mem_mgr.lst

au1200下的boot代码

 115:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	MemSet( mem, 0, list->size );
 198              		.loc 1 115 0
 199 00f4 00008680 		lb	$6,0($4)
 200 00f8 22000008 		j	MemSet
 201 00fc 21280000 		move	$5,$0
 202              	
 203              		.set	macro
 204              		.set	reorder
 205              	$LFE5:
 206              		.end	destroy
 207              		.align	2
 208              		.ent	alloc
 209              		.type	alloc, @function
 210              	alloc:
 211              	$LFB6:
 116:/mnt/hgfs/boot/booter/source/mem_mgr.c **** }
 117:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
GAS LISTING /tmp/cc4WPeaK.s 			page 7


 118:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 119:/mnt/hgfs/boot/booter/source/mem_mgr.c **** static void * alloc( void * pool, unsigned long _size, void * context )
 120:/mnt/hgfs/boot/booter/source/mem_mgr.c **** {
 212              		.loc 1 120 0
 213              		.frame	$sp,24,$31		# vars= 0, regs= 2/0, args= 16, gp= 0
 214              		.mask	0x80010000,-4
 215              		.fmask	0x00000000,0
 216              		.set	noreorder
 217              		.set	nomacro
 218              		
 219 0100 E8FFBD27 		addiu	$sp,$sp,-24
 220              	$LCFI5:
 121:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	PBUFFER pcurrent=(PBUFFER)pool;
 122:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	PBUFFER new;
 123:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	unsigned long size;
 124:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	void 	*ptr;
 125:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 126:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	/* Round requested size 32bit boundry */
 127:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	if (_size & 0x03) size = (_size & ~0x3) + 0x4;
 221              		.loc 1 127 0
 222 0104 0300A230 		andi	$2,$5,0x3
 223              		.loc 1 120 0
 224 0108 1000B0AF 		sw	$16,16($sp)
 225              	$LCFI6:
 226 010c 2138C000 		move	$7,$6
 227 0110 1400BFAF 		sw	$31,20($sp)
 228              	$LCFI7:
 229              		.loc 1 121 0
 230 0114 21808000 		move	$16,$4
 128:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	else size=_size;
 231              		.loc 1 128 0
 232              		.loc 1 127 0
 233 0118 04004010 		beq	$2,$0,$L21
 234 011c 2130A000 		move	$6,$5
 235              	
 236 0120 FCFF0224 		li	$2,-4			# 0xfffffffffffffffc
 237 0124 2410A200 		and	$2,$5,$2
 238 0128 04004624 		addiu	$6,$2,4
 239              	$L21:
 129:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 130:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	do
 131:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	{
 132:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		if (!pcurrent) return NULL;
 240              		.loc 1 132 0
 241 012c 0B000012 		beq	$16,$0,$L27
 242 0130 1400C424 		addiu	$4,$6,20
 243              	
 244              	$L28:
 133:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 134:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		if( (!pcurrent->inuse) && (pcurrent->size >= size + sizeof(BUFFER)) ) break;
 245              		.loc 1 134 0
 246 0134 0400028E 		lw	$2,4($16)
 247 0138 05004014 		bne	$2,$0,$L25
 248 013c 00000000 		nop
 249              	
 250 0140 0000038E 		lw	$3,0($16)
 251 0144 2B106400 		sltu	$2,$3,$4
GAS LISTING /tmp/cc4WPeaK.s 			page 8


 252 0148 09004010 		beq	$2,$0,$L23
 253 014c 00000000 		nop
 254              	
 255              	$L25:
 135:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 136:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		/* Goto next node in list */
 137:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pcurrent = pcurrent->next;
 256              		.loc 1 137 0
 257 0150 0800108E 		lw	$16,8($16)
 258              		.loc 1 132 0
 259 0154 F7FF0016 		bne	$16,$0,$L28
 260 0158 00000000 		nop
 261              	
 262              	$L27:
 138:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	} while(1);	
 139:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 140:/mnt/hgfs/boot/booter/source/mem_mgr.c **** #ifdef DEBUG
 141:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		dump(pool);
 142:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		printf("\nalloc: pcurrent:%X req_size:%d new_size:%d\n", pcurrent,_size,size);
 143:/mnt/hgfs/boot/booter/source/mem_mgr.c **** #endif
 144:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	/* 	If we get to this point -- pcurrent is a valid descriptor
 145:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	 *  First thing we need to do is create a new descriptor for the left over data
 146:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	 *	and fill in the proper values. Only do this if we have left overs
 147:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	 */
 148:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	if ( pcurrent->size != size )
 149:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	{
 150:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		new 				= (PBUFFER)((unsigned long)pcurrent + size + sizeof(BUFFER));
 151:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		new->size			= pcurrent->size - size - sizeof(BUFFER);
 152:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		new->inuse			= 0;
 153:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		new->prev			= pcurrent;
 154:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		new->next			= pcurrent->next;
 155:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 156:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pcurrent->next 		= new;
 157:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pcurrent->size  	= size;
 158:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pcurrent->context 	= context;
 159:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pcurrent->inuse 	= 1;
 160:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 161:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	}
 162:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 163:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	// Prepare to zero-out the newly allocated memory
 164:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	ptr = (void*)( (uint32)pcurrent + sizeof(BUFFER));
 165:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	MemSet( ptr, 0, size );
 166:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 167:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	/* return a pointer to the actual data area */
 168:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	return ptr;
 169:/mnt/hgfs/boot/booter/source/mem_mgr.c **** }
 263              		.loc 1 169 0
 264 015c 1400BF8F 		lw	$31,20($sp)
 265 0160 1000B08F 		lw	$16,16($sp)
 266              		.loc 1 132 0
 267 0164 21100000 		move	$2,$0
 268              		.loc 1 169 0
 269 0168 0800E003 		j	$31
 270 016c 1800BD27 		addiu	$sp,$sp,24
 271              	
 272              	$L23:
 273              		.loc 1 151 0
GAS LISTING /tmp/cc4WPeaK.s 			page 9


 274              		.loc 1 148 0
 275 0170 0E006610 		beq	$3,$6,$L26
 276 0174 23106600 		subu	$2,$3,$6
 277              	
 278              		.loc 1 154 0
 279 0178 0800058E 		lw	$5,8($16)
 280              		.loc 1 150 0
 281 017c 21200602 		addu	$4,$16,$6
 282              		.loc 1 151 0
 283 0180 ECFF4224 		addiu	$2,$2,-20
 284              		.loc 1 150 0
 285 0184 14008324 		addiu	$3,$4,20
 286              		.loc 1 151 0
 287 0188 140082AC 		sw	$2,20($4)
 288              		.loc 1 159 0
 289 018c 01000224 		li	$2,1			# 0x1
 290              		.loc 1 154 0
 291 0190 080065AC 		sw	$5,8($3)
 292              		.loc 1 152 0
 293 0194 040060AC 		sw	$0,4($3)
 294              		.loc 1 158 0
 295 0198 100007AE 		sw	$7,16($16)
 296              		.loc 1 156 0
 297 019c 080003AE 		sw	$3,8($16)
 298              		.loc 1 159 0
 299 01a0 040002AE 		sw	$2,4($16)
 300              		.loc 1 153 0
 301 01a4 0C0070AC 		sw	$16,12($3)
 302              		.loc 1 157 0
 303 01a8 000006AE 		sw	$6,0($16)
 304              	$L26:
 305              		.loc 1 164 0
 306 01ac 14001026 		addiu	$16,$16,20
 307              		.loc 1 165 0
 308 01b0 00360600 		sll	$6,$6,24
 309 01b4 21200002 		move	$4,$16
 310 01b8 03360600 		sra	$6,$6,24
 311 01bc 2200000C 		jal	MemSet
 312 01c0 21280000 		move	$5,$0
 313              	
 314              		.loc 1 168 0
 315 01c4 21100002 		move	$2,$16
 316              		.loc 1 169 0
 317 01c8 1400BF8F 		lw	$31,20($sp)
 318 01cc 1000B08F 		lw	$16,16($sp)
 319 01d0 0800E003 		j	$31
 320 01d4 1800BD27 		addiu	$sp,$sp,24
 321              	
 322              		.set	macro
 323              		.set	reorder
 324              	$LFE6:
 325              		.end	alloc
 326              		.align	2
 327              		.ent	free
 328              		.type	free, @function
 329              	free:
 330              	$LFB7:
GAS LISTING /tmp/cc4WPeaK.s 			page 10


 170:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 171:/mnt/hgfs/boot/booter/source/mem_mgr.c **** static void free ( void * buffer )
 172:/mnt/hgfs/boot/booter/source/mem_mgr.c **** {
 331              		.loc 1 172 0
 332              		.frame	$sp,0,$31		# vars= 0, regs= 0/0, args= 0, gp= 0
 333              		.mask	0x00000000,0
 334              		.fmask	0x00000000,0
 335              		.set	noreorder
 336              		.set	nomacro
 337              		
 173:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	// We pass the actual data buffer to the user -- now we must compensate
 174:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	// for the header being sizeof(BUFFER) ahead of the user's pointer
 175:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	//
 176:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	PBUFFER pbuf  = (PBUFFER)((uint32)buffer - sizeof(BUFFER));
 338              		.loc 1 176 0
 339 01d8 ECFF8524 		addiu	$5,$4,-20
 177:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	PBUFFER	pprev;
 178:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	PBUFFER pnext;
 179:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 180:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	pprev = pbuf->prev;
 340              		.loc 1 180 0
 341 01dc 0C00A68C 		lw	$6,12($5)
 342              		.loc 1 172 0
 343 01e0 21408000 		move	$8,$4
 181:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	pnext = pbuf->next;
 344              		.loc 1 181 0
 182:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 
 183:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	/*
 184:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	 *	We have to merge the nodes when they are freed
 185:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	 *  There are four cases :
 186:/mnt/hgfs/boot/booter/source/mem_mgr.c ****      *    1) Prev and Next nodes are also free
 187:/mnt/hgfs/boot/booter/source/mem_mgr.c ****      *	  2) Prev node is free
 188:/mnt/hgfs/boot/booter/source/mem_mgr.c ****      *    3) Next node is free
 189:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	 *    4) No neighbors are free
 190:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	 */
 191:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	if ( pprev && (!pprev->inuse) && pnext && !(pnext->inuse) )
 345              		.loc 1 191 0
 346 01e4 2200C010 		beq	$6,$0,$L32
 347 01e8 0800A78C 		lw	$7,8($5)
 348              	
 349 01ec 0400C38C 		lw	$3,4($6)
 350 01f0 0E006010 		beq	$3,$0,$L37
 351 01f4 00000000 		nop
 352              	
 353              	$L30:
 192:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	{
 193:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pprev->size += pnext->size + pbuf->size + (sizeof(BUFFER)*2);
 194:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pprev->next = pnext->next;
 195:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		((PBUFFER)(pnext->next))->prev = pprev;
 196:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	}
 197:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	else if ( pprev && (!pprev->inuse) )
 354              		.loc 1 197 0
 355 01f8 1D00C010 		beq	$6,$0,$L32
 356 01fc 00000000 		nop
 357              	
 358 0200 1B006014 		bne	$3,$0,$L32
 359 0204 00000000 		nop
GAS LISTING /tmp/cc4WPeaK.s 			page 11


 360              	
 198:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	{
 199:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pprev->size += pbuf->size + sizeof(BUFFER);
 361              		.loc 1 199 0
 362 0208 0000C28C 		lw	$2,0($6)
 363 020c 0000A38C 		lw	$3,0($5)
 200:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pprev->next = pbuf->next;
 364              		.loc 1 200 0
 365 0210 0800C7AC 		sw	$7,8($6)
 201:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		((PBUFFER)pbuf->next)->prev = pprev;
 366              		.loc 1 201 0
 367 0214 0800A48C 		lw	$4,8($5)
 368              		.loc 1 199 0
 369 0218 21104300 		addu	$2,$2,$3
 370 021c 14004224 		addiu	$2,$2,20
 371              		.loc 1 201 0
 372 0220 0C0086AC 		sw	$6,12($4)
 373              		.loc 1 199 0
 374              		.loc 1 201 0
 375 0224 0800E003 		j	$31
 376 0228 0000C2AC 		sw	$2,0($6)
 377              	
 378              	$L37:
 379              		.loc 1 191 0
 380 022c F2FFE010 		beq	$7,$0,$L30
 381 0230 00000000 		nop
 382              	
 383 0234 0400E28C 		lw	$2,4($7)
 384 0238 EFFF4014 		bne	$2,$0,$L30
 385 023c 00000000 		nop
 386              	
 387              		.loc 1 194 0
 388 0240 0800E48C 		lw	$4,8($7)
 389              		.loc 1 193 0
 390 0244 ECFF058D 		lw	$5,-20($8)
 391 0248 0000E38C 		lw	$3,0($7)
 392 024c 0000C28C 		lw	$2,0($6)
 393              		.loc 1 194 0
 394 0250 0800C4AC 		sw	$4,8($6)
 395              		.loc 1 193 0
 396 0254 21186500 		addu	$3,$3,$5
 397              		.loc 1 195 0
 398 0258 0800E48C 		lw	$4,8($7)
 399              		.loc 1 193 0
 400 025c 21104300 		addu	$2,$2,$3
 401 0260 28004224 		addiu	$2,$2,40
 402              		.loc 1 201 0
 403 0264 0C0086AC 		sw	$6,12($4)
 404              		.loc 1 199 0
 405              		.loc 1 201 0
 406 0268 0800E003 		j	$31
 407 026c 0000C2AC 		sw	$2,0($6)
 408              	
 409              	$L32:
 202:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	}
 203:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	else if ( pnext && (!pnext->inuse) )
 410              		.loc 1 203 0
GAS LISTING /tmp/cc4WPeaK.s 			page 12


 411 0270 0D00E010 		beq	$7,$0,$L34
 412 0274 00000000 		nop
 413              	
 414 0278 0400E28C 		lw	$2,4($7)
 415 027c 0A004014 		bne	$2,$0,$L34
 416 0280 00000000 		nop
 417              	
 204:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 	{
 205:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pbuf->size += pnext->size + sizeof(BUFFER);
 418              		.loc 1 205 0
 419 0284 0000A28C 		lw	$2,0($5)
 420 0288 0000E38C 		lw	$3,0($7)
 206:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pbuf->next = pnext->next;
 421              		.loc 1 206 0
 422 028c 0800E48C 		lw	$4,8($7)
 207:/mnt/hgfs/boot/booter/source/mem_mgr.c **** 		pbuf->inuse = 0;
 423              		.loc 1 207 0
 424 0290 0400A0AC 		sw	$0,4($5)
 425              		.loc 1 205 0
 426 0294 21104300 		addu	$2,$2,$3
 427 0298 14004224 		addiu	$2,$2,20
 428 029c 0000A2AC 		sw	$2,0($5)
 429              		.loc 1 206 0