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pthread_md.h revision 1.6.22.1 
      1 /*	$NetBSD: pthread_md.h,v 1.6.22.1 2008/05/18 12:30:42 yamt 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LIB_PTHREAD_MIPS_MD_H
     33 #define _LIB_PTHREAD_MIPS_MD_H
     34 
     35 static inline long
     36 pthread__sp(void)
     37 {
     38 	long ret;
     39 
     40 	__asm("move %0, $sp" : "=r" (ret));
     41 
     42 	return ret;
     43 }
     44 
     45 #define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_SP])
     46 #define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_EPC])
     47 
     48 /*
     49  * Usable stack space below the ucontext_t.
     50  *    For a good time, see comments in pthread_switch.S and
     51  *    ../i386/pthread_switch.S about STACK_SWITCH.
     52  */
     53 #define STACKSPACE	(6*4)		/* 6 integer values */
     54 
     55 /*
     56  * Conversions between struct reg and struct mcontext. Used by
     57  * libpthread_dbg.  Note that in the "reg" structure, the indices
     58  * are the same as are used in the "frame" structure in the kernel.
     59  * These do NOT, in all cases, match the indices used in the
     60  * "mcontext" structure.
     61  */
     62 #include <mips/regnum.h>
     63 
     64 #define PTHREAD_UCONTEXT_TO_REG(reg, uc)				\
     65 do {									\
     66 	memcpy(&(reg)->r_regs[_R_AST], &(uc)->uc_mcontext.__gregs[_REG_AT],\
     67 	    sizeof(__greg_t) * 31);					\
     68 	(reg)->r_regs[_R_MULLO] = (uc)->uc_mcontext.__gregs[_REG_MDLO];	\
     69 	(reg)->r_regs[_R_MULHI] = (uc)->uc_mcontext.__gregs[_REG_MDHI];	\
     70 	(reg)->r_regs[_R_CAUSE] = (uc)->uc_mcontext.__gregs[_REG_CAUSE];\
     71 	(reg)->r_regs[_R_PC] = (uc)->uc_mcontext.__gregs[_REG_EPC];	\
     72 	(reg)->r_regs[_R_SR] = (uc)->uc_mcontext.__gregs[_REG_SR];	\
     73 } while (/*CONSTCOND*/0)
     74 
     75 #define PTHREAD_REG_TO_UCONTEXT(uc, reg)				\
     76 do {									\
     77 	memcpy(&(uc)->uc_mcontext.__gregs[_REG_AT], &(reg)->r_regs[_R_AST],\
     78 	    sizeof(__greg_t) * 31);					\
     79 	(uc)->uc_mcontext.__gregs[_REG_MDLO] = (reg)->r_regs[_R_MULLO];	\
     80 	(uc)->uc_mcontext.__gregs[_REG_MDHI] = (reg)->r_regs[_R_MULHI];	\
     81 	(uc)->uc_mcontext.__gregs[_REG_CAUSE] = (reg)->r_regs[_R_CAUSE];\
     82 	(uc)->uc_mcontext.__gregs[_REG_EPC] = (reg)->r_regs[_R_PC];	\
     83 	(uc)->uc_mcontext.__gregs[_REG_SR] = (reg)->r_regs[_R_SR];	\
     84 									\
     85 	(uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER;       	\
     86 } while (/*CONSTCOND*/0)
     87 
     88 #define PTHREAD_UCONTEXT_TO_FPREG(freg, uc)       			\
     89 do {									\
     90 	memcpy((freg), &(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs,	\
     91 	    sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs));	\
     92 	(freg)->r_regs[_R_FSR - _FPBASE] =				\
     93 	    (uc)->uc_mcontext.__fpregs.__fp_csr;			\
     94 } while (/*CONSTCOND*/0)
     95 
     96 #define PTHREAD_FPREG_TO_UCONTEXT(uc, freg)				\
     97 do {						       	       		\
     98 	memcpy(&(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs, (freg),	\
     99 	    sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs));	\
    100 	(uc)->uc_mcontext.__fpregs.__fp_csr =				\
    101 	    (freg)->r_regs[_R_FSR - _FPBASE];				\
    102 									\
    103 	(uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER;       	\
    104 } while (/*CONSTCOND*/0)
    105 
    106 #endif /* !_LIB_PTHREAD_MIPS_MD_H */
    107