1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * This header file distributed under the terms of the CDDL. 23 * Portions Copyright 2008 Sun Microsystems, Inc. All Rights reserved. 24 */ 25 #ifndef _SYS_STACK_H 26 #define _SYS_STACK_H 27 28 #include <pthread.h> 29 30 #define STACK_BIAS 0 31 32 #ifdef __USE_GNU 33 34 static inline int 35 stack_getbounds(stack_t *sp) 36 { 37 pthread_attr_t attr; 38 int rc; 39 40 rc = pthread_getattr_np(pthread_self(), &attr); 41 if (rc) 42 return (rc); 43 44 rc = pthread_attr_getstack(&attr, &sp->ss_sp, &sp->ss_size); 45 if (rc == 0) 46 sp->ss_flags = 0; 47 48 pthread_attr_destroy(&attr); 49 50 return (rc); 51 } 52 53 static inline int 54 thr_stksegment(stack_t *sp) 55 { 56 int rc; 57 58 rc = stack_getbounds(sp); 59 if (rc) 60 return (rc); 61 62 /* 63 * thr_stksegment() is expected to set sp.ss_sp to the high stack 64 * address, but the stack_getbounds() interface is expected to 65 * set sp.ss_sp to the low address. Adjust accordingly. 66 */ 67 sp->ss_sp = (void *)(((uintptr_t)sp->ss_sp) + sp->ss_size); 68 sp->ss_flags = 0; 69 70 return (rc); 71 } 72 73 #endif /* __USE_GNU */ 74 #endif /* _SYS_STACK_H */ 75