Relocatable Object Module Format (OMF) Specification

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Relocatable Object Module Format 88H EXPDEF—Export Definition Record (Comment Class A0, Subtype 02) Description This record describes the exported names for a module. History This comment class and subtype is a Microsoft extension added for Microsoft C version 5.1. Record Format One exported entry point is described; the subrecord format is 1 1 2 02 Exported Exported Internal Export Flag Name Name Ordinal where: 02 Identifies the subtype as an EXPDEF. Exported Flag Is a bit-significant 8-bit field with the following format: Ordinal Resident No Parm Count Bit Name Data 1 1 1 Ordinal Bit Resident Name No Data Exported Name Internal Name Export Ordinal Parm Count Is set if the item is exported by ordinal; in this case the Export Ordinal field is present. Is set if the exported name is to be kept resident by the system loader; this is an optimization for frequently used items imported by name. Is set if the entry point does not use initialized data (either instanced or global). Is the number of parameter words. The Parm Count field is set to 0 for all but callgates to 16-bit segments. Is in count, char string format. Name to be used when the entry point is imported by name. Is in count, char string format. If the name length is 0, the internal name is the same as the Exported Name field. Otherwise, it is the name by which the entry point is known within this module. This name will appear as a PUBDEF or LPUBDEF name. Is present if the Ordinal Bit field is set; it is a 16-bit numeric field whose value is the ordinal used (must be nonzero). Note: EXPDEFs are produced by many compilers when the keyword _export is used in a source file. 16 OMF Specification, Version 1.1 Tool Interface Standards (TIS)
Relocatable Object Module Format 88H INCDEF—Incremental Compilation Record (Comment Class A0, Subtype 03) Description This record is used for incremental compilation. Every FIXUPP and LINNUM record following an INCDEF record will adjust all external index values and line number values by the appropriate delta. The deltas are cumulative if there is more than one INCDEF record per module. History This comment class subtype is a Microsoft extension added for Microsoft QuickC version 2.0. Record Format The subrecord format is: 1 2 2 03 EXTDEF LINNUM Padding Delta Delta The EXTDEF Delta and LINNUM Delta fields are signed. Padding (zeros) is added by Microsoft QuickC to allow for expansion of the object module during incremental compilation and linking. Note: Negative deltas are allowed. Tool Interface Standards (TIS) OMF Specification, Version 1.1 17
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Relocatable Object Module Format (OMF) Specification

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