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Date: Fri, 11 Apr 2008 11:32:10 +0200
From: Fabrice Bellard <fabrice@bellard.org>
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Subject: Re: [Qemu-devel] tcg_target_prologue()
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To: qemu-devel@nongnu.org

Stuart Brady wrote:
> Hi,
> 
> I recently tried using the C version of the TB call in cpu-exec.c,
> "T0 = gen_func();", with HPPA host support.  However, I must then save
> the link register, or else it would be overwritten... but if I use
> tcg_target_prologue(), I find that goto_tb sometimes jumps to the
> prologue, but it sometimes jumps past the prologue, instead!
> 
> I've fixed the bug[1] that caused me to investigate this, so for the
> time being, I'll continue calling TBs from inline assembly code, but it
> might be nice to spare others the pain of trying tcg_target_prologue()
> and failing.  Any thoughts?

The real fix is in the TCG TODO list (global prologue and epilogue). I 
will try to implement it ASAP.

Regards,

Fabrice.