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a307dd28b1
This is similar to GCC's behavior and makes it more obvious why the build failed. Suggested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Brendan Jackman <jackmanb@google.com> Link: https://lore.kernel.org/r/56f0565b15b4b4caa9a08953fa9c679dfa973514.1741975349.git.jpoimboe@kernel.org
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
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*/
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#ifndef _WARN_H
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#define _WARN_H
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <objtool/builtin.h>
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#include <objtool/elf.h>
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extern const char *objname;
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static inline char *offstr(struct section *sec, unsigned long offset)
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{
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bool is_text = (sec->sh.sh_flags & SHF_EXECINSTR);
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struct symbol *sym = NULL;
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char *str;
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int len;
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if (is_text)
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sym = find_func_containing(sec, offset);
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if (!sym)
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sym = find_symbol_containing(sec, offset);
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if (sym) {
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str = malloc(strlen(sym->name) + strlen(sec->name) + 40);
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len = sprintf(str, "%s+0x%lx", sym->name, offset - sym->offset);
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if (opts.sec_address)
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sprintf(str+len, " (%s+0x%lx)", sec->name, offset);
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} else {
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str = malloc(strlen(sec->name) + 20);
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sprintf(str, "%s+0x%lx", sec->name, offset);
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}
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return str;
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}
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#define WARN(format, ...) \
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fprintf(stderr, \
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"%s: %s: objtool: " format "\n", \
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objname, \
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opts.werror ? "error" : "warning", \
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##__VA_ARGS__)
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#define WARN_FUNC(format, sec, offset, ...) \
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({ \
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char *_str = offstr(sec, offset); \
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WARN("%s: " format, _str, ##__VA_ARGS__); \
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free(_str); \
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})
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#define WARN_LIMIT 2
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#define WARN_INSN(insn, format, ...) \
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({ \
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struct instruction *_insn = (insn); \
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BUILD_BUG_ON(WARN_LIMIT > 2); \
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if (!_insn->sym || _insn->sym->warnings < WARN_LIMIT) { \
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WARN_FUNC(format, _insn->sec, _insn->offset, \
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##__VA_ARGS__); \
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if (_insn->sym) \
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_insn->sym->warnings++; \
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} else if (_insn->sym && _insn->sym->warnings == WARN_LIMIT) { \
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WARN_FUNC("skipping duplicate warning(s)", \
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_insn->sec, _insn->offset); \
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_insn->sym->warnings++; \
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} \
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})
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#define BT_INSN(insn, format, ...) \
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({ \
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if (opts.verbose || opts.backtrace) { \
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struct instruction *_insn = (insn); \
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char *_str = offstr(_insn->sec, _insn->offset); \
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WARN(" %s: " format, _str, ##__VA_ARGS__); \
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free(_str); \
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} \
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})
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#define WARN_ELF(format, ...) \
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WARN(format ": %s", ##__VA_ARGS__, elf_errmsg(-1))
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#endif /* _WARN_H */
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