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/* $NetBSD: mcontext.h,v 1.5 2003/10/29 23:40:42 christos Exp $ */
/*-
* Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein, and by Jason R. Thorpe of Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MIPS_MCONTEXT_H_
#define _MIPS_MCONTEXT_H_
/*
* General register state
*/
#define _NGREG 37 /* R0-R31, MDLO, MDHI, CAUSE, PC, SR */
#define _REG_R0 0
#define _REG_AT 1
#define _REG_V0 2
#define _REG_V1 3
#define _REG_A0 4
#define _REG_A1 5
#define _REG_A2 6
#define _REG_A3 7
#define _REG_T0 8
#define _REG_T1 9
#define _REG_T2 10
#define _REG_T3 11
#define _REG_T4 12
#define _REG_T5 13
#define _REG_T6 14
#define _REG_T7 15
#define _REG_S0 16
#define _REG_S1 17
#define _REG_S2 18
#define _REG_S3 19
#define _REG_S4 20
#define _REG_S5 21
#define _REG_S6 22
#define _REG_S7 23
#define _REG_T8 24
#define _REG_T9 25
#define _REG_K0 26
#define _REG_K1 27
#define _REG_GP 28
#define _REG_SP 29
#define _REG_S8 30
#define _REG_RA 31
/* XXX: The following conflict with <mips/regnum.h> */
#define _REG_MDLO 32
#define _REG_MDHI 33
#define _REG_CAUSE 34
#define _REG_EPC 35
#define _REG_SR 36
#ifndef __ASSEMBLER__
/* Make sure this is signed; we need pointers to be sign-extended. */
#if defined(__mips_n32)
typedef long long __greg_t;
#else
typedef long __greg_t;
#endif /* __mips_n32 */
typedef __greg_t __gregset_t[_NGREG];
/*
* Floating point register state
*/
typedef struct {
union {
/*
* For the o32 ABI, there are 16 doubles, one at each
* even FP reg number. For 64-bit ABIs, each FP register
* is a 64-bit double.
*
* The FR bit in the SR indicates which FP mode is
* in use.
*/
union {
double __fp32_dregs[16];
float __fp32_fregs[32];
unsigned int __fp32_regs[32];
} __fp_regs32;
union {
double __fp64_dregs[32];
/* LONGLONG */
unsigned long long __fp64_regs[32];
} __fp_regs64;
} __fp_r;
unsigned int __fp_csr;
unsigned int __fp_pad;
} __fpregset_t;
typedef struct {
__gregset_t __gregs;
__fpregset_t __fpregs;
} mcontext_t;
#endif /* !__ASSEMBLER__ */
#define _UC_MACHINE_PAD 16 /* Padding appended to ucontext_t */
/*
* Offsets relative to ucontext_t; intended to be used by assembly stubs.
*/
#if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32
#define _OFFSETOF_UC_GREGS 40
#else
#define _OFFSETOF_UC_GREGS 56
#endif
#define _UC_SETSTACK 0x00010000
#define _UC_CLRSTACK 0x00020000
#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_SP])
#define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_EPC])
#define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_V0])
#define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
#endif /* _MIPS_MCONTEXT_H_ */
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