LXR linux/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
  21extern const char *objname;
  22
  23static inline char *offstr(struct section *sec, unsigned long offset)
  24{
  25        struct symbol *func;
  26        char *name, *str;
  27        unsigned long name_off;
  28
  29        func = find_containing_func(sec, offset);
  30        if (func) {
  31                name = func->name;
  32                name_off = offset - func->offset;
  33        } else {
  34                name = sec->name;
  35                name_off = offset;
  36        }
  37
  38        str = malloc(strlen(name) + 20);
  39
  40        if (func)
  41                sprintf(str, "%s()+0x%lx", name, name_off);
  42        else
  43                sprintf(str, "%s+0x%lx", name, name_off);
  44
  45        return str;
  46}
  47
  48#define WARN(format, ...)                               \
  49        fprintf(stderr,                                 \
  50                "%s: warning: objtool: " format "\n",   \
  51                objname, ##__VA_ARGS__)
  52
  53#define WARN_FUNC(format, sec, offset, ...)             \
  54({                                                      \
  55        char *_str = offstr(sec, offset);               \
  56        WARN("%s: " format, _str, ##__VA_ARGS__);       \
  57        free(_str);                                     \
  58})
  59
  60#endif /* _WARN_H */
  61