target/linux/uml/patches-2.6.32/004-fix_text_section.patch

   1 um: remove PAGE_SIZE alignment in linker script causing kernel segfault.
   2
   3 The linker script cleanup that I did in commit
   4 5d150a97f9391f5bcd7ba0d59d7a11c3de3cea80 accidentally introduced an
   5 ALIGN(PAGE_SIZE) when converting to use INIT_TEXT_SECTION; Richard
   6 Weinberger reported that this causes the kernel to segfault with
   7 CONFIG_STATIC_LINK=y.
   8
   9 I'm not certain why this extra alignment is a problem, but it seems likely
  10 it is because previously
  11
  12 __init_begin = _stext = _text = _sinittext
  13
  14 and with the extra ALIGN(PAGE_SIZE), _sinittext becomes different from the
  15 rest.  So there is likely a bug here where something is assuming that
  16 _sinittext is the same as one of those other symbols.  But reverting the
  17 accidental change fixes the regression, so it seems worth committing that
  18 now.
  19
  20 Signed-off-by: Tim Abbott <tabbott@ksplice.com>
  21 Reported-by: richard -rw- weinberger <richard.weinberger@gmail.com>
  22 Cc: Jeff Dike <jdike@addtoit.com>
  23 Cc: user-mode-linux-devel@lists.sourceforge.net
  24 ---
  25  arch/um/kernel/uml.lds.S |    2 +-
  26  1 files changed, 1 insertions(+), 1 deletions(-)
  27
  28 --- a/arch/um/kernel/uml.lds.S
  29 +++ b/arch/um/kernel/uml.lds.S
  30 @@ -22,7 +22,7 @@ SECTIONS
  31    _text = .;
  32    _stext = .;
  33    __init_begin = .;
  34 -  INIT_TEXT_SECTION(PAGE_SIZE)
  35 +  INIT_TEXT_SECTION(0)
  36    . = ALIGN(PAGE_SIZE);
  37
  38    .text      :