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<head>
<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - MC ARM disassembler does not support all instructions"
href="https://llvm.org/bugs/show_bug.cgi?id=30525">30525</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>MC ARM disassembler does not support all instructions
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: ARM
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>yyc1992@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Disassemble the following asm with llvm-objdump (note that this is not a valid
program, I'm just putting instructions that causes trouble in their own symbol
to workaround <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [arm disassembler] Disassembler can't read llvm created object"
href="show_bug.cgi?id=15795">https://llvm.org/bugs/show_bug.cgi?id=15795</a>)
```
.text
f1:
movw r5, #31860
f2:
movt r5, #63337
f3:
blx r0
f4:
bx lr
```
output of `llvm-objdump`
```
f1:
554: 74 <unknown>
555: 5c 07 e3 69 stmibvs r3!, {r2, r3, r4, r6, r8, r9, r10} ^
f2:
558: 69 <unknown>
559: 57 4f e3 30 rsclo r4, r3, r7, asr pc
f3:
55c: 30 <unknown>
55d: ff 2f e1 1e mcrne p15, #7, r2, c1, c15, #7
f4:
560: 1e <unknown>
561: ff 2f e1 1e mcrne p15, #7, r2, c1, c15, #7
f5:
564: 1e <unknown>
565: ff 2f 01 1e mcrne p15, #0, r2, c1, c15, #7
f6:
568: 1e <unknown>
569: ff 2f 91 1e mrcne p15, #4, r2, c1, c15, #7
f7:
56c: 1e <unknown>
56d: ff <unknown>
56e: 2f <unknown>
56f: 11 <unknown>
```
Interestingly, the first 4 instructions are actually picked from the
instructions llvm JIT generates.</pre>
</div>
</p>
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