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From: Daniel Kiper <daniel.kiper@oracle.com>
To: xen-devel@lists.xenproject.org
Cc: andrew.cooper3@citrix.com, jbeulich@suse.com
Subject: [PATCH RFC 3/7] xen/x86: Add some addresses to the Multiboot header
Date: Sat,  8 Jul 2017 23:53:18 +0200	[thread overview]
Message-ID: <1499550803-25664-4-git-send-email-daniel.kiper@oracle.com> (raw)
In-Reply-To: <1499550803-25664-1-git-send-email-daniel.kiper@oracle.com>

In comparison to ELF the PE format is not supported by the Multiboot
protocol. So, if we wish to load xen.efi using this protocol we have
to put header_addr, load_addr, load_end_addr, bss_end_addr and
entry_addr data into Multiboot header.

Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 xen/arch/x86/boot/head.S |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/boot/head.S b/xen/arch/x86/boot/head.S
index 28bbc04..0c603a5 100644
--- a/xen/arch/x86/boot/head.S
+++ b/xen/arch/x86/boot/head.S
@@ -195,13 +195,24 @@ ENTRY(start)
         .align 4
 multiboot1_header_start:       /*** MULTIBOOT1 HEADER ****/
 #define MULTIBOOT_HEADER_FLAGS (MULTIBOOT_HEADER_MODS_ALIGNED | \
-                                MULTIBOOT_HEADER_WANT_MEMORY)
+                                MULTIBOOT_HEADER_WANT_MEMORY | \
+                                MULTIBOOT_HEADER_HAS_ADDR)
         /* Magic number indicating a Multiboot header. */
         .long   MULTIBOOT_HEADER_MAGIC
         /* Flags to bootloader (see Multiboot spec). */
         .long   MULTIBOOT_HEADER_FLAGS
         /* Checksum: must be the negated sum of the first two fields. */
         .long   -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
+        /* header_addr */
+        .long   sym_offs(multiboot1_header_start)
+        /* load_addr */
+        .long   sym_offs(start)
+        /* load_end_addr */
+        .long   sym_offs(__bss_start)
+        /* bss_end_addr */
+        .long   sym_offs(__2M_rwdata_end)
+        /* entry_addr */
+        .long   sym_offs(__start)
 multiboot1_header_end:
 
 /*** MULTIBOOT2 HEADER ****/
-- 
1.7.10.4


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  parent reply	other threads:[~2017-07-08 21:53 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-08 21:53 [PATCH RFC 0/7] Change xen.efi build and add SHIM_LOCK verification into efi_multiboot2() Daniel Kiper
2017-07-08 21:53 ` [PATCH RFC 1/7] xen: Introduce XEN_COMPILE_POSIX_TIME Daniel Kiper
2018-04-30 15:56   ` Jan Beulich
2018-05-08 12:18     ` Daniel Kiper
2018-05-14 10:30       ` Jan Beulich
2018-05-14 16:25         ` Daniel Kiper
2018-05-15  7:47           ` Jan Beulich
2017-07-08 21:53 ` [PATCH RFC 2/7] xen/x86: Manually build PE header Daniel Kiper
2018-05-04 15:38   ` Jan Beulich
2018-05-08 12:47     ` Daniel Kiper
2018-05-14 10:40       ` Jan Beulich
2018-05-14 16:52         ` Daniel Kiper
2018-05-15  8:01           ` Jan Beulich
2017-07-08 21:53 ` Daniel Kiper [this message]
2018-05-04 15:40   ` [PATCH RFC 3/7] xen/x86: Add some addresses to the Multiboot header Jan Beulich
2018-05-08 13:01     ` Daniel Kiper
2017-07-08 21:53 ` [PATCH RFC 4/7] xen/x86: Add some addresses to the Multiboot2 header Daniel Kiper
2017-07-08 21:53 ` [PATCH RFC 5/7] efi: split out efi_shim_lock() Daniel Kiper
2017-07-08 21:53 ` [PATCH RFC 6/7] xen/x86/efi: Verify dom0 kernel with SHIM_LOCK protocol in efi_multiboot2() Daniel Kiper
2018-05-04 15:46   ` Jan Beulich
2018-05-08 13:09     ` Daniel Kiper
2018-05-14 10:43       ` Jan Beulich
2018-05-14 16:56         ` Daniel Kiper
2018-05-15  8:06           ` Jan Beulich
2017-07-08 21:53 ` [PATCH RFC 7/7] xen/x86: Build xen.mb.efi directly from xen-syms Daniel Kiper

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