107 lines
3.9 KiB
C
107 lines
3.9 KiB
C
/* $NetBSD: pthread_md.h,v 1.2 2003/04/17 10:13:51 fvdl 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 Nathan J. Williams.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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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* Adapted for x86_64 by fvdl@netbsd.org
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*/
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#ifndef _LIB_PTHREAD_X86_64_MD_H
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#define _LIB_PTHREAD_X86_64_MD_H
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#include <sys/ucontext.h>
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static __inline long
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pthread__sp(void)
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{
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long ret;
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__asm("movq %%rsp, %0" : "=g" (ret));
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return ret;
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}
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#define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_URSP])
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#define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_RIP])
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/*
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* Set initial, sane values for registers whose values aren't just
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* "don't care".
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* 0x23 is GSEL(GUDATA_SEL, SEL_UPL), and
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* 0x1b is GSEL(GUCODE_SEL, SEL_UPL).
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* 0x202 is PSL_USERSET.
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*/
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#define _INITCONTEXT_U_MD(ucp) \
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(ucp)->uc_mcontext.__gregs[_REG_GS] = 0x23, \
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(ucp)->uc_mcontext.__gregs[_REG_FS] = 0x23, \
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(ucp)->uc_mcontext.__gregs[_REG_ES] = 0x23, \
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(ucp)->uc_mcontext.__gregs[_REG_DS] = 0x23, \
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(ucp)->uc_mcontext.__gregs[_REG_CS] = 0x1b, \
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(ucp)->uc_mcontext.__gregs[_REG_SS] = 0x23, \
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(ucp)->uc_mcontext.__gregs[_REG_RFL] = 0x202;
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/*
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* Usable stack space below the ucontext_t.
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* See comment in pthread_switch.S about STACK_SWITCH.
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*/
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#define STACKSPACE 64 /* room for 8 long values */
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/*
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* Conversions between struct reg and struct mcontext. Used by
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* libpthread_dbg.
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*/
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#define PTHREAD_UCONTEXT_TO_REG(reg, uc) \
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memcpy(reg, (uc)->uc_mcontext.__gregs, _NGREG * sizeof (long));
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#define PTHREAD_REG_TO_UCONTEXT(uc, reg) do { \
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memcpy((uc)->uc_mcontext.__gregs, reg, _NGREG * sizeof (long)); \
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(uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER; \
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} while (/*CONSTCOND*/0)
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#define PTHREAD_UCONTEXT_TO_FPREG(freg, uc) \
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(void)memcpy(&(freg)->fxstate, \
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(uc)->uc_mcontext.__fpregs, sizeof(struct fpreg))
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#define PTHREAD_FPREG_TO_UCONTEXT(uc, freg) do { \
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(void)memcpy( \
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(uc)->uc_mcontext.__fpregs, \
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&(freg)->fxstate, sizeof(struct fpreg)); \
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/*LINTED precision loss */ \
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(uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER; \
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} while (/*CONSTCOND*/0)
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#endif /* _LIB_PTHREAD_X86_64_MD_H */
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