tools/lib/symbol/kallsyms.c

   1 #include <ctype.h>
   2 #include "symbol/kallsyms.h"
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6 u8 kallsyms2elf_type(char type)
   7 {
   8         type = tolower(type);
   9         return (type == 't' || type == 'w') ? STT_FUNC : STT_OBJECT;
  10 }
  11
  12 int kallsyms__parse(const char *filename, void *arg,
  13                     int (*process_symbol)(void *arg, const char *name,
  14                                           char type, u64 start))
  15 {
  16         char *line = NULL;
  17         size_t n;
  18         int err = -1;
  19         FILE *file = fopen(filename, "r");
  20
  21         if (file == NULL)
  22                 goto out_failure;
  23
  24         err = 0;
  25
  26         while (!feof(file)) {
  27                 u64 start;
  28                 int line_len, len;
  29                 char symbol_type;
  30                 char *symbol_name;
  31
  32                 line_len = getline(&line, &n, file);
  33                 if (line_len < 0 || !line)
  34                         break;
  35
  36                 line[--line_len] = '\0'; /* \n */
  37
  38                 len = hex2u64(line, &start);
  39
  40                 len++;
  41                 if (len + 2 >= line_len)
  42                         continue;
  43
  44                 symbol_type = line[len];
  45                 len += 2;
  46                 symbol_name = line + len;
  47                 len = line_len - len;
  48
  49                 if (len >= KSYM_NAME_LEN) {
  50                         err = -1;
  51                         break;
  52                 }
  53
  54                 err = process_symbol(arg, symbol_name, symbol_type, start);
  55                 if (err)
  56                         break;
  57         }
  58
  59         free(line);
  60         fclose(file);
  61         return err;
  62
  63 out_failure:
  64         return -1;
  65 }