[LLVMdev] problems with dwarf/gdb

Dale Johannesen dalej at apple.com
Mon Apr 20 17:18:47 PDT 2009


On Apr 20, 2009, at 5:06 PMPDT, Ken McMillan wrote:

>
> Well...
>
> $ ~/software/llvm-gcc4.2-2.5-x86-linux-RHEL4/bin/llvm-gcc -g gdb1.c - 
> o gdb1
> /tmp/ccbAj8x9.s: Assembler messages:
> /tmp/ccbAj8x9.s:35: Error: suffix or operands invalid for `push'
> /tmp/ccbAj8x9.s:44: Error: suffix or operands invalid for `pop'
> /tmp/ccbAj8x9.s:56: Error: suffix or operands invalid for `push'
> /tmp/ccbAj8x9.s:65: Error: suffix or operands invalid for `pop'
> /tmp/ccbAj8x9.s:77: Error: suffix or operands invalid for `push'
> /tmp/ccbAj8x9.s:94: Error: suffix or operands invalid for `pop'
>
> Don't know what that's about. If I use the -S option and then
> compile the .s file with gcc, it works fine (but again, can't set
> breakpoints in gdb).

This means your llvm-gcc is producing 64-bit code and invoking the  
assembler with a 32-bit option, or vice versa.  Run gcc -v to see the  
option you need to pass.  Other people have reported this, I don't  
recall how it is fixed (doesn't affect my system).

> I am currently using gdb 6.6. Will try 6.8...
>
> Thanks -- Ken
>
>
>
> Argiris Kirtzidis wrote:
>>
>> Ken McMillan wrote:
>>> I see. Here's another interesting issue:
>>>
>>> (gdb) b gdb1.c:4
>>> No line 4 in file "gdb1.c".
>>> (gdb) step
>>> foo () at /home/mcmillan/projects/impact2/test//gdb1.c:4
>>> 4	  x++;
>>> (gdb)
>>>
>>> You can see that I can step to line 4, but I can't set a breakpoint
>>> there.
>>>
>>
>> Works fine here (llvm 2.5, 32 bit, gdb 6.8)
>>
>> Try
>>
>> llc -disable-fp-elim -fast gdb1.bc
>>
>> If you do
>> llvm-gcc -g gdb1.c -o gdb1
>>
>> does it have the same issue ?
>>
>>
>> -Argiris
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>>
>>
>
> -- 
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>
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