Unligned access problem with Alpha tru64

[Ivan78]

Hello All,
i have a problem with C language.
in any case when i try access to memory address the OS display a
following message:
unligned access
to resolve this problem i changed following instruction:

tpbyteSrcPos = pstSrcRec;
tpbyteDestPos = pstDestRec;
ENDIAN_RtxHostSrcToDest( (HOST_RTX_STR*)tpbyteSrcPos,
(HOST_RTX_STR*)tpbyy
teDestPos );


into:

tpbyteSrcPos = pstSrcRec;
tpbyteDestPos = pstDestRec;

memcpy(&TempSrcHostRtx, tpbyteSrcPos, sizeof(TempSrcHostRtx));
memcpy(&TempDestHostRtx, tpbyteDestPos,
sizeof(TempDestHostRtx));

ENDIAN_RtxHostSrcToDest( &TempSrcHostRtx, &TempDestHostRtx );

memcpy(tpbyteDestPos, &TempDestHostRtx,
sizeof(TempDestHostRtx));


somebody kown because i have an unaligned access??
somebody know why do i resolve this problem when i use memcpy function?

can I resolve this problem without changed first version of the code??

sorry for my English
thanks
Ivan

 

[Walter Roberson]

i have a problem with C language.
in any case when i try access to memory address the OS display a
following message:
unligned access
to resolve this problem i changed following instruction:

tpbyteSrcPos = pstSrcRec;
tpbyteDestPos = pstDestRec;
ENDIAN_RtxHostSrcToDest( (HOST_RTX_STR*)tpbyteSrcPos,
(HOST_RTX_STR*)tpbyyteDestPos );

somebody kown because i have an unaligned access??

Sorry, you do not show us the code for ENDIAN_RtxHostSrcToDest
and that appears to be specific to your program (I do not find
any reference to it via google.)

We will need the code for ENDIAN_RtxHostSrcToDest and we will
need to know what the type is of HOST_RTX_STR .