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// SPDX-License-Identifier: GPL-2.0-only
/*
* intel_pt_log.c: Intel Processor Trace support
* Copyright (c) 2013-2014, Intel Corporation.
*/
#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include "intel-pt-log.h"
#include "intel-pt-insn-decoder.h"
#include "intel-pt-pkt-decoder.h"
#define MAX_LOG_NAME 256
static FILE *f;
static char log_name[MAX_LOG_NAME];
bool intel_pt_enable_logging;
void *intel_pt_log_fp(void)
{
return f;
}
void intel_pt_log_enable(void)
{
intel_pt_enable_logging = true;
}
void intel_pt_log_disable(void)
{
if (f)
fflush(f);
intel_pt_enable_logging = false;
}
void intel_pt_log_set_name(const char *name)
{
strncpy(log_name, name, MAX_LOG_NAME - 5);
strcat(log_name, ".log");
}
static void intel_pt_print_data(const unsigned char *buf, int len, uint64_t pos,
int indent)
{
int i;
for (i = 0; i < indent; i++)
fprintf(f, " ");
fprintf(f, " %08" PRIx64 ": ", pos);
for (i = 0; i < len; i++)
fprintf(f, " %02x", buf[i]);
for (; i < 16; i++)
fprintf(f, " ");
fprintf(f, " ");
}
static void intel_pt_print_no_data(uint64_t pos, int indent)
{
int i;
for (i = 0; i < indent; i++)
fprintf(f, " ");
fprintf(f, " %08" PRIx64 ": ", pos);
for (i = 0; i < 16; i++)
fprintf(f, " ");
fprintf(f, " ");
}
static int intel_pt_log_open(void)
{
if (!intel_pt_enable_logging)
return -1;
if (f)
return 0;
if (!log_name[0])
return -1;
f = fopen(log_name, "w+");
if (!f) {
intel_pt_enable_logging = false;
return -1;
}
return 0;
}
void __intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
uint64_t pos, const unsigned char *buf)
{
char desc[INTEL_PT_PKT_DESC_MAX];
if (intel_pt_log_open())
return;
intel_pt_print_data(buf, pkt_len, pos, 0);
intel_pt_pkt_desc(packet, desc, INTEL_PT_PKT_DESC_MAX);
fprintf(f, "%s\n", desc);
}
void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
{
char desc[INTEL_PT_INSN_DESC_MAX];
size_t len = intel_pt_insn->length;
if (intel_pt_log_open())
return;
if (len > INTEL_PT_INSN_BUF_SZ)
len = INTEL_PT_INSN_BUF_SZ;
intel_pt_print_data(intel_pt_insn->buf, len, ip, 8);
if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
fprintf(f, "%s\n", desc);
else
fprintf(f, "Bad instruction!\n");
}
void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
uint64_t ip)
{
char desc[INTEL_PT_INSN_DESC_MAX];
if (intel_pt_log_open())
return;
intel_pt_print_no_data(ip, 8);
if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
fprintf(f, "%s\n", desc);
else
fprintf(f, "Bad instruction!\n");
}
void __intel_pt_log(const char *fmt, ...)
{
va_list args;
if (intel_pt_log_open())
return;
va_start(args, fmt);
vfprintf(f, fmt, args);
va_end(args);
}
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