hex的反匯編文件譯碼及說明（獲得函數地址）

hex反匯編軟件 ：下載地址（右鍵選擇下載工具下載，比如迅雷下載）

以下是我做的一個實驗，產生的《實驗.hex》文件通過反匯編，之后得到的代碼，其此函數的功能也就是獲得每一個自定義的函數在flash里的地址，通過反匯編更能了解其數值返回過程，解讀。

通過此上的反匯編實驗，可以用來做基于avr的多任務機制點擊銜接。

如下

; reassembly of "實驗.hex"
; created by ReAVR V3.2.0
; at 2010/01/31 - 19:38:25
; for ICCAVR assembler
;---------------------------------------
; AVR_TYPE=
; FLASH_SIZE=8KB
; SRAM_START=0x60
;---------------------------------------
.area text
;; older iccavr need different setup:
;; .area text (abs,ovr)
;; .org 0x0000
;---------------------------------------
; byte constants:
;
k00 = 0x00 ;
k01 = 0x01 ;
k02 = 0x02 ;
k03 = 0x03 ;
k04 = 0x04 ;
k05 = 0x05 ;
k08 = 0x08 ;
k10 = 0x10 ;
k40 = 0x40 ;@
k5F = 0x5F ; _
k60 = 0x60 ; `
k69 = 0x69 ; i
kAA = 0xAA ; ?
kFF = 0xFF ;
;
; io register addresses://Data Address Space
;
p11 = 0x11
p12 = 0x12
p14 = 0x14
p15 = 0x15
p17 = 0x17
p18 = 0x18
p1A = 0x1A
p1B = 0x1B
p34 = 0x34
p35 = 0x35
p3B = 0x3B
p3D = 0x3D
p3E = 0x3E
p3F = 0x3F
;
; bit numbers:
;
b0 = 0x00
b1 = 0x01
b2 = 0x02
b3 = 0x03
b4 = 0x04
b5 = 0x05
b6 = 0x06
b7 = 0x07
;---------------------------------------
;
L0000:
jmp __start ; L0030
; ----------- jump on last line
jmp L006E
; ----------- jump on last line
.word 0xFFFF ; pc=0x0004(0x0008)
.word 0xFFFF ; pc=0x0005(0x000A)
.word 0xFFFF ; pc=0x0006(0x000C)
.word 0xFFFF ; pc=0x0007(0x000E)
.word 0xFFFF ; pc=0x0008(0x0010)
.word 0xFFFF ; pc=0x0009(0x0012)
.word 0xFFFF ; pc=0x000A(0x0014)
.word 0xFFFF ; pc=0x000B(0x0016)
.word 0xFFFF ; pc=0x000C(0x0018)
.word 0xFFFF ; pc=0x000D(0x001A)
.word 0xFFFF ; pc=0x000E(0x001C)
.word 0xFFFF ; pc=0x000F(0x001E)
.word 0xFFFF ; pc=0x0010(0x0020)
.word 0xFFFF ; pc=0x0011(0x0022)
.word 0xFFFF ; pc=0x0012(0x0024)
.word 0xFFFF ; pc=0x0013(0x0026)
.word 0xFFFF ; pc=0x0014(0x0028)
.word 0xFFFF ; pc=0x0015(0x002A)
.word 0xFFFF ; pc=0x0016(0x002C)
.word 0xFFFF ; pc=0x0017(0x002E)
.word 0xFFFF ; pc=0x0018(0x0030)
.word 0xFFFF ; pc=0x0019(0x0032)
.word 0xFFFF ; pc=0x001A(0x0034)
.word 0xFFFF ; pc=0x001B(0x0036)
.word 0xFFFF ; pc=0x001C(0x0038)
.word 0xFFFF ; pc=0x001D(0x003A)
.word 0xFFFF ; pc=0x001E(0x003C)
.word 0xFFFF ; pc=0x001F(0x003E)
.word 0xFFFF ; pc=0x0020(0x0040)
.word 0xFFFF ; pc=0x0021(0x0042)
.word 0xFFFF ; pc=0x0022(0x0044)
.word 0xFFFF ; pc=0x0023(0x0046)
.word 0xFFFF ; pc=0x0024(0x0048)
.word 0xFFFF ; pc=0x0025(0x004A)
.word 0xFFFF ; pc=0x0026(0x004C)
.word 0xFFFF ; pc=0x0027(0x004E)
.word 0xFFFF ; pc=0x0028(0x0050)
.word 0xFFFF ; pc=0x0029(0x0052)
.word 0xFFFF ; pc=0x002A(0x0054)
.word 0xFFFF ; pc=0x002B(0x0056)
.word 0xFFFF ; pc=0x002C(0x0058)
.word 0xFFFF ; pc=0x002D(0x005A)
.word 0xFFFF ; pc=0x002E(0x005C)
.word 0xFFFF ; pc=0x002F(0x005E)
;
__start:://*頭文件加載 I/O Registers 0020-005f*/
; L0030:
ldi r28,k5F; LDI Rd, K 加載立即數
ldi r29,k04
out p3D,r28; OUT P, Rr 將數據輸出到端口
out p3E,r29
subi r28,k10;SUBI Rd, K 立即數與寄存器相減
sbci r29,k00;SBCI Rd, K 寄存器與常數及進位位相減
ldi r16,kAA
std Y+o00,r16;STD Z+q,Rr 帶偏移量的間接存儲
clr r0
ldi r30,k60
ldi r31,k00
ldi r17,k00
L003C:
cpi r30,k69;CPI Rd,K 比較寄存器與立即數
cpc r31,r17;CPC Rd,Rr 帶進位位比較
breq L0041;BREQ k 相等即跳轉
; ----- branch on last line
st Z+,r0;ST Z+, Rr 間接存儲并執(zhí)行后加操作
rjmp L003C
; ----------- jump on last line
L0041:
st Z,r16;ST Z, Rr 間接存儲
ldi r30,k60
ldi r31,k00
ldi r26,k60
ldi r27,k00
ldi r17,k00
L0047:
cpi r30,k60
cpc r31,r17
breq L004E
; ----- branch on last line
lpm
adiw r30,k01
st X+,r0
rjmp L0047
; ----------- jump on last line
L004E:
call L00C2
L0050:
rjmp L0050
; ----------- jump on last line

; pc=0x51(0xA2) yanshi_0(void)
;
L0051:
rjmp L0054
; ----------- jump on last line
L0052:
ldi r24,k01
out p18,r24
L0054:
rjmp L0052
; ----------- jump on last line
ret
;----------------------*
; pc=0x56(0xAC) yanshi_1(void)
;
L0056:
rjmp L0059
; ----------- jump on last line
L0057:
ldi r24,k02
out p18,r24
L0059:
rjmp L0057
; ----------- jump on last line
ret
;----------------------*
; pc=0x5B(0xB6) yanshi_2(void)
;
L005B:
rjmp L005E
; ----------- jump on last line
L005C:
ldi r24,k04
out p18,r24
L005E:
rjmp L005C
; ----------- jump on last line
ret
;----------------------*
; pc=0x60(0xC0) void yanshi_3(void)
;
L0060:;第一個函數
rjmp L0063
; ----------- jump on last line
L0061:
ldi r24,k08
out p18,r24
L0063:
rjmp L0061
; ----------- jump on last line
ret
;----------------------*
; pc=0x65(0xCA) void int_init(void)
;
L0065:
in r24,p35
ori r24,k02
out p35,r24
in r2,p34
out p34,r2
in r24,p3B
ori r24,k40
out p3B,r24
ret
;----------------------*
; pc=0x6E(0xDC)
/*************************** 中斷函數**************************/
;
L006E:
st -Y,r2;ST - Y, Rr 間接存儲并執(zhí)行預減操作
st -Y,r3
st -Y,r24
st -Y,r25
in r2,p3F;IN Rd, P 讀入端口數據
st -Y,r2

/* if(k==0)
{SP=sp_1-2;}
*/
lds r2,D0060;LDS Rd, k 從 SRAM 中直接加載
tst r2; TST Rd 測試為 0 或負
brne L0081;BRNE k 不相等即跳轉
; ----- branch on last line
lds r2,D0067
lds r3,D0068
sts (p3E+0x20),r3 ; io register
sts (p3D+0x20),r2 ; io register
rjmp L00A7
; ----------- jump on last line
L0081:/*
if(k==1)
{SP=sp_2-2;}*/
lds r24,D0060
cpi r24,k01
brne L008E
; ----- branch on last line
lds r2,D0065
lds r3,D0066
sts (p3E+0x20),r3 ; io register
sts (p3D+0x20),r2 ; io register
rjmp L00A7
; ----------- jump on last line
L008E:/*
if(k==2)
{SP=sp_3-2;}*/
lds r24,D0060
cpi r24,k02
brne L009B
; ----- branch on last line
lds r2,D0063
lds r3,D0064
sts (p3E+0x20),r3 ; io register
sts (p3D+0x20),r2 ; io register
rjmp L00A7
; ----------- jump on last line
L009B:
/*
if(k==3)
{SP=sp_4-2;}
*/
lds r24,D0060
cpi r24,k03
brne L00A7
; ----- branch on last line
lds r2,D0061
lds r3,D0062
sts (p3E+0x20),r3 ; io register
sts (p3D+0x20),r2 ; io register
L00A7:
/*k++;
if(k==4)
k=0;
*/
lds r24,D0060
subi r24,kFF
sts D0060,r24
cpi r24,k04
brne L00B1
; ----- branch on last line
clr r2
sts D0060,r2
L00B1:
ld r2,Y+
out p3F,r2
ld r25,Y+
ld r24,Y+
ld r3,Y+
ld r2,Y+
reti
/*******中斷結束************************/
;----------------------*
; pc=0xB8(0x170)
;延時函數
ldi r16,k05
ldi r17,k00
L00BA:
movw r2,r16
subi r16,k01
sbci r17,k00
tst r2
brne L00BA
; ----- branch on last line
tst r3
brne L00BA
; ----- branch on last line
ret
;----------------------*
; pc=0xC2(0x184)
;;主函數部分
/**io端口初始化*/
L00C2:
ldi r24,kFF
out p1B,r24
out p1A,r24
out p18,r24
out p17,r24
out p15,r24
clr r2
out p14,r2
out p12,r24
out p11,r2
rcall L0065
rjmp L00EA
; ----------- jump on last line
L00CE:;while循環(huán)部分
in r2,p3D
in r3,p3E
sts D0068,r3; STS k, Rr 直接存儲到 SRAM
sts D0067,r2
rcall L0051
in r2,p3D
in r3,p3E
sts D0066,r3
sts D0065,r2
rcall L0056
in r2,p3D
in r3,p3E
sts D0064,r3
sts D0063,r2
rcall L005B
in r2,p3D
in r3,p3E
sts D0062,r3
sts D0061,r2
rcall L0060
L00EA:
rjmp L00CE
; ----------- jump on last line
ret
;----------------------*
; pc=0xEC(0x1D8)
;
__text_end::
;
; last flash byte address = 0x01D7
; last flash word address = 0x00EB
;---------------------------------------
.area bss (abs)
.org 0x0060
;;Internal SRAM 內置的靜態(tài)隨機存儲器D0060-D045F
__first_bss::
;
D0060:
.blkb 1
D0061:
.blkb 1
D0062:
.blkb 1
D0063:
.blkb 1
D0064:
.blkb 1
D0065:
.blkb 1
D0066:
.blkb 1
D0067:
.blkb 1
D0068:
;
__last_bss::
;
; last lds/sts data byte at 0x0068
;---------------------------------------
;