From: Daniel Kiper <daniel.kiper@oracle.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: jgross@suse.com, grub-devel@gnu.org, eric.snowberg@oracle.com,
arvidjaar@gmail.com, phcoder@gmail.com, seth.goldberg@oracle.com,
xen-devel@lists.xenproject.org
Subject: Re: [MULTIBOOT2 DOC PATCH 06/10] multiboot2: Add description of support for relocatable images
Date: Fri, 10 Jun 2016 19:36:34 +0200 [thread overview]
Message-ID: <20160610173634.GE5490__28089.6125980236$1465580457$gmane$org@olila.local.net-space.pl> (raw)
In-Reply-To: <33053e4b-2c66-dc4f-6e5a-bfcb05bde590@citrix.com>
On Thu, Jun 09, 2016 at 10:36:29PM +0100, Andrew Cooper wrote:
> On 09/06/2016 21:30, Daniel Kiper wrote:
> > Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
> > ---
> > doc/multiboot.texi | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++
> > doc/multiboot2.h | 24 ++++++++++++++++++++++
> > 2 files changed, 80 insertions(+)
> >
> > diff --git a/doc/multiboot.texi b/doc/multiboot.texi
> > index 130176a..f1e0e09 100644
> > --- a/doc/multiboot.texi
> > +++ b/doc/multiboot.texi
> > @@ -359,6 +359,7 @@ executable header.
> > * Console header tags::
> > * Module alignment tag::
> > * EFI boot services tag::
> > +* Relocatable header tag::
> >
> > @end menu
> >
> > @@ -681,6 +682,47 @@ u32 | size = 8 |
> > This tag indicates that payload supports starting without
> > terminating boot services.
> >
> > +@node Relocatable header tag
> > +@subsection Relocatable header tag
> > +
> > +@example
> > +@group
> > + +-------------------+
> > +u16 | type = 10 |
> > +u16 | flags |
> > +u32 | size = 24 |
> > +u32 | min_addr |
> > +u32 | max_addr |
> > +u32 | align |
> > +u32 | preference |
> > + +-------------------+
> > +@end group
> > +@end example
> > +
> > +This tag indicates that image is relocatable.
> > +
> > +The meaning of each field is as follows:
> > +
> > +@table @code
> > +@item min_addr
> > +Lowest possible physical address at which image should be loaded.
> > +Boot loader cannot load any part of image below this address.
>
> "The bootloader".
This and earlier comments show, what I know very well, that a/the
English stuff is huge pain for me. Ehh... It looks that I should
not update any docs... ;-))) Anyway, thank you for your comments!
[...]
> > +struct multiboot_header_tag_relocatable
> > +{
> > + multiboot_uint16_t type;
> > + multiboot_uint16_t flags;
> > + multiboot_uint32_t size;
> > + multiboot_uint32_t min_addr;
> > + multiboot_uint32_t max_addr;
>
> 64bit multiboot2 payloads could reasonably expect to be able to have
> themselves relocated about the 4G boundary.
That is true but in general the multiboot2 protocol is 32-bit stuff.
So, I prefer to stay in 32-bit domain. Just in case. If we need to use
full blown 64-bit thing then, IMO, we should introduce new protocol
(e.g. multiboot3) with full 64-bit support, probably compatible with
32-bit stuff to some extent.
Daniel
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next prev parent reply other threads:[~2016-06-10 17:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1465504244-17175-1-git-send-email-daniel.kiper@oracle.com>
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 01/10] multiboot2: Remove redundant if Daniel Kiper
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 02/10] multiboot2: Clarify meaning of information request header tag Daniel Kiper
2016-06-09 21:14 ` Andrew Cooper
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 03/10] multiboot2: Fix description of EFI boot services tag Daniel Kiper
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 04/10] multiboot2: Add description of support for EFI boot services Daniel Kiper
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 05/10] multiboot2: Add description of EFI image handle tags Daniel Kiper
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 06/10] multiboot2: Add description of support for relocatable images Daniel Kiper
2016-06-09 21:36 ` Andrew Cooper
2016-06-10 17:36 ` Daniel Kiper [this message]
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 07/10] multiboot2: Say that memory maps may not be available on EFI platforms Daniel Kiper
2016-06-09 21:37 ` Andrew Cooper
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 08/10] multiboot2: Add C structure alignment and padding consideration section Daniel Kiper
2016-06-09 22:07 ` Andrew Cooper
[not found] ` <1c1e54de-2f19-20b6-b8c8-229619b95038@citrix.com>
2016-06-10 17:58 ` Daniel Kiper
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 09/10] multiboot2: Add me to authors Daniel Kiper
2016-06-09 20:30 ` [MULTIBOOT2 DOC PATCH 10/10] multiboot2: Bump version to 2.0 Daniel Kiper
[not found] ` <1465504244-17175-2-git-send-email-daniel.kiper@oracle.com>
2016-06-09 21:02 ` [MULTIBOOT2 DOC PATCH 01/10] multiboot2: Remove redundant if Andrew Cooper
[not found] ` <1465504244-17175-5-git-send-email-daniel.kiper@oracle.com>
2016-06-09 21:31 ` [MULTIBOOT2 DOC PATCH 04/10] multiboot2: Add description of support for EFI boot services Andrew Cooper
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