??? ??ARM? ???????

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? ?
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??? ??ARM? ???????

• 1. ??ARM????????????
• 2. ADS1.2??????
• 3. ARM?????

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2.1 ??ARM????????????
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?????????
????
???? .s
???
C?? .c
??
?????? .ld
?????? .map
??
?????? .cs
??
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?????????

• ???????
• ?????????????
• ????Debug?????
• ADS CodeWarrior IDE?????????????
• ?AXD???????????Debug?

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2.2 ADS 1.2 ??????

• CodeWarrior IDE
• AXD Debuger

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CodeWarrior IDE ??

• 1 ?????(Project)
• 2 ?????????
• 3 ?????????
• 4 ?????
• 5 Debug?????????

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1. ?????(Project)
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1.2 ?????????
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3 ?????????
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4 ?????

• ?? Project -gtMake????,??????
• ??????????touch?????,??ELF????
• ????????,????ELF image??
• ??postlink??,??ELF ?????fromELF???????????

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5 Debug?????????

• ?????,IDE???AXD????Make???ELF image????debug???Pro
  ject -gtDebug

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6 ????Building??

• 1. ??????????

Compiler name Compiler variant Source language Compiler output
armcc C C 32-bit ARM code
tcc C C 16-bit Thumb code
armcpp C C or C 32-bit ARM code
tcpp C C or C 16-bit Thumb code
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• 1). ??C?? main.c
• armcc -g -O1 -c main.c (for ARM)
• tcc -g -O1 -c main.c (for Thumb)
• ??
• -g compiler??debug tables.
• -O1 compiler ?????????????????????
• -c compiler ?????
• 2). ??????
• armlink main.o -o embed.axf
• ??
• -o ????????? embed.axf.
• 3). ? armsd or AXD ??????????

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6 ????Building??

• 2. ?????????
• armasm -list addreg.lst addreg.s
• armlink addreg.o -o addreg
• ?Debugger?????
• armsd addreg
• step

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2. AXD Debuger???

• ????
• ????
• ?????
• ??????
• ?????
• ??????

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DEMO ??????

• ???Benchmark ??, ???????????????????
• ?Dhrystone??????,??????
• Dhrystones/?????? ????)/????
• ?Demo?,??????????2???

• MIPS?
• ?????????????????????VAX 11/780 ???????,????1
  MIP.
• VAX 11/780 ???????1757 Dhrystones .

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1 ??????

• 1. ????????????
• 2. ?? AXD, ??File? Load Image
• 3. ?? Execute ? Go (??? F5),?????????????,????????
  ?
• 4. ????????,??File ? Reload Current Image ,??????
  then repeat Steps 2,3??

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2 ????

• 1. ??File ? Reload Current Image ,
• 2.?? Execute ? Go (??? F5),
• 3.?????????
• ?????,???Menu?? Toggle Breakpoint
• ?????,?F9,
• ????Margin??
• 4.?? System Views ?Breakpoints ????
• 5. ?F5 ???????????

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2 ????

• 4.?? System Views ?Breakpoints ????
• ????????750??????,?????
• Processor Views ? Variables ,??run_Index??
• 5. ?F5 ???????????

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3. ?????

• 1.??File ? Reload Current Image
• 2.?? Execute ? Go (??? F5)?main()
• 3. ?F5 ????????
• 4. System Views ?Watchpoints,? Watchpoints system
  View????,?Add,?Watchpoints???????

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4. ??????

• 1. ??Variables processor view??????
• 1.??File ? Reload Current Image
• 2.?? Execute ? Go (??? F5),???????Main
• 3. ?F5 ?????
• 4. Processor Views ? Variables ??????????????Local
  ?Global????
• 5.????,?Properties ?Dec,????????
• 6.?F10,?????Execute ? Step????,????????????????var
  iables???

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5 ??????(2)

• 2. ??????????
• 13. ??
• 4. Processor Views ? Watch ??Watch?????????Tab????
  ????
• 5.???,?Add Watch,??Add Watch??,??????????
• 6.?F10,?????Execute ? Step????,????????????????var
  iables???

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6. ?????

• 1.??File ? Reload Current Image
• 2.?? Execute ?Go (??? F5),???????Main
• 3.Processor Views ?Registers???????
• 4.?F10????,????????????????registers????

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7. ??????

• 1.??File ? Reload Current Image
• 2.?? Execute ? Go (??? F5),???????Main
• 3. ?F5 ?????
• 4. Processor Views ? Memory
• 5.?F10????,????????????????registers????

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8. ??????

• 1.??File ? Reload Current Image
• 2.?? Execute ? Go (??? F5),???????Main
• 3. ?Search ? Memory?????????
• 4. ???????????????????
• 5. ?F5???????????????

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2.3 ARM???????

• 1. ??ARM C/C???
• 2. Semihosting??
• 3. ??????ARM C????
• 4. ARM?????

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1. C/C ????

• ????????????????????C???????????????
• ????????????
• ??ARM?
• ??????
• C????????(ATPCS)

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2. ??ARM C/C???

• ARM???????????
• ANSIC C??ISO ?C???????????
• ????\lib\armlib
• C ??ISO C ???????????
• ????\lib\cpplib
• ????ARM???ARM?semihosted????,????I/O???
• semihosted???ARMulator?Multi-ICE??????

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2. ??ARM C/C???

• ANSIC C???
• ?ISO C library standard?????.
• ?semihosted?????????C???????????,?????????????????
  
• ?C / C compilers???help??.

• C ???
• Rogue Wave Standard C Library version 2.01.01
• C compiler???help??
• ???? Rogue Wave library???C ??

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3. Semihosting ??

• ARM???????,???????debuger??????I/O??????C?????????
  ????????

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4. ??????ARM C????

• ?? main()???????????.
• ?????C or C ??????,???????
• ???? stack
• ????,???? heap
• ????????ARM C?????
• ??????ISO-defined functions ???
• ???? runtime errors ?signals ,????????????????????
  ?

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4.1 ??????semihosted ????

• ???????????????
• ????????? semihosting ?? ,?ARMulator, Angel, and
  Multi-ICE
• ??????semihosting SWI ?????

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4.2 ????non-semihosted ????

• 1??????????????
• 2. ???????__use_no_semihosting_swi ??
• ?????
• __use_no_semihosting_swi
• C???
• pragma import(__use_no_semihosting_swi).
• 3.?????????? ?

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5. ARMC/C?????

• ARM C/C?????????????
• ??????ARM C/C???
• ?????,???????????????,???????ARM C???????????

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6. ??????

• ARM??????armar??????ELF?????????,?????????
• ??????????????,????????????,??????????????????????
  ???

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7. C????????ATPCS

• ?????????
• ????
• ????????????,??????C?????
• ?C??????????,??ATPCS????????
• ???????

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8.1 ????

• ????
• __asm( ???? )
• ??
• __asm
• ??1
• ??n

• ??
• ???????????C??????,???char?short?int?????????
• C?????????????????
• ?????????????????

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8.2 ATPCSARM-Thumb Procedure Call Stantard

• ??
• ??????C????????????????????
• ATPCS ???????????
• ???????
• ??????????????

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? ?