copy.yo

深入理解计算机系统 的lab

  0x000:              | 	.pos 0
  0x000: 308400010000 | init:	irmovl Stack, %esp
  0x006: 308500010000 | 	irmovl Stack, %ebp
  0x00c: 7029000000   | 	jmp Main
                      | 
                      | # Source block
  0x011:              | src:
  0x011: 0a000000     |         .long 0x00a
  0x015: b0000000     |         .long 0x0b0
  0x019: 000c0000     |         .long 0xc00
                      | # Destination block
  0x01d:              | dest:
  0x01d: 11010000     |         .long 0x111
  0x021: 22020000     |         .long 0x222
  0x025: 33030000     |         .long 0x333
                      | 
  0x029: 308003000000 | Main:	irmovl $3, %eax
  0x02f: a008         | 	pushl %eax
  0x031: 30821d000000 | 	irmovl dest, %edx
  0x037: a028         | 	pushl %edx
  0x039: 308611000000 | 	irmovl src, %esi
  0x03f: a068         | 	pushl %esi
  0x041: 8047000000   | 	call copy_block
  0x046: 10           | 	halt
                      | 
  0x047:              | copy_block:
  0x047: a058         | 	pushl %ebp
  0x049: 2045         | 	rrmovl %esp, %ebp
  0x04b: 501510000000 | 	mrmovl 16(%ebp), %ecx	#len
  0x051: 50250c000000 | 	mrmovl 12(%ebp), %edx	#dst
  0x057: 503508000000 | 	mrmovl 8(%ebp), %ebx	#src
  0x05d: 6300         | 	xorl %eax, %eax		#result
  0x05f: 6366         | 	xorl %esi, %esi		#val
  0x061:              | Loop:
  0x061: 6211         | 	andl %ecx, %ecx
  0x063: 718d000000   | 	jle DONE
  0x068: 506300000000 | 	mrmovl (%ebx), %esi
  0x06e: 308704000000 | 	irmovl $4, %edi	
  0x074: 6073         | 	addl %edi, %ebx		#*src++
  0x076: 406200000000 | 	rmmovl %esi, (%edx)
  0x07c: 6072         | 	addl %edi, %edx
  0x07e: 6360         | 	xorl %esi, %eax 
  0x080: 308701000000 | 	irmovl $1, %edi
  0x086: 6171         | 	subl %edi, %ecx
  0x088: 7061000000   | 	jmp Loop
  0x08d:              | DONE:
  0x08d: 2054         | 	rrmovl %ebp, %esp
  0x08f: b058         | 	popl %ebp
  0x091: 90           | 	ret
                      | 
  0x100:              | 	.pos 0x100
  0x100:              | Stack:
                      |