bugSimulavr: an AVR simulator - Bugs: bug #46129, Simulation for atmega1284 fails on...

 
 

bug #46129: Simulation for atmega1284 fails on elpm

Submitter:  None
Submitted:  Mon 05 Oct 2015 12:44:07 PM UTC
   
 
Category:  Simulation Severity:  3 - Normal
Item Group:  None Status:  Invalid
Privacy:  Public Assigned to:  zfrdh
Originator Email:  * -email is unavailable- Open/Closed:  Closed
Component Version:  * simulavr
* Mandatory Fields

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Mon 05 Oct 2015 01:40:00 PM UTC, comment #1: 

Problem is not reproducible. Tested with small c testcode as below with following instruction:
simulavr -d atmega1284 -f master.o  --trace=/dev/stdout

results in:
master.o 0x0600: __do_copy_data                 LDI R17, 0x01
master.o 0x0602: __do_copy_data+0x1             LDI R26, 0x00
master.o 0x0604: __do_copy_data+0x2             LDI R27, 0x01
master.o 0x0606: __do_copy_data+0x3             LDI R30, 0x46
master.o 0x0608: __do_copy_data+0x4             LDI R31, 0x39
master.o 0x060a: __do_copy_data+0x5             LDI R16, 0x00
master.o 0x060c: __do_copy_data+0x6             OUT 0x3b, R16
master.o 0x060e: __do_copy_data+0x7             RJMP 614
master.o 0x060e: __do_copy_data+0x7             CPU-waitstate
master.o 0x0614: __do_copy_data+0xa             CPI R26, 0x12 SREG=[--HS-N-C]
master.o 0x0616: __do_copy_data+0xb             CPC R27, R17 SREG=[--HS-N-C]
master.o 0x0618: __do_copy_data+0xc             BRNE ->0xfff6 __do_copy_data+0x8            
master.o 0x0618: __do_copy_data+0xc             CPU-waitstate
master.o 0x0610: __do_copy_data+0x8             ELPM R0, Z+  Flash[0x3946]
master.o 0x0610: __do_copy_data+0x8             CPU-waitstate
master.o 0x0610: __do_copy_data+0x8             CPU-waitstate
master.o 0x0612: __do_copy_data+0x9             ST X+, R0
master.o 0x0612: __do_copy_data+0x9             CPU-waitstate
master.o 0x0614: __do_copy_data+0xa             CPI R26, 0x12 SREG=[--HS-N-C]
master.o 0x0616: __do_copy_data+0xb             CPC R27, R17 SREG=[--HS-N-C]
master.o 0x0618: __do_copy_data+0xc             BRNE ->0xfff6 __do_copy_data+0x8


elpm is handled as expected.

If the problem is still present, feel free to reopen the entry again.
Please use the actual git master! Any older version is not maintained!

Klaus Rudolph <zfrdh>
Group administrator
Mon 05 Oct 2015 12:44:07 PM UTC, original submission:  

Please find below a trace log and fragment of listing where simulation fails
----------- trace log --------------
sim.elf 0x01ee: __do_copy_data                 LDI R17, 0x07
sim.elf 0x01f0: __do_copy_data+0x1             LDI R26, 0x00
sim.elf 0x01f2: __do_copy_data+0x2             LDI R27, 0x01
sim.elf 0x01f4: __do_copy_data+0x3             LDI R30, 0xac
sim.elf 0x01f6: __do_copy_data+0x4             LDI R31, 0x43
sim.elf 0x01f8: __do_copy_data+0x5             LDI R16, 0x00
sim.elf 0x01fa: __do_copy_data+0x6             OUT 0x3b, R16
sim.elf 0x01fc: __do_copy_data+0x7             RJMP 202
sim.elf 0x01fc: __do_copy_data+0x7             CPU-waitstate
sim.elf 0x0202: __do_copy_data+0xa             CPI R26, 0x90 SREG=[-------C]
sim.elf 0x0204: __do_copy_data+0xb             CPC R27, R17 SREG=[--HS-N-C]
sim.elf 0x0206: __do_copy_data+0xc             BRNE ->0xfff6 _ZN6cojson5utils7abuffer3getERc+0x4f
sim.elf 0x0206: __do_copy_data+0xc             CPU-waitstate
sim.elf 0x01fe: __do_copy_data+0x8             Invalid Instruction!

----------- listing --------------

000001ee <__do_copy_data>:
     1ee: 17 e0       ldi r17, 0x07 ; 7
     1f0: a0 e0       ldi r26, 0x00 ; 0
     1f2: b1 e0       ldi r27, 0x01 ; 1
     1f4: ec ea       ldi r30, 0xAC ; 172
     1f6: f3 e4       ldi r31, 0x43 ; 67
     1f8: 00 e0       ldi r16, 0x00 ; 0
     1fa: 0b bf       out 0x3b, r16 ; 59
     1fc: 02 c0       rjmp .+4      ; 0x202 <__do_copy_data+0x14>
     1fe: 07 90       elpm r0, Z+
     200: 0d 92       st X+, r0
     202: a0 39       cpi r26, 0x90 ; 144
     204: b1 07       cpc r27, r17
     206: d9 f7       brne .-10     ; 0x1fe <__do_copy_data+0x10>

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    Date Changed by Updated Field Previous Value => Replaced by
    2015-10-05 zfrdh StatusNone Invalid
        Assigned toNone zfrdh
        Open/ClosedOpen Closed

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