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pthread_md.h revision 1.2 
      1 /*	$NetBSD: pthread_md.h,v 1.2 2003/01/18 10:34:20 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nathan J. Williams.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _LIB_PTHREAD_MIPS_MD_H
     40 #define _LIB_PTHREAD_MIPS_MD_H
     41 
     42 static __inline long
     43 pthread__sp(void)
     44 {
     45 	long ret;
     46 
     47 	__asm("move %0, $sp" : "=r" (ret));
     48 
     49 	return ret;
     50 }
     51 
     52 #define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_SP])
     53 #define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_EPC])
     54 
     55 /*
     56  * Usable stack space below the ucontext_t.
     57  *    For a good time, see comments in pthread_switch.S and
     58  *    ../i386/pthread_switch.S about STACK_SWITCH.
     59  */
     60 #define STACKSPACE	16		/* 4 integer valuses */
     61 
     62 /*
     63  * Conversions between struct reg and struct mcontext. Used by
     64  * libpthread_dbg.  Note that in the "reg" structure, the indices
     65  * are the same as are used in the "frame" structure in the kernel.
     66  * These do NOT, in all cases, match the indices used in the
     67  * "mcontext" structure.
     68  */
     69 #include <mips/regnum.h>
     70 
     71 #define PTHREAD_UCONTEXT_TO_REG(reg, uc)				\
     72 do {									\
     73 	memcpy(&(reg)->r_regs[AST], &(uc)->uc_mcontext.__gregs[_REG_AT],\
     74 	    sizeof(__greg_t) * 31);					\
     75 	(reg)->r_regs[MULLO] = (uc)->uc_mcontext.__gregs[_REG_MDLO];	\
     76 	(reg)->r_regs[MULHI] = (uc)->uc_mcontext.__gregs[_REG_MDHI];	\
     77 	(reg)->r_regs[CAUSE] = (uc)->uc_mcontext.__gregs[_REG_CAUSE];	\
     78 	(reg)->r_regs[PC] = (uc)->uc_mcontext.__gregs[_REG_EPC];	\
     79 	(reg)->r_regs[SR] = (uc)->uc_mcontext.__gregs[_REG_SR];		\
     80 } while (/*CONSTCOND*/0)
     81 
     82 #define PTHREAD_REG_TO_UCONTEXT(uc, reg)				\
     83 do {									\
     84 	memcpy(&(uc)->uc_mcontext.__gregs[_REG_AT], &(reg)->r_regs[AST],\
     85 	    sizeof(__greg_t) * 31);					\
     86 	(uc)->uc_mcontext.__gregs[_REG_MDLO] = (reg)->r_regs[MULLO];	\
     87 	(uc)->uc_mcontext.__gregs[_REG_MDHI] = (reg)->r_regs[MULHI];	\
     88 	(uc)->uc_mcontext.__gregs[_REG_CAUSE] = (reg)->r_regs[CAUSE];	\
     89 	(uc)->uc_mcontext.__gregs[_REG_EPC] = (reg)->r_regs[PC];	\
     90 	(uc)->uc_mcontext.__gregs[_REG_SR] = (reg)->r_regs[SR];		\
     91 									\
     92 	(uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER;       	\
     93 } while (/*CONSTCOND*/0)
     94 
     95 #define PTHREAD_UCONTEXT_TO_FPREG(freg, uc)       			\
     96 do {									\
     97 	memcpy((freg), &(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32,	\
     98 	    sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32));	\
     99 	(freg)->r_regs[FSR - FPBASE] =					\
    100 	    (uc)->uc_mcontext.__fpregs.__fp_csr;			\
    101 } while (/*CONSTCOND*/0)
    102 
    103 #define PTHREAD_FPREG_TO_UCONTEXT(uc, freg)				\
    104 do {						       	       		\
    105 	memcpy(&(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32, (freg),	\
    106 	    sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32));	\
    107 	(uc)->uc_mcontext.__fpregs.__fp_csr =				\
    108 	    (freg)->r_regs[FSR - FPBASE];				\
    109 									\
    110 	(uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER;       	\
    111 } while (/*CONSTCOND*/0)
    112 
    113 #endif /* !_LIB_PTHREAD_MIPS_MD_H */
    114