hw/x86: add a couple of comments explaining how the kernel image is parsed
Cosmetic: add comments in x86_load_linux() pointing to the kernel documentation
so that users can better understand the code.
CC: qemu-trivial@nongnu.org
Signed-off-by: Ani Sinha <anisinha@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/hw/i386/x86-common.c b/hw/i386/x86-common.c
index c0c66a0..992ea1f 100644
--- a/hw/i386/x86-common.c
+++ b/hw/i386/x86-common.c
@@ -665,8 +665,11 @@
exit(1);
}
- /* kernel protocol version */
- if (ldl_p(header + 0x202) == 0x53726448) {
+ /*
+ * kernel protocol version.
+ * Please see https://www.kernel.org/doc/Documentation/x86/boot.txt
+ */
+ if (ldl_p(header + 0x202) == 0x53726448) /* Magic signature "HdrS" */ {
protocol = lduw_p(header + 0x206);
} else {
/*
