SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The GDP may be directly updated by software using the MVC/MVCH instruction. The GDP points to the start of the global data section (.bss section) and always contains a byte address. The programmer is responsible for ensuring that the convention described in Section 8.2.4.15 is maintained. The GDP is shown in Figure 8-39.
| 31 | 0 |
| Global Data Pointer |
| R/W-0 |
| LEGEND: R = Readable by the MVC instruction; W = Writeable by the MVC instruction; -n = value after reset |