hw/x86: add a couple of comments explaining how the kernel image is p…

…arsed Cosmetic: add comments in x86_load_linux() pointing to the kernel documentation so that users can better understand the code. CC: [email protected] Signed-off-by: Ani Sinha <[email protected]> Reviewed-by: Zhao Liu <[email protected]> Reviewed-by: Michael Tokarev <[email protected]> Signed-off-by: Michael Tokarev <[email protected]>
cube0x8 · Aug 23, 2024 · 80e3541 · 80e3541
1 parent 407f9a4
commit 80e3541
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/hw/i386/x86-common.c b/hw/i386/x86-common.c
@@ -665,8 +665,11 @@ void x86_load_linux(X86MachineState *x86ms,
         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 {
         /*