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what did these Assembly codes mean?
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what did these Assembly codes mean?
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duoduo duoduo
over 7 years ago
Note: This was originally posted on 3rd February 2009 at
http://forums.arm.com
Dear all,
i debugged my codes on AXD, and the microcontroller is arm7 s3c44b0.
it ran well at the beginning, into the "main" function, did some initializations, and so on.
and then it ran into the disassembly mode. the Assembly codes were below:
026ec27c [0x2e2e2e2e] cdpcs p14,0x2,c2,c14,c14,1
026ec280 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec284 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec288 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec28c [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec290 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec294 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec298 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec29c [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec2a0 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec2a4 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec2a8 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec2ac [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec2b0 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
026ec2b4 [0x69696969] stmvsdb r9!,{r0,r3,r5,r6,r8,r11,r13,r14}^
why this happened?according to these Assembly codes, can anybody tell me what was the microcontroller doing?
many thanks!
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Peter Harris
over 7 years ago
+1
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Note: This was originally posted on 3rd February 2009 at http://forums.arm.com It is possible that you are trying to write a software breakpoint in to a flash memory; this won't work and has a habit of...
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Jacob Bramley
over 7 years ago
Note: This was originally posted on 3rd February 2009 at
http://forums.arm.com
It's likely that the code isn't intended for execution. Notice that the instruction code is "0x69696969". I suspect that this is a default value for some memory, perhaps to be used for measuring the stack depth in your debugger.
Having said that, it is _possible_ that it's valid code, but it's seriously unlikely.
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Jacob Bramley
over 7 years ago
Note: This was originally posted on 3rd February 2009 at
http://forums.arm.com
It's likely that the code isn't intended for execution. Notice that the instruction code is "0x69696969". I suspect that this is a default value for some memory, perhaps to be used for measuring the stack depth in your debugger.
Having said that, it is _possible_ that it's valid code, but it's seriously unlikely.
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