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/* $NetBSD: mcontext.h,v 1.15 2019/12/27 00:32:17 kamil Exp $ */
/*-
* 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.
*/
#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
/*
* Floating point register state
*/
typedef struct {
union {
struct {
int __fp_state[27]; /* Environment and registers */
} __fpchip_state; /* x87 regs in fsave format */
struct {
char __fp_xmm[512];
} __fp_xmm_state; /* x87 and xmm regs in fxsave format */
int __fp_fpregs[128];
} __fp_reg_set;
int __fp_pad[33]; /* Historic padding */
} __fpregset_t;
__CTASSERT(sizeof (__fpregset_t) == 512 + 33 * 4);
typedef struct {
__gregset_t __gregs;
__fpregset_t __fpregs;
__greg_t _mc_tlsbase;
} mcontext_t;
#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)
#ifndef _UC_MACHINE_SP
#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP])
#endif
#define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_EBP])
#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)
#define __UCONTEXT_SIZE 776
#if defined(_RTLD_SOURCE) || defined(_LIBC_SOURCE) || \
defined(__LIBPTHREAD_SOURCE__)
#include <sys/tls.h>
__BEGIN_DECLS
static __inline void *
__lwp_getprivate_fast(void)
{
void *__tmp;
__asm volatile("movl %%gs:0, %0" : "=r" (__tmp));
return __tmp;
}
__END_DECLS
#endif
#endif /* !_I386_MCONTEXT_H_ */
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