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From 82d95254ca0496c8843113665bb9a99876101025 Mon Sep 17 00:00:00 2001
From: Michael Chang <[email protected]>
Date: Fri, 8 Oct 2021 13:36:45 +0800
Subject: [PATCH 01/11] Factor out grub_efi_linux_boot
Both x86 and arm64 on efi are using handover protocol to boot linux
kernel. To enable better code reuse, factor out grub_efi_linux_boot from
arm64 so that it can be shared with x86 platform for the common fixes.
Signed-off-by: Michael Chang <[email protected]>
---
grub-core/Makefile.core.def | 1 +
grub-core/loader/arm64/efi/linux.c | 35 +-----------------
grub-core/loader/efi/linux.c | 58 ++++++++++++++++++++++++++++++
grub-core/loader/i386/efi/linux.c | 13 ++-----
include/grub/efi/linux.h | 29 +++++++++++++++
5 files changed, 92 insertions(+), 44 deletions(-)
create mode 100644 grub-core/loader/efi/linux.c
create mode 100644 include/grub/efi/linux.h
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -1860,6 +1860,9 @@
riscv64 = loader/efi/linux.c;
emu = loader/emu/linux.c;
common = loader/linux.c;
+ i386_efi = loader/efi/linux_boot.c;
+ x86_64_efi = loader/efi/linux_boot.c;
+ arm64 = loader/efi/linux_boot.c;
};
module = {
--- a/grub-core/loader/arm64/efi/linux.c
+++ b/grub-core/loader/arm64/efi/linux.c
@@ -33,6 +33,7 @@
#include <grub/i18n.h>
#include <grub/lib/cmdline.h>
#include <grub/verify.h>
+#include <grub/efi/linux.h>
GRUB_MOD_LICENSE ("GPLv3+");
@@ -51,40 +52,6 @@
static grub_addr_t initrd_start;
static grub_addr_t initrd_end;
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wcast-align"
-
-typedef void (*handover_func) (void *, grub_efi_system_table_t *, void *);
-
-static grub_err_t
-grub_efi_linux_boot (void *kernel_address, grub_off_t offset,
- void *kernel_params)
-{
- grub_efi_loaded_image_t *loaded_image = NULL;
- handover_func hf;
-
- /*
- * Since the EFI loader is not calling the LoadImage() and StartImage()
- * services for loading the kernel and booting respectively, it has to
- * set the Loaded Image base address.
- */
- loaded_image = grub_efi_get_loaded_image (grub_efi_image_handle);
- if (loaded_image)
- loaded_image->image_base = kernel_addr;
- else
- grub_dprintf ("linux", "Loaded Image base address could not be set\n");
-
- grub_dprintf ("linux", "kernel_addr: %p handover_offset: %p params: %p\n",
- kernel_address, (void *)(grub_efi_uintn_t)offset, kernel_params);
- hf = (handover_func)((char *)kernel_address + offset);
- grub_dprintf ("linux", "handover_func() = %p\n", hf);
- hf (grub_efi_image_handle, grub_efi_system_table, kernel_params);
-
- return GRUB_ERR_BUG;
-}
-
-#pragma GCC diagnostic pop
-
static grub_err_t
grub_arch_efi_linux_check_image (struct linux_arch_kernel_header * lh)
{
--- a/grub-core/loader/i386/efi/linux.c
+++ b/grub-core/loader/i386/efi/linux.c
@@ -26,6 +26,7 @@
#include <grub/i18n.h>
#include <grub/lib/cmdline.h>
#include <grub/efi/efi.h>
+#include <grub/efi/linux.h>
GRUB_MOD_LICENSE ("GPLv3+");
@@ -40,26 +41,18 @@
#define BYTES_TO_PAGES(bytes) (((bytes) + 0xfff) >> 12)
-typedef void(*handover_func)(void *, grub_efi_system_table_t *, struct linux_kernel_params *);
-
static grub_err_t
grub_linuxefi_boot (void)
{
- handover_func hf;
int offset = 0;
#ifdef __x86_64__
offset = 512;
#endif
-
- hf = (handover_func)((char *)kernel_mem + handover_offset + offset);
-
asm volatile ("cli");
- hf (grub_efi_image_handle, grub_efi_system_table, params);
-
- /* Not reached */
- return GRUB_ERR_NONE;
+ return grub_efi_linux_boot ((char *)kernel_mem, handover_offset + offset,
+ params);
}
static grub_err_t
--- /dev/null
+++ b/include/grub/efi/linux.h
@@ -0,0 +1,29 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2014 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef GRUB_EFI_LINUX_HEADER
+#define GRUB_EFI_LINUX_HEADER 1
+
+#include <grub/efi/api.h>
+#include <grub/err.h>
+#include <grub/symbol.h>
+
+grub_err_t
+EXPORT_FUNC(grub_efi_linux_boot) (void *kernel_address, grub_off_t offset,
+ void *kernel_param);
+
+#endif /* ! GRUB_EFI_LINUX_HEADER */
--- /dev/null
+++ b/grub-core/loader/efi/linux_boot.c
@@ -0,0 +1,58 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2014 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/err.h>
+#include <grub/mm.h>
+#include <grub/types.h>
+#include <grub/cpu/linux.h>
+#include <grub/efi/efi.h>
+#include <grub/efi/pe32.h>
+#include <grub/efi/linux.h>
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-align"
+
+typedef void (*handover_func) (void *, grub_efi_system_table_t *, void *);
+
+grub_err_t
+grub_efi_linux_boot (void *kernel_addr, grub_off_t offset,
+ void *kernel_params)
+{
+ grub_efi_loaded_image_t *loaded_image = NULL;
+ handover_func hf;
+
+ /*
+ * Since the EFI loader is not calling the LoadImage() and StartImage()
+ * services for loading the kernel and booting respectively, it has to
+ * set the Loaded Image base address.
+ */
+ loaded_image = grub_efi_get_loaded_image (grub_efi_image_handle);
+ if (loaded_image)
+ loaded_image->image_base = kernel_addr;
+ else
+ grub_dprintf ("linux", "Loaded Image base address could not be set\n");
+
+ grub_dprintf ("linux", "kernel_addr: %p handover_offset: %p params: %p\n",
+ kernel_addr, (void *)(grub_efi_uintn_t)offset, kernel_params);
+ hf = (handover_func)((char *)kernel_addr + offset);
+ hf (grub_efi_image_handle, grub_efi_system_table, kernel_params);
+
+ return GRUB_ERR_BUG;
+}
+
+#pragma GCC diagnostic pop
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