Red Hat ENTERPRISE LINUX 4 - DEVELOPER TOOLS GUIDE, Manual

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82 Chapter 10. Examining Data
info mem
Print a table of all defined memory regions, with the following columns for each region.
Memory Region Number
Enabled or Disabled.
Enabled memory regions are marked with
y
. Disabled memory regions are marked with
n
.
Lo Address
The address defining the inclusive lower bound of the memory region.
Hi Address
The address defining the exclusive upper bound of the memory region.
Attributes
The list of attributes set for this memory region.
10.13.1. Attributes
10.13.1.1. Memory Access Mode
The access mode attributes set whether gdb may make read or write accesses to a memory region.
While these attributes prevent gdb from performing invalid memory accesses, they do nothing to
prevent the target system, I/O DMA, etc. from accessing memory.
ro
Memory is read only.
wo
Memory is write only.
rw
Memory is read/write. This is the default.
10.13.1.2. Memory Access Size
The acccess size attributes tells gdb to use specific sized accesses in the memory region. Often memory
mapped device registers require specific sized accesses. If no access size attribute is specified, gdb may
use accesses of any size.
8
Use 8 bit memory accesses.
16
Use 16 bit memory accesses.
32
Use 32 bit memory accesses.