Filter
Top Products
Copyright © 2000 Hewlett-Packard Co. Debugging 8-3
Ski IA-64 Simulator Reference Manual 1.0L
8.1.3 Notes on Assignment
8.1.3.1 Address Alignment
Ski aligns addresses on natural boundaries: two-byte quantities are aligned on addresses divisible by two, four-byte quan-
tities are aligned on addresses divisible by four, and eight-byte quantities are aligned on addresses divisible by eight. For
example, the command
=4 __data_start+1 0x12345678
results in the message
Non word-aligned address. Aligned to 0x6000000000001000
and the value is assigned starting one byte before the requested address. (“__data_start” is a program-defined symbol
for 0x6000000000001000.)
8.1.3.2 Bit-encoded Registers
Many registers are bit-encoded. You can assign to individual bits or to entire registers. For example, you can set the psr.it
bit with this:
= psr.it 1
and you can set the entire Processor Status Register (psr) with this:
= psr 1234567890abcdef
A complete list of the registers and bits Ski recognizes is in Section B.1, “IA-64 Registers”.
8.1.3.3 Page Allocation
Virtual memory is simulated only for system-mode programs. In system-mode, your program is responsible for page allo-
cation. In application-mode, Ski handles page allocation for you. Either way, if you try to assign data to a non-existent
page using the assignment commands, Ski will refuse, with an error message. The assignment commands never cause a
TLB miss or replacement.
Figure 8-2. The Program After Assigning a String in
ski