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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 <func.h>
  41. #include <print.h>
  42.  
  43. /** Return entry that seems most likely to correspond to argument.
  44.  *
  45.  * Return entry that seems most likely to correspond
  46.  * to address passed in the argument.
  47.  *
  48.  * @param addr Address.
  49.  *
  50.  * @return Pointer to respective symbol string on success, NULL otherwise.
  51.  */
  52. char * get_symtab_entry(unative_t addr)
  53. {
  54.     count_t i;
  55.  
  56.     for (i = 1; symbol_table[i].address_le; ++i) {
  57.         if (addr < uint64_t_le2host(symbol_table[i].address_le))
  58.             break;
  59.     }
  60.     if (addr >= uint64_t_le2host(symbol_table[i - 1].address_le))
  61.         return symbol_table[i - 1].symbol_name;
  62.     return NULL;
  63. }
  64.  
  65. /** Find symbols that match the parameter forward and print them.
  66.  *
  67.  * @param name - search string
  68.  * @param startpos - starting position, changes to found position
  69.  * @return Pointer to the part of string that should be completed or NULL
  70.  */
  71. static char * symtab_search_one(const char *name, int *startpos)
  72. {
  73.     unsigned int namelen = strlen(name);
  74.     char *curname;
  75.     int i, j;
  76.     int colonoffset = -1;
  77.  
  78.     for (i = 0; name[i]; i++)
  79.         if (name[i] == ':') {
  80.             colonoffset = i;
  81.             break;
  82.         }
  83.  
  84.     for (i = *startpos; symbol_table[i].address_le; ++i) {
  85.         /* Find a ':' in name */
  86.         curname = symbol_table[i].symbol_name;
  87.         for (j = 0; curname[j] && curname[j] != ':'; j++)
  88.             ;
  89.         if (!curname[j])
  90.             continue;
  91.         j -= colonoffset;
  92.         curname += j;
  93.         if (strlen(curname) < namelen)
  94.             continue;
  95.         if (strncmp(curname, name, namelen) == 0) {
  96.             *startpos = i;
  97.             return curname + namelen;
  98.         }
  99.     }
  100.     return NULL;
  101. }
  102.  
  103. /** Return address that corresponds to the entry
  104.  *
  105.  * Search symbol table, and if there is one match, return it
  106.  *
  107.  * @param name Name of the symbol
  108.  * @return 0 - Not found, -1 - Duplicate symbol, other - address of symbol
  109.  */
  110. uintptr_t get_symbol_addr(const char *name)
  111. {
  112.     count_t found = 0;
  113.     uintptr_t addr = NULL;
  114.     char *hint;
  115.     int i;
  116.  
  117.     i = 0;
  118.     while ((hint = symtab_search_one(name, &i))) {
  119.         if (!strlen(hint)) {
  120.             addr =  uint64_t_le2host(symbol_table[i].address_le);
  121.             found++;
  122.         }
  123.         i++;
  124.     }
  125.     if (found > 1)
  126.         return ((uintptr_t) -1);
  127.     return addr;
  128. }
  129.  
  130. /** Find symbols that match parameter and prints them */
  131. void symtab_print_search(const char *name)
  132. {
  133.     int i;
  134.     uintptr_t addr;
  135.     char *realname;
  136.  
  137.  
  138.     i = 0;
  139.     while (symtab_search_one(name, &i)) {
  140.         addr =  uint64_t_le2host(symbol_table[i].address_le);
  141.         realname = symbol_table[i].symbol_name;
  142.         printf("%.*p: %s\n", sizeof(uintptr_t) * 2, addr, realname);
  143.         i++;
  144.     }
  145. }
  146.  
  147. /** Symtab completion
  148.  *
  149.  * @param input - Search string, completes to symbol name
  150.  * @returns - 0 - nothing found, 1 - success, >1 print duplicates
  151.  */
  152. int symtab_compl(char *input)
  153. {
  154.     char output[MAX_SYMBOL_NAME + 1];
  155.     int startpos = 0;
  156.     char *foundtxt;
  157.     int found = 0;
  158.     int i;
  159.     char *name = input;
  160.  
  161.     /* Allow completion of pointers  */
  162.     if (name[0] == '*' || name[0] == '&')
  163.         name++;
  164.  
  165.     /* Do not print everything */
  166.     if (!strlen(name))
  167.         return 0;
  168.    
  169.  
  170.     output[0] = '\0';
  171.  
  172.     while ((foundtxt = symtab_search_one(name, &startpos))) {
  173.         startpos++;
  174.         if (!found)
  175.             strncpy(output, foundtxt, strlen(foundtxt) + 1);
  176.         else {
  177.             for (i = 0; output[i] && foundtxt[i] &&
  178.                  output[i] == foundtxt[i]; i++)
  179.                 ;
  180.             output[i] = '\0';
  181.         }
  182.         found++;
  183.     }
  184.     if (!found)
  185.         return 0;
  186.  
  187.     if (found > 1 && !strlen(output)) {
  188.         printf("\n");
  189.         startpos = 0;
  190.         while ((foundtxt = symtab_search_one(name, &startpos))) {
  191.             printf("%s\n", symbol_table[startpos].symbol_name);
  192.             startpos++;
  193.         }
  194.     }
  195.     strncpy(input, output, MAX_SYMBOL_NAME);
  196.     return found;
  197.    
  198. }
  199.  
  200. /** @}
  201.  */
  202.