fat.lst

au1200下的boot代码

 314 019a 0000     		.align	2
 315              	$LC24:
 316 019c 46696C65 		.ascii	"File Info:\000"
 316      20496E66 
 316      6F3A00
 317 01a7 00       		.align	2
 318              	$LC25:
 319 01a8 0A       		.ascii	"\n"
 320 01a9 46696C65 		.ascii	"Filename: \000"
 320      6E616D65 
 320      3A2000
 321              		.align	2
 322              	$LC26:
 323 01b4 2E00     		.ascii	".\000"
 324 01b6 0000     		.align	2
 325              	$LC27:
 326 01b8 0A       		.ascii	"\n"
 327 01b9 41747472 		.ascii	"Attributes: %X\000"
 327      69627574 
 327      65733A20 
 327      255800
 328              		.align	2
 329              	$LC28:
 330 01c8 0A       		.ascii	"\n"
 331 01c9 53697A65 		.ascii	"Size: %d Bytes\000"
 331      3A202564 
 331      20427974 
 331      657300
 332              		.align	2
 333              	$LC29:
 334 01d8 0A       		.ascii	"\n"
 335 01d9 53746172 		.ascii	"Start Cluster: %d\n\000"
 335      7420436C 
 335      75737465 
 335      723A2025 
 335      640A00
 336              		.align	2
 337              	$LC30:
 338 01ec 4641544F 		.ascii	"FATOffset: %d\n\000"
 338      66667365 
 338      743A2025 
 338      640A00
 339 01fb 00       		.align	2
 340              	$LC31:
 341 01fc 54686973 		.ascii	"ThisFATSecNum: %d\n\000"
 341      46415453 
 341      65634E75 
 341      6D3A2025 
 341      640A00
 342 020f 00       		.align	2
 343              	$LC32:
 344 0210 54686973 		.ascii	"ThisFATEntOffset: %d\n\000"
 344      46415445 
 344      6E744F66 
 344      66736574 
 344      3A202564 
GAS LISTING /tmp/ccZKkRKo.s 			page 12


 345 0226 0000     		.text
 346              		.align	2
 347              		.globl	displayDirectoryEntry
 348              		.ent	displayDirectoryEntry
 349              		.type	displayDirectoryEntry, @function
 350              	displayDirectoryEntry:
 351              	$LFB3:
 184:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** }
 185:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 
 186:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** void displayDirectoryEntry(FATDirEntry* handle)
 187:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** {
 352              		.loc 1 187 0
 353              		.frame	$sp,8224,$31		# vars= 8192, regs= 4/0, args= 16, gp= 0
 354              		.mask	0x80070000,-4
 355              		.fmask	0x00000000,0
 356              		.set	noreorder
 357              		.set	nomacro
 358              		
 359 01fc E0DFBD27 		addiu	$sp,$sp,-8224
 360              	$LCFI6:
 361 0200 1420B1AF 		sw	$17,8212($sp)
 362              	$LCFI7:
 363 0204 21888000 		move	$17,$4
 188:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	int FATOffset, ThisFATSecNum, ThisFATEntOffset;
 189:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	int i;
 190:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	short buffer[4096];
 191:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	
 192:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("\n-------------------------------\n");
 364              		.loc 1 192 0
 365 0208 0000043C 		lui	$4,%hi($LC0)
 366 020c 00008424 		addiu	$4,$4,%lo($LC0)
 367              		.loc 1 187 0
 368 0210 1C20BFAF 		sw	$31,8220($sp)
 369              	$LCFI8:
 370 0214 1820B2AF 		sw	$18,8216($sp)
 371              	$LCFI9:
 372              		.loc 1 187 0
 373              	$LCFI10:
 374              		.loc 1 192 0
 375 0218 0000000C 		jal	printf
 376 021c 1020B0AF 		sw	$16,8208($sp)
 377              	
 193:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("File Info:");
 378              		.loc 1 193 0
 379 0220 0000043C 		lui	$4,%hi($LC24)
 380 0224 0000000C 		jal	printf
 381 0228 00008424 		addiu	$4,$4,%lo($LC24)
 382              	
 194:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("\nFilename: ");
 383              		.loc 1 194 0
 384 022c 0000043C 		lui	$4,%hi($LC25)
 385 0230 0000000C 		jal	printf
 386 0234 00008424 		addiu	$4,$4,%lo($LC25)
 387              	
 195:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	for(i = 0; i < 8; ++i)
 388              		.loc 1 195 0
 389 0238 21800000 		move	$16,$0
GAS LISTING /tmp/ccZKkRKo.s 			page 13


 390 023c 0000123C 		lui	$18,%hi($LC3)
 196:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	{
 197:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 		printf("%c", handle->name[i]);
 391              		.loc 1 197 0
 392 0240 21103002 		addu	$2,$17,$16
 393              	$L30:
 394 0244 00004590 		lbu	$5,0($2)
 395              		.loc 1 195 0
 396 0248 01001026 		addiu	$16,$16,1
 397              		.loc 1 197 0
 398 024c 0000000C 		jal	printf
 399 0250 00004426 		addiu	$4,$18,%lo($LC3)
 400              	
 401              		.loc 1 195 0
 402 0254 0800022A 		slt	$2,$16,8
 403              		.loc 1 197 0
 404              		.loc 1 195 0
 405 0258 FAFF4014 		bne	$2,$0,$L30
 406 025c 21103002 		addu	$2,$17,$16
 407              	
 198:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	}
 199:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf(".");
 408              		.loc 1 199 0
 409 0260 0000043C 		lui	$4,%hi($LC26)
 410 0264 0000000C 		jal	printf
 411 0268 00008424 		addiu	$4,$4,%lo($LC26)
 412              	
 200:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	for(i = 0; i < 3; ++i)
 413              		.loc 1 200 0
 414 026c 21800000 		move	$16,$0
 201:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	{
 202:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 		printf("%c", handle->ext[i]);
 415              		.loc 1 202 0
 416 0270 21101102 		addu	$2,$16,$17
 417              	$L31:
 418 0274 08004590 		lbu	$5,8($2)
 419              		.loc 1 200 0
 420 0278 01001026 		addiu	$16,$16,1
 421              		.loc 1 202 0
 422 027c 0000000C 		jal	printf
 423 0280 00004426 		addiu	$4,$18,%lo($LC3)
 424              	
 425              		.loc 1 200 0
 426 0284 0300022A 		slt	$2,$16,3
 427              		.loc 1 202 0
 428              		.loc 1 200 0
 429 0288 FAFF4014 		bne	$2,$0,$L31
 430 028c 21101102 		addu	$2,$16,$17
 431              	
 203:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	}
 204:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 
 205:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("\nAttributes: %X", handle->attr);
 432              		.loc 1 205 0
 433 0290 0B002592 		lbu	$5,11($17)
 434 0294 0000043C 		lui	$4,%hi($LC27)
 435 0298 0000000C 		jal	printf
 436 029c 00008424 		addiu	$4,$4,%lo($LC27)
GAS LISTING /tmp/ccZKkRKo.s 			page 14


 437              	
 206:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("\nSize: %d Bytes", handle->size);
 438              		.loc 1 206 0
 439 02a0 1C00258E 		lw	$5,28($17)
 440 02a4 0000043C 		lui	$4,%hi($LC28)
 441 02a8 0000000C 		jal	printf
 442 02ac 00008424 		addiu	$4,$4,%lo($LC28)
 443              	
 207:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("\nStart Cluster: %d\n", handle->start);
 444              		.loc 1 207 0
 445 02b0 1A002596 		lhu	$5,26($17)
 446 02b4 0000043C 		lui	$4,%hi($LC29)
 447 02b8 0000000C 		jal	printf
 448 02bc 00008424 		addiu	$4,$4,%lo($LC29)
 449              	
 208:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	
 209:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	FATOffset = handle->start * 2;
 210:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	ThisFATSecNum = fat.reservedSectorCount + (FATOffset / fat.bytesPerSector);
 450              		.loc 1 210 0
 451 02c0 0000023C 		lui	$2,%hi(fat)
 452 02c4 00004224 		addiu	$2,$2,%lo(fat)
 453              		.loc 1 209 0
 454 02c8 1A002596 		lhu	$5,26($17)
 455              		.loc 1 210 0
 456 02cc 0002438C 		lw	$3,512($2)
 457 02d0 0402508C 		lw	$16,516($2)
 458              		.loc 1 209 0
 459 02d4 40280500 		sll	$5,$5,1
 460              		.loc 1 210 0
 461 02d8 1A00A300 		div	$0,$5,$3
 462 02dc 02006014 		bne	$3,$0,1f
 463 02e0 00000000 		nop
 464 02e4 0D000700 		break	7
 465              	1:
 211:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	ThisFATEntOffset = FATOffset % fat.bytesPerSector;
 212:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 
 213:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("FATOffset: %d\n", FATOffset);
 466              		.loc 1 213 0
 467 02e8 0000043C 		lui	$4,%hi($LC30)
 468 02ec 00008424 		addiu	$4,$4,%lo($LC30)
 469              		.loc 1 210 0
 470 02f0 12180000 		mflo	$3
 471 02f4 10880000 		mfhi	$17
 472              		.loc 1 213 0
 473 02f8 0000000C 		jal	printf
 474 02fc 21800302 		addu	$16,$16,$3
 475              	
 214:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("ThisFATSecNum: %d\n", ThisFATSecNum);
 476              		.loc 1 214 0
 477 0300 0000043C 		lui	$4,%hi($LC31)
 478 0304 21280002 		move	$5,$16
 479 0308 0000000C 		jal	printf
 480 030c 00008424 		addiu	$4,$4,%lo($LC31)
 481              	
 215:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("ThisFATEntOffset: %d\n", ThisFATEntOffset); 
 482              		.loc 1 215 0
 483 0310 0000043C 		lui	$4,%hi($LC32)
GAS LISTING /tmp/ccZKkRKo.s 			page 15


 484 0314 21282002 		move	$5,$17
 485 0318 0000000C 		jal	printf
 486 031c 00008424 		addiu	$4,$4,%lo($LC32)
 487              	
 216:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	printf("-------------------------------\n");
 488              		.loc 1 216 0
 489 0320 0000043C 		lui	$4,%hi($LC23)
 490 0324 0000000C 		jal	printf
 491 0328 00008424 		addiu	$4,$4,%lo($LC23)
 492              	
 493 032c 1C20BF8F 		lw	$31,8220($sp)
 494 0330 1820B28F 		lw	$18,8216($sp)
 495 0334 1420B18F 		lw	$17,8212($sp)
 496 0338 1020B08F 		lw	$16,8208($sp)
 497 033c 0800E003 		j	$31
 498 0340 2020BD27 		addiu	$sp,$sp,8224
 499              	
 500              		.set	macro
 501              		.set	reorder
 502              	$LFE3:
 503              		.end	displayDirectoryEntry
 504              		.align	2
 505              		.globl	getSectorNumber
 506              		.ent	getSectorNumber
 507              		.type	getSectorNumber, @function
 508              	getSectorNumber:
 509              	$LFB4:
 217:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** }
 218:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 
 219:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** int getSectorNumber(int clusterOffset)
 220:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** {
 510              		.loc 1 220 0
 511              		.frame	$sp,0,$31		# vars= 0, regs= 0/0, args= 0, gp= 0
 512              		.mask	0x00000000,0
 513              		.fmask	0x00000000,0
 514              		.set	noreorder
 515              		.set	nomacro
 516              		
 221:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** 	return fat.rootSector + (clusterOffset - 2) * fat.fbs.BPB_SecPerClus + fat.firstDataSector;
 517              		.loc 1 221 0
 518 0344 0000033C 		lui	$3,%hi(fat)
 519 0348 00006324 		addiu	$3,$3,%lo(fat)
 520 034c 0D006690 		lbu	$6,13($3)
 521 0350 FEFF8424 		addiu	$4,$4,-2
 522 0354 3C02658C 		lw	$5,572($3)
 523 0358 1802628C 		lw	$2,536($3)
 524 035c 02188670 		mul	$3,$4,$6
 525 0360 21206500 		addu	$4,$3,$5
 222:/mnt/hgfs/boot/booter/source/applications/booter/fat.c **** }
 526              		.loc 1 222 0
 527 0364 0800E003 		j	$31
 528 0368 21108200 		addu	$2,$4,$2
 529              	
 530              		.set	macro
 531              		.set	reorder
 532              	$LFE4:
 533              		.end	getSectorNumber
GAS LISTING /tmp/ccZKkRKo.s 			page 16


 534              		.align	2
 535              		.globl	getNextCluster
 536              		.ent	getNextCluster