mmap() on 64 bit m/c

UNIX Solaris
1

Dear Experts,

i have a problem related to mmap(), when i run my program on sun for 64 bit which is throwing SIGBUS when it encounters mmap() function, what is the reason how to resolve this one, because it is working for 32 bit.

with regards,
vidya.

2

Can have the scrrenshot with the error that you see exactly?

3

sorry for the delayed reply,
please help me i am trying like this, though this is one sample test,
iam opening the two files one for reading and one for writing, and i am checking like this

if((input = open(argv[1], O_RDONLY)) == -1)
  fprintf(stderr, "%s: Error: opening file: %s\n", PACKAGE, argv[1]), exit(1);

 if((output = open(argv[2], O_RDWR|O_CREAT|O_TRUNC, 0666)) == -1)
  fprintf(stderr, "%s: Error: opening file: %s\n", PACKAGE, argv[2]), exit(1);

   source = (char *)mmap((char *)0, filesize, PROT_READ, MAP_SHARED,   input, 0);
printf("\n address of source==%p",source);
 if(source[0] ==-1)
  fprintf(stderr, "Error mapping input file: %s\n", argv[1]), exit(1);

target =(char *) mmap((char  *)0, filesize, PROT_WRITE, MAP_SHARED, output, 0);

printf("\n address of target==%d",target);
 if(target[0]==-1) //problem here
  fprintf(stderr, "Error mapping ouput file: %s\n", argv[2]), exit(1);

as i am opening both of them and checking instead of MAP_FAILED for the failure to target[0]==-1 ,
my question is what exactly is the data structure that mmap returns when i test for read it is successfull and for write it is not and also
if i change that to
if(target==(void*)-1 ) it returns successfull,
because in my code they have used
target[0]==-1 which is failing and results in sigbus if i replace it with
if(target==MAP_FAILED)
it is not even going for failure nor the sucess,
and fails some where in the reading. so what is the reason of sigbus
please solve my problem