[lkml]   [2008]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCHv3 1/3] x86: use ELF format in compressed images.
    On Thu, 2008-02-14 at 17:01 +0000, Ian Campbell wrote:
    > On Thu, 2008-02-14 at 11:34 +0000, Mark McLoughlin wrote:
    > > On Wed, 2008-02-13 at 20:54 +0000, Ian Campbell wrote:
    > > > This allows other boot loaders such as the Xen domain builder the
    > > > opportunity to extract the ELF file.
    > >
    > > Right, Xen currently can't boot bzImage (it needs the ELF image) so you
    > > still can't use the same kernel image on Xen as bare-metal.
    > I have a xen domain builder patch as well. I was waiting for the Linux
    > side to gain some traction before putting it forward (I'd attach it now
    > but it's at home on a laptop which is sleeping).

    Yep, just want to highlight to people that your patches (or an
    alternative) are needed before the same pv_ops kernel truly can be used
    on bare-metal and Xen.

    > > How about this?
    > >
    > > +sed-offsets := -e 's/^00*/0/' \
    > > + -e 's/^\([0-9a-fA-F]*\) . \(input_data\|input_data_end\)$$/-D\2=0x\1 /p'
    > > +
    > > +$(obj)/header.o: AFLAGS_header.o += $(shell $(NM) $(obj)/compressed/vmlinux | sed -n $(sed-offsets))
    > > +$(obj)/header.o: $(obj)/compressed/vmlinux FORCE
    > That's probably a neater way of doing it. Although the ".../header.o:
    > AFLAGS_header.o" is redundant, either
    > header.o: AFLAGS += foo

    With this, AFLAGS would apply to building when building the
    prerequisites of header.o too, which you don't want

    The make manual says:

    "when you define a target-specific variable that variable value is
    also in effect for all prerequisites of this target, and all their

    > or
    > AFLAGS_header.o += foo
    > with the second being preferred in Linux Makefiles I think.

    And with this, it would try and read vmlinux before it is built.

    But, hmm, given the fact that the variable is defined when building
    prerequisites, you'd think that even in my version AFLAGS would be
    evaluated before building vmlinux.


     \ /
      Last update: 2008-02-14 18:41    [W:0.022 / U:6.612 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site