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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. #include <errno.h>
  45.  
  46. /** Get name of symbol that seems most likely to correspond to address.
  47.  *
  48.  * @param addr  Address.
  49.  * @param name  Place to store pointer to the symbol name.
  50.  *
  51.  * @return  Zero on success or negative error code, ENOENT if not found,
  52.  *      ENOTSUP if symbol table not available.
  53.  */
  54. int symtab_name_lookup(unative_t addr, char **name)
  55. {
  56. #ifdef CONFIG_SYMTAB
  57.     count_t i;
  58.  
  59.     for (i = 1; symbol_table[i].address_le; ++i) {
  60.         if (addr < uint64_t_le2host(symbol_table[i].address_le))
  61.             break;
  62.     }
  63.     if (addr >= uint64_t_le2host(symbol_table[i - 1].address_le)) {
  64.         *name = symbol_table[i - 1].symbol_name;
  65.         return EOK;
  66.     }
  67.  
  68.     *name = NULL;
  69.     return ENOENT;
  70. #else
  71.     *name = NULL;
  72.     return ENOTSUP;
  73. #endif
  74. }
  75.  
  76. /** Lookup symbol by address and format for display.
  77.  *
  78.  * Returns name of closest corresponding symbol, "Not found" if none exists
  79.  * or "N/A" if no symbol information is available.
  80.  *
  81.  * @param addr  Address.
  82.  * @param name  Place to store pointer to the symbol name.
  83.  *
  84.  * @return  Pointer to a human-readable string.
  85.  */
  86. char *symtab_fmt_name_lookup(unative_t addr)
  87. {
  88.     int rc;
  89.     char *name;
  90.  
  91.     rc = symtab_name_lookup(addr, &name);
  92.     switch (rc) {
  93.     case EOK: return name;
  94.     case ENOENT: return "Not found";
  95.     default: return "N/A";
  96.     }
  97. }
  98.  
  99. #ifdef CONFIG_SYMTAB
  100.  
  101. /** Find symbols that match the parameter forward and print them.
  102.  *
  103.  * @param name - search string
  104.  * @param startpos - starting position, changes to found position
  105.  * @return Pointer to the part of string that should be completed or NULL
  106.  */
  107. static char * symtab_search_one(const char *name, int *startpos)
  108. {
  109.     unsigned int namelen = strlen(name);
  110.     char *curname;
  111.     int i, j;
  112.     int colonoffset = -1;
  113.  
  114.     for (i = 0; name[i]; i++)
  115.         if (name[i] == ':') {
  116.             colonoffset = i;
  117.             break;
  118.         }
  119.  
  120.     for (i = *startpos; symbol_table[i].address_le; ++i) {
  121.         /* Find a ':' in name */
  122.         curname = symbol_table[i].symbol_name;
  123.         for (j = 0; curname[j] && curname[j] != ':'; j++)
  124.             ;
  125.         if (!curname[j])
  126.             continue;
  127.         j -= colonoffset;
  128.         curname += j;
  129.         if (strlen(curname) < namelen)
  130.             continue;
  131.         if (strncmp(curname, name, namelen) == 0) {
  132.             *startpos = i;
  133.             return curname + namelen;
  134.         }
  135.     }
  136.     return NULL;
  137. }
  138.  
  139. #endif
  140.  
  141. /** Return address that corresponds to the entry
  142.  *
  143.  * Search symbol table, and if there is one match, return it
  144.  *
  145.  * @param name  Name of the symbol
  146.  * @param addr  Place to store symbol address
  147.  *
  148.  * @return  Zero on success, ENOENT - not found, EOVERFLOW - duplicate
  149.  *      symbol, ENOTSUP - no symbol information available.
  150.  */
  151. int symtab_addr_lookup(const char *name, uintptr_t *addr)
  152. {
  153. #ifdef CONFIG_SYMTAB
  154.     count_t found = 0;
  155.     char *hint;
  156.     int i;
  157.  
  158.     i = 0;
  159.     while ((hint = symtab_search_one(name, &i))) {
  160.         if (!strlen(hint)) {
  161.             *addr =  uint64_t_le2host(symbol_table[i].address_le);
  162.             found++;
  163.         }
  164.         i++;
  165.     }
  166.     if (found > 1)
  167.         return EOVERFLOW;
  168.     if (found < 1)
  169.         return ENOENT;
  170.     return EOK;
  171. #else
  172.     return ENOTSUP;
  173. #endif
  174. }
  175.  
  176. /** Find symbols that match parameter and prints them */
  177. void symtab_print_search(const char *name)
  178. {
  179. #ifdef CONFIG_SYMTAB
  180.     int i;
  181.     uintptr_t addr;
  182.     char *realname;
  183.  
  184.  
  185.     i = 0;
  186.     while (symtab_search_one(name, &i)) {
  187.         addr =  uint64_t_le2host(symbol_table[i].address_le);
  188.         realname = symbol_table[i].symbol_name;
  189.         printf("%p: %s\n", addr, realname);
  190.         i++;
  191.     }
  192. #else
  193.     printf("No symbol information available.\n");
  194. #endif
  195. }
  196.  
  197. /** Symtab completion
  198.  *
  199.  * @param input - Search string, completes to symbol name
  200.  * @returns - 0 - nothing found, 1 - success, >1 print duplicates
  201.  */
  202. int symtab_compl(char *input)
  203. {
  204. #ifdef CONFIG_SYMTAB
  205.     char output[MAX_SYMBOL_NAME + 1];
  206.     int startpos = 0;
  207.     char *foundtxt;
  208.     int found = 0;
  209.     int i;
  210.     char *name = input;
  211.  
  212.     /* Allow completion of pointers  */
  213.     if (name[0] == '*' || name[0] == '&')
  214.         name++;
  215.  
  216.     /* Do not print everything */
  217.     if (!strlen(name))
  218.         return 0;
  219.    
  220.  
  221.     output[0] = '\0';
  222.  
  223.     while ((foundtxt = symtab_search_one(name, &startpos))) {
  224.         startpos++;
  225.         if (!found)
  226.             strncpy(output, foundtxt, strlen(foundtxt) + 1);
  227.         else {
  228.             for (i = 0; output[i] && foundtxt[i] &&
  229.                  output[i] == foundtxt[i]; i++)
  230.                 ;
  231.             output[i] = '\0';
  232.         }
  233.         found++;
  234.     }
  235.     if (!found)
  236.         return 0;
  237.  
  238.     if (found > 1 && !strlen(output)) {
  239.         printf("\n");
  240.         startpos = 0;
  241.         while ((foundtxt = symtab_search_one(name, &startpos))) {
  242.             printf("%s\n", symbol_table[startpos].symbol_name);
  243.             startpos++;
  244.         }
  245.     }
  246.     strncpy(input, output, MAX_SYMBOL_NAME);
  247.     return found;
  248. #else
  249.     return 0;
  250. #endif
  251. }
  252.  
  253. /** @}
  254.  */
  255.