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我自己写了裸机启动汇编，很简单的一段，关闭了看门狗，初始化了串口，sdram和nand flash，在链接文件中指定bin文件中代码的放置位置，然后调用C函数把nand flash的数据读出来，放到sdram中，可死活就是第一个字节从flash中读出来，然后把第一个字节给了0x30000000的地址上，完了就读不出来数据，一直从头到尾都是第一个字节的内容。
S3C2440 的裸机启动代码： .globl _start /*关闭看门狗*/ _start: ldr r0, =0x53000000 mov r1,#0 str r1,[r0] @把r1中的值写到r0的地址中 ldr sp,=4*1024 bl clk_init bl sdram_init adr r0,_start ldr r1,=_start ldr r2,=bss_start sub r2,r2,r1 cmp r0,r1 beq clean_bss bl copytosdram cmp r0,#0 bne halt clean_bss: ldr r0,=bss_start ldr r1,=bss_end mov r3,#0 cmp r0,r1 beq on_sdram clean_loop: str r3,[r0],#4 cmp r0,r1 bne clean_loop on_sdram: ldr sp,=0x34000000 ldr pc, =over halt: b halt 链接文件： SECtiONS { . = 0x30000000; .text : { start.o * (.text) } .rodata : { * (.rodata) } .data : { * (.data) } bss_start = . ; .bss ALIGN(4): { * (.bss) * (COMMON) } bss_end = . ; } 这个是拷贝函数： int copytosdram(unsigned long add1,unsigned long add2,unsigned long length) { int ret=0; int i=0; unsigned char ch=0; nand_init(); ret=nand_readbuff(add1,add2,length); return ret; } int nand_readbuff(unsigned long nand_start,unsigned long sdram_buff,unsigned long size) { unsigned long add=nand_start; unsigned long i=0; int l=0; unsigned char *dest=(unsigned char*)sdram_buff; enable_nandflash(); for(i=nand_start;i nand_sendCMD(0x00); nand_sendADD(i); nand_sendCMD(0x30); wait_ready(); for(l=0;l<2048&&i if(l==0) nand_read(); dest=nand_read(); } } disable_nandflash(); return 0; } 再把反汇编文件站上来，以便于大家分析 led.elf： 文件格式 elf32-littlearm Disassembly of section .text: 00000000 <_start>: 0: e3a00453 mov r0, #1392508928 ; 0x53000000 4: e3a01000 mov r1, #0 ; 0x0 8: e5801000 str r1, [r0] c: e3a0da01 mov sp, #4096 ; 0x1000 10: eb000018 bl 78 14: eb00002a bl c4 18: e24f0020 sub r0, pc, #32 ; 0x20 1c: e59f1044 ldr r1, [pc, #68] ; 68 <.text+0x68> 20: e59f2044 ldr r2, [pc, #68] ; 6c <.text+0x6c> 24: e0422001 sub r2, r2, r1 28: e1500001 cmp r0, r1 2c: 0a000002 beq 3c 30: eb000049 bl 15c 34: e3500000 cmp r0, #0 ; 0x0 38: 1a000009 bne 64 0000003c 3c: e59f0028 ldr r0, [pc, #40] ; 6c <.text+0x6c> 40: e59f1028 ldr r1, [pc, #40] ; 70 <.text+0x70> 44: e3a03000 mov r3, #0 ; 0x0 48: e1500001 cmp r0, r1 4c: 0a000002 beq 5c 00000050 50: e4803004 str r3, [r0], #4 54: e1500001 cmp r0, r1 58: 1afffffc bne 50 0000005c 5c: e3a0d30d mov sp, #872415232 ; 0x34000000 60: e59ff00c ldr pc, [pc, #12] ; 74 <.text+0x74> 00000064 64: eafffffe b 64 68: 00000000 andeq r0, r0, r0 6c: 00000930 andeq r0, r0, r0, lsr r9 70: 00000930 andeq r0, r0, r0, lsr r9 74: 00000270 andeq r0, r0, r0, ror r2 00000078 78: e1a0c00d mov ip, sp 7c: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 80: e24cb004 sub fp, ip, #4 ; 0x4 84: e3a02313 mov r2, #1275068416 ; 0x4c000000 88: e3e03000 mvn r3, #0 ; 0x0 8c: e5823000 str r3, [r2] 90: e3a03313 mov r3, #1275068416 ; 0x4c000000 94: e2833014 add r3, r3, #20 ; 0x14 98: e3a02003 mov r2, #3 ; 0x3 9c: e5832000 str r2, [r3] a0: ee110f10 mrc 15, 0, r0, cr1, cr0, {0} a4: e3800103 orr r0, r0, #-1073741824 ; 0xc0000000 a8: ee010f10 mcr 15, 0, r0, cr1, cr0, {0} ac: e3a02313 mov r2, #1275068416 ; 0x4c000000 b0: e2822004 add r2, r2, #4 ; 0x4 b4: e3a03917 mov r3, #376832 ; 0x5c000 b8: e2833012 add r3, r3, #18 ; 0x12 bc: e5823000 str r3, [r2] c0: e89da800 ldmia sp, {fp, sp, pc} 000000c4 c4: e1a0c00d mov ip, sp c8: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} cc: e24cb004 sub fp, ip, #4 ; 0x4 d0: e3a02312 mov r2, #1207959552 ; 0x48000000 d4: e3a03312 mov r3, #1207959552 ; 0x48000000 d8: e5933000 ldr r3, [r3] dc: e3c334ff bic r3, r3, #-16777216 ; 0xff000000 e0: e3833422 orr r3, r3, #570425344 ; 0x22000000 e4: e5823000 str r3, [r2] e8: e3a02312 mov r2, #1207959552 ; 0x48000000 ec: e282201c add r2, r2, #28 ; 0x1c f0: e3a03906 mov r3, #98304 ; 0x18000 f4: e2833005 add r3, r3, #5 ; 0x5 f8: e5823000 str r3, [r2] fc: e3a02312 mov r2, #1207959552 ; 0x48000000 100: e2822020 add r2, r2, #32 ; 0x20 104: e3a03906 mov r3, #98304 ; 0x18000 108: e2833005 add r3, r3, #5 ; 0x5 10c: e5823000 str r3, [r2] 110: e3a02312 mov r2, #1207959552 ; 0x48000000 114: e2822024 add r2, r2, #36 ; 0x24 118: e3a03729 mov r3, #10747904 ; 0xa40000 11c: e2833f79 add r3, r3, #484 ; 0x1e4 120: e2833002 add r3, r3, #2 ; 0x2 124: e5823000 str r3, [r2] 128: e3a03312 mov r3, #1207959552 ; 0x48000000 12c: e2833028 add r3, r3, #40 ; 0x28 130: e3a02032 mov r2, #50 ; 0x32 134: e5832000 str r2, [r3] 138: e3a03312 mov r3, #1207959552 ; 0x48000000 13c: e283302c add r3, r3, #44 ; 0x2c 140: e3a02030 mov r2, #48 ; 0x30 144: e5832000 str r2, [r3] 148: e3a03312 mov r3, #1207959552 ; 0x48000000 14c: e2833030 add r3, r3, #48 ; 0x30 150: e3a02030 mov r2, #48 ; 0x30 154: e5832000 str r2, [r3] 158: e89da800 ldmia sp, {fp, sp, pc} 0000015c 15c: e1a0c00d mov ip, sp 160: e92dd810 s>真美妙b sp!, {r4, fp, ip, lr, pc} 164: e24cb004 sub fp, ip, #4 ; 0x4 168: e24dd01c sub sp, sp, #28 ; 0x1c 16c: e50b0014 str r0, [fp, #-20] 170: e50b1018 str r1, [fp, #-24] 174: e50b201c str r2, [fp, #-28] 178: e51b3014 ldr r3, [fp, #-20] 17c: e50b3020 str r3, [fp, #-32] 180: e51b3018 ldr r3, [fp, #-24] 184: e50b3024 str r3, [fp, #-36] 188: e3a03000 mov r3, #0 ; 0x0 18c: e50b3028 str r3, [fp, #-40] 190: e3a03000 mov r3, #0 ; 0x0 194: e50b302c str r3, [fp, #-44] 198: eb000171 bl 764 19c: eb00011f bl 620 1a0: eb000157 bl 704 1a4: e51b2028 ldr r2, [fp, #-40] 1a8: e51b301c ldr r3, [fp, #-28] 1ac: e1520003 cmp r2, r3 1b0: 2a00002a bcs 260 1b4: e3a00000 mov r0, #0 ; 0x0 1b8: eb000124 bl 650 1bc: e51b0020 ldr r0, [fp, #-32] 1c0: eb00012e bl 680 1c4: eb000115 bl 620 1c8: e3a00030 mov r0, #48 ; 0x30 1cc: eb00011f bl 650 1d0: eb000112 bl 620 1d4: e3a03000 mov r3, #0 ; 0x0 1d8: e50b302c str r3, [fp, #-44] 1dc: e51b202c ldr r2, [fp, #-44] 1e0: e3a03e7f mov r3, #2032 ; 0x7f0 1e4: e283300f add r3, r3, #15 ; 0xf 1e8: e1520003 cmp r2, r3 1ec: ca000017 bgt 250 1f0: e51b2028 ldr r2, [fp, #-40] 1f4: e51b301c ldr r3, [fp, #-28] 1f8: e1520003 cmp r2, r3 1fc: 2a000013 bcs 250 200: e51b3028 ldr r3, [fp, #-40] 204: e3530000 cmp r3, #0 ; 0x0 208: 1a000000 bne 210 20c: eb00014b bl 740 210: e24b0028 sub r0, fp, #40 ; 0x28 214: e5902000 ldr r2, [r0] 218: e1a03002 mov r3, r2 21c: e1a01103 mov r1, r3, lsl #2 220: e51b3024 ldr r3, [fp, #-36] 224: e0814003 add r4, r1, r3 228: e2822001 add r2, r2, #1 ; 0x1 22c: e5802000 str r2, [r0] 230: eb000142 bl 740 234: e1a03000 mov r3, r0 238: e20330ff and r3, r3, #255 ; 0xff 23c: e5843000 str r3, [r4] 240: e51b302c ldr r3, [fp, #-44] 244: e2833001 add r3, r3, #1 ; 0x1 248: e50b302c str r3, [fp, #-44] 24c: eaffffe2 b 1dc 250: e51b3020 ldr r3, [fp, #-32] 254: e2833b02 add r3, r3, #2048 ; 0x800 258: e50b3020 str r3, [fp, #-32] 25c: eaffffd0 b 1a4 260: e3a03000 mov r3, #0 ; 0x0 264: e1a00003 mov r0, r3 268: e24bd010 sub sp, fp, #16 ; 0x10 26c: e89da810 ldmia sp, {r4, fp, sp, pc} 00000270 270: e1a0c00d mov ip, sp 274: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 278: e24cb004 sub fp, ip, #4 ; 0x4 27c: eb000009 bl 2a8 280: eb0000d3 bl 5d4 284: eafffffd b 280 00000288 288: e1a0c00d mov ip, sp 28c: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 290: e24cb004 sub fp, ip, #4 ; 0x4 294: e3a02453 mov r2, #1392508928 ; 0x53000000 298: e3a03902 mov r3, #32768 ; 0x8000 29c: e2833021 add r3, r3, #33 ; 0x21 2a0: e5823000 str r3, [r2] 2a4: e89da800 ldmia sp, {fp, sp, pc} 000002a8 2a8: e1a0c00d mov ip, sp 2ac: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 2b0: e24cb004 sub fp, ip, #4 ; 0x4 2b4: e3a02456 mov r2, #1442840576 ; 0x56000000 2b8: e2822070 add r2, r2, #112 ; 0x70 2bc: e3a03456 mov r3, #1442840576 ; 0x56000000 2c0: e2833070 add r3, r3, #112 ; 0x70 2c4: e5933000 ldr r3, [r3] 2c8: e3c330f0 bic r3, r3, #240 ; 0xf0 2cc: e38330a0 orr r3, r3, #160 ; 0xa0 2d0: e5823000 str r3, [r2] 2d4: e3a02456 mov r2, #1442840576 ; 0x56000000 2d8: e2822078 add r2, r2, #120 ; 0x78 2dc: e3a03456 mov r3, #1442840576 ; 0x56000000 2e0: e2833078 add r3, r3, #120 ; 0x78 2e4: e5933000 ldr r3, [r3] 2e8: e3c3300c bic r3, r3, #12 ; 0xc 2ec: e383300c orr r3, r3, #12 ; 0xc 2f0: e5823000 str r3, [r2] 2f4: e3a02205 mov r2, #1342177280 ; 0x50000000 2f8: e3a03003 mov r3, #3 ; 0x3 2fc: e5823000 str r3, [r2] 300: e3a02245 mov r2, #1342177284 ; 0x50000004 304: e3a03b02 mov r3, #2048 ; 0x800 308: e2833005 add r3, r3, #5 ; 0x5 30c: e5823000 str r3, [r2] 310: e3a03205 mov r3, #1342177280 ; 0x50000000 314: e2833028 add r3, r3, #40 ; 0x28 318: e3a0201a mov r2, #26 ; 0x1a 31c: e5832000 str r2, [r3] 320: e89da800 ldmia sp, {fp, sp, pc} 00000324 324: e1a0c00d mov ip, sp 328: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 32c: e24cb004 sub fp, ip, #4 ; 0x4 330: e24dd010 sub sp, sp, #16 ; 0x10 334: e50b0010 str r0, [fp, #-16] 338: e1a03001 mov r3, r1 33c: e50b2018 str r2, [fp, #-24] 340: e54b3011 strb r3, [fp, #-17] 344: e51b3010 ldr r3, [fp, #-16] 348: e50b301c str r3, [fp, #-28] 34c: e24b3018 sub r3, fp, #24 ; 0x18 350: e5932000 ldr r2, [r3] 354: e1a01002 mov r1, r2 358: e2422001 sub r2, r2, #1 ; 0x1 35c: e5832000 str r2, [r3] 360: e3510000 cmp r1, #0 ; 0x0 364: da000007 ble 388 368: e24b001c sub r0, fp, #28 ; 0x1c 36c: e5903000 ldr r3, [r0] 370: e1a01003 mov r1, r3 374: e55b2011 ldrb r2, [fp, #-17] 378: e5c12000 strb r2, [r1] 37c: e2833001 add r3, r3, #1 ; 0x1 380: e5803000 str r3, [r0] 384: eafffff0 b 34c 388: e24bd00c sub sp, fp, #12 ; 0xc 38c: e89da800 ldmia sp, {fp, sp, pc} 00000390 390: e1a0c00d mov ip, sp 394: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 398: e24cb004 sub fp, ip, #4 ; 0x4 39c: e24dd008 sub sp, sp, #8 ; 0x8 3a0: e50b0010 str r0, [fp, #-16] 3a4: e3a03000 mov r3, #0 ; 0x0 3a8: e50b3014 str r3, [fp, #-20] 3ac: e24b2010 sub r2, fp, #16 ; 0x10 3b0: e5923000 ldr r3, [r2] 3b4: e5d31000 ldrb r1, [r3] 3b8: e2833001 add r3, r3, #1 ; 0x1 3bc: e5823000 str r3, [r2] 3c0: e20130ff and r3, r1, #255 ; 0xff 3c4: e3530000 cmp r3, #0 ; 0x0 3c8: 0a000003 beq 3dc 3cc: e51b3014 ldr r3, [fp, #-20] 3d0: e2833001 add r3, r3, #1 ; 0x1 3d4: e50b3014 str r3, [fp, #-20] 3d8: eafffff3 b 3ac 3dc: e51b3014 ldr r3, [fp, #-20] 3e0: e1a00003 mov r0, r3 3e4: e24bd00c sub sp, fp, #12 ; 0xc 3e8: e89da800 ldmia sp, {fp, sp, pc} 000003ec 3ec: e1a0c00d mov ip, sp 3f0: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 3f4: e24cb004 sub fp, ip, #4 ; 0x4 3f8: e24dd004 sub sp, sp, #4 ; 0x4 3fc: e1a03000 mov r3, r0 400: e54b300d strb r3, [fp, #-13] 404: e3a03205 mov r3, #1342177280 ; 0x50000000 408: e2833010 add r3, r3, #16 ; 0x10 40c: e5933000 ldr r3, [r3] 410: e1a030a3 mov r3, r3, lsr #1 414: e2033001 and r3, r3, #1 ; 0x1 418: e3530000 cmp r3, #0 ; 0x0 41c: 1a000000 bne 424 420: eafffff7 b 404 424: e3a03205 mov r3, #1342177280 ; 0x50000000 428: e2833020 add r3, r3, #32 ; 0x20 42c: e55b200d ldrb r2, [fp, #-13] 430: e5832000 str r2, [r3] 434: e3a03001 mov r3, #1 ; 0x1 438: e1a00003 mov r0, r3 43c: e89da808 ldmia sp, {r3, fp, sp, pc} 00000440 440: e1a0c00d mov ip, sp 444: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 448: e24cb004 sub fp, ip, #4 ; 0x4 44c: e24dd00c sub sp, sp, #12 ; 0xc 450: e50b0010 str r0, [fp, #-16] 454: e50b1014 str r1, [fp, #-20] 458: e3a03000 mov r3, #0 ; 0x0 45c: e50b3018 str r3, [fp, #-24] 460: e3a03000 mov r3, #0 ; 0x0 464: e50b3018 str r3, [fp, #-24] 468: e51b2018 ldr r2, [fp, #-24] 46c: e51b3014 ldr r3, [fp, #-20] 470: e1520003 cmp r2, r3 474: aa000012 bge 4c4 478: e3a03205 mov r3, #1342177280 ; 0x50000000 47c: e2833010 add r3, r3, #16 ; 0x10 480: e5933000 ldr r3, [r3] 484: e1a030a3 mov r3, r3, lsr #1 488: e2033001 and r3, r3, #1 ; 0x1 48c: e3530000 cmp r3, #0 ; 0x0 490: 1a000000 bne 498 494: eafffff7 b 478 498: e3a02205 mov r2, #1342177280 ; 0x50000000 49c: e2822020 add r2, r2, #32 ; 0x20 4a0: e51b1010 ldr r1, [fp, #-16] 4a4: e51b3018 ldr r3, [fp, #-24] 4a8: e0813003 add r3, r1, r3 4ac: e5d33000 ldrb r3, [r3] 4b0: e5823000 str r3, [r2] 4b4: e51b3018 ldr r3, [fp, #-24] 4b8: e2833001 add r3, r3, #1 ; 0x1 4bc: e50b3018 str r3, [fp, #-24] 4c0: eaffffe8 b 468 4c4: e51b3018 ldr r3, [fp, #-24] 4c8: e1a00003 mov r0, r3 4cc: e24bd00c sub sp, fp, #12 ; 0xc 4d0: e89da800 ldmia sp, {fp, sp, pc} 000004d4 4d4: e1a0c00d mov ip, sp 4d8: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 4dc: e24cb004 sub fp, ip, #4 ; 0x4 4e0: e3a03205 mov r3, #1342177280 ; 0x50000000 4e4: e2833010 add r3, r3, #16 ; 0x10 4e8: e5933000 ldr r3, [r3] 4ec: e2033001 and r3, r3, #1 ; 0x1 4f0: e3530000 cmp r3, #0 ; 0x0 4f4: 1a000000 bne 4fc 4f8: eafffff8 b 4e0 4fc: e3a03205 mov r3, #1342177280 ; 0x50000000 500: e2833024 add r3, r3, #36 ; 0x24 504: e5933000 ldr r3, [r3] 508: e20330ff and r3, r3, #255 ; 0xff 50c: e1a00003 mov r0, r3 510: e89da800 ldmia sp, {fp, sp, pc} 00000514 514: e1a0c00d mov ip, sp 518: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 51c: e24cb004 sub fp, ip, #4 ; 0x4 520: e24dd010 sub sp, sp, #16 ; 0x10 524: e50b0010 str r0, [fp, #-16] 528: e3a03000 mov r3, #0 ; 0x0 52c: e50b3014 str r3, [fp, #-20] 530: e3a03000 mov r3, #0 ; 0x0 534: e50b3018 str r3, [fp, #-24] 538: e3a03000 mov r3, #0 ; 0x0 53c: e50b301c str r3, [fp, #-28] 540: e51b2014 ldr r2, [fp, #-20] 544: e3a03cff mov r3, #65280 ; 0xff00 548: e28330fe add r3, r3, #254 ; 0xfe 54c: e1520003 cmp r2, r3 550: 8a00001b bhi 5c4 554: e3a03205 mov r3, #1342177280 ; 0x50000000 558: e2833010 add r3, r3, #16 ; 0x10 55c: e5933000 ldr r3, [r3] 560: e2033001 and r3, r3, #1 ; 0x1 564: e3530000 cmp r3, #0 ; 0x0 568: 0a00000e beq 5a8 56c: e51b2010 ldr r2, [fp, #-16] 570: e51b3018 ldr r3, [fp, #-24] 574: e0822003 add r2, r2, r3 578: e3a03205 mov r3, #1342177280 ; 0x50000000 57c: e2833024 add r3, r3, #36 ; 0x24 580: e5933000 ldr r3, [r3] 584: e5c23000 strb r3, [r2] 588: e3a03001 mov r3, #1 ; 0x1 58c: e50b301c str r3, [fp, #-28] 590: e3a03000 mov r3, #0 ; 0x0 594: e50b3014 str r3, [fp, #-20] 598: e51b3018 ldr r3, [fp, #-24] 59c: e2833001 add r3, r3, #1 ; 0x1 5a0: e50b3018 str r3, [fp, #-24] 5a4: eaffffe5 b 540 5a8: e51b301c ldr r3, [fp, #-28] 5ac: e3530001 cmp r3, #1 ; 0x1 5b0: 1affffe2 bne 540 5b4: e51b3014 ldr r3, [fp, #-20] 5b8: e2833001 add r3, r3, #1 ; 0x1 5bc: e50b3014 str r3, [fp, #-20] 5c0: eaffffde b 540 5c4: e51b3018 ldr r3, [fp, #-24] 5c8: e1a00003 mov r0, r3 5cc: e24bd00c sub sp, fp, #12 ; 0xc 5d0: e89da800 ldmia sp, {fp, sp, pc} 000005d4 5d4: e1a0c00d mov ip, sp 5d8: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 5dc: e24cb004 sub fp, ip, #4 ; 0x4 5e0: e24dd008 sub sp, sp, #8 ; 0x8 5e4: e3a03000 mov r3, #0 ; 0x0 5e8: e54b300d strb r3, [fp, #-13] 5ec: e3a03000 mov r3, #0 ; 0x0 5f0: e54b300e strb r3, [fp, #-14] 5f4: e59f3020 ldr r3, [pc, #32] ; 61c <.text+0x61c> 5f8: e50b3014 str r3, [fp, #-20] 5fc: e51b0014 ldr r0, [fp, #-20] 600: ebffff62 bl 390 604: e1a03000 mov r3, r0 608: e51b0014 ldr r0, [fp, #-20] 60c: e1a01003 mov r1, r3 610: ebffff8a bl 440 614: e24bd00c sub sp, fp, #12 ; 0xc 618: e89da800 ldmia sp, {fp, sp, pc} 61c: 00000894 muleq r0, r4, r8 00000620 620: e1a0c00d mov ip, sp 624: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 628: e24cb004 sub fp, ip, #4 ; 0x4 62c: e3a0344e mov r3, #1308622848 ; 0x4e000000 630: e2833020 add r3, r3, #32 ; 0x20 634: e5933000 ldr r3, [r3] 638: e2233001 eor r3, r3, #1 ; 0x1 63c: e2033001 and r3, r3, #1 ; 0x1 640: e3530000 cmp r3, #0 ; 0x0 644: 0a000000 beq 64c 648: eafffff7 b 62c 64c: e89da800 ldmia sp, {fp, sp, pc} 00000650 650: e1a0c00d mov ip, sp 654: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 658: e24cb004 sub fp, ip, #4 ; 0x4 65c: e24dd004 sub sp, sp, #4 ; 0x4 660: e1a03000 mov r3, r0 664: e54b300d strb r3, [fp, #-13] 668: ebffffec bl 620 66c: e3a0344e mov r3, #1308622848 ; 0x4e000000 670: e2833008 add r3, r3, #8 ; 0x8 674: e55b200d ldrb r2, [fp, #-13] 678: e5c32000 strb r2, [r3] 67c: e89da808 ldmia sp, {r3, fp, sp, pc} 00000680 680: e1a0c00d mov ip, sp 684: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 688: e24cb004 sub fp, ip, #4 ; 0x4 68c: e24dd004 sub sp, sp, #4 ; 0x4 690: e50b0010 str r0, [fp, #-16] 694: ebffffe1 bl 620 698: e3a0344e mov r3, #1308622848 ; 0x4e000000 69c: e283300c add r3, r3, #12 ; 0xc 6a0: e51b2010 ldr r2, [fp, #-16] 6a4: e5c32000 strb r2, [r3] 6a8: e3a0244e mov r2, #1308622848 ; 0x4e000000 6ac: e282200c add r2, r2, #12 ; 0xc 6b0: e51b3010 ldr r3, [fp, #-16] 6b4: e1a03423 mov r3, r3, lsr #8 6b8: e2033007 and r3, r3, #7 ; 0x7 6bc: e5c23000 strb r3, [r2] 6c0: e3a0244e mov r2, #1308622848 ; 0x4e000000 6c4: e282200c add r2, r2, #12 ; 0xc 6c8: e51b3010 ldr r3, [fp, #-16] 6cc: e1a035a3 mov r3, r3, lsr #11 6d0: e5c23000 strb r3, [r2] 6d4: e3a0244e mov r2, #1308622848 ; 0x4e000000 6d8: e282200c add r2, r2, #12 ; 0xc 6dc: e51b3010 ldr r3, [fp, #-16] 6e0: e1a03ea3 mov r3, r3, lsr #29 6e4: e5c23000 strb r3, [r2] 6e8: e3a0244e mov r2, #1308622848 ; 0x4e000000 6ec: e282200c add r2, r2, #12 ; 0xc 6f0: e51b3010 ldr r3, [fp, #-16] 6f4: e1a03da3 mov r3, r3, lsr #27 6f8: e2033001 and r3, r3, #1 ; 0x1 6fc: e5c23000 strb r3, [r2] 700: e89da808 ldmia sp, {r3, fp, sp, pc} 00000704 704: e1a0c00d mov ip, sp 708: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 70c: e24cb004 sub fp, ip, #4 ; 0x4 710: ebffffc2 bl 620 714: e3a0244e mov r2, #1308622848 ; 0x4e000000 718: e2822004 add r2, r2, #4 ; 0x4 71c: e3a0344e mov r3, #1308622848 ; 0x4e000000 720: e2833004 add r3, r3, #4 ; 0x4 724: e5933000 ldr r3, [r3] 728: e3c33002 bic r3, r3, #2 ; 0x2 72c: e5823000 str r3, [r2] 730: e3a000ff mov r0, #255 ; 0xff 734: ebffffc5 bl 650 738: ebffffb8 bl 620 73c: e89da800 ldmia sp, {fp, sp, pc} 00000740 740: e1a0c00d mov ip, sp 744: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 748: e24cb004 sub fp, ip, #4 ; 0x4 74c: e3a0344e mov r3, #1308622848 ; 0x4e000000 750: e2833010 add r3, r3, #16 ; 0x10 754: e5d33000 ldrb r3, [r3] 758: e20330ff and r3, r3, #255 ; 0xff 75c: e1a00003 mov r0, r3 760: e89da800 ldmia sp, {fp, sp, pc} 00000764 764: e1a0c00d mov ip, sp 768: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 76c: e24cb004 sub fp, ip, #4 ; 0x4 770: e3a02456 mov r2, #1442840576 ; 0x56000000 774: e2822060 add r2, r2, #96 ; 0x60 778: e3a03456 mov r3, #1442840576 ; 0x56000000 77c: e2833060 add r3, r3, #96 ; 0x60 780: e5933000 ldr r3, [r3] 784: e3c3333f bic r3, r3, #-67108864 ; 0xfc000000 788: e5823000 str r3, [r2] 78c: e3a0044e mov r0, #1308622848 ; 0x4e000000 790: e3a0344e mov r3, #1308622848 ; 0x4e000000 794: e3a0244e mov r2, #1308622848 ; 0x4e000000 798: e5931000 ldr r1, [r3] 79c: e5923000 ldr r3, [r2] 7a0: e1813003 orr r3, r1, r3 7a4: e3c32001 bic r2, r3, #1 ; 0x1 7a8: e3a0344e mov r3, #1308622848 ; 0x4e000000 7ac: e5933000 ldr r3, [r3] 7b0: e1823003 orr r3, r2, r3 7b4: e3833001 orr r3, r3, #1 ; 0x1 7b8: e5803000 str r3, [r0] 7bc: e3a0344e mov r3, #1308622848 ; 0x4e000000 7c0: e2833004 add r3, r3, #4 ; 0x4 7c4: e3a02073 mov r2, #115 ; 0x73 7c8: e5832000 str r2, [r3] 7cc: e3a0244e mov r2, #1308622848 ; 0x4e000000 7d0: e2822020 add r2, r2, #32 ; 0x20 7d4: e3a0344e mov r3, #1308622848 ; 0x4e000000 7d8: e2833020 add r3, r3, #32 ; 0x20 7dc: e5933000 ldr r3, [r3] 7e0: e3833004 orr r3, r3, #4 ; 0x4 7e4: e5823000 str r3, [r2] 7e8: e89da800 ldmia sp, {fp, sp, pc} 000007ec 7ec: e1a0c00d mov ip, sp 7f0: e92dd800 s>真美妙b sp!, {fp, ip, lr, pc} 7f4: e24cb004 sub fp, ip, #4 ; 0x4 7f8: e24dd00c sub sp, sp, #12 ; 0xc 7fc: e50b0010 str r0, [fp, #-16] 800: e50b1014 str r1, [fp, #-20] 804: e3a03000 mov r3, #0 ; 0x0 808: e50b3018 str r3, [fp, #-24] 80c: e51b3010 ldr r3, [fp, #-16] 810: e5d32000 ldrb r2, [r3] 814: e51b3014 ldr r3, [fp, #-20] 818: e5d33000 ldrb r3, [r3] 81c: e0633002 r*** r3, r3, r2 820: e50b3018 str r3, [fp, #-24] 824: e3530000 cmp r3, #0 ; 0x0 828: 1a00000a bne 858 82c: e51b3014 ldr r3, [fp, #-20] 830: e5d33000 ldrb r3, [r3] 834: e3530000 cmp r3, #0 ; 0x0 838: 0a000006 beq 858 83c: e51b3010 ldr r3, [fp, #-16] 840: e2833001 add r3, r3, #1 ; 0x1 844: e50b3010 str r3, [fp, #-16] 848: e51b3014 ldr r3, [fp, #-20] 84c: e2833001 add r3, r3, #1 ; 0x1 850: e50b3014 str r3, [fp, #-20] 854: eaffffec b 80c 858: e51b3018 ldr r3, [fp, #-24] 85c: e3530000 cmp r3, #0 ; 0x0 860: aa000002 bge 870 864: e3e03000 mvn r3, #0 ; 0x0 868: e50b3018 str r3, [fp, #-24] 86c: ea000004 b 884 870: e51b3018 ldr r3, [fp, #-24] 874: e3530000 cmp r3, #0 ; 0x0 878: da000001 ble 884 87c: e3a03001 mov r3, #1 ; 0x1 880: e50b3018 str r3, [fp, #-24] 884: e51b3018 ldr r3, [fp, #-24] 888: e1a00003 mov r0, r3 88c: e24bd00c sub sp, fp, #12 ; 0xc 890: e89da800 ldmia sp, {fp, sp, pc} Disassembly of section .rodata: 00000894 <.rodata>: 894: 23090a0d tstcs r9, #53248 ; 0xd000 898: 2a2a2a2a bcs a8b148 89c: 2a2a2a2a bcs a8b14c 8a0: 2a2a2a2a bcs a8b150 8a4: 2a2a2a2a bcs a8b154 8a8: 2a2a2a2a bcs a8b158 8ac: 2a2a2a2a bcs a8b15c 8b0: 2a2a2a2a bcs a8b160 8b4: 2a2a2a2a bcs a8b164 8b8: 2a2a2a2a bcs a8b168 8bc: 2a2a2a2a bcs a8b16c 8c0: 0a0d232a beq 349570 8c4: 20202309 eorcs r2, r0, r9, lsl #6 8c8: 20202020 eorcs r2, r0, r0, lsr #32 8cc: 20202020 eorcs r2, r0, r0, lsr #32 8d0: 20202020 eorcs r2, r0, r0, lsr #32 8d4: 74726175 ldrvcbt r6, [r2], #-373 8d8: 65706f20 ldrv*** r6, [r0, #-3872]! 8dc: 69746172 ldmvsdb r4!, {r1, r4, r5, r6, r8, sp, lr}^ 8e0: 20206e6f eorcs r6, r0, pc, ror #28 8e4: 20202020 eorcs r2, r0, r0, lsr #32 8e8: 20202020 eorcs r2, r0, r0, lsr #32 8ec: 23202020 teqcs r0, #32 ; 0x20 8f0: 23090a0d tstcs r9, #53248 ; 0xd000 8f4: 2a2a2a2a bcs a8b1a4 8f8: 2a2a2a2a bcs a8b1a8 8fc: 2a2a2a2a bcs a8b1ac 900: 2a2a2a2a bcs a8b1b0 904: 2a2a2a2a bcs a8b1b4 908: 2a2a2a2a bcs a8b1b8 90c: 2a2a2a2a bcs a8b1bc 910: 2a2a2a2a bcs a8b1c0 914: 2a2a2a2a bcs a8b1c4 918: 2a2a2a2a bcs a8b1c8 91c: 0a0d232a beq 3495cc 920: 706e6909 r***vc r6, lr, r9, lsl #18 924: 73207475 teqvc r0, #1962934272 ; 0x75000000 928: 63656c65 cmnvs r5, #25856 ; 0x6500 92c: 00093a74 andeq r3, r9, r4, ror sl Disassembly of section .comment: 00000000 <.comment>: 0: 43434700 cmpmi r3, #0 ; 0x0 4: 4728203a undefined 8: 2029554e eorcs r5, r9, lr, asr #10 c: 2e342e33 mrccs 14, 1, r2, cr4, cr3, {1} 10: 47000032 smladxmi r0, r2, r0, r0 14: 203a4343 eorcss r4, sl, r3, asr #6 18: 554e4728 strplb r4, [lr, #-1832] 1c: 2e332029 cdpcs 0, 3, cr2, cr3, cr9, {1} 20: 00322e34 eoreqs r2, r2, r4, lsr lr 24: 43434700 cmpmi r3, #0 ; 0x0 28: 4728203a undefined 2c: 2029554e eorcs r5, r9, lr, asr #10 30: 2e342e33 mrccs 14, 1, r2, cr4, cr3, {1} 34: 47000032 smladxmi r0, r2, r0, r0 38: 203a4343 eorcss r4, sl, r3, asr #6 3c: 554e4728 strplb r4, [lr, #-1832] 40: 2e332029 cdpcs 0, 3, cr2, cr3, cr9, {1} 44: 00322e34 eoreqs r2, r2, r4, lsr lr 48: 43434700 cmpmi r3, #0 ; 0x0 4c: 4728203a undefined 50: 2029554e eorcs r5, r9, lr, asr #10 54: 2e342e33 mrccs 14, 1, r2, cr4, cr3, {1} 58: 47000032 smladxmi r0, r2, r0, r0 5c: 203a4343 eorcss r4, sl, r3, asr #6 60: 554e4728 strplb r4, [lr, #-1832] 64: 2e332029 cdpcs 0, 3, cr2, cr3, cr9, {1} 68: 00322e34 eoreqs r2, r2, r4, lsr lr 高手帮我找找哪儿出问题了，感激不尽！ 
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