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  1. /*
  2.  * Copyright (c) 2005 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup genericdebug
  30.  * @{
  31.  */
  32.  
  33. /**
  34.  * @file
  35.  * @brief   Kernel symbol resolver.
  36.  */
  37.  
  38. #include <symtab.h>
  39. #include <byteorder.h>
  40. #include <string.h>
  41. #include <print.h>
  42. #include <arch/types.h>
  43. #include <typedefs.h>
  44.  
  45. /** Return entry that seems most likely to correspond to argument.
  46.  *
  47.  * Return entry that seems most likely to correspond
  48.  * to address passed in the argument.
  49.  *
  50.  * @param addr Address.
  51.  *
  52.  * @return Pointer to respective symbol string on success, NULL otherwise.
  53.  */
  54. char * get_symtab_entry(unative_t addr)
  55. {
  56.     count_t i;
  57.  
  58.     for (i = 1; symbol_table[i].address_le; ++i) {
  59.         if (addr < uint64_t_le2host(symbol_table[i].address_le))
  60.             break;
  61.     }
  62.     if (addr >= uint64_t_le2host(symbol_table[i - 1].address_le))
  63.         return symbol_table[i - 1].symbol_name;
  64.     return NULL;
  65. }
  66.  
  67. /** Find symbols that match the parameter forward and print them.
  68.  *
  69.  * @param name - search string
  70.  * @param startpos - starting position, changes to found position
  71.  * @return Pointer to the part of string that should be completed or NULL
  72.  */
  73. static char * symtab_search_one(const char *name, int *startpos)
  74. {
  75.     unsigned int namelen = strlen(name);
  76.     char *curname;
  77.     int i, j;
  78.     int colonoffset = -1;
  79.  
  80.     for (i = 0; name[i]; i++)
  81.         if (name[i] == ':') {
  82.             colonoffset = i;
  83.             break;
  84.         }
  85.  
  86.     for (i = *startpos; symbol_table[i].address_le; ++i) {
  87.         /* Find a ':' in name */
  88.         curname = symbol_table[i].symbol_name;
  89.         for (j = 0; curname[j] && curname[j] != ':'; j++)
  90.             ;
  91.         if (!curname[j])
  92.             continue;
  93.         j -= colonoffset;
  94.         curname += j;
  95.         if (strlen(curname) < namelen)
  96.             continue;
  97.         if (strncmp(curname, name, namelen) == 0) {
  98.             *startpos = i;
  99.             return curname + namelen;
  100.         }
  101.     }
  102.     return NULL;
  103. }
  104.  
  105. /** Return address that corresponds to the entry
  106.  *
  107.  * Search symbol table, and if there is one match, return it
  108.  *
  109.  * @param name Name of the symbol
  110.  * @return 0 - Not found, -1 - Duplicate symbol, other - address of symbol
  111.  */
  112. uintptr_t get_symbol_addr(const char *name)
  113. {
  114.     count_t found = 0;
  115.     uintptr_t addr = NULL;
  116.     char *hint;
  117.     int i;
  118.  
  119.     i = 0;
  120.     while ((hint = symtab_search_one(name, &i))) {
  121.         if (!strlen(hint)) {
  122.             addr =  uint64_t_le2host(symbol_table[i].address_le);
  123.             found++;
  124.         }
  125.         i++;
  126.     }
  127.     if (found > 1)
  128.         return ((uintptr_t) -1);
  129.     return addr;
  130. }
  131.  
  132. /** Find symbols that match parameter and prints them */
  133. void symtab_print_search(const char *name)
  134. {
  135.     int i;
  136.     uintptr_t addr;
  137.     char *realname;
  138.  
  139.  
  140.     i = 0;
  141.     while (symtab_search_one(name, &i)) {
  142.         addr =  uint64_t_le2host(symbol_table[i].address_le);
  143.         realname = symbol_table[i].symbol_name;
  144.         printf("%p: %s\n", addr, realname);
  145.         i++;
  146.     }
  147. }
  148.  
  149. /** Symtab completion
  150.  *
  151.  * @param input - Search string, completes to symbol name
  152.  * @returns - 0 - nothing found, 1 - success, >1 print duplicates
  153.  */
  154. int symtab_compl(char *input)
  155. {
  156.     char output[MAX_SYMBOL_NAME + 1];
  157.     int startpos = 0;
  158.     char *foundtxt;
  159.     int found = 0;
  160.     int i;
  161.     char *name = input;
  162.  
  163.     /* Allow completion of pointers  */
  164.     if (name[0] == '*' || name[0] == '&')
  165.         name++;
  166.  
  167.     /* Do not print everything */
  168.     if (!strlen(name))
  169.         return 0;
  170.    
  171.  
  172.     output[0] = '\0';
  173.  
  174.     while ((foundtxt = symtab_search_one(name, &startpos))) {
  175.         startpos++;
  176.         if (!found)
  177.             strncpy(output, foundtxt, strlen(foundtxt) + 1);
  178.         else {
  179.             for (i = 0; output[i] && foundtxt[i] &&
  180.                  output[i] == foundtxt[i]; i++)
  181.                 ;
  182.             output[i] = '\0';
  183.         }
  184.         found++;
  185.     }
  186.     if (!found)
  187.         return 0;
  188.  
  189.     if (found > 1 && !strlen(output)) {
  190.         printf("\n");
  191.         startpos = 0;
  192.         while ((foundtxt = symtab_search_one(name, &startpos))) {
  193.             printf("%s\n", symbol_table[startpos].symbol_name);
  194.             startpos++;
  195.         }
  196.     }
  197.     strncpy(input, output, MAX_SYMBOL_NAME);
  198.     return found;
  199.    
  200. }
  201.  
  202. /** @}
  203.  */
  204.