1 /******************************************************************************
2 *
3 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
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 #include "acparser.h"
48 #include "amlcode.h"
49
50 #define _COMPONENT ACPI_EXECUTER
51 ACPI_MODULE_NAME("exoparg3")
52
53 /*!
54 * Naming convention for AML interpreter execution routines.
55 *
56 * The routines that begin execution of AML opcodes are named with a common
57 * convention based upon the number of arguments, the number of target operands,
58 * and whether or not a value is returned:
59 *
60 * AcpiExOpcode_xA_yT_zR
61 *
62 * Where:
63 *
64 * xA - ARGUMENTS: The number of arguments (input operands) that are
65 * required for this opcode type (1 through 6 args).
66 * yT - TARGETS: The number of targets (output operands) that are required
67 * for this opcode type (0, 1, or 2 targets).
68 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
69 * as the function return (0 or 1).
70 *
71 * The AcpiExOpcode* functions are called via the Dispatcher component with
72 * fully resolved operands.
73 !*/
74 /*******************************************************************************
75 *
76 * FUNCTION: acpi_ex_opcode_3A_0T_0R
77 *
78 * PARAMETERS: walk_state - Current walk state
79 *
80 * RETURN: Status
81 *
82 * DESCRIPTION: Execute Triadic operator (3 operands)
83 *
84 ******************************************************************************/
acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state * walk_state)85 acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state)
86 {
87 union acpi_operand_object **operand = &walk_state->operands[0];
88 struct acpi_signal_fatal_info *fatal;
89 acpi_status status = AE_OK;
90
91 ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_0T_0R,
92 acpi_ps_get_opcode_name(walk_state->opcode));
93
94 switch (walk_state->opcode) {
95 case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */
96
97 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
98 "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
99 (u32) operand[0]->integer.value,
100 (u32) operand[1]->integer.value,
101 (u32) operand[2]->integer.value));
102
103 fatal = ACPI_ALLOCATE(sizeof(struct acpi_signal_fatal_info));
104 if (fatal) {
105 fatal->type = (u32) operand[0]->integer.value;
106 fatal->code = (u32) operand[1]->integer.value;
107 fatal->argument = (u32) operand[2]->integer.value;
108 }
109
110 /* Always signal the OS! */
111
112 status = acpi_os_signal(ACPI_SIGNAL_FATAL, fatal);
113
114 /* Might return while OS is shutting down, just continue */
115
116 ACPI_FREE(fatal);
117 break;
118
119 default:
120
121 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
122 walk_state->opcode));
123 status = AE_AML_BAD_OPCODE;
124 goto cleanup;
125 }
126
127 cleanup:
128
129 return_ACPI_STATUS(status);
130 }
131
132 /*******************************************************************************
133 *
134 * FUNCTION: acpi_ex_opcode_3A_1T_1R
135 *
136 * PARAMETERS: walk_state - Current walk state
137 *
138 * RETURN: Status
139 *
140 * DESCRIPTION: Execute Triadic operator (3 operands)
141 *
142 ******************************************************************************/
143
acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state * walk_state)144 acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state)
145 {
146 union acpi_operand_object **operand = &walk_state->operands[0];
147 union acpi_operand_object *return_desc = NULL;
148 char *buffer = NULL;
149 acpi_status status = AE_OK;
150 u64 index;
151 acpi_size length;
152
153 ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_1T_1R,
154 acpi_ps_get_opcode_name(walk_state->opcode));
155
156 switch (walk_state->opcode) {
157 case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
158 /*
159 * Create the return object. The Source operand is guaranteed to be
160 * either a String or a Buffer, so just use its type.
161 */
162 return_desc = acpi_ut_create_internal_object((operand[0])->
163 common.type);
164 if (!return_desc) {
165 status = AE_NO_MEMORY;
166 goto cleanup;
167 }
168
169 /* Get the Integer values from the objects */
170
171 index = operand[1]->integer.value;
172 length = (acpi_size) operand[2]->integer.value;
173
174 /*
175 * If the index is beyond the length of the String/Buffer, or if the
176 * requested length is zero, return a zero-length String/Buffer
177 */
178 if (index >= operand[0]->string.length) {
179 length = 0;
180 }
181
182 /* Truncate request if larger than the actual String/Buffer */
183
184 else if ((index + length) > operand[0]->string.length) {
185 length = (acpi_size) operand[0]->string.length -
186 (acpi_size) index;
187 }
188
189 /* Strings always have a sub-pointer, not so for buffers */
190
191 switch ((operand[0])->common.type) {
192 case ACPI_TYPE_STRING:
193
194 /* Always allocate a new buffer for the String */
195
196 buffer = ACPI_ALLOCATE_ZEROED((acpi_size) length + 1);
197 if (!buffer) {
198 status = AE_NO_MEMORY;
199 goto cleanup;
200 }
201 break;
202
203 case ACPI_TYPE_BUFFER:
204
205 /* If the requested length is zero, don't allocate a buffer */
206
207 if (length > 0) {
208
209 /* Allocate a new buffer for the Buffer */
210
211 buffer = ACPI_ALLOCATE_ZEROED(length);
212 if (!buffer) {
213 status = AE_NO_MEMORY;
214 goto cleanup;
215 }
216 }
217 break;
218
219 default: /* Should not happen */
220
221 status = AE_AML_OPERAND_TYPE;
222 goto cleanup;
223 }
224
225 if (buffer) {
226
227 /* We have a buffer, copy the portion requested */
228
229 ACPI_MEMCPY(buffer, operand[0]->string.pointer + index,
230 length);
231 }
232
233 /* Set the length of the new String/Buffer */
234
235 return_desc->string.pointer = buffer;
236 return_desc->string.length = (u32) length;
237
238 /* Mark buffer initialized */
239
240 return_desc->buffer.flags |= AOPOBJ_DATA_VALID;
241 break;
242
243 default:
244
245 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
246 walk_state->opcode));
247 status = AE_AML_BAD_OPCODE;
248 goto cleanup;
249 }
250
251 /* Store the result in the target */
252
253 status = acpi_ex_store(return_desc, operand[3], walk_state);
254
255 cleanup:
256
257 /* Delete return object on error */
258
259 if (ACPI_FAILURE(status) || walk_state->result_obj) {
260 acpi_ut_remove_reference(return_desc);
261 walk_state->result_obj = NULL;
262 }
263
264 /* Set the return object and exit */
265
266 else {
267 walk_state->result_obj = return_desc;
268 }
269 return_ACPI_STATUS(status);
270 }
271