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/* $NetBSD: mcontext.h,v 1.12 2020/10/04 10:34:18 rin Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* 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.
*
* 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 _M68K_MCONTEXT_H_
#define _M68K_MCONTEXT_H_
#ifdef _KERNEL
#include <m68k/cpuframe.h>
#endif
/*
* mcontext extensions to handle signal delivery.
*/
#define _UC_SETSTACK 0x00010000
#define _UC_CLRSTACK 0x00020000
/*
* General register state
*/
#define _NGREG 18
typedef int __greg_t;
typedef __greg_t __gregset_t[_NGREG];
#define _REG_D0 0
#define _REG_D1 1
#define _REG_D2 2
#define _REG_D3 3
#define _REG_D4 4
#define _REG_D5 5
#define _REG_D6 6
#define _REG_D7 7
#define _REG_A0 8
#define _REG_A1 9
#define _REG_A2 10
#define _REG_A3 11
#define _REG_A4 12
#define _REG_A5 13
#define _REG_A6 14
#define _REG_A7 15
#define _REG_PC 16
#define _REG_PS 17
typedef struct {
int __fp_pcr;
int __fp_psr;
int __fp_piaddr;
int __fp_fpregs[8*3];
} __fpregset_t;
typedef struct {
__gregset_t __gregs; /* General Register set */
__fpregset_t __fpregs; /* Floating Point Register set */
union {
long __mc_state[201]; /* Only need 308 bytes... */
#if defined(_KERNEL) || defined(__M68K_MCONTEXT_PRIVATE)
struct {
/* Rest of the frame. */
unsigned int __mcf_format;
unsigned int __mcf_vector;
union F_u __mcf_exframe;
/* Rest of the FPU frame. */
union FPF_u1 __mcf_fpf_u1;
union FPF_u2 __mcf_fpf_u2;
} __mc_frame;
#endif /* _KERNEL || __M68K_MCONTEXT_PRIVATE */
} __mc_pad;
__greg_t _mc_tlsbase;
} mcontext_t;
/* Note: no additional padding is to be performed in ucontext_t. */
/* Machine-specific uc_flags value */
#define _UC_M68K_UC_USER 0x40000000
#define _UC_TLSBASE 0x00080000
#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_A7])
#define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_A6])
#define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC])
#define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_D0])
#define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
#define __UCONTEXT_SIZE 1024
#if defined(_LIBC_SOURCE) || defined(_RTLD_SOURCE) || defined(__LIBPTHREAD_SOURCE__)
#define TLS_TP_OFFSET 0x7000
#define TLS_DTV_OFFSET 0x8000
#include <sys/tls.h>
__CTASSERT(TLS_TP_OFFSET + sizeof(struct tls_tcb) < 0x8000);
__CTASSERT(TLS_TP_OFFSET % sizeof(struct tls_tcb) == 0);
__BEGIN_DECLS
void *_lwp_getprivate(void);
void _lwp_setprivate(void *);
static __inline struct tls_tcb *
__lwp_gettcb_fast(void)
{
unsigned int __tcb = (unsigned int)_lwp_getprivate();
return (struct tls_tcb *)(uintptr_t)
(__tcb - TLS_TP_OFFSET - sizeof(struct tls_tcb));
}
static inline void
__lwp_settcb(struct tls_tcb *__tcb)
{
__tcb += TLS_TP_OFFSET / sizeof(*__tcb) + 1;
_lwp_setprivate(__tcb);
}
__END_DECLS
#endif
#endif /* !_M68K_MCONTEXT_H_ */
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