1 /* $NetBSD: pthread_md.h,v 1.2 2003/01/18 10:34:17 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_ALPHA_MD_H 40 #define _LIB_PTHREAD_ALPHA_MD_H 41 42 static __inline long 43 pthread__sp(void) 44 { 45 long ret; 46 47 __asm("mov $30, %0" : "=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_PC]) 54 55 /* 56 * Set initial, sane values for registers whose values aren't just 57 * "don't care". 58 * 0x0008 is ALPHA_PSL_USERSET from arch/alpha/include/alpha_cpu.h 59 */ 60 #define _INITCONTEXT_U_MD(ucp) \ 61 (ucp)->uc_mcontext.__gregs[_REG_PS] = 0x0008; 62 #define STACKSPACE 32 /* 4 quad values */ 63 /* 64 * Conversions between struct reg and struct mcontext. Used by 65 * libpthread_dbg. 66 */ 67 68 #define PTHREAD_UCONTEXT_TO_REG(reg, uc) do { \ 69 memcpy(&(reg)->r_regs, &(uc)->uc_mcontext.__gregs, \ 70 31 * sizeof(__greg_t)); \ 71 (reg)->r_regs[R_ZERO] = (uc)->uc_mcontext.__gregs[_REG_PC]; \ 72 } while (/*CONSTCOND*/0) 73 74 #define PTHREAD_REG_TO_UCONTEXT(uc, reg) do { \ 75 memcpy(&(uc)->uc_mcontext.__gregs, &(reg)->r_regs, \ 76 31 * sizeof(__greg_t)); \ 77 (uc)->uc_mcontext.__gregs[_REG_PC] = (reg)->r_regs[R_ZERO]; \ 78 (uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER; \ 79 } while (/*CONSTCOND*/0) 80 81 #define PTHREAD_UCONTEXT_TO_FPREG(freg, uc) \ 82 memcpy((freg), &(uc)->uc_mcontext.__fpregs, \ 83 sizeof(struct fpreg)) \ 84 85 #define PTHREAD_FPREG_TO_UCONTEXT(uc, freg) do { \ 86 memcpy(&(uc)->uc_mcontext.__fpregs, (freg), \ 87 sizeof(struct fpreg)); \ 88 (uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER; \ 89 } while (/*CONSTCOND*/0) 90 91 #endif /* _LIB_PTHREAD_ALPHA_MD_H */ 92