1 /* $NetBSD: mcontext.h,v 1.16 2024/11/30 01:04:14 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Klaus Klein. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _SH3_MCONTEXT_H_ 33 #define _SH3_MCONTEXT_H_ 34 35 /* 36 * Layout of mcontext_t for the sh3 architecture. 37 */ 38 39 #define _NGREG 22 40 typedef int __greg_t; 41 typedef __greg_t __gregset_t[_NGREG]; 42 43 #define _REG_GBR 0 44 #define _REG_PC 1 45 #define _REG_SR 2 46 #define _REG_MACL 3 47 #define _REG_MACH 4 48 #define _REG_PR 5 49 #define _REG_R14 6 50 #define _REG_R13 7 51 #define _REG_R12 8 52 #define _REG_R11 9 53 #define _REG_R10 10 54 #define _REG_R9 11 55 #define _REG_R8 12 56 #define _REG_R7 13 57 #define _REG_R6 14 58 #define _REG_R5 15 59 #define _REG_R4 16 60 #define _REG_R3 17 61 #define _REG_R2 18 62 #define _REG_R1 19 63 #define _REG_R0 20 64 #define _REG_R15 21 65 /* Convenience synonym */ 66 #define _REG_SP _REG_R15 67 68 /* 69 * FPU state description. 70 * XXX: kernel doesn't support FPU yet, so this is just a placeholder. 71 */ 72 typedef struct { 73 int __fpr_fpscr; 74 int __fpr_fpul; 75 /* XXX: redefine as a union when we do support FPU */ 76 int __fpr_regs[32]; /* SH3E has 16, SH4 has 32 */ 77 } __fpregset_t; 78 79 typedef struct { 80 __gregset_t __gregs; 81 __fpregset_t __fpregs; 82 } mcontext_t; 83 84 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_SP]) 85 #define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_R14]) 86 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC]) 87 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_R0]) 88 89 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 90 91 /* 92 * Machine dependent uc_flags 93 */ 94 #define _UC_SETSTACK _UC_MD_BIT16 95 #define _UC_CLRSTACK _UC_MD_BIT17 96 #define _UC_TLSBASE _UC_MD_BIT19 97 98 #endif /* !_SH3_MCONTEXT_H_ */ 99