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From: Andrew Gallatin <gallatin@FreeBSD.org>
Date: Mon, 16 Oct 2000 13:15:43 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/alpha/alpha exception.s src/sys/alpha/include
         asm.h
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gallatin    2000/10/16 13:15:43 PDT

  Modified files:
    sys/alpha/alpha      exception.s 
    sys/alpha/include    asm.h 
  Log:
  Fix problems booting large kernels on alphas.   The symptom is that the kernel
  loads, prints the copyright, and either hangs or locks solid.  The
  PC tends to be in the data segment and the RA is in XentMM
  
  Doug really came up with the fix, I'm just the monkey typing.  Doug says:
  	The alpha can only support 64k of globals with $gp pointing at
  	base+32k so that the code can use 16bit signed offsets from $gp to
  	access it. ....  it is possible to have multiple .got subsections
  	and the linker handles this with the relocations for 'ldgp' pseudo
  	instructions.  [Without this patch] the code in exception.s has been
  	linked  to use a different gp from locore.s (where pal_kgp is set).
  
  Reviewed by: dfr
  
  Revision  Changes    Path
  1.4       +5 -1      src/sys/alpha/alpha/exception.s
  1.8       +5 -2      src/sys/alpha/include/asm.h



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