2018-07-12 14:56:34 +00:00
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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2018-07-10 19:08:14 +00:00
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From: Alexander Graf <agraf@suse.de>
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Date: Thu, 31 Aug 2017 16:40:18 +0200
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Subject: [PATCH] efi: Move grub_reboot() into kernel
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The reboot function calls machine_fini() and then reboots the system.
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Currently it lives in lib/ which means it gets compiled into the
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reboot module which lives on the heap.
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In a following patch, I want to free the heap on machine_fini()
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though, so we would free the memory that the code is running in. That
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obviously breaks with smarter UEFI implementations.
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So this patch moves it into the core. That way we ensure that all
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code running after machine_fini() in the UEFI case is running from
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memory that got allocated (and gets deallocated) by the UEFI core.
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Signed-off-by: Alexander Graf <agraf@suse.de>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/Makefile.core.def | 4 ----
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grub-core/kern/efi/efi.c | 9 +++++++++
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grub-core/lib/efi/reboot.c | 33 ---------------------------------
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include/grub/misc.h | 3 ++-
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4 files changed, 11 insertions(+), 38 deletions(-)
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delete mode 100644 grub-core/lib/efi/reboot.c
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diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
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index d90ad622082..2c1d62ceea9 100644
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--- a/grub-core/Makefile.core.def
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+++ b/grub-core/Makefile.core.def
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@@ -872,10 +872,6 @@ module = {
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name = reboot;
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i386 = lib/i386/reboot.c;
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i386 = lib/i386/reboot_trampoline.S;
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- ia64_efi = lib/efi/reboot.c;
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- x86_64_efi = lib/efi/reboot.c;
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- arm_efi = lib/efi/reboot.c;
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- arm64_efi = lib/efi/reboot.c;
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powerpc_ieee1275 = lib/ieee1275/reboot.c;
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sparc64_ieee1275 = lib/ieee1275/reboot.c;
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mips_arc = lib/mips/arc/reboot.c;
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diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
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index d467785fc6c..708581fcbde 100644
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--- a/grub-core/kern/efi/efi.c
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+++ b/grub-core/kern/efi/efi.c
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@@ -154,6 +154,15 @@ grub_efi_get_loaded_image (grub_efi_handle_t image_handle)
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GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
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}
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+void
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+grub_reboot (void)
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+{
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+ grub_machine_fini (GRUB_LOADER_FLAG_NORETURN);
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+ efi_call_4 (grub_efi_system_table->runtime_services->reset_system,
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+ GRUB_EFI_RESET_COLD, GRUB_EFI_SUCCESS, 0, NULL);
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+ for (;;) ;
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+}
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+
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void
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grub_exit (void)
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{
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diff --git a/grub-core/lib/efi/reboot.c b/grub-core/lib/efi/reboot.c
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deleted file mode 100644
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index 7de8bcb5d6e..00000000000
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--- a/grub-core/lib/efi/reboot.c
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+++ /dev/null
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@@ -1,33 +0,0 @@
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-/*
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- * GRUB -- GRand Unified Bootloader
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- * Copyright (C) 2011 Free Software Foundation, Inc.
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- *
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- * GRUB is free software: you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation, either version 3 of the License, or
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- * (at your option) any later version.
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- *
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- * GRUB is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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- */
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-
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-#include <grub/efi/api.h>
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-#include <grub/efi/efi.h>
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-#include <grub/mm.h>
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-#include <grub/misc.h>
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-#include <grub/kernel.h>
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-#include <grub/loader.h>
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-
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-void
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-grub_reboot (void)
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-{
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- grub_machine_fini (GRUB_LOADER_FLAG_NORETURN);
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- efi_call_4 (grub_efi_system_table->runtime_services->reset_system,
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- GRUB_EFI_RESET_COLD, GRUB_EFI_SUCCESS, 0, NULL);
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- for (;;) ;
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-}
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diff --git a/include/grub/misc.h b/include/grub/misc.h
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index 2a9f87cc255..372f009e84f 100644
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--- a/include/grub/misc.h
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+++ b/include/grub/misc.h
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@@ -396,7 +396,8 @@ grub_abs (int x)
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}
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/* Reboot the machine. */
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-#if defined (GRUB_MACHINE_EMU) || defined (GRUB_MACHINE_QEMU_MIPS)
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+#if defined (GRUB_MACHINE_EMU) || defined (GRUB_MACHINE_QEMU_MIPS) || \
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+ defined (GRUB_MACHINE_EFI)
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void EXPORT_FUNC(grub_reboot) (void) __attribute__ ((noreturn));
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#else
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void grub_reboot (void) __attribute__ ((noreturn));
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