[LLVMdev] LLVM disassembler bugs

[James Courtier-Dutton]

Test case attached. It is not a test case that works within the llvm
test-suite yet, but it does demonstrate the problem.
I would like some advice on how to modify this test_case so that it can be
added to the automated llvm test cases.



On 15 September 2013 23:02, David Majnemer <david.majnemer at gmail.com> wrote:

> The attached patch includes no test-case and isn't consistent with the
> rest of the file:
> - constants should be on the right hand side of comparisons
> - the braces around your single line 'if' aren't needed.
>
>
>
> On Sun, Sep 15, 2013 at 2:39 PM, James Courtier-Dutton <
> james.dutton at gmail.com> wrote:
>
>> I attach a patch that fixes this bug. Applies to llvm 3.4svn
>>
>> Please commit it please.
>>
>> Kind Regards
>>
>> James
>>
>>
>>
>>
>> On 13 September 2013 17:46, James Courtier-Dutton <james.dutton at gmail.com
>> > wrote:
>>
>>> Hi,
>>>
>>> I am looking at the "LLVMOpInfoCallback GetOpInfo" callback.
>>>
>>> Example 1 GOOD:
>>> 41 c6 84 24 16 04 00 00 0c :      movb    $12, 1046(%r12)
>>>
>>> Makes calls to the callback with:
>>> Offset = 0x4, Size = 0x4 <- Octets: 16 04 00 00
>>> Offset = 0x8, Size = 0x1 <- Octets: 0c
>>> That was correct.
>>>
>>> Example 2 BAD:
>>> c7 45 98 a1 ff ff ff :    movl    $4294967201, -104(%rbp)
>>> Makes calls to the callback with:
>>> Offset = 0x2, Size = 0x4 <- Octets: 98 a1 ff ff
>>> Offset = 0x3, Size = 0x4 <- Octets: a1 ff ff ff
>>> That is wrong.
>>> The callbacks should be:
>>> Offset = 0x2, Size = 0x1   <- Octets: 98
>>> Offset = 0x3, Size = 0x4   <- Octets: a1 ff ff ff
>>>
>>> Is this a know bug?
>>>
>>> Kind Regards
>>>
>>> James
>>>
>>>
>>
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>>
>>
>
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