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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
*/
#ifndef _WARN_H
#define _WARN_H
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <objtool/builtin.h>
#include <objtool/elf.h>
extern const char *objname;
static inline char *offstr(struct section *sec, unsigned long offset)
{
bool is_text = (sec->sh.sh_flags & SHF_EXECINSTR);
struct symbol *sym = NULL;
char *str;
int len;
if (is_text)
sym = find_func_containing(sec, offset);
if (!sym)
sym = find_symbol_containing(sec, offset);
if (sym) {
str = malloc(strlen(sym->name) + strlen(sec->name) + 40);
len = sprintf(str, "%s+0x%lx", sym->name, offset - sym->offset);
if (opts.sec_address)
sprintf(str+len, " (%s+0x%lx)", sec->name, offset);
} else {
str = malloc(strlen(sec->name) + 20);
sprintf(str, "%s+0x%lx", sec->name, offset);
}
return str;
}
#define ___WARN(severity, extra, format, ...) \
fprintf(stderr, \
"%s%s%s: objtool" extra ": " format "\n", \
objname ?: "", \
objname ? ": " : "", \
severity, \
##__VA_ARGS__)
#define __WARN(severity, format, ...) \
___WARN(severity, "", format, ##__VA_ARGS__)
#define __WARN_LINE(severity, format, ...) \
___WARN(severity, " [%s:%d]", format, __FILE__, __LINE__, ##__VA_ARGS__)
#define __WARN_ELF(severity, format, ...) \
__WARN_LINE(severity, "%s: " format " failed: %s", __func__, ##__VA_ARGS__, elf_errmsg(-1))
#define __WARN_GLIBC(severity, format, ...) \
__WARN_LINE(severity, "%s: " format " failed: %s", __func__, ##__VA_ARGS__, strerror(errno))
#define __WARN_FUNC(severity, sec, offset, format, ...) \
({ \
char *_str = offstr(sec, offset); \
__WARN(severity, "%s: " format, _str, ##__VA_ARGS__); \
free(_str); \
})
#define WARN_STR (opts.werror ? "error" : "warning")
#define WARN(format, ...) __WARN(WARN_STR, format, ##__VA_ARGS__)
#define WARN_FUNC(sec, offset, format, ...) __WARN_FUNC(WARN_STR, sec, offset, format, ##__VA_ARGS__)
#define WARN_INSN(insn, format, ...) \
({ \
struct instruction *_insn = (insn); \
if (!insn_sym(_insn) || !insn_sym(_insn)->warned) { \
WARN_FUNC(_insn->sec, _insn->offset, format, \
##__VA_ARGS__); \
BT_INSN(_insn, ""); \
} \
if (insn_sym(_insn)) \
insn_sym(_insn)->warned = 1; \
})
#define BT_INSN(insn, format, ...) \
({ \
if (opts.verbose || opts.backtrace) { \
struct instruction *__insn = (insn); \
char *_str = offstr(__insn->sec, __insn->offset); \
const char *_istr = objtool_disas_insn(__insn); \
int _len; \
_len = snprintf(NULL, 0, " %s: " format, _str, ##__VA_ARGS__); \
_len = (_len < 50) ? 50 - _len : 0; \
WARN(" %s: " format " %*s%s", _str, ##__VA_ARGS__, _len, "", _istr); \
free(_str); \
__insn->trace = 1; \
} \
})
#define ERROR_STR "error"
#define ERROR(format, ...) __WARN(ERROR_STR, format, ##__VA_ARGS__)
#define ERROR_ELF(format, ...) __WARN_ELF(ERROR_STR, format, ##__VA_ARGS__)
#define ERROR_GLIBC(format, ...) __WARN_GLIBC(ERROR_STR, format, ##__VA_ARGS__)
#define ERROR_FUNC(sec, offset, format, ...) __WARN_FUNC(ERROR_STR, sec, offset, format, ##__VA_ARGS__)
#define ERROR_INSN(insn, format, ...) ERROR_FUNC(insn->sec, insn->offset, format, ##__VA_ARGS__)
extern bool debug, debug_correlate, debug_clone;
extern int indent;
static inline void unindent(int *unused) { indent--; }
/*
* Clang prior to 17 is being silly and considers many __cleanup() variables
* as unused (because they are, their sole purpose is to go out of scope).
*
* https://github.com/llvm/llvm-project/commit/877210faa447f4cc7db87812f8ed80e398fedd61
*/
#undef __cleanup
#define __cleanup(func) __maybe_unused __attribute__((__cleanup__(func)))
#define __dbg(format, ...) \
fprintf(stderr, \
"DEBUG: %s%s" format "\n", \
objname ?: "", \
objname ? ": " : "", \
##__VA_ARGS__)
#define dbg_checksum_insn(func, insn, checksum) \
({ \
if (unlikely(func->debug_checksum)) { \
char *insn_off = offstr(insn->sec, insn->offset); \
__dbg("checksum: %s(): %s %016llx", \
func->name, insn_off, (unsigned long long)checksum);\
free(insn_off); \
} \
})
#define dbg_checksum_object(sym, offset, what, checksum) \
({ \
if (unlikely(sym->debug_checksum)) \
__dbg("checksum: %s+0x%lx: %s %016llx", \
sym->name, offset, what, \
(unsigned long long)checksum); \
})
#define dbg_correlate(args...) \
({ \
if (unlikely(debug_correlate)) \
__dbg(args); \
})
#define __dbg_clone(format, ...) \
({ \
if (unlikely(debug_clone)) \
__dbg("%*s" format, indent * 8, "", ##__VA_ARGS__); \
})
#define dbg_clone(args...) \
int __cleanup(unindent) __dummy_##__COUNTER__; \
__dbg_clone(args); \
indent++
#endif /* _WARN_H */
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