tools/objtool/warn.h

   1 /*
   2  * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef _WARN_H
  19 #define _WARN_H
  20
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #include "elf.h"
  27
  28 extern const char *objname;
  29
  30 static inline char *offstr(struct section *sec, unsigned long offset)
  31 {
  32         struct symbol *func;
  33         char *name, *str;
  34         unsigned long name_off;
  35
  36         func = find_containing_func(sec, offset);
  37         if (func) {
  38                 name = func->name;
  39                 name_off = offset - func->offset;
  40         } else {
  41                 name = sec->name;
  42                 name_off = offset;
  43         }
  44
  45         str = malloc(strlen(name) + 20);
  46
  47         if (func)
  48                 sprintf(str, "%s()+0x%lx", name, name_off);
  49         else
  50                 sprintf(str, "%s+0x%lx", name, name_off);
  51
  52         return str;
  53 }
  54
  55 #define WARN(format, ...)                               \
  56         fprintf(stderr,                                 \
  57                 "%s: warning: objtool: " format "\n",   \
  58                 objname, ##__VA_ARGS__)
  59
  60 #define WARN_FUNC(format, sec, offset, ...)             \
  61 ({                                                      \
  62         char *_str = offstr(sec, offset);               \
  63         WARN("%s: " format, _str, ##__VA_ARGS__);       \
  64         free(_str);                                     \
  65 })
  66
  67 #define WARN_ELF(format, ...)                           \
  68         WARN(format ": %s", ##__VA_ARGS__, elf_errmsg(-1))
  69
  70 #endif /* _WARN_H */