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 <objtool/builtin.h> 15 #include <objtool/elf.h> 16 17 extern const char *objname; 18 19 static inline char *offstr(struct section *sec, unsigned long offset) 20 { 21 bool is_text = (sec->sh.sh_flags & SHF_EXECINSTR); 22 struct symbol *sym = NULL; 23 char *str; 24 int len; 25 26 if (is_text) 27 sym = find_func_containing(sec, offset); 28 if (!sym) 29 sym = find_symbol_containing(sec, offset); 30 31 if (sym) { 32 str = malloc(strlen(sym->name) + strlen(sec->name) + 40); 33 len = sprintf(str, "%s+0x%lx", sym->name, offset - sym->offset); 34 if (opts.sec_address) 35 sprintf(str+len, " (%s+0x%lx)", sec->name, offset); 36 } else { 37 str = malloc(strlen(sec->name) + 20); 38 sprintf(str, "%s+0x%lx", sec->name, offset); 39 } 40 41 return str; 42 } 43 44 #define WARN(format, ...) \ 45 fprintf(stderr, \ 46 "%s: warning: objtool: " format "\n", \ 47 objname, ##__VA_ARGS__) 48 49 #define WARN_FUNC(format, sec, offset, ...) \ 50 ({ \ 51 char *_str = offstr(sec, offset); \ 52 WARN("%s: " format, _str, ##__VA_ARGS__); \ 53 free(_str); \ 54 }) 55 56 #define WARN_INSN(insn, format, ...) \ 57 ({ \ 58 struct instruction *_insn = (insn); \ 59 if (!_insn->sym || !_insn->sym->warned) \ 60 WARN_FUNC(format, _insn->sec, _insn->offset, \ 61 ##__VA_ARGS__); \ 62 if (_insn->sym) \ 63 _insn->sym->warned = 1; \ 64 }) 65 66 #define BT_INSN(insn, format, ...) \ 67 ({ \ 68 if (opts.verbose || opts.backtrace) { \ 69 struct instruction *_insn = (insn); \ 70 char *_str = offstr(_insn->sec, _insn->offset); \ 71 WARN(" %s: " format, _str, ##__VA_ARGS__); \ 72 free(_str); \ 73 } \ 74 }) 75 76 #define WARN_ELF(format, ...) \ 77 WARN(format ": %s", ##__VA_ARGS__, elf_errmsg(-1)) 78 79 #endif /* _WARN_H */ 80