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From: David Xu <davidxu@FreeBSD.org>
Date: Wed, 30 Jul 2003 19:11:04 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
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Subject: cvs commit: src/sys/i386/i386 sys_machdep.c
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davidxu     2003/07/30 19:11:04 PDT

  FreeBSD src repository

  Modified files:
    sys/i386/i386        sys_machdep.c 
  Log:
  Enhance i386_set_ldt to allow application to dynamic allocate
  or free a LDT entry. The function has following prototype:
    int i386_set_ldt(int start_sel, union descriptor *descs, int num_sels);
  
  Added Features:
  o If start_sel is 0, num_sels is 1 and the descriptor pointed to by descs
    is legal, then i386_set_ldt() will allocate a descriptor and return its
    selector numbe
  
  o If num_descs is 1, start_sels is valid, and descs is NULL, then
    i386_set_ldt() will free that descriptor (making it available to be real-
    located again later).
  
  o If num_descs is 0, start_sels is 0 and descs is NULL then, as a special
    case, i386_set_ldt() will free all descriptors.
  
  Reviewed by: julian
  
  Revision  Changes    Path
  1.85      +167 -56   src/sys/i386/i386/sys_machdep.c