Changeset 77254 in vbox for trunk/src/VBox/Devices

Timestamp:

Feb 11, 2019 11:04:54 AM (6 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

128761

Message:

Comment.

File:

• trunk/src/VBox/Devices/PC/DevFwCommon.cpp (modified) (1 diff)

trunk/src/VBox/Devices/PC/DevFwCommon.cpp

@@ -997 +997 @@
     aBiosHeaders.dmi.u16TablesLength = cbDmiTables;
     aBiosHeaders.dmi.u16TableEntries = cNumDmiTables;
+    /* NB: The _SM_ table checksum technically covers both the _SM_ part (16 bytes) and the _DMI_ part
+     * (further 15 bytes). However, because the _DMI_ checksum must be zero, the _SM_ checksum can
+     * be calculated independently.
+     */
     aBiosHeaders.smbios.u8Checksum   = fwCommonChecksum((uint8_t*)&aBiosHeaders.smbios, sizeof(aBiosHeaders.smbios));
     aBiosHeaders.dmi.u8Checksum      = fwCommonChecksum((uint8_t*)&aBiosHeaders.dmi,    sizeof(aBiosHeaders.dmi));