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1
2/******************************************************************************
3 *
4 * Module Name: exstorob - AML Interpreter object store support, store to object
5 *
6 *****************************************************************************/
7
8/*
9 * Copyright (C) 2000 - 2012, Intel Corp.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45#include <acpi/acpi.h>
46#include "accommon.h"
47#include "acinterp.h"
48
49#define _COMPONENT ACPI_EXECUTER
50ACPI_MODULE_NAME("exstorob")
51
52/*******************************************************************************
53 *
54 * FUNCTION: acpi_ex_store_buffer_to_buffer
55 *
56 * PARAMETERS: source_desc - Source object to copy
57 * target_desc - Destination object of the copy
58 *
59 * RETURN: Status
60 *
61 * DESCRIPTION: Copy a buffer object to another buffer object.
62 *
63 ******************************************************************************/
64acpi_status
65acpi_ex_store_buffer_to_buffer(union acpi_operand_object *source_desc,
66 union acpi_operand_object *target_desc)
67{
68 u32 length;
69 u8 *buffer;
70
71 ACPI_FUNCTION_TRACE_PTR(ex_store_buffer_to_buffer, source_desc);
72
73 /* If Source and Target are the same, just return */
74
75 if (source_desc == target_desc) {
76 return_ACPI_STATUS(AE_OK);
77 }
78
79 /* We know that source_desc is a buffer by now */
80
81 buffer = ACPI_CAST_PTR(u8, source_desc->buffer.pointer);
82 length = source_desc->buffer.length;
83
84 /*
85 * If target is a buffer of length zero or is a static buffer,
86 * allocate a new buffer of the proper length
87 */
88 if ((target_desc->buffer.length == 0) ||
89 (target_desc->common.flags & AOPOBJ_STATIC_POINTER)) {
90 target_desc->buffer.pointer = ACPI_ALLOCATE(length);
91 if (!target_desc->buffer.pointer) {
92 return_ACPI_STATUS(AE_NO_MEMORY);
93 }
94
95 target_desc->buffer.length = length;
96 }
97
98 /* Copy source buffer to target buffer */
99
100 if (length <= target_desc->buffer.length) {
101
102 /* Clear existing buffer and copy in the new one */
103
104 ACPI_MEMSET(target_desc->buffer.pointer, 0,
105 target_desc->buffer.length);
106 ACPI_MEMCPY(target_desc->buffer.pointer, buffer, length);
107
108#ifdef ACPI_OBSOLETE_BEHAVIOR
109 /*
110 * NOTE: ACPI versions up to 3.0 specified that the buffer must be
111 * truncated if the string is smaller than the buffer. However, "other"
112 * implementations of ACPI never did this and thus became the defacto
113 * standard. ACPI 3.0_a changes this behavior such that the buffer
114 * is no longer truncated.
115 */
116
117 /*
118 * OBSOLETE BEHAVIOR:
119 * If the original source was a string, we must truncate the buffer,
120 * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer
121 * copy must not truncate the original buffer.
122 */
123 if (original_src_type == ACPI_TYPE_STRING) {
124
125 /* Set the new length of the target */
126
127 target_desc->buffer.length = length;
128 }
129#endif
130 } else {
131 /* Truncate the source, copy only what will fit */
132
133 ACPI_MEMCPY(target_desc->buffer.pointer, buffer,
134 target_desc->buffer.length);
135
136 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
137 "Truncating source buffer from %X to %X\n",
138 length, target_desc->buffer.length));
139 }
140
141 /* Copy flags */
142
143 target_desc->buffer.flags = source_desc->buffer.flags;
144 target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
145 return_ACPI_STATUS(AE_OK);
146}
147
148/*******************************************************************************
149 *
150 * FUNCTION: acpi_ex_store_string_to_string
151 *
152 * PARAMETERS: source_desc - Source object to copy
153 * target_desc - Destination object of the copy
154 *
155 * RETURN: Status
156 *
157 * DESCRIPTION: Copy a String object to another String object
158 *
159 ******************************************************************************/
160
161acpi_status
162acpi_ex_store_string_to_string(union acpi_operand_object *source_desc,
163 union acpi_operand_object *target_desc)
164{
165 u32 length;
166 u8 *buffer;
167
168 ACPI_FUNCTION_TRACE_PTR(ex_store_string_to_string, source_desc);
169
170 /* If Source and Target are the same, just return */
171
172 if (source_desc == target_desc) {
173 return_ACPI_STATUS(AE_OK);
174 }
175
176 /* We know that source_desc is a string by now */
177
178 buffer = ACPI_CAST_PTR(u8, source_desc->string.pointer);
179 length = source_desc->string.length;
180
181 /*
182 * Replace existing string value if it will fit and the string
183 * pointer is not a static pointer (part of an ACPI table)
184 */
185 if ((length < target_desc->string.length) &&
186 (!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
187 /*
188 * String will fit in existing non-static buffer.
189 * Clear old string and copy in the new one
190 */
191 ACPI_MEMSET(target_desc->string.pointer, 0,
192 (acpi_size) target_desc->string.length + 1);
193 ACPI_MEMCPY(target_desc->string.pointer, buffer, length);
194 } else {
195 /*
196 * Free the current buffer, then allocate a new buffer
197 * large enough to hold the value
198 */
199 if (target_desc->string.pointer &&
200 (!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
201
202 /* Only free if not a pointer into the DSDT */
203
204 ACPI_FREE(target_desc->string.pointer);
205 }
206
207 target_desc->string.pointer = ACPI_ALLOCATE_ZEROED((acpi_size)
208 length + 1);
209 if (!target_desc->string.pointer) {
210 return_ACPI_STATUS(AE_NO_MEMORY);
211 }
212
213 target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
214 ACPI_MEMCPY(target_desc->string.pointer, buffer, length);
215 }
216
217 /* Set the new target length */
218
219 target_desc->string.length = length;
220 return_ACPI_STATUS(AE_OK);
221}
1/******************************************************************************
2 *
3 * Module Name: exstorob - AML Interpreter object store support, store to object
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2014, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acinterp.h"
47
48#define _COMPONENT ACPI_EXECUTER
49ACPI_MODULE_NAME("exstorob")
50
51/*******************************************************************************
52 *
53 * FUNCTION: acpi_ex_store_buffer_to_buffer
54 *
55 * PARAMETERS: source_desc - Source object to copy
56 * target_desc - Destination object of the copy
57 *
58 * RETURN: Status
59 *
60 * DESCRIPTION: Copy a buffer object to another buffer object.
61 *
62 ******************************************************************************/
63acpi_status
64acpi_ex_store_buffer_to_buffer(union acpi_operand_object *source_desc,
65 union acpi_operand_object *target_desc)
66{
67 u32 length;
68 u8 *buffer;
69
70 ACPI_FUNCTION_TRACE_PTR(ex_store_buffer_to_buffer, source_desc);
71
72 /* If Source and Target are the same, just return */
73
74 if (source_desc == target_desc) {
75 return_ACPI_STATUS(AE_OK);
76 }
77
78 /* We know that source_desc is a buffer by now */
79
80 buffer = ACPI_CAST_PTR(u8, source_desc->buffer.pointer);
81 length = source_desc->buffer.length;
82
83 /*
84 * If target is a buffer of length zero or is a static buffer,
85 * allocate a new buffer of the proper length
86 */
87 if ((target_desc->buffer.length == 0) ||
88 (target_desc->common.flags & AOPOBJ_STATIC_POINTER)) {
89 target_desc->buffer.pointer = ACPI_ALLOCATE(length);
90 if (!target_desc->buffer.pointer) {
91 return_ACPI_STATUS(AE_NO_MEMORY);
92 }
93
94 target_desc->buffer.length = length;
95 }
96
97 /* Copy source buffer to target buffer */
98
99 if (length <= target_desc->buffer.length) {
100
101 /* Clear existing buffer and copy in the new one */
102
103 ACPI_MEMSET(target_desc->buffer.pointer, 0,
104 target_desc->buffer.length);
105 ACPI_MEMCPY(target_desc->buffer.pointer, buffer, length);
106
107#ifdef ACPI_OBSOLETE_BEHAVIOR
108 /*
109 * NOTE: ACPI versions up to 3.0 specified that the buffer must be
110 * truncated if the string is smaller than the buffer. However, "other"
111 * implementations of ACPI never did this and thus became the defacto
112 * standard. ACPI 3.0A changes this behavior such that the buffer
113 * is no longer truncated.
114 */
115
116 /*
117 * OBSOLETE BEHAVIOR:
118 * If the original source was a string, we must truncate the buffer,
119 * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer
120 * copy must not truncate the original buffer.
121 */
122 if (original_src_type == ACPI_TYPE_STRING) {
123
124 /* Set the new length of the target */
125
126 target_desc->buffer.length = length;
127 }
128#endif
129 } else {
130 /* Truncate the source, copy only what will fit */
131
132 ACPI_MEMCPY(target_desc->buffer.pointer, buffer,
133 target_desc->buffer.length);
134
135 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
136 "Truncating source buffer from %X to %X\n",
137 length, target_desc->buffer.length));
138 }
139
140 /* Copy flags */
141
142 target_desc->buffer.flags = source_desc->buffer.flags;
143 target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
144 return_ACPI_STATUS(AE_OK);
145}
146
147/*******************************************************************************
148 *
149 * FUNCTION: acpi_ex_store_string_to_string
150 *
151 * PARAMETERS: source_desc - Source object to copy
152 * target_desc - Destination object of the copy
153 *
154 * RETURN: Status
155 *
156 * DESCRIPTION: Copy a String object to another String object
157 *
158 ******************************************************************************/
159
160acpi_status
161acpi_ex_store_string_to_string(union acpi_operand_object *source_desc,
162 union acpi_operand_object *target_desc)
163{
164 u32 length;
165 u8 *buffer;
166
167 ACPI_FUNCTION_TRACE_PTR(ex_store_string_to_string, source_desc);
168
169 /* If Source and Target are the same, just return */
170
171 if (source_desc == target_desc) {
172 return_ACPI_STATUS(AE_OK);
173 }
174
175 /* We know that source_desc is a string by now */
176
177 buffer = ACPI_CAST_PTR(u8, source_desc->string.pointer);
178 length = source_desc->string.length;
179
180 /*
181 * Replace existing string value if it will fit and the string
182 * pointer is not a static pointer (part of an ACPI table)
183 */
184 if ((length < target_desc->string.length) &&
185 (!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
186 /*
187 * String will fit in existing non-static buffer.
188 * Clear old string and copy in the new one
189 */
190 ACPI_MEMSET(target_desc->string.pointer, 0,
191 (acpi_size) target_desc->string.length + 1);
192 ACPI_MEMCPY(target_desc->string.pointer, buffer, length);
193 } else {
194 /*
195 * Free the current buffer, then allocate a new buffer
196 * large enough to hold the value
197 */
198 if (target_desc->string.pointer &&
199 (!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
200
201 /* Only free if not a pointer into the DSDT */
202
203 ACPI_FREE(target_desc->string.pointer);
204 }
205
206 target_desc->string.pointer = ACPI_ALLOCATE_ZEROED((acpi_size)
207 length + 1);
208 if (!target_desc->string.pointer) {
209 return_ACPI_STATUS(AE_NO_MEMORY);
210 }
211
212 target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
213 ACPI_MEMCPY(target_desc->string.pointer, buffer, length);
214 }
215
216 /* Set the new target length */
217
218 target_desc->string.length = length;
219 return_ACPI_STATUS(AE_OK);
220}