1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392
|
From bb45113bc9aed952a499cd1c53988dc81f597582 Mon Sep 17 00:00:00 2001
From: Al Stone <ahs3@redhat.com>
Date: Thu, 15 Oct 2020 11:53:33 -0600
Subject: [PATCH 01/40] Add in basic infrastructure for big-endian support
This adds in some basic functions -- AcpiUtReadUint32(), for example,
to read a UINT32 value in little-endian form and return it in host-native
format -- along with AcpiUtWriteUint() that writes out an integer in
host-native format as a little-endian value.
But, to do that, I'm adding the functions in a new file: utendian.c. So,
the header files need fixing, and the makefiles need to be sure to compile
the new code.
However, this sets things up for the future, where endian-aware code can
be added as the need is uncovered. For now, these functions cover all of
the cases I know about.
Signed-off-by: Al Stone <ahs3@redhat.com>
generate/unix/acpibin/Makefile | 1 +
generate/unix/acpidump/Makefile | 1 +
generate/unix/acpiexamples/Makefile | 1 +
generate/unix/acpiexec/Makefile | 1 +
generate/unix/acpihelp/Makefile | 1 +
generate/unix/iasl/Makefile | 1 +
source/components/utilities/utendian.c | 205 +++++++++++++++++++++++++
source/include/acutils.h | 26 ++++
source/include/platform/aclinux.h | 5 +
9 files changed, 242 insertions(+)
create mode 100644 source/components/utilities/utendian.c
@@ -37,6 +37,7 @@ OBJECTS = \
$(OBJDIR)/utcache.o\
$(OBJDIR)/utdebug.o\
$(OBJDIR)/utdecode.o\
+ $(OBJDIR)/utendian.o\
$(OBJDIR)/utexcep.o\
$(OBJDIR)/utglobal.o\
$(OBJDIR)/utlock.o\
@@ -36,6 +36,7 @@ OBJECTS = \
$(OBJDIR)/osunixdir.o\
$(OBJDIR)/osunixmap.o\
$(OBJDIR)/osunixxf.o\
+ $(OBJDIR)/utendian.o\
$(OBJDIR)/tbprint.o\
$(OBJDIR)/tbxfroot.o\
$(OBJDIR)/utascii.o\
@@ -139,6 +139,7 @@ OBJECTS = \
$(OBJDIR)/utdebug.o\
$(OBJDIR)/utdecode.o\
$(OBJDIR)/utdelete.o\
+ $(OBJDIR)/utendian.o\
$(OBJDIR)/uterror.o\
$(OBJDIR)/uteval.o\
$(OBJDIR)/utexcep.o\
@@ -214,6 +214,7 @@ OBJECTS = \
$(OBJDIR)/utdebug.o\
$(OBJDIR)/utdecode.o\
$(OBJDIR)/utdelete.o\
+ $(OBJDIR)/utendian.o\
$(OBJDIR)/uterror.o\
$(OBJDIR)/uteval.o\
$(OBJDIR)/utexcep.o\
@@ -43,6 +43,7 @@ OBJECTS = \
$(OBJDIR)/getopt.o\
$(OBJDIR)/osunixxf.o\
$(OBJDIR)/utdebug.o\
+ $(OBJDIR)/utendian.o\
$(OBJDIR)/utexcep.o\
$(OBJDIR)/utglobal.o\
$(OBJDIR)/uthex.o\
@@ -225,6 +225,7 @@ OBJECTS = \
$(OBJDIR)/utdebug.o\
$(OBJDIR)/utdecode.o\
$(OBJDIR)/utdelete.o\
+ $(OBJDIR)/utendian.o\
$(OBJDIR)/uterror.o\
$(OBJDIR)/utexcep.o\
$(OBJDIR)/utglobal.o\
@@ -0,0 +1,225 @@
+/******************************************************************************
+ *
+ * Module Name: utendian -- byte swapping support for other-endianness
+ *
+ *****************************************************************************/
+
+/*****************************************************************************
+ *
+ * Copyright (c) 2020, Al Stone <ahs3@redhat.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Alternatively, you may choose to be licensed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ *****************************************************************************/
+
+#include "acpi.h"
+#include "accommon.h"
+
+#define _COMPONENT ACPI_COMPILER
+ ACPI_MODULE_NAME ("utendian")
+
+
+/*
+ * Endianness support functions.
+ *
+ * Ultimately, everything in ACPI tables or AML must be in little-endian
+ * format. However, we sometimes find it necessary to run on a big-endian
+ * machine and create or read those little-endian values. This is a small
+ * libary of functions to make that easier, and more visible.
+ *
+ */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiUtReadUint16
+ *
+ * PARAMETERS: Src - location containing the little-endian
+ * value
+ *
+ * RETURN: UINT16 value in host-native form
+ *
+ * DESCRIPTION: Read a UINT16 little-endian value from a given location
+ * and return it in host-native form
+ *
+ ******************************************************************************/
+
+#if defined(ACPI_BIG_ENDIAN)
+UINT16 AcpiUtReadUint16 (void *SrcPtr)
+{
+ UINT16 Result = 0;
+ UINT8 *Dst = (UINT8 *)&Result;
+ UINT8 *Src = (UINT8 *)SrcPtr;
+
+ Dst[0] = Src[1];
+ Dst[1] = Src[0];
+
+ return Result;
+}
+#else
+UINT16 AcpiUtReadUint16 (void *SrcPtr) { return *(UINT16 *)SrcPtr; }
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiUtReadUint32
+ *
+ * PARAMETERS: Src - location containing the little-endian
+ * value
+ *
+ * RETURN: UINT32 value in host-native form
+ *
+ * DESCRIPTION: Read a UINT32 little-endian value from a given location
+ * and return it in host-native form
+ *
+ ******************************************************************************/
+
+#if defined(ACPI_BIG_ENDIAN)
+UINT32 AcpiUtReadUint32 (void *SrcPtr)
+{
+ UINT32 Result = 0;
+ UINT8 *Dst = (UINT8 *)&Result;
+ UINT8 *Src = (UINT8 *)SrcPtr;
+
+ Dst[0] = Src[3];
+ Dst[1] = Src[2];
+ Dst[2] = Src[1];
+ Dst[3] = Src[0];
+
+ return Result;
+}
+#else
+UINT32 AcpiUtReadUint32 (void *SrcPtr) { return *(UINT32 *)SrcPtr; }
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiUtReadUint64
+ *
+ * PARAMETERS: Src - location containing the little-endian
+ * value
+ *
+ * RETURN: UINT64 value in host-native form
+ *
+ * DESCRIPTION: Read a UINT64 little-endian value from a given location
+ * and return it in host-native form
+ *
+ ******************************************************************************/
+
+#if defined(ACPI_BIG_ENDIAN)
+UINT64 AcpiUtReadUint64 (void *SrcPtr)
+{
+ UINT64 Result = 0;
+ UINT8 *Dst = (UINT8 *)&Result;
+ UINT8 *Src = (UINT8 *)SrcPtr;
+
+ Dst[0] = Src[7];
+ Dst[1] = Src[6];
+ Dst[2] = Src[5];
+ Dst[3] = Src[4];
+ Dst[4] = Src[3];
+ Dst[5] = Src[2];
+ Dst[6] = Src[1];
+ Dst[7] = Src[0];
+
+ return Result;
+}
+#else
+UINT64 AcpiUtReadUint64 (void *SrcPtr) {
+#if defined(ACPI_MISALIGNMENT_NOT_SUPPORTED)
+ UINT64 Result = 0;
+ UINT8 *Dst = (UINT8 *)&Result;
+ UINT8 *Src = (UINT8 *)SrcPtr;
+
+ Dst[7] = Src[7];
+ Dst[6] = Src[6];
+ Dst[5] = Src[5];
+ Dst[4] = Src[4];
+ Dst[3] = Src[3];
+ Dst[2] = Src[2];
+ Dst[1] = Src[1];
+ Dst[0] = Src[0];
+
+ return Result;
+
+#else
+ return *(UINT64 *)SrcPtr;
+#endif
+}
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiUtWriteUint
+ *
+ * PARAMETERS: DstPtr - where to place the retrieved value
+ * DstLength - space in bytes for this int type
+ * SrcPtr - where the little-endian value lives
+ * SrcLength - space in bytes for this int type
+ *
+ * RETURN: None.
+ *
+ * DESCRIPTION: Write a host-native integer value of the given size, and
+ * store it in the location specified in little-endian form.
+ * Given the amount of integer type casting done, this general
+ * version seems the most useful (vs 32->32, 32->16, 16->32,
+ * ad infinitum)
+ *
+ ******************************************************************************/
+
+#if defined(ACPI_BIG_ENDIAN)
+void AcpiUtWriteUint (void *DstPtr, int DstLength,
+ const void *SrcPtr, const int SrcLength)
+{
+ UINT8 *Dst = (UINT8 *)DstPtr;
+ UINT8 *Src = (UINT8 *)SrcPtr;
+ int Length;
+ int ii;
+
+ Length = SrcLength >= DstLength ? DstLength : SrcLength;
+ for (ii = 0; ii < Length; ii++)
+ Dst[ii] = Src[SrcLength - ii - 1];
+
+}
+#else
+void AcpiUtWriteUint (void *DstPtr, int DstLength,
+ const void *SrcPtr, const int SrcLength)
+{
+ UINT8 *Dst = (UINT8 *)DstPtr;
+ UINT8 *Src = (UINT8 *)SrcPtr;
+ uint Length;
+
+ Length = SrcLength > DstLength ? DstLength : SrcLength;
+ memcpy(Dst, Src, Length);
+}
+#endif
+
@@ -1161,4 +1161,30 @@ AcpiUtConvertStringToUuid (
UINT8 *UuidBuffer);
#endif
+/*
+ * utendian -- byte-swapping for big-endian support
+ */
+#if defined(ACPI_ASL_COMPILER) || defined(ACPI_EXEC_APP) || \
+ defined(ACPI_HELP_APP) || defined(ACPI_DUMP_APP) || \
+ defined(ACPI_EXAMPLE_APP) || defined(ACPI_BIN_APP)
+UINT32
+AcpiUtReadUint32 (
+ void *SrcPtr);
+
+UINT16
+AcpiUtReadUint16 (
+ void *SrcPtr);
+
+UINT64
+AcpiUtReadUint64 (
+ void *SrcPtr);
+
+void
+AcpiUtWriteUint (
+ void *DstPtr,
+ int DstLength,
+ const void *SrcPtr,
+ const int SrcLength);
+#endif
+
#endif /* _ACUTILS_H */
@@ -198,6 +198,7 @@
#ifdef ACPI_USE_STANDARD_HEADERS
#include <unistd.h>
+#include <endian.h>
#endif
/* Define/disable kernel-specific declarators */
@@ -233,6 +234,10 @@
#define __cdecl
#endif
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define ACPI_BIG_ENDIAN
+#endif
+
#endif /* __KERNEL__ */
#endif /* __ACLINUX_H__ */
|