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[Qemu-devel] [PATCH] fix loading tiny kernels


From: René Rebe
Subject: [Qemu-devel] [PATCH] fix loading tiny kernels
Date: Tue, 03 Feb 2009 09:59:31 +0100
User-agent: Thunderbird 2.0.0.19 (X11/20090106)

Further testing / polishing the multi-boot kernel loading support I found
the existing code fails to load unusual small kernels, less than 8192 bytes -
for example the example multi-boot kernel shipped within GRUB that
compiles to just 7121 bytes on my system.

Signed-off-by: René Rebe <address@hidden>

--- hw/pc.c     (revision 6501)
+++ hw/pc.c     (working copy)
@@ -554,7 +989,7 @@
    /* load the kernel header */
    f = fopen(kernel_filename, "rb");
    if (!f || !(kernel_size = get_file_size(f)) ||
-    fread(header, 1, 1024, f) != 1024) {
+ fread(header, 1, MIN(8192, kernel_size), f) != MIN(8192, kernel_size)) {
    fprintf(stderr, "qemu: could not load kernel '%s'\n",
        kernel_filename);
    exit(1);

--
 René Rebe - ExactCODE GmbH - Europe, Germany, Berlin
 http://exactcode.de | http://t2-project.org | http://rene.rebe.name





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