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 http://www.opensolaris.org/os/licensing. 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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <sys/systm.h> 30 #include <sys/errno.h> 31 #include <sys/cpuvar.h> 32 #include <sys/archsystm.h> 33 #include <sys/proc.h> 34 #include <sys/brand.h> 35 #include <sys/lx_brand.h> 36 #include <sys/lx_ldt.h> 37 38 long 39 lx_get_thread_area(struct ldt_info *inf) 40 { 41 struct lx_lwp_data *jlwp = ttolxlwp(curthread); 42 struct ldt_info ldt_inf; 43 user_desc_t *dscrp; 44 int entry; 45 46 if (fuword32(&inf->entry_number, (uint32_t *)&entry)) 47 return (set_errno(EFAULT)); 48 49 if (entry < GDT_TLSMIN || entry > GDT_TLSMAX) 50 return (set_errno(EINVAL)); 51 52 dscrp = jlwp->br_tls + entry - GDT_TLSMIN; 53 54 /* 55 * convert the solaris ldt to the linux format expected by the 56 * caller 57 */ 58 DESC_TO_LDT_INFO(dscrp, &ldt_inf); 59 ldt_inf.entry_number = entry; 60 61 if (copyout(&ldt_inf, inf, sizeof (struct ldt_info))) 62 return (set_errno(EFAULT)); 63 64 return (0); 65 } 66 67 long 68 lx_set_thread_area(struct ldt_info *inf) 69 { 70 struct lx_lwp_data *jlwp = ttolxlwp(curthread); 71 struct ldt_info ldt_inf; 72 user_desc_t *dscrp; 73 int entry; 74 int i; 75 76 if (copyin(inf, &ldt_inf, sizeof (ldt_inf))) 77 return (set_errno(EFAULT)); 78 79 entry = ldt_inf.entry_number; 80 if (entry == -1) { 81 /* 82 * find an empty entry in the tls for this thread 83 */ 84 for (i = 0, dscrp = jlwp->br_tls; 85 i < LX_TLSNUM; i++, dscrp++) 86 if (((unsigned long *)dscrp)[0] == 0 && 87 ((unsigned long *)dscrp)[1] == 0) 88 break; 89 90 if (i < LX_TLSNUM) { 91 /* 92 * found one 93 */ 94 entry = i + GDT_TLSMIN; 95 if (suword32(&inf->entry_number, entry)) 96 return (set_errno(EFAULT)); 97 } else { 98 return (set_errno(ESRCH)); 99 } 100 } 101 102 if (entry < GDT_TLSMIN || entry > GDT_TLSMAX) 103 return (set_errno(EINVAL)); 104 105 /* 106 * convert the linux ldt info to standard intel descriptor 107 */ 108 dscrp = jlwp->br_tls + entry - GDT_TLSMIN; 109 110 if (LDT_INFO_EMPTY(&ldt_inf)) { 111 ((unsigned long *)dscrp)[0] = 0; 112 ((unsigned long *)dscrp)[1] = 0; 113 } else { 114 LDT_INFO_TO_DESC(&ldt_inf, dscrp); 115 } 116 117 /* 118 * update the gdt with the new descriptor 119 */ 120 kpreempt_disable(); 121 122 for (i = 0, dscrp = jlwp->br_tls; i < LX_TLSNUM; i++, dscrp++) 123 lx_set_gdt(GDT_TLSMIN + i, dscrp); 124 125 kpreempt_enable(); 126 127 return (0); 128 }