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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2025, Oracle and/or its affiliates.
*/
#ifndef _TRACE_H
#define _TRACE_H
#include <objtool/check.h>
#include <objtool/disas.h>
#ifdef DISAS
extern bool trace;
extern int trace_depth;
#define TRACE(fmt, ...) \
({ if (trace) \
fprintf(stderr, fmt, ##__VA_ARGS__); \
})
/*
* Print the instruction address and a message. The instruction
* itself is not printed.
*/
#define TRACE_ADDR(insn, fmt, ...) \
({ \
if (trace) { \
disas_print_info(stderr, insn, trace_depth - 1, \
fmt "\n", ##__VA_ARGS__); \
} \
})
/*
* Print the instruction address, the instruction and a message.
*/
#define TRACE_INSN(insn, fmt, ...) \
({ \
if (trace) { \
disas_print_insn(stderr, objtool_disas_ctx, \
insn, trace_depth - 1, \
fmt, ##__VA_ARGS__); \
fprintf(stderr, "\n"); \
insn->trace = 1; \
} \
})
#define TRACE_INSN_STATE(insn, sprev, snext) \
({ \
if (trace) \
trace_insn_state(insn, sprev, snext); \
})
#define TRACE_ALT_FMT(pfx, fmt) pfx "<%s.%lx> " fmt
#define TRACE_ALT_ARG(insn) disas_alt_type_name(insn), (insn)->offset
#define TRACE_ALT(insn, fmt, ...) \
TRACE_INSN(insn, TRACE_ALT_FMT("", fmt), \
TRACE_ALT_ARG(insn), ##__VA_ARGS__)
#define TRACE_ALT_INFO(insn, pfx, fmt, ...) \
TRACE_ADDR(insn, TRACE_ALT_FMT(pfx, fmt), \
TRACE_ALT_ARG(insn), ##__VA_ARGS__)
#define TRACE_ALT_INFO_NOADDR(insn, pfx, fmt, ...) \
TRACE_ADDR(NULL, TRACE_ALT_FMT(pfx, fmt), \
TRACE_ALT_ARG(insn), ##__VA_ARGS__)
#define TRACE_ALT_BEGIN(insn, alt, alt_name) \
({ \
if (trace) { \
alt_name = disas_alt_name(alt); \
trace_alt_begin(insn, alt, alt_name); \
} \
})
#define TRACE_ALT_END(insn, alt, alt_name) \
({ \
if (trace) { \
trace_alt_end(insn, alt, alt_name); \
free(alt_name); \
} \
})
static inline void trace_enable(void)
{
trace = true;
trace_depth = 0;
}
static inline void trace_disable(void)
{
trace = false;
}
static inline void trace_depth_inc(void)
{
if (trace)
trace_depth++;
}
static inline void trace_depth_dec(void)
{
if (trace)
trace_depth--;
}
void trace_insn_state(struct instruction *insn, struct insn_state *sprev,
struct insn_state *snext);
void trace_alt_begin(struct instruction *orig_insn, struct alternative *alt,
char *alt_name);
void trace_alt_end(struct instruction *orig_insn, struct alternative *alt,
char *alt_name);
#else /* DISAS */
#define TRACE(fmt, ...) ({})
#define TRACE_ADDR(insn, fmt, ...) ({})
#define TRACE_INSN(insn, fmt, ...) ({})
#define TRACE_INSN_STATE(insn, sprev, snext) ({})
#define TRACE_ALT(insn, fmt, ...) ({})
#define TRACE_ALT_INFO(insn, fmt, ...) ({})
#define TRACE_ALT_INFO_NOADDR(insn, fmt, ...) ({})
#define TRACE_ALT_BEGIN(insn, alt, alt_name) ({})
#define TRACE_ALT_END(insn, alt, alt_name) ({})
static inline void trace_enable(void) {}
static inline void trace_disable(void) {}
static inline void trace_depth_inc(void) {}
static inline void trace_depth_dec(void) {}
static inline void trace_alt_begin(struct instruction *orig_insn,
struct alternative *alt,
char *alt_name) {};
static inline void trace_alt_end(struct instruction *orig_insn,
struct alternative *alt,
char *alt_name) {};
#endif
#endif /* _TRACE_H */
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