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Date: Thu, 20 Mar 2008 22:38:20 -0700
From: David Barrett <dbarrett@quinthar.com>
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Subject: Re: [Qemu-devel] Can't compile on whacky 2.6/2.4 hybrid
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To: Blue Swirl <blauwirbel@gmail.com>
Cc: qemu-devel@nongnu.org

Blue Swirl wrote:
> On 3/17/08, David Barrett <dbarrett@quinthar.com> wrote:
>> To be clear, I'm not at all surprised this doesn't compile on my server.
>>   I have a custom 2.6 kernel injected into a 2.4 distribution running a
>>  bunch of ancient libraries and -- *gasp* -- I'm having trouble
>>  compiling.  (As you might guess, this isn't by choice.)  I don't
>>  honestly expect to get this to work, but on the off chance that it's
>>  obvious to somebody, can you suggest any way to get past this compile error?
> 
> Could you test the attached patch? It's not a real fix, but I'm trying
> to find the range of instructions that need to be converted to TCG. If
> the compile fails, please report the error message.

Well, it gets a lot further now, and compilation stops here:

In file included from /tmp/qemu-0.9.1/target-sparc/op.c:123:
/tmp/qemu-0.9.1/target-sparc/fop_template.h: In function 
`op_load_fpr_QT0_fprf0':
/tmp/qemu-0.9.1/target-sparc/fop_template.h:91: Unable to find a 
register to spill in class `SIREG'.
/tmp/qemu-0.9.1/target-sparc/fop_template.h:91: This is the insn:
(insn 35 34 36 (parallel[
             (set (reg:SI 2 ecx [49])
                 (const_int 0 [0x0]))
             (set (reg/f:SI 1 edx [47])
                 (plus:SI (ashift:SI (reg:SI 2 ecx [49])
                         (const_int 2 [0x2]))
                     (reg/f:SI 1 edx [47])))
             (set (reg/f:SI 0 eax [48])
                 (plus:SI (ashift:SI (reg:SI 2 ecx [49])
                         (const_int 2 [0x2]))
                     (reg/f:SI 0 eax [48])))
             (set (mem/s:BLK (reg/f:SI 1 edx [47]) 0)
                 (mem/s:BLK (reg/f:SI 0 eax [48]) 0))
             (use (reg:SI 2 ecx [49]))
             (use (reg:SI 19 dirflag))
         ] ) 394 {rep_movsi} (insn_list 29 (insn_list 31 (insn_list 32 
(insn_list 34 (nil)))))
     (expr_list:REG_DEAD (reg:SI 19 dirflag)
         (expr_list:REG_UNUSED (reg:SI 2 ecx [49])
             (expr_list:REG_UNUSED (reg/f:SI 1 edx [47])
                 (expr_list:REG_UNUSED (reg/f:SI 0 eax [48])
                     (nil))))))
/tmp/qemu-0.9.1/target-sparc/fop_template.h:91: confused by earlier 
errors, bailing out

-david