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Chapter 9 - CFM-68K Application and Shared Library Structure

CFM-68K Application Structure

Although CFM-68K runtime shared libraries are virtually identical to their PowerPC counterparts, CFM-68K runtime applications are hybrids that retain the segmented form of classic 68K applications.

CFM-68K runtime applications use some classic 68K structures ('CODE' resources, for example), but many of these structures have been modified for the CFM-based architecture. CFM-68K applications have different segment headers and jump tables, as well as a new table for transition vectors. The %A5Init segment does not exist in CFM-68K applications, and the 'CODE'0 resource does not hold the jump table. The following sections describe the CFM-68K application structure in detail.

Note

If you are not familiar with the structure of classic 68K applications, you may want to refer to Chapter 10, "Classic 68K Runtime Architecture," as you read this section.

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Subtopics

The Segment Header

The Jump Table

Transition Vectors and the Transition Vector Table

The 'CODE' 0 Resource

The 'CODE' 6 Resource

The 'rseg' 0 Resource

The 'rseg' 1 Resource