tools/objtool/warn.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
   4  */
   5
   6 #ifndef _WARN_H
   7 #define _WARN_H
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <sys/types.h>
  12 #include <sys/stat.h>
  13 #include <fcntl.h>
  14 #include "elf.h"
  15
  16 extern const char *objname;
  17
  18 static inline char *offstr(struct section *sec, unsigned long offset)
  19 {
  20         struct symbol *func;
  21         char *name, *str;
  22         unsigned long name_off;
  23
  24         func = find_containing_func(sec, offset);
  25         if (func) {
  26                 name = func->name;
  27                 name_off = offset - func->offset;
  28         } else {
  29                 name = sec->name;
  30                 name_off = offset;
  31         }
  32
  33         str = malloc(strlen(name) + 20);
  34
  35         if (func)
  36                 sprintf(str, "%s()+0x%lx", name, name_off);
  37         else
  38                 sprintf(str, "%s+0x%lx", name, name_off);
  39
  40         return str;
  41 }
  42
  43 #define WARN(format, ...)                               \
  44         fprintf(stderr,                                 \
  45                 "%s: warning: objtool: " format "\n",   \
  46                 objname, ##__VA_ARGS__)
  47
  48 #define WARN_FUNC(format, sec, offset, ...)             \
  49 ({                                                      \
  50         char *_str = offstr(sec, offset);               \
  51         WARN("%s: " format, _str, ##__VA_ARGS__);       \
  52         free(_str);                                     \
  53 })
  54
  55 #define BT_FUNC(format, insn, ...)                      \
  56 ({                                                      \
  57         struct instruction *_insn = (insn);             \
  58         char *_str = offstr(_insn->sec, _insn->offset); \
  59         WARN("  %s: " format, _str, ##__VA_ARGS__);     \
  60         free(_str);                                     \
  61 })
  62
  63 #define WARN_ELF(format, ...)                           \
  64         WARN(format ": %s", ##__VA_ARGS__, elf_errmsg(-1))
  65
  66 #endif /* _WARN_H */