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Re: [PATCH]: Remove CONFIG_BUILD_ELF64 entirely

To: Atsushi Nemoto <>
Subject: Re: [PATCH]: Remove CONFIG_BUILD_ELF64 entirely
From: Kumba <>
Date: Wed, 28 Mar 2007 21:50:28 -0400
In-reply-to: <>
Original-recipient: rfc822;
References: <> <> <> <>
User-agent: Thunderbird 2.0b2 (Windows/20070116)
Atsushi Nemoto wrote:
Just an optimization.  For CKSEG0 symbol, a LUI instruction can fill
high 32-bit by sign-extention.  Either code should work for CKSEG0

Hmm, strange then. It's gotta be something those four extra commands do that IP32 likes. IP22 boots fine with either form, though that has a separate problem where it looks like serial console on the zilog chip panics the system after booting into a netboot.

Doing some tests, I found out that by commenting out one or more of the daddui/dsll instructions for IP32 produced a kernel that still booted, but hung at running init/freeing kernel memory. Using the single lui booted once, but I suspect that was my fault on not doing something proper, cause the next time around, it didn't boot at all. I tested this all on a real console, versus serial, case there was an early panic or something. But I see nothing to indicate why IP32 dislikes the lui->ld sequence versus the lui->daddui->dsll->etc->ld sequence.

There's no early printk on these systems either, so doing low-level debugging is difficult on them as well.


Gentoo/MIPS Team Lead

"Such is oft the course of deeds that move the wheels of the world: small hands do them because they must, while the eyes of the great are elsewhere." --Elrond

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