Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Thu, 03 Nov 2005 08:02:03 -0600

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Andrew Johnson wrote:

I see 64 bit as a WIBNIF at present but not something we should delay

R3.14.8 for. Since we've already checked the config files in they

should stay, but we don't advise use in production systems or for

anyone who isn't prepared to do some debugging.

- Andrew

Lets see if I can summarize the 64 bit issue.

When solarissparc and linux are built as "native 64". The following is true
int  is 32 bits
long is 64 bits
u nsigned is 32 bits

This they are both the same.

exampleApp works on linux64
exampleApp crashes on solaris

I traced the crash to db_access.c

   case(oldDBR_TIME_DOUBLE):
       {

 struct dbr_time_double *pold=(struct dbr_time_double

*)pbuffer;

               struct {
                       DBRstatus
                       DBRtime
               } new;
               dbr_double_t *pvalue = &pold->value;

               options=DBR_STATUS | DBR_TIME;
               nRequest=0;
printf("before dbGetField pbuffer %p pold %p\n",pbuffer,pold);

 status =

dbGetField(paddr,DBR_DOUBLE,&new,&options,&nRequest,

                       pfl);
printf("after dbGetField pold %p\n",pold);

before dbGetField pbuffer 1001aa110 pold 1001aa110
after dbGetField pold 0

Note that pold, which is on the stack, was overwritten.

Without a lot of work, base is not ready for native 64 applications.

Marty

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System