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[2001:4830:134:3::11]) by mx.google.com with ESMTPS id l125si1181087qkf.173.2017.08.29.11.56.38 for (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 29 Aug 2017 11:56:38 -0700 (PDT) Received-SPF: pass (google.com: domain of grub-devel-bounces+patch=linaro.org@gnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; Authentication-Results: mx.google.com; spf=pass (google.com: domain of grub-devel-bounces+patch=linaro.org@gnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=grub-devel-bounces+patch=linaro.org@gnu.org Received: from localhost ([::1]:46544 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dmlgi-0006o3-Ot for patch@linaro.org; Tue, 29 Aug 2017 14:56:36 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53519) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dmlfm-00063z-DR for grub-devel@gnu.org; Tue, 29 Aug 2017 14:55:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dmlfj-00022z-Ax for grub-devel@gnu.org; Tue, 29 Aug 2017 14:55:38 -0400 Received: from mx2.suse.de ([195.135.220.15]:48902 helo=mx1.suse.de) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dmlfi-000223-Oq for grub-devel@gnu.org; Tue, 29 Aug 2017 14:55:35 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 3AFFBAF4F; Tue, 29 Aug 2017 18:55:33 +0000 (UTC) From: Alexander Graf To: grub-devel@gnu.org Subject: [PATCH v4 1/2] efi: Move grub_reboot() into kernel Date: Tue, 29 Aug 2017 20:55:31 +0200 Message-Id: <20170829185532.48943-2-agraf@suse.de> X-Mailer: git-send-email 2.12.3 In-Reply-To: <20170829185532.48943-1-agraf@suse.de> References: <20170829185532.48943-1-agraf@suse.de> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no timestamps) [generic] [fuzzy] X-Received-From: 195.135.220.15 X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: The development of GNU GRUB Cc: Leif Lindholm , phcoder@gmail.com, mchang@suse.com, Daniel Kiper , elliott@hpe.com MIME-Version: 1.0 Errors-To: grub-devel-bounces+patch=linaro.org@gnu.org Sender: "Grub-devel" The reboot function calls machine_fini() and then reboots the system. Currently it lives in lib/ which means it gets compiled into the reboot module which lives on the heap. In a following patch, I want to free the heap on machine_fini() though, so we would free the memory that the code is running in. That obviously breaks with smarter UEFI implementations. So this patch moves it into the core. That way we ensure that all code running after machine_fini() in the UEFI case is running from memory that got allocated (and gets deallocated) by the UEFI core. Signed-off-by: Alexander Graf --- v3 -> v4: - Move grub_reboot to kern/efi/efi.c --- grub-core/Makefile.core.def | 4 ---- grub-core/kern/efi/efi.c | 9 +++++++++ grub-core/lib/efi/reboot.c | 33 --------------------------------- include/grub/misc.h | 3 ++- 4 files changed, 11 insertions(+), 38 deletions(-) delete mode 100644 grub-core/lib/efi/reboot.c -- 2.12.3 _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def index a65c27f7f..1cc4ce374 100644 --- a/grub-core/Makefile.core.def +++ b/grub-core/Makefile.core.def @@ -872,10 +872,6 @@ module = { name = reboot; i386 = lib/i386/reboot.c; i386 = lib/i386/reboot_trampoline.S; - ia64_efi = lib/efi/reboot.c; - x86_64_efi = lib/efi/reboot.c; - arm_efi = lib/efi/reboot.c; - arm64_efi = lib/efi/reboot.c; powerpc_ieee1275 = lib/ieee1275/reboot.c; sparc64_ieee1275 = lib/ieee1275/reboot.c; mips_arc = lib/mips/arc/reboot.c; diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c index d467785fc..708581fcb 100644 --- a/grub-core/kern/efi/efi.c +++ b/grub-core/kern/efi/efi.c @@ -155,6 +155,15 @@ grub_efi_get_loaded_image (grub_efi_handle_t image_handle) } void +grub_reboot (void) +{ + grub_machine_fini (GRUB_LOADER_FLAG_NORETURN); + efi_call_4 (grub_efi_system_table->runtime_services->reset_system, + GRUB_EFI_RESET_COLD, GRUB_EFI_SUCCESS, 0, NULL); + for (;;) ; +} + +void grub_exit (void) { grub_machine_fini (GRUB_LOADER_FLAG_NORETURN); diff --git a/grub-core/lib/efi/reboot.c b/grub-core/lib/efi/reboot.c deleted file mode 100644 index 7de8bcb5d..000000000 --- a/grub-core/lib/efi/reboot.c +++ /dev/null @@ -1,33 +0,0 @@ -/* - * GRUB -- GRand Unified Bootloader - * Copyright (C) 2011 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 . - */ - -#include -#include -#include -#include -#include -#include - -void -grub_reboot (void) -{ - grub_machine_fini (GRUB_LOADER_FLAG_NORETURN); - efi_call_4 (grub_efi_system_table->runtime_services->reset_system, - GRUB_EFI_RESET_COLD, GRUB_EFI_SUCCESS, 0, NULL); - for (;;) ; -} diff --git a/include/grub/misc.h b/include/grub/misc.h index 2a9f87cc2..372f009e8 100644 --- a/include/grub/misc.h +++ b/include/grub/misc.h @@ -396,7 +396,8 @@ grub_abs (int x) } /* Reboot the machine. */ -#if defined (GRUB_MACHINE_EMU) || defined (GRUB_MACHINE_QEMU_MIPS) +#if defined (GRUB_MACHINE_EMU) || defined (GRUB_MACHINE_QEMU_MIPS) || \ + defined (GRUB_MACHINE_EFI) void EXPORT_FUNC(grub_reboot) (void) __attribute__ ((noreturn)); #else void grub_reboot (void) __attribute__ ((noreturn));