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