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From: Ruslan Ermilov <ru@FreeBSD.org>
Date: Sun, 29 Oct 2006 14:50:58 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
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Cc: 
Subject: cvs commit: src/sys/boot/common load_elf.c src/sys/boot/i386/boot2
 boot2.c src/sys/boot/i386/libi386 elf32_freebsd.c
 src/sys/boot/pc98/boot2 boot.c
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ru          2006-10-29 14:50:58 UTC

  FreeBSD src repository

  Modified files:
    sys/boot/common      load_elf.c 
    sys/boot/i386/boot2  boot2.c 
    sys/boot/i386/libi386 elf32_freebsd.c 
    sys/boot/pc98/boot2  boot.c 
  Log:
  Because the BTX mini-kernel now uses flat memory mode and clients
  are no longer limited to a virtual address space of 16 megabytes,
  only mask high two bits of a virtual address.  This allows to load
  larger kernels (up to 1 gigabyte).  Not masking addresses at all
  was a bad idea on machines with less than >3G of memory -- kernels
  are linked at 0xc0xxxxxx, and that would attempt to load a kernel
  at above 3G.  By masking only two highest bits we stay within the
  safe limits while still allowing to boot larger kernels.
  
  (This is a safer reimplmentation of sys/boot/i386/boot2/boot.2.c
  rev. 1.71.)
  
  Prodded by:     jhb
  Tested by:      nyan (pc98)
  
  Revision  Changes    Path
  1.35      +1 -1      src/sys/boot/common/load_elf.c
  1.82      +3 -3      src/sys/boot/i386/boot2/boot2.c
  1.16      +1 -1      src/sys/boot/i386/libi386/elf32_freebsd.c
  1.15      +2 -2      src/sys/boot/pc98/boot2/boot.c