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Re: CVS commit: src/sys/arch
On Wed, Jan 15, 2014 at 10:24:41PM +0000, Joerg Sonnenberger wrote:
> Module Name: src
> Committed By: joerg
> Date: Wed Jan 15 22:24:41 UTC 2014
> Modified Files:
> src/sys/arch/amd64/acpi: acpi_wakecode.S
> src/sys/arch/amd64/amd64: mptramp.S
> src/sys/arch/i386/i386: mptramp.S
> Log Message:
> LLVM doesn't support data32/addr32, but is smart enough to figure the
> necessary prefixes out.
What justification does LLVM have for instering the prefixes
inside a .code16 section?
data32 addr32 lgdt (gdt_desc)
Nothing tells if the format of the descriptor - and it changes
between true 16bit mode and 32bit mode (which we want).
I'm not sure the addr32 is needed - since it is the operand size
that controls whether a 24 or 32 bit base is loaded.
I've certainly used lidt in real mode just to move the vector
table to a safe address (the 286 ice didn't like it).
David Laight: david%l8s.co.uk@localhost
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