LXR linux/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
  16extern const char *objname;
  17
  18static 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 */
  67