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Date: Mon, 8 May 2006 00:49:26 -0400
From: "Jim C. Brown" <jma5@umd.edu>
Subject: Re: [Qemu-devel] using partition images
Message-ID: <20060508044926.GA21951@jbrown.mylinuxbox.org>
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--bg08WKrSYDhXBjb5
Content-Type: text/plain; charset=us-ascii
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On Sun, May 07, 2006 at 11:53:46PM -0400, Jim C. Brown wrote:
> Known Issues:
> 
> booting is not supported - this will require passing a separate bootsector.

I stand corrected. New patch that adds support for booting partition images.
Apply this on top of the first one.

Also attached is the required bootsector.h (this contains the actual code of
the bootsector).

Bootsector code for the MBR was taken from http://www.cpqlinux.com/mbr.html.

Also attached is a tarball of the sources I used to create bootsector.h

-- 
Infinite complexity begets infinite beauty.
Infinite precision begets infinite perfection.

--bg08WKrSYDhXBjb5
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="block.patch"

--- ../qemu.cvs/block-part-raw.c	Sun May  7 23:54:03 2006
+++ block-part-raw.c	Mon May  8 00:40:32 2006
@@ -23,6 +23,7 @@
  */
 #include "vl.h"
 #include "block_int.h"
+#include "bootsector.h"
 
 #ifdef __sun__
 #include <sys/dkio.h>
@@ -40,7 +41,7 @@
     return 0;
 }
 
-static int part_raw_open(BlockDriverState *bs, const char *filename)
+static int part_raw_open(BlockDriverState *bs, const char *nfilename)
 {
     BDRVPartRawState *s = bs->opaque;
     int fd;
@@ -53,6 +54,7 @@
     int rv;
 #endif
     int head, cylinder, sector;
+    const char * filename = &(nfilename[5]);
 
     fd = open(filename, O_RDWR | O_BINARY | O_LARGEFILE);
     if (fd < 0) {
@@ -102,6 +104,7 @@
 
     /* set up fake MBR */
     memset(s->mbr_data, 0, 63*512);
+    memcpy(s->mbr_data, mbr_boot_sector, 512);
     /* first partition is bootable */
     s->mbr_data[446] = 0x80;
     /* start head */

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