RAM 6.0 BUX II Series Betriebsanweisung Seite 134

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VxWorks
BSP Developer’s Guide, 6.0
126
image instead of the bootrom image. If bootrom_uncmp is the target image, the
image contains the full information and no tmp.o is available.
4.3 Advanced Debugging Techniques
This section presents the more advanced debugging techniques available to a BSP
developer.
4.3.1 Symbols
When the OCD device is connected to the target board for debugging, the normal
procedure is to load both the image and symbols from a file on the development
host then start execution of the image. However, during the boot ROM stage of BSP
development, it may be necessary to debug the image exactly as-is, without the
additional processor initialization that the debugger requires.
To accomplish this, the boot image is programmed into flash memory on the target,
but a copy is kept on the host for use during debugging. The OCD device reads the
copy on the host in order to obtain symbol information. Care should be taken to
insure that the copy of the image resident on the host matches the copy
programmed into flash.
4.3.2 Breakpoints
An OCD device provides debugging support for all stages of BSP development,
using methods similar to a standard application debugger. However, to make full
use of the OCD device's debugging capability, it is necessary to understand the
nature of breakpoints.
There are two kinds of breakpoints available—software breakpoints and hardware
breakpoints.
NOTE: The methods discussed in this section require an on-chip debugging (OCD)
device. For more information on basic debugging techniques, see 4.2 Basic
Debugging Techniques, p.116.
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