From owner-freebsd-hackers Fri Oct 12 11: 6:37 2001
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Date: Fri, 12 Oct 2001 11:05:56 -0700 (PDT)
From: Matt Dillon <dillon@earth.backplane.com>
Message-Id: <200110121805.f9CI5uY34981@earth.backplane.com>
To: Julian Elischer <julian@elischer.org>
Cc: hackers@FreeBSD.ORG, developers@FreeBSD.ORG
Subject: Re: Patch to allow 4.2 driver .o to run on 4.4
References: <Pine.BSF.4.21.0110111604380.37124-100000@InterJet.elischer.org>
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:Sorry about the crosspost but I estimate that this reaches those who need
:to see this..
:
:There was a change in the 4.x kernel.h on June 15 that broke backwards
:compatibility for binary distributed driver files
:(distributed as .o files) It was an MFC of a patch by peter..
:but we didn't understand the ramifications in 4.x.
This seems very reasonable to me... a nice quick and easy solution.
-Matt
:my fix (a reversion in part) is as follows:
:
:Index: kernel.h
:===================================================================
:RCS file: /repos/cvs/mod/freebsd/src/sys/sys/kernel.h,v
:retrieving revision 1.63.2.5
:diff -u -r1.63.2.5 kernel.h
:--- kernel.h 2001/07/26 23:27:53 1.63.2.5
:+++ kernel.h 2001/10/11 21:30:03
:@@ -113,13 +113,13 @@
: SI_SUB_VM = 0x1000000, /* virtual memory system
:init*/
: SI_SUB_KMEM = 0x1800000, /* kernel memory*/
: SI_SUB_KVM_RSRC = 0x1A00000, /* kvm operational
:limits*/
:- SI_SUB_CPU = 0x2000000, /* CPU resource(s)*/
:- SI_SUB_KLD = 0x2100000, /* KLD and module setup */
:...
:
:The result of this was that old .o drivers are initialise at sequence
:0x2400000 but the device framework is not initialised until 0x3100000.
:
:my patch shifts all the numbers back to below that that binary
:...
:Julian
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