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Annotation of Gnu-Mach/ddb/db_ext_symtab.c, revision 1.1.1.1

1.1       root        1: /* 
                      2:  * Mach Operating System
                      3:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
                      4:  * All Rights Reserved.
                      5:  * 
                      6:  * Permission to use, copy, modify and distribute this software and its
                      7:  * documentation is hereby granted, provided that both the copyright
                      8:  * notice and this permission notice appear in all copies of the
                      9:  * software, derivative works or modified versions, and any portions
                     10:  * thereof, and that both notices appear in supporting documentation.
                     11:  * 
                     12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     15:  * 
                     16:  * Carnegie Mellon requests users of this software to return to
                     17:  * 
                     18:  *  Software Distribution Coordinator  or  [email protected]
                     19:  *  School of Computer Science
                     20:  *  Carnegie Mellon University
                     21:  *  Pittsburgh PA 15213-3890
                     22:  * 
                     23:  * any improvements or extensions that they make and grant Carnegie Mellon
                     24:  * the rights to redistribute these changes.
                     25:  */
                     26: 
                     27: #include "mach_kdb.h"
                     28: #if MACH_KDB
                     29: 
                     30: #include <mach_debug.h>
                     31: 
                     32: #if    MACH_DEBUG
                     33: 
                     34: #include <mach/mach_types.h>   /* vm_address_t */
                     35: #include <mach/std_types.h>    /* pointer_t */
                     36: #include <mach/vm_param.h>
                     37: #include <vm/vm_map.h>
                     38: #include <vm/vm_kern.h>
                     39: #include <kern/host.h>
                     40: #include <kern/task.h>
                     41: #include <ddb/db_sym.h>
                     42: 
                     43: 
                     44: 
                     45: /*
                     46:  *     Loads a symbol table for an external file into the kernel debugger.
                     47:  *     The symbol table data is an array of characters.  It is assumed that
                     48:  *     the caller and the kernel debugger agree on its format.
                     49:  */
                     50: kern_return_t
                     51: host_load_symbol_table(host, task, name, symtab, symtab_count)
                     52:        host_t          host;
                     53:        task_t          task;
                     54:        char *          name;
                     55:        pointer_t       symtab;
                     56:        unsigned int    symtab_count;
                     57: {
                     58:        kern_return_t   result;
                     59:        vm_offset_t     symtab_start;
                     60:        vm_offset_t     symtab_end;
                     61:        vm_map_t        map;
                     62:        vm_map_copy_t   symtab_copy_object;
                     63: 
                     64:        if (host == HOST_NULL)
                     65:            return (KERN_INVALID_ARGUMENT);
                     66: 
                     67:        /*
                     68:         * Copy the symbol table array into the kernel.
                     69:         * We make a copy of the copy object, and clear
                     70:         * the old one, so that returning error will not
                     71:         * deallocate the data twice.
                     72:         */
                     73:        symtab_copy_object = (vm_map_copy_t) symtab;
                     74:        result = vm_map_copyout(
                     75:                        kernel_map,
                     76:                        &symtab_start,
                     77:                        vm_map_copy_copy(symtab_copy_object));
                     78:        if (result != KERN_SUCCESS)
                     79:            return (result);
                     80: 
                     81:        symtab_end = symtab_start + symtab_count;
                     82: 
                     83:        /*
                     84:         * Add the symbol table.
                     85:         * Do not keep a reference for the task map.    XXX
                     86:         */
                     87:        if (task == TASK_NULL)
                     88:            map = VM_MAP_NULL;
                     89:        else
                     90:            map = task->map;
                     91:        if (!X_db_sym_init((char *)symtab_start,
                     92:                        (char *)symtab_end,
                     93:                        name,
                     94:                        (char *)map))
                     95:        {
                     96:            /*
                     97:             * Not enough room for symbol table - failure.
                     98:             */
                     99:            (void) vm_deallocate(kernel_map,
                    100:                        symtab_start,
                    101:                        symtab_count);
                    102:            return (KERN_FAILURE);
                    103:        }
                    104: 
                    105:        /*
                    106:         * Wire down the symbol table
                    107:         */
                    108:        (void) vm_map_pageable(kernel_map,
                    109:                symtab_start,
                    110:                round_page(symtab_end),
                    111:                VM_PROT_READ|VM_PROT_WRITE);
                    112: 
                    113:        /*
                    114:         * Discard the original copy object
                    115:         */
                    116:        vm_map_copy_discard(symtab_copy_object);
                    117: 
                    118:        return (KERN_SUCCESS);
                    119: }
                    120: 
                    121: #endif /* MACH_DEBUG */
                    122: 
                    123: #endif MACH_KDB

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