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Re: [GRUB2 PATCH v5 1/4] i386/relocator: Add grub_relocator64_efi reloca
From: |
Konrad Rzeszutek Wilk |
Subject: |
Re: [GRUB2 PATCH v5 1/4] i386/relocator: Add grub_relocator64_efi relocator |
Date: |
Fri, 25 Mar 2016 12:28:46 -0400 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Fri, Mar 18, 2016 at 06:00:23PM +0100, Daniel Kiper wrote:
> Add grub_relocator64_efi relocator. It will be used on EFI 64-bit platforms
> when multiboot2 compatible image requests MULTIBOOT_TAG_TYPE_EFI_BS. Relocator
> will set lower parts of %rax and %rbx accordingly to multiboot2 specification.
> On the other hand processor mode, just before jumping into loaded image, will
> be set accordingly to Unified Extensible Firmware Interface Specification,
> Version 2.4 Errata B, section 2.3.4, x64 Platforms, boot services. This way
> loaded image will be able to use EFI boot services without any issues.
>
> Signed-off-by: Daniel Kiper <address@hidden>
Reviewed-by: Konrad Rzeszutek Wilk <address@hidden>
.. with one modification:
.. snip..
> diff --git a/grub-core/lib/x86_64/efi/relocator.c
> b/grub-core/lib/x86_64/efi/relocator.c
> new file mode 100644
> index 0000000..c93d061
> --- /dev/null
> +++ b/grub-core/lib/x86_64/efi/relocator.c
> +grub_err_t
> +grub_relocator64_efi_boot (struct grub_relocator *rel,
> + struct grub_relocator64_efi_state state)
> +{
> + grub_err_t err;
> + void *relst;
> + grub_relocator_chunk_t ch;
> +
> + err = grub_relocator_alloc_chunk_align (rel, &ch, 0,
> + 0x40000000 - RELOCATOR_SIZEOF
> (64_efi),
^^^^^^^^^^ - why the 1GB?
Could you give a bit details on it? Or preferrable have a comment right
above saying what that value is used?
Thanks.
- [GRUB2 PATCH v5 0/4] multiboot2: Add two extensions, Daniel Kiper, 2016/03/18
- [GRUB2 PATCH v5 2/4] multiboot2: Add tags used to pass ImageHandle to loaded image, Daniel Kiper, 2016/03/18
- [GRUB2 PATCH v5 3/4 - FOR COMMIT] multiboot2: Do not pass memory maps to image if EFI boot services are enabled, Daniel Kiper, 2016/03/18
- [GRUB2 PATCH v5 3/4 - FOR REVIEW ONLY] multiboot2: Do not pass memory maps to image if EFI boot services are enabled, Daniel Kiper, 2016/03/18
- [GRUB2 PATCH v5 4/4] multiboot2: Add support for relocatable images, Daniel Kiper, 2016/03/18
- [GRUB2 PATCH v5 1/4] i386/relocator: Add grub_relocator64_efi relocator, Daniel Kiper, 2016/03/18
- Re: [GRUB2 PATCH v5 1/4] i386/relocator: Add grub_relocator64_efi relocator,
Konrad Rzeszutek Wilk <=