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From: Matt Dillon <dillon@FreeBSD.ORG>
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Date: Thu, 4 Feb 1999 23:49:29 -0800 (PST)
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To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject: cvs commit: src/sys/vm vm_unix.c
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dillon      1999/02/04 23:49:29 PST

  Modified files:
    sys/vm               vm_unix.c 
  Log:
      The elf loader sets the permissions on bss to VM_PROT_READ|VM_PROT_WRITE
      rather then VM_PROT_ALL.  obreak, on the otherhand, uses VM_PROT_ALL.
      This prevents vm_map_insert() from being able to coalesce the heap and
      creates an extra map entry.  Since current architectures ignore
      VM_PROT_EXECUTE anyway, and since not having VM_PROT_EXECUTE on data/bss
      may provide protection in the future, obreak now uses read+write rather
      then all (r+w+x).
  
      This is an optimization, not a bug fix.
  
  Submitted by:	Alan Cox <alc@cs.rice.edu>
  
  Revision  Changes    Path
  1.18      +2 -2      src/sys/vm/vm_unix.c

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