ARM assembler guide DUI0068是一个RISC指令结构，因为有一个加载存储结构。

只有load和store可以读取内存。

ARM的处理器模式可以全部大写或小写，不能混标志符表示一个地址常量的定义格式：1230x1C2_1001ARM编译、链接后最终生成一个ELF格式（Executable and Linking Format）的可执行文件（后缀.axf）ELF中是分section部分的，一个ELF section在汇编中定义一个section使用AREA指令。

ENTRY指令指示汇编代码第一条要执行的指令。

start是一个标识符，代表一个地址。

结束的方式是产生一个软件中断，把控制权交给调试器。

END指令指示汇编的结束使用cmd进行调试：Microsoft Windows XP [版本5.1.2600](C) 版权所有1985-2001 Microsoft Corp.C:\Documents and Settings\Administrator>cd D:\Program Files\ARM\ADSv1_2\BinC:\Documents and Settings\Administrator>D;'D' 不是内部或外部命令，也不是可运行的程序或批处理文件。

C:\Documents and Settings\Administrator>D:D:\Program Files\ARM\ADSv1_2\Bin>armsd E:\dsparm\pxa270\project\armex\__image.ax fARM Source-level Debugger, ADS1.2 [Build 805]Software supplied by: Team-EFASoftware supplied by: Team-EFAARM7TDMI, BIU, Little endian, Semihosting, Debug Comms Channel, 4GB, Mapfile, Timer, Profiler, Tube, Millisecond [20000 cycles_per_millisecond], Pagetables,IntCtrl, Tracer, RDI CodesequencesObject program file E:\dsparm\pxa270\project\armex\__image.axfarmsd: helphelp [<keyword>]Display help information on one of the following commands:Registers Fpregisters Coproc CRegisters CREGDefCWrite Step Istep Examine ListQuit Obey Go Break Unbreak Watch UNWatch Print CONtext OUtIN WHere BAcktrace Variable SYmbols LSym LEt Arguments LAnguage HelpType CAll WHIle ALias LOadLOG RELoad REAdsyms FInd PUtfile GEtfile LOCalvar COMment PAuse LOADConfig SElectconfig LISTConfig LOADAgent PROfon PROFOFf PROFClear PROFWrite CCin CCOut PROCessor SYS SETregister TRacetrigger TRACEExtent TRACEWrite TRACEStart TRACESTOp TRACEFlushHELP * gives helps on all available commands. To print the help use the LOGcommand to record the help output into a file & print the file.If the first character of a line is the '!' character the rest of the commandline is executed by a call to system(). If the first character of a line isthe '|' character the rest of the line is a treated as a comment.Note that this help is not intended to replace the printed manual whichexplains ARMSD in much greater detail.armsd: LOG** Error: No log filearmsd: stepStep completed at PC = 0x000080040x00008004: 0xe3a01003 .... : mov r1,#3armsd: Registerr0 = 0x0000000a r1 = 0x00000000 r2 = 0x00000000 r3 = 0x00000000r4 = 0x00000000 r5 = 0x00000000 r6 = 0x00000000 r7 = 0x00000000r8 = 0x00000000 r9 = 0x00000000 r10 = 0x00000000 r11 = 0x00000000r12 = 0x00000000 r13 = 0x00000000 r14 = 0x00000000pc = 0x00008004 cpsr = %nzcvqIFt_SVC spsr = %nzcvqift_Reserved_00armsd: stepStep completed at PC = 0x000080080x00008008: 0xe0800001 .... : add r0,r0,r1armsd: Registerr0 = 0x0000000a r1 = 0x00000003r2 = 0x00000000 r3 = 0x00000000r8 = 0x00000000 r9 = 0x00000000 r10 = 0x00000000 r11 = 0x00000000 r12 = 0x00000000 r13 = 0x00000000 r14 = 0x00000000pc = 0x00008008 cpsr = %nzcvqIFt_SVC spsr = %nzcvqift_Reserved_00 armsd: stepStep completed at PC = 0x0000800c0x0000800c: 0xe3a00018 .... : mov r0,#0x18armsd: LOG** Error: No log filearmsd: Registerr0 = 0x0000000d r1 = 0x00000003 r2 = 0x00000000 r3 = 0x00000000 r4 = 0x00000000 r5 = 0x00000000 r6 = 0x00000000 r7 = 0x00000000 r8 = 0x00000000 r9 = 0x00000000 r10 = 0x00000000 r11 = 0x00000000 r12 = 0x00000000 r13 = 0x00000000 r14 = 0x00000000pc = 0x0000800c cpsr = %nzcvqIFt_SVC spsr = %nzcvqift_Reserved_00 armsd: stepStep completed at PC = 0x000080100x00008010: 0xe59f1000 .... : ldr r1,0x00008018 ; = #0x00020026 armsd: Registerr0 = 0x00000018 r1 = 0x00000003 r2 = 0x00000000 r3 = 0x00000000 r4 = 0x00000000 r5 = 0x00000000 r6 = 0x00000000 r7 = 0x00000000 r8 = 0x00000000 r9 = 0x00000000 r10 = 0x00000000 r11 = 0x00000000 r12 = 0x00000000 r13 = 0x00000000 r14 = 0x00000000pc = 0x00008010 cpsr = %nzcvqIFt_SVC spsr = %nzcvqift_Reserved_00 armsd: stepStep completed at PC = 0x000080140x00008014: 0xef123456 V4.. : swi 0x123456armsd: Registerr0 = 0x00000018 r1 = 0x00020026 r2 = 0x00000000 r3 = 0x00000000 r4 = 0x00000000 r5 = 0x00000000 r6 = 0x00000000 r7 = 0x00000000 r8 = 0x00000000 r9 = 0x00000000 r10 = 0x00000000 r11 = 0x00000000 r12 = 0x00000000 r13 = 0x00000000 r14 = 0x00000000pc = 0x00008014 cpsr = %nzcvqIFt_SVC spsr = %nzcvqift_Reserved_00 armsd: stepProgram terminated normally at PC = 0x000080140x00008014: 0xef123456 V4.. : swi 0x123456armsd: Registerr0 = 0x00000018 r1 = 0x00020026 r2 = 0x00000000 r3 = 0x00000000 r4 = 0x00000000 r5 = 0x00000000 r6 = 0x00000000 r7 = 0x00000000 r8 = 0x00000000 r9 = 0x00000000 r10 = 0x00000000 r11 = 0x00000000 r12 = 0x00000000 r13 = 0x00000000 r14 = 0x00000000pc = 0x00008014 cpsr = %nzcvqIFt_SVC spsr = %nzcvqift_Reserved_00 armsd: quitQuittingD:\Program Files\ARM\ADSv1_2\Bin>使用armsd调试有点像微机原理上调试汇编，爽！MOV叫指令，常数范围是0-255LDR叫伪指令都是将常数放到Reg中#和FIELD指令是一样的符号在汇编程序中代表一个地址，可以用在指令中，汇编程序经过汇编器的处理之后，所有的符号都被替换成它所代表的地址值。