Using SCODB on SVR5

Symbols

After SCODB is loaded into the kernel, symbol data is automatically available. The address of a symbol, and its segment type (data or text) can always be found using the C address-of operator (&):

   debug0:4> &u
   E0000000        u      data
   debug0:5> &read
   D00A46D0        read    text

If not in the kstruct file, data symbols are assumed to be of type int, and text symbols are assumed to be of type int( ) (function returning an integer). This type can be modified using the declare command (see ``Displaying symbol and expression types''), or by the symbol being present in the kstruct file.

The value of a symbol with a value type (in other words, not a structure or union) can be obtained quite simply:

   debug0:6> sysdump_selective
   1

Be careful not to confuse the value of a symbol with its address:

   debug0:6> &sysdump_selective
   C0414574	sysdump_selective data