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49 lines
1.7 KiB
49 lines
1.7 KiB
From 9889cf801bb7e8b70a249873a9c8254ac6ef8a39 Mon Sep 17 00:00:00 2001 |
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From: Piotr Krysiuk <piotras@gmail.com> |
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Date: Sun, 20 Apr 2014 15:58:45 +0200 |
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Subject: [PATCH 079/237] Allow loading old kernels by placing GDT in |
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conventional memory. |
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--- |
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ChangeLog | 5 +++++ |
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grub-core/lib/i386/relocator.c | 11 +++++++---- |
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2 files changed, 12 insertions(+), 4 deletions(-) |
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diff --git a/ChangeLog b/ChangeLog |
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index 3556468..73a8928 100644 |
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--- a/ChangeLog |
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+++ b/ChangeLog |
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@@ -1,3 +1,8 @@ |
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+2014-04-20 Piotr Krysiuk <piotras@gmail.com> |
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+ |
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+ * grub-core/lib/i386/relocator.c: Allow loading old kernels by placing |
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+ GDT in conventional memory. |
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+ |
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2014-04-10 Colin Watson <cjwatson@ubuntu.com> |
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* util/grub.d/30_os-prober.in: Tolerate devices with no filesystem |
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diff --git a/grub-core/lib/i386/relocator.c b/grub-core/lib/i386/relocator.c |
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index d2a1b27..ffaf25f 100644 |
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--- a/grub-core/lib/i386/relocator.c |
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+++ b/grub-core/lib/i386/relocator.c |
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@@ -81,10 +81,13 @@ grub_relocator32_boot (struct grub_relocator *rel, |
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void *relst; |
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grub_relocator_chunk_t ch; |
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- err = grub_relocator_alloc_chunk_align (rel, &ch, 0, |
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- (0xffffffff - RELOCATOR_SIZEOF (32)) |
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- + 1, RELOCATOR_SIZEOF (32), 16, |
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- GRUB_RELOCATOR_PREFERENCE_NONE, |
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+ /* Specific memory range due to Global Descriptor Table for use by payload |
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+ that we will store in returned chunk. The address range and preference |
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+ are based on "THE LINUX/x86 BOOT PROTOCOL" specification. */ |
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+ err = grub_relocator_alloc_chunk_align (rel, &ch, 0x1000, |
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+ 0x9a000 - RELOCATOR_SIZEOF (32), |
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+ RELOCATOR_SIZEOF (32), 16, |
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+ GRUB_RELOCATOR_PREFERENCE_LOW, |
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avoid_efi_bootservices); |
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if (err) |
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return err; |
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-- |
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2.9.3 |
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