Verify Record Directive Table

The Verify Record Directive Table is an optional table. It maintains a record of the pages in the EXE file that have been fixed up and written back to the original linear EXE module, along with the module dependencies used to perform these fixups. This table provides an efficient means for verifying the virtual addresses required for the fixed up pages when the module is loaded. Each Verify Record entry has the following format

          кФФФФФФФФФФФП
      00h Г# OF ENTRY Г
          УФФФФФФФФФФФХФФФФФФФФФФФТФФФФФФФФФФФП
      02h Г MOD ORD # Г  VERSION  Г MOD # OBJ Г
          УФФФФФФФФФФФХФФФФФФФФФФФХФФФФФФФФФФФД
      08h Г OBJECT #  Г BASE ADDR Г  VIRTUAL  Г
          УФФФФФФФФФФФХФФФФФФФФФФФХФФФФФФФФФФФД
      0Eh Г   . . .   Г   . . .   Г   . . .   Г

Verify Record Table

OF ENTRY = DW Number of module dependencies. This field specifies how many entries there are in the verify record directive table. This is equal to the number of modules referenced by this module.

MOD ORD # = DW Ordinal index into the Import Module Name Table. This value is an ordered index in to the Import Module Name Table for the referenced module.

VERSION = DW Module Version. This is the version of the referenced module that the fixups were originally performed. This is used to insure the same version of the referenced module is loaded that was fixed up in this module and therefore the fixups are still correct. This requires the version number in a module to be incremented anytime the entry point offsets change.

MOD # OBJ = DW Module # of Object Entries. This field is used to identify the number of object verify entries that follow for the referenced module.

OBJECT # = DW Object # in Module. This field specifies the object number in the referenced module that is being verified.

BASE ADDR = DW Object load base address. This is the address that the object was loaded at when the fixups were performed.

VIRTUAL = DW Object virtual address size. This field specifies the total amount of virtual memory required for this object.

[Back: Module Format Directives Table]
[Next: Per-Page Checksum]