From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1cA0pH-000087-Hh for mharc-grub-devel@gnu.org; Thu, 24 Nov 2016 15:40:59 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33857) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cA0pD-00006A-1y for grub-devel@gnu.org; Thu, 24 Nov 2016 15:40:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cA0p8-00024p-4k for grub-devel@gnu.org; Thu, 24 Nov 2016 15:40:55 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:37596) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cA0p7-00024X-Qg for grub-devel@gnu.org; Thu, 24 Nov 2016 15:40:50 -0500 Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id uAOKeks4004642 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 24 Nov 2016 20:40:47 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id uAOKekrh001313 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 24 Nov 2016 20:40:46 GMT Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id uAOKejlB025423; Thu, 24 Nov 2016 20:40:45 GMT Received: from olila.local.net-space.pl (/10.175.249.101) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 24 Nov 2016 12:40:45 -0800 From: Daniel Kiper To: grub-devel@gnu.org, xen-devel@lists.xenproject.org Cc: andrew.cooper3@citrix.com, arvidjaar@gmail.com, eric.snowberg@oracle.com, jgross@suse.com, konrad.wilk@oracle.com, phcoder@gmail.com, seth.goldberg@oracle.com Subject: [MULTIBOOT2 DOC PATCH v2 07/11] multiboot2: Add description of support for relocatable images Date: Thu, 24 Nov 2016 21:40:06 +0100 Message-Id: <1480020010-18421-8-git-send-email-daniel.kiper@oracle.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1480020010-18421-1-git-send-email-daniel.kiper@oracle.com> References: <1480020010-18421-1-git-send-email-daniel.kiper@oracle.com> X-Source-IP: userv0021.oracle.com [156.151.31.71] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] [fuzzy] X-Received-From: 141.146.126.69 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: , X-List-Received-Date: Thu, 24 Nov 2016 20:40:58 -0000 Signed-off-by: Daniel Kiper --- v2 - suggestions/fixes: - add missing the articles (suggested by Andrew Cooper), - various minor cleanups and fixes (suggested by Andrew Cooper). --- doc/multiboot.texi | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++ doc/multiboot2.h | 24 ++++++++++++++++++++++ 2 files changed, 80 insertions(+) diff --git a/doc/multiboot.texi b/doc/multiboot.texi index dca3e62..973be9f 100644 --- a/doc/multiboot.texi +++ b/doc/multiboot.texi @@ -359,6 +359,7 @@ executable header. * Console header tags:: * Module alignment tag:: * EFI boot services tag:: +* Relocatable header tag:: @end menu @@ -685,6 +686,47 @@ u32 | size = 8 | This tag indicates that payload supports starting without terminating boot services. +@node Relocatable header tag +@subsection Relocatable header tag + +@example +@group + +-------------------+ +u16 | type = 10 | +u16 | flags | +u32 | size = 24 | +u32 | min_addr | +u32 | max_addr | +u32 | align | +u32 | preference | + +-------------------+ +@end group +@end example + +This tag indicates that image is relocatable. + +The meaning of each field is as follows: + +@table @code +@item min_addr +Lowest possible physical address at which image should be loaded. +The bootloader cannot load any part of image below this address. + +@item max_addr +Highest possible physical address at which loaded image should end. +The bootloader cannot load any part of image above this address. + +@item align +Image alignment in memory, e.g. 4096. + +@item preference +It contains load address placement suggestion for boot loader. +Boot loader should follow it. @samp{0} means none, @samp{1} means +load image at lowest possible address but not lower than min_addr +and @samp{2} means load image at highest possible address but not +higher than max_addr. +@end table + @node Machine state @section MIPS machine state @@ -1316,6 +1358,20 @@ u64 | pointer | This tag contains pointer to EFI amd64 image handle. Usually it is boot loader image handle. +@subsection Image load base physical address +@example +@group + +-------------------+ +u32 | type = 21 | +u32 | size = 12 | +u32 | load_base_addr | + +-------------------+ +@end group +@end example + +This tag contains image load base physical address. It is +provided only if image has relocatable header tag. + @node Examples @chapter Examples diff --git a/doc/multiboot2.h b/doc/multiboot2.h index b85cb13..b181607 100644 --- a/doc/multiboot2.h +++ b/doc/multiboot2.h @@ -62,6 +62,7 @@ #define MULTIBOOT_TAG_TYPE_EFI_BS 18 #define MULTIBOOT_TAG_TYPE_EFI32_IH 19 #define MULTIBOOT_TAG_TYPE_EFI64_IH 20 +#define MULTIBOOT_TAG_TYPE_LOAD_BASE_ADDR 21 #define MULTIBOOT_HEADER_TAG_END 0 #define MULTIBOOT_HEADER_TAG_INFORMATION_REQUEST 1 @@ -73,11 +74,16 @@ #define MULTIBOOT_HEADER_TAG_EFI_BS 7 #define MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS_EFI32 8 #define MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS_EFI64 9 +#define MULTIBOOT_HEADER_TAG_RELOCATABLE 10 #define MULTIBOOT_ARCHITECTURE_I386 0 #define MULTIBOOT_ARCHITECTURE_MIPS32 4 #define MULTIBOOT_HEADER_TAG_OPTIONAL 1 +#define MULTIBOOT_LOAD_PREFERENCE_NONE 0 +#define MULTIBOOT_LOAD_PREFERENCE_LOW 1 +#define MULTIBOOT_LOAD_PREFERENCE_HIGH 2 + #define MULTIBOOT_CONSOLE_FLAGS_CONSOLE_REQUIRED 1 #define MULTIBOOT_CONSOLE_FLAGS_EGA_TEXT_SUPPORTED 2 @@ -162,6 +168,17 @@ struct multiboot_header_tag_module_align multiboot_uint32_t size; }; +struct multiboot_header_tag_relocatable +{ + multiboot_uint16_t type; + multiboot_uint16_t flags; + multiboot_uint32_t size; + multiboot_uint32_t min_addr; + multiboot_uint32_t max_addr; + multiboot_uint32_t align; + multiboot_uint32_t preference; +}; + struct multiboot_color { multiboot_uint8_t red; @@ -388,6 +405,13 @@ struct multiboot_tag_efi64_ih multiboot_uint64_t pointer; }; +struct multiboot_tag_load_base_addr +{ + multiboot_uint32_t type; + multiboot_uint32_t size; + multiboot_uint32_t load_base_addr; +}; + #endif /* ! ASM_FILE */ #endif /* ! MULTIBOOT_HEADER */ -- 1.7.10.4