246b2c8548
It's easier to use and also gives easy access to the instruction's containing function, which is useful for printing that function's symbol. It will also be useful in the future for rate-limiting and disassembly of warned functions. Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/2eaa3155c90fba683d8723599f279c46025b75f3.1681325924.git.jpoimboe@kernel.org
73 lines
1.7 KiB
C
73 lines
1.7 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: warning: objtool: " format "\n", \
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objname, ##__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_INSN(insn, format, ...) \
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({ \
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WARN_FUNC(format, insn->sec, insn->offset, ##__VA_ARGS__); \
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})
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#define BT_FUNC(format, insn, ...) \
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({ \
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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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#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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