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268 palkovsky 1
/*
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 * Copyright (C) 2005 Ondrej Palkovsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1264 jermar 29
/**
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 * @file    symtab.c
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 * @brief   Kernel symbol resolver.
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 */
268 palkovsky 33
 
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#include <symtab.h>
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#include <typedefs.h>
292 jermar 36
#include <arch/byteorder.h>
582 palkovsky 37
#include <func.h>
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#include <print.h>
268 palkovsky 39
 
1264 jermar 40
/** Return entry that seems most likely to correspond to argument.
268 palkovsky 41
 *
404 jermar 42
 * Return entry that seems most likely to correspond
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 * to address passed in the argument.
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 *
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 * @param addr Address.
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 *
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 * @return Pointer to respective symbol string on success, NULL otherwise.
268 palkovsky 48
 */
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char * get_symtab_entry(__native addr)
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{
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    count_t i;
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292 jermar 53
    for (i=1;symbol_table[i].address_le;++i) {
338 jermar 54
        if (addr < __u64_le2host(symbol_table[i].address_le))
268 palkovsky 55
            break;
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    }
338 jermar 57
    if (addr >= __u64_le2host(symbol_table[i-1].address_le))
268 palkovsky 58
        return symbol_table[i-1].symbol_name;
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    return NULL;
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}
582 palkovsky 61
 
1264 jermar 62
/** Find symbols that match the parameter forward and print them.
601 palkovsky 63
 *
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 * @param name - search string
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 * @param startpos - starting position, changes to found position
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 * @return Pointer to the part of string that should be completed or NULL
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 */
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static char * symtab_search_one(const char *name, int *startpos)
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{
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    int namelen = strlen(name);
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    char *curname;
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    int i,j;
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    int colonoffset = -1;
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    for (i=0;name[i];i++)
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        if (name[i] == ':') {
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            colonoffset = i;
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            break;
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        }
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    for (i=*startpos;symbol_table[i].address_le;++i) {
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        /* Find a ':' in name */
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        curname = symbol_table[i].symbol_name;
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        for (j=0; curname[j] && curname[j] != ':'; j++)
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            ;
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        if (!curname[j])
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            continue;
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        j -= colonoffset;
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        curname += j;
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        if (strlen(curname) < namelen)
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            continue;
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        if (strncmp(curname, name, namelen) == 0) {
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            *startpos = i;
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            return curname+namelen;
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        }
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    }
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    return NULL;
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}
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582 palkovsky 100
/** Return address that corresponds to the entry
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 *
601 palkovsky 102
 * Search symbol table, and if there is one match, return it
582 palkovsky 103
 *
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 * @param name Name of the symbol
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 * @return 0 - Not found, -1 - Duplicate symbol, other - address of symbol
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 */
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__address get_symbol_addr(const char *name)
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{
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    count_t found = 0;
601 palkovsky 110
    __address addr = NULL;
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    char *hint;
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    int i;
582 palkovsky 113
 
601 palkovsky 114
    i = 0;
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    while ((hint=symtab_search_one(name, &i))) {
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        if (!strlen(hint)) {
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            addr =  __u64_le2host(symbol_table[i].address_le);
582 palkovsky 118
            found++;
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        }
601 palkovsky 120
        i++;
582 palkovsky 121
    }
601 palkovsky 122
    if (found > 1)
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        return ((__address) -1);
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    return addr;
582 palkovsky 125
}
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601 palkovsky 127
/** Find symbols that match parameter and prints them */
582 palkovsky 128
void symtab_print_search(const char *name)
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{
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    int i;
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    __address addr;
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    char *realname;
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601 palkovsky 134
 
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    i = 0;
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    while (symtab_search_one(name, &i)) {
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        addr =  __u64_le2host(symbol_table[i].address_le);
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        realname = symbol_table[i].symbol_name;
1224 cejka 139
        printf("%.*p: %s\n", sizeof(__address) * 2, addr, realname);
601 palkovsky 140
        i++;
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    }
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}
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/** Symtab completion
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 *
1248 jermar 146
 * @param input - Search string, completes to symbol name
601 palkovsky 147
 * @returns - 0 - nothing found, 1 - success, >1 print duplicates
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 */
616 palkovsky 149
int symtab_compl(char *input)
601 palkovsky 150
{
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    char output[MAX_SYMBOL_NAME+1];
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    int startpos = 0;
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    char *foundtxt;
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    int found = 0;
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    int i;
616 palkovsky 156
    char *name = input;
601 palkovsky 157
 
616 palkovsky 158
    /* Allow completion of pointers  */
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    if (name[0] == '*' || name[0] == '&')
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        name++;
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601 palkovsky 162
    /* Do not print everything */
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    if (!strlen(name))
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        return 0;
616 palkovsky 165
 
601 palkovsky 166
 
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    output[0] = '\0';
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    while ((foundtxt = symtab_search_one(name, &startpos))) {
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        startpos++;
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        if (!found)
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            strncpy(output, foundtxt, strlen(foundtxt)+1);
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        else {
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            for (i=0; output[i] && foundtxt[i] && output[i]==foundtxt[i]; i++)
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                ;
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            output[i] = '\0';
582 palkovsky 177
        }
601 palkovsky 178
        found++;
582 palkovsky 179
    }
601 palkovsky 180
    if (!found)
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        return 0;
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602 palkovsky 183
    if (found > 1 && !strlen(output)) {
601 palkovsky 184
        printf("\n");
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        startpos = 0;
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        while ((foundtxt = symtab_search_one(name, &startpos))) {
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            printf("%s\n", symbol_table[startpos].symbol_name);
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            startpos++;
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        }
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    }
616 palkovsky 191
    strncpy(input, output, MAX_SYMBOL_NAME);
601 palkovsky 192
    return found;
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582 palkovsky 194
}