tools/lib/symbol/kallsyms.c

   1 #include "symbol/kallsyms.h"
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 int kallsyms__parse(const char *filename, void *arg,
   6                     int (*process_symbol)(void *arg, const char *name,
   7                                           char type, u64 start))
   8 {
   9         char *line = NULL;
  10         size_t n;
  11         int err = -1;
  12         FILE *file = fopen(filename, "r");
  13
  14         if (file == NULL)
  15                 goto out_failure;
  16
  17         err = 0;
  18
  19         while (!feof(file)) {
  20                 u64 start;
  21                 int line_len, len;
  22                 char symbol_type;
  23                 char *symbol_name;
  24
  25                 line_len = getline(&line, &n, file);
  26                 if (line_len < 0 || !line)
  27                         break;
  28
  29                 line[--line_len] = '\0'; /* \n */
  30
  31                 len = hex2u64(line, &start);
  32
  33                 len++;
  34                 if (len + 2 >= line_len)
  35                         continue;
  36
  37                 symbol_type = line[len];
  38                 len += 2;
  39                 symbol_name = line + len;
  40                 len = line_len - len;
  41
  42                 if (len >= KSYM_NAME_LEN) {
  43                         err = -1;
  44                         break;
  45                 }
  46
  47                 err = process_symbol(arg, symbol_name, symbol_type, start);
  48                 if (err)
  49                         break;
  50         }
  51
  52         free(line);
  53         fclose(file);
  54         return err;
  55
  56 out_failure:
  57         return -1;
  58 }