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7e98da058f
This change reorganizes and cleanups our patches to reduce the patch number from 314 patches to 187. That's achieved by dropping patches that are later reverted and squashing fixes for earlier patches that introduced features. There are no code changes and the diff with upstream is the same before and after the cleanup. Having fewer patches makes easier to manage the patchset and also will ease to rebase them on top of the latest grub-2.04 release. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
71 lines
3.1 KiB
Diff
71 lines
3.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Thu, 16 Aug 2018 11:08:11 -0400
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Subject: [PATCH] Make linux_arm_kernel_header.hdr_offset be at the right place
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The kernel in front of me (slightly edited to make objdump work) looks like:
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00000000 4d 5a 10 13 4d 5a 10 13 4d 5a 10 13 4d 5a 10 13 |MZ..MZ..MZ..MZ..|
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00000010 4d 5a 10 13 4d 5a 10 13 4d 5a 10 13 00 00 a0 e1 |MZ..MZ..MZ......|
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00000020 f6 03 00 ea 18 28 6f 01 00 00 00 00 00 32 74 00 |.....(o......2t.|
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00000030 01 02 03 04 45 45 45 45 74 a2 00 00 40 00 00 00 |....EEEEt...@...|
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00000040 50 45 00 00 4c 01 04 00 00 00 00 00 00 00 00 00 |PE..L...........|
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00000050 00 00 00 00 90 00 06 03 0b 01 02 14 00 20 74 00 |............. t.|
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00000060 00 14 00 00 00 00 00 00 b4 19 00 00 00 10 00 00 |................|
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00000070 00 30 74 00 00 00 00 00 00 10 00 00 00 02 00 00 |.0t.............|
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00000080 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
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00000090 00 44 74 00 00 10 00 00 00 00 00 00 0a 00 00 00 |.Dt.............|
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000000a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
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000000b0 00 00 00 00 06 00 00 00 00 00 00 00 00 00 00 00 |................|
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000000c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
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*
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(I don't know why the MZ header is there 7 times, but the offsets work out, so
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it's merely a surprising distraction.)
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If linux_arm_kernel_header.reserved2 is 16 bytes, that means hdr_offset is
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here:
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00000030 01 02 03 04 45 45 45 45 74 a2 00 00 40 00 00 00 |....EEEEt...@...|
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00000040 50 45 00 00 4c 01 04 00 00 00 00 00 00 00 00 00 |PE..L...........|
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^^^^^^^^^^^
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But it's supposed to be 4 bytes before that.
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This patch makes the reserved field be 3*32 instead of 4*32, and that means we
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can find the PE header correcrtly at 0x40 by reading the value at 0x3c.
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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grub-core/loader/efi/linux.c | 3 +++
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include/grub/arm/linux.h | 2 +-
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2 files changed, 4 insertions(+), 1 deletion(-)
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diff --git a/grub-core/loader/efi/linux.c b/grub-core/loader/efi/linux.c
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index 0622dfa48d4..b56ea0bc041 100644
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--- a/grub-core/loader/efi/linux.c
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+++ b/grub-core/loader/efi/linux.c
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@@ -79,7 +79,10 @@ grub_efi_linux_boot (void *kernel_addr, grub_off_t handover_offset,
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offset = 512;
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#endif
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+ grub_dprintf ("linux", "kernel_addr: %p handover_offset: %p params: %p\n",
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+ kernel_addr, (void *)(grub_efi_uintn_t)handover_offset, kernel_params);
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hf = (handover_func)((char *)kernel_addr + handover_offset + offset);
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+ grub_dprintf ("linux", "handover_func() = %p\n", hf);
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hf (grub_efi_image_handle, grub_efi_system_table, kernel_params);
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return GRUB_ERR_BUG;
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diff --git a/include/grub/arm/linux.h b/include/grub/arm/linux.h
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index 5900fc8a40c..bed308f22cb 100644
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--- a/include/grub/arm/linux.h
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+++ b/include/grub/arm/linux.h
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@@ -31,7 +31,7 @@ struct linux_arm_kernel_header {
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grub_uint32_t magic;
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grub_uint32_t start; /* _start */
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grub_uint32_t end; /* _edata */
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- grub_uint32_t reserved2[4];
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+ grub_uint32_t reserved2[3];
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grub_uint32_t hdr_offset;
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};
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