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How to translate CMM-style command Data.Long(ZSD:&regAddr) in jython script

Hi,

I 'm translating a cmm script to a jython script . Need to translate CMM-style command Data.Long(ZSD:&regAddr) .Not sure how to do it, especially about this flag ZSD. Would somebody guide me how to do it? Thanks.

Jerry

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0 Stephen Theobald over 4 years ago

Hi Jerry,

According to the Lauterbach docs on the web:
Data.Long() reads a long value (32-bit) value from memory.
and
ZSD means access the data in secure supervisor mode at virtual address location.

The Arm Debugger (DS-5 or Arm DS) offers a number of "address prefixes" to allow you to qualify an address, as described at:
developer.arm.com/.../address-space-prefixes

To read in Secure mode, specify the S: prefix on the address. The Arm Debugger will access virtual addresses by default, unless you've used the SP: or NP: address prefixes that turn off the MMU temporarily.

So the corresponding lines in Jython for
Data.Long(ZSD:&regAddr)
would be:

ec = debugger.getCurrentExecutionContext()
value = ec.getMemoryService().readMemory32(S:address)

Or the equivalent:

value = debugger.readMemory(S:address, 4)

Hope this helps,
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0 Stephen Theobald over 4 years ago

Hi Jerry,

According to the Lauterbach docs on the web:
Data.Long() reads a long value (32-bit) value from memory.
and
ZSD means access the data in secure supervisor mode at virtual address location.

The Arm Debugger (DS-5 or Arm DS) offers a number of "address prefixes" to allow you to qualify an address, as described at:
developer.arm.com/.../address-space-prefixes

To read in Secure mode, specify the S: prefix on the address. The Arm Debugger will access virtual addresses by default, unless you've used the SP: or NP: address prefixes that turn off the MMU temporarily.

So the corresponding lines in Jython for
Data.Long(ZSD:&regAddr)
would be:

ec = debugger.getCurrentExecutionContext()
value = ec.getMemoryService().readMemory32(S:address)

Or the equivalent:

value = debugger.readMemory(S:address, 4)

Hope this helps,
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0 Jerry Huang over 4 years ago in reply to Stephen Theobald

Hi Stephen,

Thanks a lot for replying.

There is Syntax Error.

source "init.py"
ERROR(?): SyntaxError: no viable alternative at input ':'
File "init.py", line 21
status = debugger.readMemory(S:regAddr, 4)
^
ERROR(CMD656): The script init.py failed to complete due to an error during execution of the script
source "init.py"
ERROR(?): SyntaxError: no viable alternative at input ':'
File "init.py", line 23
status = ec.getMemoryService().readMemory32(S:regaddr)
^
ERROR(CMD656): The script init.py failed to complete due to an error during execution of the script

Seems we can fix like this:

a = "S:" + str(regaddr)
ec = debugger.getCurrentExecutionContext()
status = ec.getMemoryService().readMemory32(a)

BTW, if we use debugger.readMemory. It's:

value = debugger.readMemory(S:address, 32)

not

value = debugger.readMemory(S:address, 4)

right?

Jerry