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Date: Wed, 5 Dec 2007 23:36:42 +0200
From: "Blue Swirl" <blauwirbel@gmail.com>
Subject: Re: [Qemu-devel] and now bus error for i386 guest
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To: qemu-devel@nongnu.org

On 12/5/07, Shaddy Baddah <shaddy.baddah@shaddybaddah.name> wrote:
> 0x1e958 <main+13992>:   ld  [ %l6 + 0x8c ], %l1
> 0x1e95c <main+13996>:   call  0xa90b4 <cpu_x86_exec>
> 0x1e960 <main+14000>:   mov  %l1, %o0

Maybe you missed the effect of the delay slot. The first argument is
prepared in %l1 and moved to %o0 in the delay slot of the call
instruction.

> 0x240a4 <main_loop+152>:        sethi  %hi(0x258800), %g4
> 0x240a8 <main_loop+156>:        or  %g4, 0x4c, %g4      ! 0x25884c
> 0x240ac <main_loop+160>:        ld  [ %g4 ], %g4
> 0x240b0 <main_loop+164>:        st  %g4, [ %fp + -20 ]
> 0x240b4 <main_loop+168>:        ld  [ %fp + -20 ], %o0
> 0x240b8 <main_loop+172>:        call  0x14fa64 <cpu_x86_exec>
> 0x240bc <main_loop+176>:        nop

This looks like equivalent code, only dumber version using an
intermediate store and not using the delay slot.