disassembler man page on DigitalUNIX

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disassembler(3)						       disassembler(3)

NAME
       disassembler - disassemble a machine instruction and print the results

SYNOPSIS
       int disassembler(
	       unsigned long iadr,
	       int regstyle,
	       char *(*get_symname)(unsigned long address),
	       unsigned long (*get_regvalue)(unsigned regnum),
	       unsigned (*get_bytes)(void),
	       void  (*print_header)(unsigned long iadr, unsigned instruction)
       );

PARAMETERS
       Specifies the instruction address to be	disassembled.	Specifies  how
       registers  are  named  in  the disassembly; if the value is 0, compiler
       names are used; otherwise, hardware names are used.

       The next four arguments are function pointers, most of which  give  the
       caller  some flexibility in the appearance of the disassembly. The only
       function that must be provided is get_bytes.  All other	functions  are
       optional;  pass	a NULL for each that is not needed.  Is called with no
       arguments and returns the next byte or bytes to disassemble.  Is passed
       an  address,  which is the target of a jmp, jsr, or bsr instruction. If
       NULL is returned or if get_symname is NULL, the disassembler()  routine
       prints  the  address; otherwise, the string name is printed as returned
       from get_symname.  If not NULL, is passed a register number and returns
       the current contents of the specified register. The disassembler() rou‐
       tine prints this information along with	the  instruction  disassembly.
       If  not	NULL,  is  passed the instruction address iadr and the current
       instruction  to	be  disassembled,  which  is  the  return  value  from
       get_bytes.   Print_header can use these parameters to print any desired
       information before the actual instruction disassembly is printed.

DESCRIPTION
       The disassembler() routine disassembles and prints a  machine  instruc‐
       tion on stdout.

       The  program must be linked with the object file access routine library
       libmld.a.

RETURN VALUES
       If get_bytes is NULL, the disassembler() routine returns -1  and	 errno
       is set to EINVAL; otherwise, the number of bytes that were disassembled
       is returned.

SEE ALSO
       ldfcn(4).

							       disassembler(3)
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