minix/sys/arch/i386/include/mcontext.h

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/* $NetBSD: mcontext.h,v 1.10 2011/02/25 14:07:13 joerg Exp $ */
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/*-
* Copyright (c) 1999 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.
*/
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#ifndef _I386_MCONTEXT_H_
#define _I386_MCONTEXT_H_
/*
* mcontext extensions to handle signal delivery.
*/
#define _UC_SETSTACK 0x00010000
#define _UC_CLRSTACK 0x00020000
#define _UC_VM 0x00040000
#define _UC_TLSBASE 0x00080000
/*
* Layout of mcontext_t according to the System V Application Binary Interface,
* Intel386(tm) Architecture Processor Supplement, Fourth Edition.
*/
/*
* General register state
*/
#define _NGREG 19
typedef int __greg_t;
typedef __greg_t __gregset_t[_NGREG];
#define _REG_GS 0
#define _REG_FS 1
#define _REG_ES 2
#define _REG_DS 3
#define _REG_EDI 4
#define _REG_ESI 5
#define _REG_EBP 6
#define _REG_ESP 7
#define _REG_EBX 8
#define _REG_EDX 9
#define _REG_ECX 10
#define _REG_EAX 11
#define _REG_TRAPNO 12
#define _REG_ERR 13
#define _REG_EIP 14
#define _REG_CS 15
#define _REG_EFL 16
#define _REG_UESP 17
#define _REG_SS 18
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/*
* Floating point register state
*/
typedef struct {
union {
struct {
int __fp_state[27]; /* Environment and registers */
int __fp_status; /* Software status word */
} __fpchip_state;
struct {
char __fp_emul[246];
char __fp_epad[2];
} __fp_emul_space;
struct {
char __fp_xmm[512];
} __fp_xmm_state;
int __fp_fpregs[128];
} __fp_reg_set;
long __fp_wregs[33]; /* Weitek? */
} __fpregset_t;
typedef struct {
__gregset_t __gregs;
__fpregset_t __fpregs;
__greg_t _mc_tlsbase;
#ifdef __minix
int mc_magic;
int mc_flags;
#endif
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} mcontext_t;
#ifdef __minix
#define _MC_FPU_SAVED 0x001
#endif
#define _UC_FXSAVE 0x20 /* FP state is in FXSAVE format in XMM space */
#define _UC_MACHINE_PAD 4 /* Padding appended to ucontext_t */
#define _UC_UCONTEXT_ALIGN (~0xf)
#ifdef _KERNEL_OPT
#include "opt_vm86.h"
#ifdef VM86
/*#include <machine/psl.h>*/
#define PSL_VM 0x00020000
#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP] + \
((uc)->uc_mcontext.__gregs[_REG_EFL] & PSL_VM ? \
((uc)->uc_mcontext.__gregs[_REG_SS] << 4) : 0))
#endif /* VM86 */
#endif /* _KERNEL_OPT */
#ifndef _UC_MACHINE_SP
#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP])
#endif
#define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_EIP])
#define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_EAX])
#define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
#ifdef __minix
#define _UC_MACHINE_STACK(uc) ((uc)->uc_mcontext.__gregs[_REG_ESP])
#define _UC_MACHINE_SET_STACK(uc, esp) _UC_MACHINE_STACK(uc) = (esp)
#define _UC_MACHINE_EBP(uc) ((uc)->uc_mcontext.__gregs[_REG_EBP])
#define _UC_MACHINE_SET_EBP(uc, ebp) _UC_MACHINE_EBP(uc) = (ebp)
#define _UC_MACHINE_ESI(uc) ((uc)->uc_mcontext.__gregs[_REG_ESI])
#define _UC_MACHINE_SET_ESI(uc, esi) _UC_MACHINE_ESI(uc) = (esi)
#endif
#define __UCONTEXT_SIZE 776
static __inline void *
__lwp_getprivate_fast(void)
{
void *__tmp;
__asm volatile("movl %%gs:0, %0" : "=r" (__tmp));
return __tmp;
}
#ifdef __minix
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int setmcontext(const mcontext_t *mcp);
int getmcontext(mcontext_t *mcp);
#define MCF_MAGIC 0xc0ffee
#endif
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#endif /* !_I386_MCONTEXT_H_ */