PAGE Size change on MIPS

PAGE Size change on MIPS

[naveen yadav]

Hi All,

I want to change page size in kernel. shall I need to change in
binutils the following values. How can i check what the max page size
a particular
toolchain support.

./binutils-stable/bfd/elfn32-mips.c

#define ELF_MAXPAGESIZE                 0x10000
#define ELF_COMMONPAGESIZE              0x1000


Thanks

Re: PAGE Size change on MIPS

[Nick Clifton]

Hi Naveen,

> I want to change page size in kernel. shall I need to change in
> binutils the following values.

Yes.

> How can i check what the max page size a particular
> toolchain support.

By looking at the code in the target specific files in the bfd library. 
  The max page size can in theory be set to any number you like, but 
obviously the intention is that it matches the maximum page size 
supported by the runtime system where the built binaries will be executing.

If you need to find out the max page size for an installed toolchain to 
which you do not have the sources you can use this technique:

   % touch empty.s
   % as empty.s -o empty.o
   % cat > pagesize.t
   SECTIONS
   {
         .foo :
         {
                 LONG (CONSTANT(MAXPAGESIZE)) ;
         }
   }

   % ld -T pagesize.t empty.o
   % objdump -Dz a.out
   00000000 <.foo>:
    0:   00 10                   add    %dl,(%eax)
    2:   00 00                   add    %al,(%eax)

Voila, the max page size for this particular target is 0x1000.

Cheers
   Nick