disassemble.s

一个基于MMU的操作系统的实现(代码很少

uart:     file format binary

Disassembly of section .data:

00000000 <.data>:
   0:	e59d0000 	ldr	r0, [sp]
   4:	e28d1004 	add	r1, sp, #4	; 0x4
   8:	eb000038 	bl	0xf0
   c:	eb000000 	bl	0x14
  10:	eafffffe 	b	0x10
  14:	e1a0c00d 	mov	ip, sp
  18:	e92dd800 	stmdb	sp!, {fp, ip, lr, pc}
  1c:	e24cb004 	sub	fp, ip, #4	; 0x4
  20:	e24dd008 	sub	sp, sp, #8	; 0x8
  24:	e50b0010 	str	r0, [fp, #-16]
  28:	e51b3010 	ldr	r3, [fp, #-16]
  2c:	e1a00003 	mov	r0, r3
  30:	ef000000 	swi	0x00000000
  34:	e1a03000 	mov	r3, r0
  38:	e50b3014 	str	r3, [fp, #-20]
  3c:	e51b3014 	ldr	r3, [fp, #-20]
  40:	e1a00003 	mov	r0, r3
  44:	e24bd00c 	sub	sp, fp, #12	; 0xc
  48:	e89da800 	ldmia	sp, {fp, sp, pc}
  4c:	e1a0c00d 	mov	ip, sp
  50:	e92dd800 	stmdb	sp!, {fp, ip, lr, pc}
  54:	e24cb004 	sub	fp, ip, #4	; 0x4
  58:	e24dd008 	sub	sp, sp, #8	; 0x8
  5c:	e50b0010 	str	r0, [fp, #-16]
  60:	e51b3010 	ldr	r3, [fp, #-16]
  64:	e1a00003 	mov	r0, r3
  68:	ef000001 	swi	0x00000001
  6c:	e1a03000 	mov	r3, r0
  70:	e50b3014 	str	r3, [fp, #-20]
  74:	e51b3014 	ldr	r3, [fp, #-20]
  78:	e1a00003 	mov	r0, r3
  7c:	e24bd00c 	sub	sp, fp, #12	; 0xc
  80:	e89da800 	ldmia	sp, {fp, sp, pc}
  84:	e1a0c00d 	mov	ip, sp
  88:	e92dd800 	stmdb	sp!, {fp, ip, lr, pc}
  8c:	e24cb004 	sub	fp, ip, #4	; 0x4
  90:	e24dd008 	sub	sp, sp, #8	; 0x8
  94:	e50b0010 	str	r0, [fp, #-16]
  98:	e51b3010 	ldr	r3, [fp, #-16]
  9c:	e1a00003 	mov	r0, r3
  a0:	ef000002 	swi	0x00000002
  a4:	e1a03000 	mov	r3, r0
  a8:	e50b3014 	str	r3, [fp, #-20]
  ac:	e51b3014 	ldr	r3, [fp, #-20]
  b0:	e1a00003 	mov	r0, r3
  b4:	e24bd00c 	sub	sp, fp, #12	; 0xc
  b8:	e89da800 	ldmia	sp, {fp, sp, pc}
  bc:	e1a0c00d 	mov	ip, sp
  c0:	e92dd800 	stmdb	sp!, {fp, ip, lr, pc}
  c4:	e24cb004 	sub	fp, ip, #4	; 0x4
  c8:	e24dd004 	sub	sp, sp, #4	; 0x4
  cc:	e50b0010 	str	r0, [fp, #-16]
  d0:	e51b3010 	ldr	r3, [fp, #-16]
  d4:	e3530000 	cmp	r3, #0	; 0x0
  d8:	0a000003 	beq	0xec
  dc:	e51b3010 	ldr	r3, [fp, #-16]
  e0:	e2433001 	sub	r3, r3, #1	; 0x1
  e4:	e50b3010 	str	r3, [fp, #-16]
  e8:	eafffff8 	b	0xd0
  ec:	e89da808 	ldmia	sp, {r3, fp, sp, pc}
  f0:	e1a0c00d 	mov	ip, sp
  f4:	e92dd800 	stmdb	sp!, {fp, ip, lr, pc}
  f8:	e24cb004 	sub	fp, ip, #4	; 0x4
  fc:	e24dd010 	sub	sp, sp, #16	; 0x10
 100:	e50b0010 	str	r0, [fp, #-16]
 104:	e50b1014 	str	r1, [fp, #-20]
 108:	e51b3010 	ldr	r3, [fp, #-16]
 10c:	e3530001 	cmp	r3, #1	; 0x1
 110:	da000006 	ble	0x130
 114:	e3a02004 	mov	r2, #4	; 0x4
 118:	e51b3014 	ldr	r3, [fp, #-20]
 11c:	e0823003 	add	r3, r2, r3
 120:	e5933000 	ldr	r3, [r3]
 124:	e5d33000 	ldrb	r3, [r3]
 128:	e54b3018 	strb	r3, [fp, #-24]
 12c:	ea000001 	b	0x138
 130:	e3a0304e 	mov	r3, #78	; 0x4e
 134:	e54b3018 	strb	r3, [fp, #-24]
 138:	e3a0300a 	mov	r3, #10	; 0xa
 13c:	e54b3017 	strb	r3, [fp, #-23]
 140:	e3a0300d 	mov	r3, #13	; 0xd
 144:	e54b3016 	strb	r3, [fp, #-22]
 148:	e3a03000 	mov	r3, #0	; 0x0
 14c:	e54b3015 	strb	r3, [fp, #-21]
 150:	e24b3018 	sub	r3, fp, #24	; 0x18
 154:	e1a00003 	mov	r0, r3
 158:	ebffffc9 	bl	0x84
 15c:	e3a00064 	mov	r0, #100	; 0x64
 160:	ebffffb9 	bl	0x4c
 164:	eafffff9 	b	0x150