On Fri, 25 May 2012, Greg KH wrote:

On Fri, May 25, 2012 at 08:44:43AM +0300, Jarkko Sakkinen wrote:

quoted

From: "H. Peter Anvin" <redacted>

A new option is added to the relocs tool called '--realmode'.
This option causes the generation of 16-bit segment relocations
and 32-bit linear relocations for the real-mode code. When
the real-mode code is moved to the low-memory during kernel
initialization, these relocation entries can be used to
relocate the code properly.

In the assembly code 16-bit segment relocations must be relative
to the 'real_mode_seg' absolute symbol. Linear relocations must be
relative to a symbol prefixed with 'pa_'.

16-bit segment relocation is used to load cs:ip in 16-bit code.
Linear relocations are used in the 32-bit code for relocatable
data references. They are declared in the linker script of the
real-mode code.

The relocs tool is moved to arch/x86/tools/relocs.c, and added new
target archscripts that can be used to build scripts needed building
an architecture.  be compiled before building the arch/x86 tree.

[ hpa: accelerating this because it detects invalid absolute
  relocations, a serious bug in binutils 2.22.52.0.x which currently
  produces bad kernels. ]

[ jsakkine: pulled tools/include/tools/le_byteshift.h in order
  to make this patch compile in 3.3 ]

Nope, your patch still doesn't apply, are you sure you sent me the
updated one?  It fails with:

patching file arch/x86/boot/compressed/Makefile
Hunk #1 succeeded at 40 (offset 1 line).
patching file arch/x86/boot/compressed/relocs.c
Hunk #1 FAILED at 1.
File arch/x86/boot/compressed/relocs.c is not empty after patch, as expected
1 out of 1 hunk FAILED -- rejects in file arch/x86/boot/compressed/relocs.c

when applying it to the 3.3-stable queue.

What did you generate it against?

Sent a new patch that is against 3.3.7.

thanks,

greg k-h

/Jarkko