我正在尝试链接我的.o文件，以生成在ARM M0 +裸机上运行的ELF。我正在使用arm-none-eabi-gcc。如果我只是写了我的C文件，它链接正常，我可以运行它没有问题。 （为此我向GCC提供-lnosys -lc -lm标志）
但是出于我的目的，我需要'覆盖'其中一个库函数，即__aeabi_fmul。为此，我对此函数进行了反汇编，并创建了一个自定义文件aeabi_fmul.S，我将其单独编译。现在我需要将这个aeabi_fmul.o文件与我的C源代码链接起来（这样最后的二进制文件将使用我的fmul而不是库的实现）
似乎正好链接此文件（列表显示二进制内容在此处相同），但是，如果我执行objdump -D，则似乎没有任何.rodata或˚我的'修改过的'ELF中的部分。
这导致我的程序在执行分支指令时“随机”挂起，我猜测它与这些缺失的部分相关联（因为其他所有部分都与“工作”版本匹配1：1）
__aeabi_fmul中链接的事实是否导致这些部分无法链接？编辑：
反汇编工作代码。
main.elf：文件格式elf32-littlearm
反汇编.text：
00000000 <hang-0x50>:
0: 40800000 addmi r0, r0, r0
4: 00000053 andeq r0, r0, r3, asr r0
8: 00000051 andeq r0, r0, r1, asr r0
c: 00000051 andeq r0, r0, r1, asr r0
10: 00000051 andeq r0, r0, r1, asr r0
14: 00000051 andeq r0, r0, r1, asr r0
18: 00000051 andeq r0, r0, r1, asr r0
1c: 00000051 andeq r0, r0, r1, asr r0
20: 00000051 andeq r0, r0, r1, asr r0
24: 00000051 andeq r0, r0, r1, asr r0
28: 00000051 andeq r0, r0, r1, asr r0
2c: 00000051 andeq r0, r0, r1, asr r0
30: 00000051 andeq r0, r0, r1, asr r0
34: 00000051 andeq r0, r0, r1, asr r0
38: 00000051 andeq r0, r0, r1, asr r0
3c: 00000051 andeq r0, r0, r1, asr r0
40: 00000051 andeq r0, r0, r1, asr r0
44: 00000051 andeq r0, r0, r1, asr r0
48: 00000051 andeq r0, r0, r1, asr r0
4c: 00000051 andeq r0, r0, r1, asr r0
00000050 <hang>:
50: e7fe b.n 50 <hang>
00000052 <_start>:
52: f000 f89b bl 18c <main>
00000056 <exit>:
56: df01 svc 1
58: e7fe b.n 58 <exit+0x2>
0000005a <putchar>:
5a: b580 push {r7, lr}
5c: af00 add r7, sp, #0
5e: 22e0 movs r2, #224 ; 0xe0
60: 0612 lsls r2, r2, #24
62: 6010 str r0, [r2, #0]
64: 46bd mov sp, r7
66: bd80 pop {r7, pc}
00000068 <PUT32>:
68: 6001 str r1, [r0, #0]
6a: 4770 bx lr
0000006c <GET32>:
6c: 6800 ldr r0, [r0, #0]
6e: 4770 bx lr
00000070 <PUTGETCLR>:
70: 6802 ldr r2, [r0, #0]
72: 438a bics r2, r1
74: 6002 str r2, [r0, #0]
76: 4770 bx lr
00000078 <atest>:
78: 1842 adds r2, r0, r1
7a: 2000 movs r0, #0
7c: d701 bvc.n 82 <atest1>
7e: 2301 movs r3, #1
80: 4318 orrs r0, r3
00000082 <atest1>:
82: d301 bcc.n 88 <atest2>
84: 2302 movs r3, #2
86: 4318 orrs r0, r3
00000088 <atest2>:
88: 4770 bx lr
0000008a <stest>:
8a: 1a42 subs r2, r0, r1
8c: 2000 movs r0, #0
8e: d701 bvc.n 94 <stest1>
90: 2301 movs r3, #1
92: 4318 orrs r0, r3
00000094 <stest1>:
94: d301 bcc.n 9a <stest2>
96: 2302 movs r3, #2
98: 4318 orrs r0, r3
0000009a <stest2>:
9a: 4770 bx lr
0000009c <returnvcflags>:
9c: d703 bvc.n a6 <returnvcflags+0xa>
9e: d306 bcc.n ae <returnvcflags+0x12>
a0: 2003 movs r0, #3
a2: 0700 lsls r0, r0, #28
a4: 4770 bx lr
a6: d305 bcc.n b4 <returnvcflags+0x18>
a8: 2002 movs r0, #2
aa: 0700 lsls r0, r0, #28
ac: 4770 bx lr
ae: 2001 movs r0, #1
b0: 0700 lsls r0, r0, #28
b2: 4770 bx lr
b4: 2000 movs r0, #0
b6: 0700 lsls r0, r0, #28
b8: 4770 bx lr
000000ba <testfun1>:
ba: 2200 movs r2, #0
bc: 41d2 rors r2, r2
be: 4148 adcs r0, r1
c0: e7ec b.n 9c <returnvcflags>
000000c2 <testfun2>:
c2: 2201 movs r2, #1
c4: 41d2 rors r2, r2
c6: 4148 adcs r0, r1
c8: e7e8 b.n 9c <returnvcflags>
000000ca <testfun3>:
ca: 2200 movs r2, #0
cc: 41d2 rors r2, r2
ce: 4188 sbcs r0, r1
d0: e7e4 b.n 9c <returnvcflags>
000000d2 <testfun4>:
d2: 2201 movs r2, #1
d4: 41d2 rors r2, r2
d6: 4188 sbcs r0, r1
d8: e7e0 b.n 9c <returnvcflags>
000000da <PUTGETSET>:
da: 6802 ldr r2, [r0, #0]
dc: 430a orrs r2, r1
de: 6002 str r2, [r0, #0]
e0: 4770 bx lr
...
000000e4 <_fini>:
e4: 46c0 nop ; (mov r8, r8)
e6: 4770 bx lr
000000e8 <__exidx_start>:
e8: 46c0 nop ; (mov r8, r8)
ea: 4770 bx lr
000000ec <__exidx_end>:
ec: 46c0 nop ; (mov r8, r8)
ee: 4770 bx lr
000000f0 <__errno>:
f0: 46c0 nop ; (mov r8, r8)
f2: 4770 bx lr
000000f4 <_isatty>:
f4: 2300 movs r3, #0
f6: 0018 movs r0, r3
f8: 4770 bx lr
fa: 46c0 nop ; (mov r8, r8)
000000fc <_fstat>:
fc: 2300 movs r3, #0
fe: 0018 movs r0, r3
100: 4770 bx lr
102: 46c0 nop ; (mov r8, r8)
00000104 <puts>:
104: b500 push {lr}
106: b085 sub sp, #20
108: 9001 str r0, [sp, #4]
10a: 2300 movs r3, #0
10c: 9303 str r3, [sp, #12]
10e: e009 b.n 124 <puts+0x20>
110: 9b03 ldr r3, [sp, #12]
112: 9a01 ldr r2, [sp, #4]
114: 18d3 adds r3, r2, r3
116: 781b ldrb r3, [r3, #0]
118: 0018 movs r0, r3
11a: f7ff ff9e bl 5a <putchar>
11e: 9b03 ldr r3, [sp, #12]
120: 3301 adds r3, #1
122: 9303 str r3, [sp, #12]
124: 9b03 ldr r3, [sp, #12]
126: 9a01 ldr r2, [sp, #4]
128: 18d3 adds r3, r2, r3
12a: 781b ldrb r3, [r3, #0]
12c: 2b00 cmp r3, #0
12e: d1ef bne.n 110 <puts+0xc>
130: 46c0 nop ; (mov r8, r8)
132: b005 add sp, #20
134: bd00 pop {pc}
136: 46c0 nop ; (mov r8, r8)
00000138 <rand>:
138: 2307 movs r3, #7
13a: 0018 movs r0, r3
13c: 4770 bx lr
13e: 46c0 nop ; (mov r8, r8)
00000140 <srand>:
140: 230b movs r3, #11
142: 0018 movs r0, r3
144: 4770 bx lr
146: 46c0 nop ; (mov r8, r8)
00000148 <_write>:
148: b500 push {lr}
14a: b087 sub sp, #28
14c: 9003 str r0, [sp, #12]
14e: 9102 str r1, [sp, #8]
150: 9201 str r2, [sp, #4]
152: 2300 movs r3, #0
154: 9305 str r3, [sp, #20]
156: e00a b.n 16e <_write+0x26>
158: 9b02 ldr r3, [sp, #8]
15a: 781b ldrb r3, [r3, #0]
15c: 0018 movs r0, r3
15e: f7ff ff7c bl 5a <putchar>
162: 9b02 ldr r3, [sp, #8]
164: 3301 adds r3, #1
166: 9302 str r3, [sp, #8]
168: 9b05 ldr r3, [sp, #20]
16a: 3301 adds r3, #1
16c: 9305 str r3, [sp, #20]
16e: 9a05 ldr r2, [sp, #20]
170: 9b01 ldr r3, [sp, #4]
172: 429a cmp r2, r3
174: dbf0 blt.n 158 <_write+0x10>
176: 9b05 ldr r3, [sp, #20]
178: 0018 movs r0, r3
17a: b007 add sp, #28
17c: bd00 pop {pc}
17e: 46c0 nop ; (mov r8, r8)
00000180 <_close>:
180: 46c0 nop ; (mov r8, r8)
182: 4770 bx lr
00000184 <_read>:
184: 46c0 nop ; (mov r8, r8)
186: 4770 bx lr
00000188 <_lseek>:
188: 46c0 nop ; (mov r8, r8)
18a: 4770 bx lr
0000018c <main>:
18c: b500 push {lr}
18e: b085 sub sp, #20
190: 4b06 ldr r3, [pc, #24] ; (1ac <main+0x20>)
192: 9303 str r3, [sp, #12]
194: 4b06 ldr r3, [pc, #24] ; (1b0 <main+0x24>)
196: 9302 str r3, [sp, #8]
198: 9902 ldr r1, [sp, #8]
19a: 9803 ldr r0, [sp, #12]
19c: f000 f80a bl 1b4 <__aeabi_fmul>
1a0: 1c03 adds r3, r0, #0
1a2: 9301 str r3, [sp, #4]
1a4: 2300 movs r3, #0
1a6: 0018 movs r0, r3
1a8: b005 add sp, #20
1aa: bd00 pop {pc}
1ac: 3fcccccd svccc 0x00cccccd
1b0: 400ccccd andmi ip, ip, sp, asr #25
000001b4 <__aeabi_fmul>:
1b4: b5f0 push {r4, r5, r6, r7, lr}
1b6: 4657 mov r7, sl
1b8: 464e mov r6, r9
1ba: 4645 mov r5, r8
1bc: 0043 lsls r3, r0, #1
1be: b4e0 push {r5, r6, r7}
1c0: 0246 lsls r6, r0, #9
1c2: 4688 mov r8, r1
1c4: 0a76 lsrs r6, r6, #9
1c6: 0e1f lsrs r7, r3, #24
1c8: 0fc4 lsrs r4, r0, #31
1ca: 2f00 cmp r7, #0
1cc: d047 beq.n 25e <__aeabi_fmul+0xaa>
1ce: 2fff cmp r7, #255 ; 0xff
1d0: d025 beq.n 21e <__aeabi_fmul+0x6a>
1d2: 2300 movs r3, #0
1d4: 2580 movs r5, #128 ; 0x80
1d6: 469a mov sl, r3
1d8: 4699 mov r9, r3
1da: 00f6 lsls r6, r6, #3
1dc: 04ed lsls r5, r5, #19
1de: 432e orrs r6, r5
1e0: 3f7f subs r7, #127 ; 0x7f
1e2: 4643 mov r3, r8
1e4: 4642 mov r2, r8
1e6: 025d lsls r5, r3, #9
1e8: 0fd2 lsrs r2, r2, #31
1ea: 005b lsls r3, r3, #1
1ec: 0a6d lsrs r5, r5, #9
1ee: 0e1b lsrs r3, r3, #24
1f0: 4690 mov r8, r2
1f2: d040 beq.n 276 <__aeabi_fmul+0xc2>
1f4: 2bff cmp r3, #255 ; 0xff
1f6: d039 beq.n 26c <__aeabi_fmul+0xb8>
1f8: 2280 movs r2, #128 ; 0x80
1fa: 2000 movs r0, #0
1fc: 00ed lsls r5, r5, #3
1fe: 04d2 lsls r2, r2, #19
200: 4315 orrs r5, r2
202: 3b7f subs r3, #127 ; 0x7f
204: 18fb adds r3, r7, r3
206: 4642 mov r2, r8
208: 4657 mov r7, sl
20a: 1c59 adds r1, r3, #1
20c: 4062 eors r2, r4
20e: 468c mov ip, r1
210: 4307 orrs r7, r0
212: 2f0f cmp r7, #15
214: d85c bhi.n 2d0 <__aeabi_fmul+0x11c>
216: 496f ldr r1, [pc, #444] ; (3d4 <__aeabi_fmul+0x220>)
218: 00bf lsls r7, r7, #2
21a: 59c9 ldr r1, [r1, r7]
21c: 468f mov pc, r1
21e: 2e00 cmp r6, #0
220: d145 bne.n 2ae <__aeabi_fmul+0xfa>
222: 2308 movs r3, #8
224: 469a mov sl, r3
226: 3b06 subs r3, #6
228: 4699 mov r9, r3
22a: e7da b.n 1e2 <__aeabi_fmul+0x2e>
22c: 4642 mov r2, r8
22e: 2802 cmp r0, #2
230: d02d beq.n 28e <__aeabi_fmul+0xda>
232: 2803 cmp r0, #3
234: d100 bne.n 238 <__aeabi_fmul+0x84>
236: e0c3 b.n 3c0 <__aeabi_fmul+0x20c>
238: 2801 cmp r0, #1
23a: d000 beq.n 23e <__aeabi_fmul+0x8a>
23c: e0a2 b.n 384 <__aeabi_fmul+0x1d0>
23e: 2500 movs r5, #0
240: 2600 movs r6, #0
242: 4002 ands r2, r0
244: b2d4 uxtb r4, r2
246: 0276 lsls r6, r6, #9
248: 05ed lsls r5, r5, #23
24a: 0a76 lsrs r6, r6, #9
24c: 432e orrs r6, r5
24e: 07e4 lsls r4, r4, #31
250: 4326 orrs r6, r4
252: 0030 movs r0, r6
254: bc1c pop {r2, r3, r4}
256: 4690 mov r8, r2
258: 4699 mov r9, r3
25a: 46a2 mov sl, r4
25c: bdf0 pop {r4, r5, r6, r7, pc}
25e: 2e00 cmp r6, #0
260: d11a bne.n 298 <__aeabi_fmul+0xe4>
262: 2304 movs r3, #4
264: 469a mov sl, r3
266: 3b03 subs r3, #3
268: 4699 mov r9, r3
26a: e7ba b.n 1e2 <__aeabi_fmul+0x2e>
26c: 002a movs r2, r5
26e: 1e51 subs r1, r2, #1
270: 418a sbcs r2, r1
272: 1c90 adds r0, r2, #2
274: e7c6 b.n 204 <__aeabi_fmul+0x50>
276: 2001 movs r0, #1
278: 2d00 cmp r5, #0
27a: d0c3 beq.n 204 <__aeabi_fmul+0x50>
27c: 0028 movs r0, r5
27e: f000 f8ad bl 3dc <__clzsi2>
282: 1f43 subs r3, r0, #5
284: 3076 adds r0, #118 ; 0x76
286: 409d lsls r5, r3
288: 4243 negs r3, r0
28a: 2000 movs r0, #0
28c: e7ba b.n 204 <__aeabi_fmul+0x50>
28e: 2401 movs r4, #1
290: 25ff movs r5, #255 ; 0xff
292: 4014 ands r4, r2
294: 2600 movs r6, #0
296: e7d6 b.n 246 <__aeabi_fmul+0x92>
298: 0030 movs r0, r6
29a: f000 f89f bl 3dc <__clzsi2>
29e: 1f43 subs r3, r0, #5
2a0: 409e lsls r6, r3
2a2: 2300 movs r3, #0
2a4: 3076 adds r0, #118 ; 0x76
2a6: 4247 negs r7, r0
2a8: 469a mov sl, r3
2aa: 4699 mov r9, r3
2ac: e799 b.n 1e2 <__aeabi_fmul+0x2e>
2ae: 230c movs r3, #12
2b0: 469a mov sl, r3
2b2: 3b09 subs r3, #9
2b4: 4699 mov r9, r3
2b6: e794 b.n 1e2 <__aeabi_fmul+0x2e>
2b8: 2680 movs r6, #128 ; 0x80
2ba: 2400 movs r4, #0
2bc: 03f6 lsls r6, r6, #15
2be: 25ff movs r5, #255 ; 0xff
2c0: e7c1 b.n 246 <__aeabi_fmul+0x92>
2c2: 0035 movs r5, r6
2c4: 4648 mov r0, r9
2c6: e7b2 b.n 22e <__aeabi_fmul+0x7a>
2c8: 0035 movs r5, r6
2ca: 0022 movs r2, r4
2cc: 4648 mov r0, r9
2ce: e7ae b.n 22e <__aeabi_fmul+0x7a>
2d0: 0429 lsls r1, r5, #16
2d2: 0c09 lsrs r1, r1, #16
2d4: 0008 movs r0, r1
2d6: 0c37 lsrs r7, r6, #16
2d8: 0436 lsls r6, r6, #16
2da: 0c36 lsrs r6, r6, #16
2dc: 0c2c lsrs r4, r5, #16
2de: 4379 muls r1, r7
2e0: 4370 muls r0, r6
2e2: 4367 muls r7, r4
2e4: 4374 muls r4, r6
2e6: 0c06 lsrs r6, r0, #16
2e8: 1864 adds r4, r4, r1
2ea: 1936 adds r6, r6, r4
2ec: 42b1 cmp r1, r6
2ee: d903 bls.n 2f8 <__aeabi_fmul+0x144>
2f0: 2180 movs r1, #128 ; 0x80
2f2: 0249 lsls r1, r1, #9
2f4: 4688 mov r8, r1
2f6: 4447 add r7, r8
2f8: 0400 lsls r0, r0, #16
2fa: 0c00 lsrs r0, r0, #16
2fc: 0431 lsls r1, r6, #16
2fe: 1809 adds r1, r1, r0
300: 018d lsls r5, r1, #6
302: 1e68 subs r0, r5, #1
304: 4185 sbcs r5, r0
306: 0e89 lsrs r1, r1, #26
308: 4329 orrs r1, r5
30a: 0c35 lsrs r5, r6, #16
30c: 19ed adds r5, r5, r7
30e: 01ad lsls r5, r5, #6
310: 430d orrs r5, r1
312: 0129 lsls r1, r5, #4
314: d504 bpl.n 320 <__aeabi_fmul+0x16c>
316: 2301 movs r3, #1
318: 0869 lsrs r1, r5, #1
31a: 401d ands r5, r3
31c: 4663 mov r3, ip
31e: 430d orrs r5, r1
320: 0019 movs r1, r3
322: 317f adds r1, #127 ; 0x7f
324: 2900 cmp r1, #0
326: dd25 ble.n 374 <__aeabi_fmul+0x1c0>
328: 0768 lsls r0, r5, #29
32a: d004 beq.n 336 <__aeabi_fmul+0x182>
32c: 200f movs r0, #15
32e: 4028 ands r0, r5
330: 2804 cmp r0, #4
332: d000 beq.n 336 <__aeabi_fmul+0x182>
334: 3504 adds r5, #4
336: 0128 lsls r0, r5, #4
338: d503 bpl.n 342 <__aeabi_fmul+0x18e>
33a: 4927 ldr r1, [pc, #156] ; (3d8 <__aeabi_fmul+0x224>)
33c: 3380 adds r3, #128 ; 0x80
33e: 400d ands r5, r1
340: 0019 movs r1, r3
342: 29fe cmp r1, #254 ; 0xfe
344: dca3 bgt.n 28e <__aeabi_fmul+0xda>
346: 2401 movs r4, #1
348: 01ad lsls r5, r5, #6
34a: 0a6e lsrs r6, r5, #9
34c: 4014 ands r4, r2
34e: b2cd uxtb r5, r1
350: e779 b.n 246 <__aeabi_fmul+0x92>
352: 2080 movs r0, #128 ; 0x80
354: 03c0 lsls r0, r0, #15
356: 4206 tst r6, r0
358: d007 beq.n 36a <__aeabi_fmul+0x1b6>
35a: 4205 tst r5, r0
35c: d105 bne.n 36a <__aeabi_fmul+0x1b6>
35e: 4328 orrs r0, r5
360: 0246 lsls r6, r0, #9
362: 0a76 lsrs r6, r6, #9
364: 4644 mov r4, r8
366: 25ff movs r5, #255 ; 0xff
368: e76d b.n 246 <__aeabi_fmul+0x92>
36a: 4306 orrs r6, r0
36c: 0276 lsls r6, r6, #9
36e: 0a76 lsrs r6, r6, #9
370: 25ff movs r5, #255 ; 0xff
372: e768 b.n 246 <__aeabi_fmul+0x92>
374: 2401 movs r4, #1
376: 1a61 subs r1, r4, r1
378: 291b cmp r1, #27
37a: dd05 ble.n 388 <__aeabi_fmul+0x1d4>
37c: 4014 ands r4, r2
37e: 2500 movs r5, #0
380: 2600 movs r6, #0
382: e760 b.n 246 <__aeabi_fmul+0x92>
384: 4663 mov r3, ip
386: e7cb b.n 320 <__aeabi_fmul+0x16c>
388: 002e movs r6, r5
38a: 2320 movs r3, #32
38c: 40ce lsrs r6, r1
38e: 1a59 subs r1, r3, r1
390: 408d lsls r5, r1
392: 1e6b subs r3, r5, #1
394: 419d sbcs r5, r3
396: 432e orrs r6, r5
398: 0773 lsls r3, r6, #29
39a: d004 beq.n 3a6 <__aeabi_fmul+0x1f2>
39c: 230f movs r3, #15
39e: 4033 ands r3, r6
3a0: 2b04 cmp r3, #4
3a2: d000 beq.n 3a6 <__aeabi_fmul+0x1f2>
3a4: 3604 adds r6, #4
3a6: 0173 lsls r3, r6, #5
3a8: d504 bpl.n 3b4 <__aeabi_fmul+0x200>
3aa: 2401 movs r4, #1
3ac: 2501 movs r5, #1
3ae: 4014 ands r4, r2
3b0: 2600 movs r6, #0
3b2: e748 b.n 246 <__aeabi_fmul+0x92>
3b4: 2401 movs r4, #1
3b6: 01b6 lsls r6, r6, #6
3b8: 0a76 lsrs r6, r6, #9
3ba: 4014 ands r4, r2
3bc: 2500 movs r5, #0
3be: e742 b.n 246 <__aeabi_fmul+0x92>
3c0: 2680 movs r6, #128 ; 0x80
3c2: 2401 movs r4, #1
3c4: 03f6 lsls r6, r6, #15
3c6: 432e orrs r6, r5
3c8: 0276 lsls r6, r6, #9
3ca: 0a76 lsrs r6, r6, #9
3cc: 4014 ands r4, r2
3ce: 25ff movs r5, #255 ; 0xff
3d0: e739 b.n 246 <__aeabi_fmul+0x92>
3d2: 46c0 nop ; (mov r8, r8)
3d4: 00000418 andeq r0, r0, r8, lsl r4
3d8: f7ffffff ; <UNDEFINED> instruction: 0xf7ffffff
000003dc <__clzsi2>:
3dc: 211c movs r1, #28
3de: 2301 movs r3, #1
3e0: 041b lsls r3, r3, #16
3e2: 4298 cmp r0, r3
3e4: d301 bcc.n 3ea <__clzsi2+0xe>
3e6: 0c00 lsrs r0, r0, #16
3e8: 3910 subs r1, #16
3ea: 0a1b lsrs r3, r3, #8
3ec: 4298 cmp r0, r3
3ee: d301 bcc.n 3f4 <__clzsi2+0x18>
3f0: 0a00 lsrs r0, r0, #8
3f2: 3908 subs r1, #8
3f4: 091b lsrs r3, r3, #4
3f6: 4298 cmp r0, r3
3f8: d301 bcc.n 3fe <__clzsi2+0x22>
3fa: 0900 lsrs r0, r0, #4
3fc: 3904 subs r1, #4
3fe: a202 add r2, pc, #8 ; (adr r2, 408 <__clzsi2+0x2c>)
400: 5c10 ldrb r0, [r2, r0]
402: 1840 adds r0, r0, r1
404: 4770 bx lr
406: 46c0 nop ; (mov r8, r8)
408: 02020304 andeq r0, r2, #4, 6 ; 0x10000000
40c: 01010101 tsteq r1, r1, lsl #2
...
Disassembly of section .rodata:
00000418 <.rodata>:
418: 000002d0 ldrdeq r0, [r0], -r0 ; <UNPREDICTABLE>
41c: 0000022e andeq r0, r0, lr, lsr #4
420: 0000022e andeq r0, r0, lr, lsr #4
424: 0000022c andeq r0, r0, ip, lsr #4
428: 000002c2 andeq r0, r0, r2, asr #5
42c: 000002c2 andeq r0, r0, r2, asr #5
430: 000002b8 ; <UNDEFINED> instruction: 0x000002b8
434: 0000022c andeq r0, r0, ip, lsr #4
438: 000002c2 andeq r0, r0, r2, asr #5
43c: 000002b8 ; <UNDEFINED> instruction: 0x000002b8
440: 000002c2 andeq r0, r0, r2, asr #5
444: 0000022c andeq r0, r0, ip, lsr #4
448: 000002c8 andeq r0, r0, r8, asr #5
44c: 000002c8 andeq r0, r0, r8, asr #5
450: 000002c8 andeq r0, r0, r8, asr #5
454: 00000352 andeq r0, r0, r2, asr r3
Disassembly of section .data:
00000458 <heapCurrent>:
458: 40000000 andmi r0, r0, r0
Disassembly of section .ARM.attributes:
00000000 <.ARM.attributes>:
0: 00002d41 andeq r2, r0, r1, asr #26
4: 61656100 cmnvs r5, r0, lsl #2
8: 01006962 tsteq r0, r2, ror #18
c: 00000023 andeq r0, r0, r3, lsr #32
10: 726f4305 rsbvc r4, pc, #335544320 ; 0x14000000
14: 2d786574 cfldr64cs mvdx6, [r8, #-464]! ; 0xfffffe30
18: 002b304d eoreq r3, fp, sp, asr #32
1c: 4d070c06 stcmi 12, cr0, [r7, #-24] ; 0xffffffe8
20: 04120109 ldreq r0, [r2], #-265 ; 0xfffffef7
24: 01150114 tsteq r5, r4, lsl r1
28: 01180317 tsteq r8, r7, lsl r3
2c: Address 0x0000002c is out of bounds.
Disassembly of section .comment:
00000000 <.comment>:
0: 3a434347 bcc 10d0d24 <heapCurrent+0x10d08cc>
4: 4e472820 cdpmi 8, 4, cr2, cr7, cr0, {1}
8: 6f542055 svcvs 0x00542055
c: 20736c6f rsbscs r6, r3, pc, ror #24
10: 20726f66 rsbscs r6, r2, r6, ror #30
14: 204d5241 subcs r5, sp, r1, asr #4
18: 65626d45 strbvs r6, [r2, #-3397]! ; 0xfffff2bb
1c: 64656464 strbtvs r6, [r5], #-1124 ; 0xfffffb9c
20: 6f725020 svcvs 0x00725020
24: 73736563 cmnvc r3, #415236096 ; 0x18c00000
28: 2973726f ldmdbcs r3!, {r0, r1, r2, r3, r5, r6, r9, ip, sp, lr}^
2c: 322e3520 eorcc r3, lr, #32, 10 ; 0x8000000
30: 3220312e eorcc r3, r0, #-2147483637 ; 0x8000000b
34: 31353130 teqcc r5, r0, lsr r1
38: 20323032 eorscs r3, r2, r2, lsr r0
3c: 6c657228 sfmvs f7, 2, [r5], #-160 ; 0xffffff60
40: 65736165 ldrbvs r6, [r3, #-357]! ; 0xfffffe9b
44: 415b2029 cmpmi fp, r9, lsr #32
48: 652f4d52 strvs r4, [pc, #-3410]! ; fffff2fe <_stacktop+0xbf7ff2fe>
4c: 6465626d strbtvs r6, [r5], #-621 ; 0xfffffd93
50: 2d646564 cfstr64cs mvdx6, [r4, #-400]! ; 0xfffffe70
54: 72622d35 rsbvc r2, r2, #3392 ; 0xd40
58: 68636e61 stmdavs r3!, {r0, r5, r6, r9, sl, fp, sp, lr}^
5c: 76657220 strbtvc r7, [r5], -r0, lsr #4
60: 6f697369 svcvs 0x00697369
64: 3332206e teqcc r2, #110 ; 0x6e
68: 38343831 ldmdacc r4!, {r0, r4, r5, fp, ip, sp}
6c: Address 0x0000006c is out of bounds.
Disassembly of section .debug_frame:
00000000 <.debug_frame>:
0: 0000000c andeq r0, r0, ip
4: ffffffff ; <UNDEFINED> instruction: 0xffffffff
8: 7c020001 stcvc 0, cr0, [r2], {1}
c: 000d0c0e andeq r0, sp, lr, lsl #24
10: 00000024 andeq r0, r0, r4, lsr #32
14: 00000000 andeq r0, r0, r0
18: 000001b4 ; <UNDEFINED> instruction: 0x000001b4
1c: 00000228 andeq r0, r0, r8, lsr #4
20: 84140e41 ldrhi r0, [r4], #-3649 ; 0xfffff1bf
24: 86048505 strhi r8, [r4], -r5, lsl #10
28: 8e028703 cdphi 7, 0, cr8, cr2, cr3, {0}
2c: 200e4501 andcs r4, lr, r1, lsl #10
30: 07890888 streq r0, [r9, r8, lsl #17]
34: 0000068a andeq r0, r0, sl, lsl #13
反汇编非工作代码：
test.elf: file format elf32-littlearm
Disassembly of section .text:
... (all the code from 0x0 to 0x40C are identical. I just created explicit labels within the last two functions to help me with what im trying to do!)
000003fe <twentynine>:
3fe: a202 add r2, pc, #8 ; (adr r2, 408 <twentynine+0xa>)
400: 5c10 ldrb r0, [r2, r0]
402: 1840 adds r0, r0, r1
404: 4770 bx lr
406: 46c0 nop ; (mov r8, r8)
408: 02020304 andeq r0, r2, #4, 6 ; 0x10000000
40c: 01010101 tsteq r1, r1, lsl #2
Disassembly of section .data:
00000410 <heapCurrent>:
410: 40000000 andmi r0, r0, r0
Disassembly of section .ARM.attributes:
00000000 <.ARM.attributes>:
0: 00002d41 andeq r2, r0, r1, asr #26
4: 61656100 cmnvs r5, r0, lsl #2
8: 01006962 tsteq r0, r2, ror #18
c: 00000023 andeq r0, r0, r3, lsr #32
10: 726f4305 rsbvc r4, pc, #335544320 ; 0x14000000
14: 2d786574 cfldr64cs mvdx6, [r8, #-464]! ; 0xfffffe30
18: 002b304d eoreq r3, fp, sp, asr #32
1c: 4d070c06 stcmi 12, cr0, [r7, #-24] ; 0xffffffe8
20: 04120109 ldreq r0, [r2], #-265 ; 0xfffffef7
24: 01150114 tsteq r5, r4, lsl r1
28: 01180317 tsteq r8, r7, lsl r3
2c: Address 0x0000002c is out of bounds.
Disassembly of section .comment:
00000000 <.comment>:
0: 3a434347 bcc 10d0d24 <heapCurrent+0x10d0914>
4: 4e472820 cdpmi 8, 4, cr2, cr7, cr0, {1}
8: 6f542055 svcvs 0x00542055
c: 20736c6f rsbscs r6, r3, pc, ror #24
10: 20726f66 rsbscs r6, r2, r6, ror #30
14: 204d5241 subcs r5, sp, r1, asr #4
18: 65626d45 strbvs r6, [r2, #-3397]! ; 0xfffff2bb
1c: 64656464 strbtvs r6, [r5], #-1124 ; 0xfffffb9c
20: 6f725020 svcvs 0x00725020
24: 73736563 cmnvc r3, #415236096 ; 0x18c00000
28: 2973726f ldmdbcs r3!, {r0, r1, r2, r3, r5, r6, r9, ip, sp, lr}^
2c: 322e3520 eorcc r3, lr, #32, 10 ; 0x8000000
30: 3220312e eorcc r3, r0, #-2147483637 ; 0x8000000b
34: 31353130 teqcc r5, r0, lsr r1
38: 20323032 eorscs r3, r2, r2, lsr r0
3c: 6c657228 sfmvs f7, 2, [r5], #-160 ; 0xffffff60
40: 65736165 ldrbvs r6, [r3, #-357]! ; 0xfffffe9b
44: 415b2029 cmpmi fp, r9, lsr #32
48: 652f4d52 strvs r4, [pc, #-3410]! ; fffff2fe <_stacktop+0xbf7ff2fe>
4c: 6465626d strbtvs r6, [r5], #-621 ; 0xfffffd93
50: 2d646564 cfstr64cs mvdx6, [r4, #-400]! ; 0xfffffe70
54: 72622d35 rsbvc r2, r2, #3392 ; 0xd40
58: 68636e61 stmdavs r3!, {r0, r5, r6, r9, sl, fp, sp, lr}^
5c: 76657220 strbtvc r7, [r5], -r0, lsr #4
60: 6f697369 svcvs 0x00697369
64: 3332206e teqcc r2, #110 ; 0x6e
68: 38343831 ldmdacc r4!, {r0, r4, r5, fp, ip, sp}
6c: Address 0x0000006c is out of bounds.