3.1. User process models on AIX
Starting with AIX Version 4.3, AIX supports two user process models, 32- and 64-bit, which we explain in the following sections:
Section 3.2, “The 32-bit user process model” on page 109
Section 3.3, “The 64-bit user process model” on page 130
Before explaining these models in detail, we provide a short introduction in this section. As shown in Figure 3-1, there are four combinations of kernel and hardware support of 32- and 64-bit support.
Figure 3-1. Hardware, kernel, and user process relationships
If the hardware bit mode is 32-bit, then 64-bit user processes cannot run on the 32-bit kernel (represented as ...