cvs commit: src/sys/kern link_elf.c

[Peter Wemm]

peter       2005-10-17 23:21:55 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             link_elf.c 
  Log:
  Add support for kernel modules with a single PT_LOAD section.
  
  While here, support up to four sections because it was trivial to do
  and cheap. (One pointer per section).
  
  For amd64 with "-fpic -shared" format .ko files, using a single PT_LOAD
  section is important to avoid wasting about 1MB of KVM and physical ram
  for the 'gap' between the two PT_LOAD sections.  amd64 normally uses
  .o format kld files and isn't affected normally.  But -fpic -shared modules
  are actually possible to produce and load...  (And with a bugfix to
  binutils, we can build and use plain -shared .ko files without -fpic)
  
  i386 only wastes 4K per .ko file, so that isn't such a big deal there.
  
  Revision  Changes    Path
  1.85      +9 -6      src/sys/kern/link_elf.c