FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_ext_symtab.c

     /* 
      * Mach Operating System
      * Copyright (c) 1993,1992,1991,1990,1989 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    
    /*
     * HISTORY
     * $Log:        db_ext_symtab.c,v $
     * Revision 2.6  93/11/17  16:22:11  dbg
     *      Added ANSI function prototypes.
     *      [93/10/11            dbg]
     * 
     * Revision 2.5  92/08/03  17:31:11  jfriedl
     *      removed silly prototypes
     *      [92/08/02            jfriedl]
     * 
     * Revision 2.4  92/05/21  17:07:00  jfriedl
     *      tried prototypes.
     *      [92/05/20            jfriedl]
     * 
     * Revision 2.3  92/01/03  20:02:41  dbg
     *      Don't deallocate symbol-table twice if error in loading symbol
     *      table.
     *      [91/11/29            dbg]
     * 
     * Revision 2.2  91/07/31  17:30:05  dbg
     *      Created.
     *      [91/07/30  16:43:20  dbg]
     * 
     */
    #include <mach_debug.h>
    
    #if     MACH_DEBUG
    
    #include <mach/mach_types.h>    /* vm_address_t */
    #include <mach/std_types.h>     /* pointer_t */
    #include <mach/vm_param.h>
    #include <vm/vm_map.h>
    #include <vm/vm_kern.h>
    #include <vm/vm_user.h>
    #include <kern/host.h>
    #include <kern/task.h>
    #include <ddb/db_sym.h>
    
    
    
    /*
     *      Loads a symbol table for an external file into the kernel debugger.
     *      The symbol table data is an array of characters.  It is assumed that
     *      the caller and the kernel debugger agree on its format.
     */
    kern_return_t
    host_load_symbol_table(
            host_t          host,
            task_t          task,
            char *          name,
            pointer_t       symtab,
            natural_t       symtab_count)
    {
            kern_return_t   result;
            vm_offset_t     symtab_start;
            vm_offset_t     symtab_end;
            vm_map_t        map;
            vm_map_copy_t   symtab_copy_object;
    
            if (host == HOST_NULL)
                return KERN_INVALID_ARGUMENT;
    
            /*
             * Copy the symbol table array into the kernel.
             * We make a copy of the copy object, and clear
             * the old one, so that returning error will not
             * deallocate the data twice.
             */
            symtab_copy_object = (vm_map_copy_t) symtab;
            result = vm_map_copyout(
                            kernel_map,
                            &symtab_start,
                           vm_map_copy_copy(symtab_copy_object));
           if (result != KERN_SUCCESS)
               return result;
   
           symtab_end = symtab_start + symtab_count;
   
           /*
            * Add the symbol table.
            * Do not keep a reference for the task map.    XXX
            */
           if (task == TASK_NULL)
               map = VM_MAP_NULL;
           else
               map = task->map;
           if (!X_db_sym_init((char *)symtab_start,
                           (char *)symtab_end,
                           name,
                           (char *)map))
           {
               /*
                * Not enough room for symbol table - failure.
                */
               (void) vm_deallocate(kernel_map,
                           symtab_start,
                           symtab_count);
               return KERN_FAILURE;
           }
   
           /*
            * Wire down the symbol table
            */
           (void) vm_map_pageable(kernel_map,
                   symtab_start,
                   round_page(symtab_end),
                   VM_PROT_READ|VM_PROT_WRITE);
   
           /*
            * Discard the original copy object
            */
           vm_map_copy_discard(symtab_copy_object);
   
           return KERN_SUCCESS;
   }
   
   #endif  /* MACH_DEBUG */

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