HP IA-64 Changing Registers and Memory, The Main Window After Reaching the Breakpoint at main+10

Ski IA-64 Simulator Reference Manual 1.0L

the Main Window. Ski tells you why it stopped and gives you statistics about program execution up to this point, as you can see in Figure 1-18.The Program Window marks the next instruction to be fetched with a greater-than symbol in the second column. If the instruction is predicated off, Ski uses an asterisk instead of a greater-than symbol, and shows the predication register in parentheses.

Figure 1-18. The Main Window After Reaching the Breakpoint at main+10

Move and resize your windows so the Main Window and Program Window don’t overlap. Now use the “ step” command or Step button to execute one instruction. Note that the greater-than symbol moves down one line: Ski keeps track of IA- 64 bundles and groups but it simulates individual instructions. You can follow the “ step” command with a (decimal) number to specify how many steps Ski should take, for example, “ step 10” to execute ten instructions. As a shortcut, shift-clicking on the Step button causes Ski to take ten steps. Most Ski commands can be abbreviated, as described in Appendix A, “Command Reference”. The step command can be abbreviated as “ s”.

1.2.11Changing Registers and Memory

To debug a program, you usually need to inspect and alter registers and memory. The first three panes in the Register Win- dow shows the registers of most concern to application programmers: user registers in the first pane, general registers in the second pane, and floating point registers in the third pane, as you can see in Figure 1-19.

Copyright © 2000 Hewlett-Packard Co. Getting Started: A Ski Tutorial 1-13