An 'invalid opcode' simply means that the opcode doesn't fit any of the
pre-defined instructions in the opcode table in the disassembler i.e. it's not
being recognized by the disassembler. This can be, but is not always a Bad
Thing. Depending on which version of CodeWarrior you are using, you may be using
an older version of the disassembler which doesn't recognize a few of the traps
and instructions. Some of these have been fixed in CW Palm 7, others internally.
You may want to disassemble in these two ways:
a) use the linker - while in non-debugging mode, select Disassemble from the
Project menu.
b) use the disassembler - while debugging, in the debugger window, select View
As Assembly or Mixed.
Do a compare of both. If both don't match up, can you send the code to us at
[EMAIL PROTECTED]? This would be a bug and I'd like get this fixed.
-- jkl
----- Original Message -----
From: "S S" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent: Monday, April 16, 2001 11:51 AM
Subject: What is "Invalid opcode"?
> Hello!
>
> I have this piece of code:
> int myint;
> Handle h_str;
> CharPtr progn_string;
>
> switch (myint){
> case 1:
> h_str = DmGetResource('tSTR', 1010);
> progn_string = MemHandleLock(h_str);
> /* .......blablabla.......... */
> break;
> case 2:
> h_str = DmGetResource('tSTR', 1020);
> progn_string = MemHandleLock(h_str);
> /* .......blablabla.......... */
> break;
>
> Then I disassembled this code and get:
>
> switch (myint){
> case 1:
> 00000156: 4FEF 0016 lea 22(a7),a7
> 0000015A: 3004 move.w d4,d0
> 0000015C: 0C40 000C cmpi.w #12,d0
> 00000160: 6200 0548 bhi.w *+1354
> ; 0x000006aa
> 00000164: D040 add.w d0,d0
> 00000166: 303B 0006 move.w (6,pc,d0.w),d0
> 0000016A: 4EFB 0002 jmp (2,pc,d0.w)
> 0000016E: 053C 001A 0088 btst d2,#1704072
> 00000174: 00F6 0164 dc.w 0x00f6
> ; Invalid opcode
> 00000178: 01D2 bset d0,(a2)
> 0000017A: 0240 02AE andi.w #0x2ae,d0
> 0000017E: 031C btst d1,(a4)+
> 00000180: 038A bclr d1,a2
> 00000182: 03F8 0466 bset d1,0x00000466
> h_str = DmGetResource('tSTR', 1010);
> 00000186: 04D2 3F3C dc.w 0x04d2
> ; Invalid opcode
> 0000018A: 03F2 2F3C 7453 bset
> d1,([1951618130,a2],d2.l*8)
> 5452
> 00000192: 4E4F trap #15
> 00000194: A05F sysTrapDmGetResource
> 00000196: 2448 movea.l a0,a2
> progn_string = MemHandleLock(h_str);
> 00000198: 2F0A move.l a2,-(a7)
> 0000019A: 4E4F trap #15
> 0000019C: A021 sysTrapMemHandleLock
>
>
> I wonder, what does "Invalid opcode" mean. My
> application work fine, but I have two "Invalid opcode"
> in "case 1" and I have NO "Invalid opcode" in "case 2"
>
> case 2:
> 000001EE: 4FEF 003A lea 58(a7),a7
> 000001F2: 6000 04B6 bra.w *+1208
> ; 0x000006aa
> h_str = DmGetResource('tSTR', 1020);
> 000001F6: 3F3C 03FC move.w #1020,-(a7)
> 000001FA: 2F3C 7453 5452 move.l
> #1951618130,-(a7)
> 00000200: 4E4F trap #15
> 00000202: A05F sysTrapDmGetResource
> 00000204: 2448 movea.l a0,a2
> progn_string = MemHandleLock(h_str);
> 00000206: 2F0A move.l a2,-(a7)
> 00000208: 4E4F trap #15
> 0000020A: A021 sysTrapMemHandleLock
> 0000020C: 2648 movea.l a0,a3
>
> Thanks,
> Soj
>
>
> __________________________________________________
> Do You Yahoo!?
> Get email at your own domain with Yahoo! Mail.
> http://personal.mail.yahoo.com/
>
> --
> For information on using the Palm Developer Forums, or to unsubscribe, please
see http://www.palmos.com/dev/tech/support/forums/
>
>
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palmos.com/dev/tech/support/forums/
