REG_R3 |
| REG_R4 = 4, |
| # define REG_R4 REG_R4 |
| REG_R5 = 5, |
| # define REG_R5 REG_R5 |
| REG_R6 = 6, |
| # define REG_R6 REG_R6 |
| REG_R7 = 7, |
| # define REG_R7 REG_R7 |
| REG_R8 = 8, |
| # define REG_R8 REG_R8 |
| REG_R9 = 9, |
| # define REG_R9 REG_R9 |
| REG_R10 = 10, |
| # define REG_R10 REG_R10 |
| REG_R11 = 11, |
| # define REG_R11 REG_R11 |
| REG_R12 = 12, |
| # define REG_R12 REG_R12 |
| REG_R13 = 13, |
| # define REG_R13 REG_R13 |
| REG_R14 = 14, |
| # define REG_R14 REG_R14 |
| REG_R15 = 15 |
| # define REG_R15 REG_R15 |
| }; |
| |
| struct _libc_fpstate |
| { |
| struct |
| { |
| unsigned int sign1:1; |
| unsigned int unused:15; |
| unsigned int sign2:1; |
| unsigned int exponent:14; |
| unsigned int j:1; |
| unsigned int mantissa1:31; |
| unsigned int mantissa0:32; |
| } fpregs[8]; |
| unsigned int fpsr:32; |
| unsigned int fpcr:32; |
| unsigned char ftype[8]; |
| unsigned int init_flag; |
| }; |
| /* Structure to describe FPU registers. */ |
| typedef struct _libc_fpstate fpregset_t; |
| #endif |
| |
| /* Context to describe whole processor state. This only describes |
| the core registers; coprocessor registers get saved elsewhere |
| (e.g. in uc_regspace, or somewhere unspecified on the stack |
| during non-RT signal handlers). */ |
| typedef struct |
| { |
| unsigned long int __ctx(trap_no); |
| unsigned long int __ctx(error_code); |
| unsigned long int __ctx(oldmask); |
| unsigned long int __ctx(arm_r0); |
| unsigned long int __ctx(arm_r1); |
| unsigned long int __ctx(arm_r2); |
| unsigned long int __ctx(arm_r3); |
| unsigned long int __ctx(arm_r4); |
| unsigned long int __ctx(arm_r5); |
| unsigned long int __ctx(arm_r6); |
| unsigned long int __ctx(arm_r7); |
| unsigned long int __ctx(arm_r8); |
| unsigned long int __ctx(arm_r9); |
| unsigned long int __ctx(arm_r10); |
| unsigned long int __ctx(arm_fp); |
| unsigned long int __ctx(arm_ip); |
| unsigned long int __ctx(arm_sp); |
| unsigned long int __ctx(arm_lr); |
| unsigned long int __ctx(arm_pc); |
| unsigned long int __ctx(arm_cpsr); |
| unsigned long int __ctx(fault_address); |
| } mcontext_t; |
| |
| /* Userlevel context. */ |
| typedef struct ucontext_t |
| { |
| unsigned long __ctx(uc_flags); |
| struct ucontext_t *uc_link; |
| stack_t uc_stack; |
| mcontext_t uc_mcontext; |
| sigset_t uc_sigmask; |
| unsigned long __ctx(uc_regspace)[128] __attribute__((__aligned__(8))); |
| } ucontext_t; |
| |
| #undef __ctx |
| |
| #endif /* sys/ucontext.h */ |
