145 lines
4.1 KiB
C
145 lines
4.1 KiB
C
/* $NetBSD: mcontext.h,v 1.13 2024/05/18 00:37:41 thorpej Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Klaus Klein.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _M68K_MCONTEXT_H_
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#define _M68K_MCONTEXT_H_
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#ifdef _KERNEL
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#include <m68k/cpuframe.h>
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#endif
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/*
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* mcontext extensions to handle signal delivery.
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*/
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#define _UC_SETSTACK _UC_MD_BIT16
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#define _UC_CLRSTACK _UC_MD_BIT17
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/*
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* General register state
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*/
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#define _NGREG 18
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typedef int __greg_t;
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typedef __greg_t __gregset_t[_NGREG];
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#define _REG_D0 0
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#define _REG_D1 1
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#define _REG_D2 2
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#define _REG_D3 3
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#define _REG_D4 4
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#define _REG_D5 5
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#define _REG_D6 6
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#define _REG_D7 7
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#define _REG_A0 8
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#define _REG_A1 9
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#define _REG_A2 10
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#define _REG_A3 11
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#define _REG_A4 12
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#define _REG_A5 13
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#define _REG_A6 14
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#define _REG_A7 15
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#define _REG_PC 16
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#define _REG_PS 17
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typedef struct {
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int __fp_pcr;
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int __fp_psr;
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int __fp_piaddr;
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int __fp_fpregs[8*3];
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} __fpregset_t;
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typedef struct {
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__gregset_t __gregs; /* General Register set */
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__fpregset_t __fpregs; /* Floating Point Register set */
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union {
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long __mc_state[201]; /* Only need 308 bytes... */
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#if defined(_KERNEL) || defined(__M68K_MCONTEXT_PRIVATE)
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struct {
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/* Rest of the frame. */
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unsigned int __mcf_format;
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unsigned int __mcf_vector;
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union F_u __mcf_exframe;
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/* Rest of the FPU frame. */
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union FPF_u1 __mcf_fpf_u1;
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union FPF_u2 __mcf_fpf_u2;
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} __mc_frame;
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#endif /* _KERNEL || __M68K_MCONTEXT_PRIVATE */
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} __mc_pad;
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__greg_t _mc_tlsbase;
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} mcontext_t;
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/* Note: no additional padding is to be performed in ucontext_t. */
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/* Machine-specific uc_flags value */
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#define _UC_M68K_UC_USER _UC_MD_BIT30
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#define _UC_TLSBASE _UC_MD_BIT19
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#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_A7])
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#define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_A6])
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#define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC])
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#define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_D0])
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#define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
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#define __UCONTEXT_SIZE 1024
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#if defined(_LIBC_SOURCE) || defined(_RTLD_SOURCE) || defined(__LIBPTHREAD_SOURCE__)
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#define TLS_TP_OFFSET 0x7000
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#define TLS_DTV_OFFSET 0x8000
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#include <sys/tls.h>
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__CTASSERT(TLS_TP_OFFSET + sizeof(struct tls_tcb) < 0x8000);
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__CTASSERT(TLS_TP_OFFSET % sizeof(struct tls_tcb) == 0);
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__BEGIN_DECLS
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void *_lwp_getprivate(void);
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void _lwp_setprivate(void *);
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static __inline struct tls_tcb *
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__lwp_gettcb_fast(void)
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{
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unsigned int __tcb = (unsigned int)_lwp_getprivate();
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return (struct tls_tcb *)(uintptr_t)
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(__tcb - TLS_TP_OFFSET - sizeof(struct tls_tcb));
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}
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static inline void
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__lwp_settcb(struct tls_tcb *__tcb)
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{
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__tcb += TLS_TP_OFFSET / sizeof(*__tcb) + 1;
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_lwp_setprivate(__tcb);
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}
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__END_DECLS
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#endif
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#endif /* !_M68K_MCONTEXT_H_ */
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