[Vm-dev] 64-bit stack vm: Help needed: we need quick implementation for those symbols on x64 platform

[Eliot Miranda]

On Tue, Aug 28, 2012 at 3:05 PM, Igor Stasenko <siguctua at gmail.com> wrote:

>
> Thanks, Eliot.
> Guillermo started working on that thing, and i really hope with our
> help he will manage to do it.
> And then once we will have 64-bit stack VM working, it will open a
> straight road to 64-bit jit implementation.
>

Right, cool.  But remember one can (and should) develop the code generator
in Smalltalk/VMMaker above a BochsIA64Plugin, which should be
straight-forward to derive from Bochs by configuring it for IA64/x86-64.
 Good luck!

>
>
> On 28 August 2012 20:44, Eliot Miranda <eliot.miranda at gmail.com> wrote:
> >
> >
> >
> > On Tue, Aug 28, 2012 at 8:47 AM, Guillermo Polito <
> guillermopolito at gmail.com> wrote:
> >>
> >>
> >> the rest is COMPILED
> >> this is the only thing which prevents from linking StackVM and getting
> a binary on Mac OSX.
> >> Since x86 are similar to x64. i expect this can be done without much
> changes in assembler code.
> >>
> >> Please help/advice.
> >>
> >> Undefined symbols for architecture x86_64:
> >>   "_sqLowLevelMFence", referenced from:
> >>       _forceInterruptCheck in gcc3x-interp.c.o
> >>       _primitiveLongRunningPrimitiveSemaphore in gcc3x-interp.c.o
> >>       _markAndTraceInterpreterOops in gcc3x-interp.c.o
> >>       _primitiveDoPrimitiveWithArgs in gcc3x-interp.c.o
> >>       _beRootIfOld in gcc3x-interp.c.o
> >>       _updatePointersInRangeFromto in gcc3x-interp.c.o
> >>       _setInterruptPending in gcc3x-interp.c.o
> >>       ...
> >>   "_sqCompareAndSwapRes", referenced from:
> >>       _signalSemaphoreWithIndex in sqExternalSemaphores.c.o
> >
> >
> > this line in platforms/Cross/vm/sqMemoryFence.h should work fine:
> >
> >  #   define sqLowLevelMFence() asm volatile ("mfence")
> >
> >> ld: symbol(s) not found for architecture x86_64
> >> collect2: ld returned 1 exit status
> >> make[2]: ***
> [/Users/guillermopolito/Pharo/vm/self-compiled/blessed/results/StackVM.app/Contents/MacOS/StackVM]
> Error 1
> >> make[1]: *** [CMakeFiles/StackVM.dir/all] Error 2
> >> make: *** [all] Error 2
> >>
> >
> > again the macro definitions in platforms/Cross/vm/sqAtomicOps.h shoild
> be fine:
> >
> > # define sqCompareAndSwap(var,old,new) \
> >     asm volatile ("movl %1, %%eax; lock cmpxchg %2, %0" \
> >                     : "=m"(var) \
> >                     : "g"(old), "r"(new), "m"(var)\
> >                     : "memory", "%eax")
> >
> > # define sqCompareAndSwapRes(var,old,new,res) \
> >     asm volatile ("movl %2, %%eax; lock cmpxchg %3, %0; movl %%eax, %1" \
> >                     : "=m"(var), "=g"(res) \
> >                     : "g"(old), "r"(new), "m"(var) \
> >                     : "memory", "%eax")
> >
> > All you have to do is take these definitions and add them in a separate
> arm for x86-64, e.g.
> >
> > #if defined(__GNUC__) && (defined(i386) || defined(__i386) ||
> defined(__i386__) || defined(_X86_))
> > ....existing definitions...
> > #else
> > ...
> >
> > becomes
> >
> > #if defined(__GNUC__)
> > #   if defined(i386) || defined(__i386) || defined(__i386__) ||
> defined(_X86_))
> > ....existing definitions...
> > #   elif defined(x64) /* or whatever else x86-64 is called */
> > ....copy of x86 definitions that use assembler (i.e. *not*  asm volatile
> (".byte 0x0f;.byte 0xae;.byte 0xf0")) ...
> > #   endif
> > #else
> > ...
> >
> >
> > --
> > best,
> > Eliot
> >
> >
>
>
>
> --
> Best regards,
> Igor Stasenko.
>



-- 
best,
Eliot
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