2015-07-18 00:33:37 +08:00
|
|
|
/*
|
|
|
|
* intel_pt_pkt_decoder.c: Intel Processor Trace support
|
|
|
|
* Copyright (c) 2013-2014, Intel Corporation.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
|
|
* under the terms and conditions of the GNU General Public License,
|
|
|
|
* version 2, as published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
|
|
* more details.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <endian.h>
|
|
|
|
#include <byteswap.h>
|
2017-02-10 02:22:22 +08:00
|
|
|
#include <linux/compiler.h>
|
2015-07-18 00:33:37 +08:00
|
|
|
|
|
|
|
#include "intel-pt-pkt-decoder.h"
|
|
|
|
|
|
|
|
#define BIT(n) (1 << (n))
|
|
|
|
|
|
|
|
#define BIT63 ((uint64_t)1 << 63)
|
|
|
|
|
2015-07-18 00:33:53 +08:00
|
|
|
#define NR_FLAG BIT63
|
|
|
|
|
2015-07-18 00:33:37 +08:00
|
|
|
#if __BYTE_ORDER == __BIG_ENDIAN
|
|
|
|
#define le16_to_cpu bswap_16
|
|
|
|
#define le32_to_cpu bswap_32
|
|
|
|
#define le64_to_cpu bswap_64
|
|
|
|
#define memcpy_le64(d, s, n) do { \
|
|
|
|
memcpy((d), (s), (n)); \
|
|
|
|
*(d) = le64_to_cpu(*(d)); \
|
|
|
|
} while (0)
|
|
|
|
#else
|
|
|
|
#define le16_to_cpu
|
|
|
|
#define le32_to_cpu
|
|
|
|
#define le64_to_cpu
|
|
|
|
#define memcpy_le64 memcpy
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static const char * const packet_name[] = {
|
|
|
|
[INTEL_PT_BAD] = "Bad Packet!",
|
|
|
|
[INTEL_PT_PAD] = "PAD",
|
|
|
|
[INTEL_PT_TNT] = "TNT",
|
|
|
|
[INTEL_PT_TIP_PGD] = "TIP.PGD",
|
|
|
|
[INTEL_PT_TIP_PGE] = "TIP.PGE",
|
|
|
|
[INTEL_PT_TSC] = "TSC",
|
2015-07-18 00:33:53 +08:00
|
|
|
[INTEL_PT_TMA] = "TMA",
|
2015-07-18 00:33:37 +08:00
|
|
|
[INTEL_PT_MODE_EXEC] = "MODE.Exec",
|
|
|
|
[INTEL_PT_MODE_TSX] = "MODE.TSX",
|
2015-07-18 00:33:53 +08:00
|
|
|
[INTEL_PT_MTC] = "MTC",
|
2015-07-18 00:33:37 +08:00
|
|
|
[INTEL_PT_TIP] = "TIP",
|
|
|
|
[INTEL_PT_FUP] = "FUP",
|
2015-07-18 00:33:53 +08:00
|
|
|
[INTEL_PT_CYC] = "CYC",
|
|
|
|
[INTEL_PT_VMCS] = "VMCS",
|
2015-07-18 00:33:37 +08:00
|
|
|
[INTEL_PT_PSB] = "PSB",
|
|
|
|
[INTEL_PT_PSBEND] = "PSBEND",
|
|
|
|
[INTEL_PT_CBR] = "CBR",
|
2015-07-18 00:33:53 +08:00
|
|
|
[INTEL_PT_TRACESTOP] = "TraceSTOP",
|
2015-07-18 00:33:37 +08:00
|
|
|
[INTEL_PT_PIP] = "PIP",
|
|
|
|
[INTEL_PT_OVF] = "OVF",
|
2015-07-18 00:33:53 +08:00
|
|
|
[INTEL_PT_MNT] = "MNT",
|
2017-05-26 16:17:14 +08:00
|
|
|
[INTEL_PT_PTWRITE] = "PTWRITE",
|
|
|
|
[INTEL_PT_PTWRITE_IP] = "PTWRITE",
|
|
|
|
[INTEL_PT_EXSTOP] = "EXSTOP",
|
|
|
|
[INTEL_PT_EXSTOP_IP] = "EXSTOP",
|
|
|
|
[INTEL_PT_MWAIT] = "MWAIT",
|
|
|
|
[INTEL_PT_PWRE] = "PWRE",
|
|
|
|
[INTEL_PT_PWRX] = "PWRX",
|
2015-07-18 00:33:37 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
const char *intel_pt_pkt_name(enum intel_pt_pkt_type type)
|
|
|
|
{
|
|
|
|
return packet_name[type];
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_long_tnt(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
uint64_t payload;
|
|
|
|
int count;
|
|
|
|
|
|
|
|
if (len < 8)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
|
|
|
|
payload = le64_to_cpu(*(uint64_t *)buf);
|
|
|
|
|
|
|
|
for (count = 47; count; count--) {
|
|
|
|
if (payload & BIT63)
|
|
|
|
break;
|
|
|
|
payload <<= 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
packet->type = INTEL_PT_TNT;
|
|
|
|
packet->count = count;
|
|
|
|
packet->payload = payload << 1;
|
|
|
|
return 8;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_pip(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
uint64_t payload = 0;
|
|
|
|
|
|
|
|
if (len < 8)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
|
|
|
|
packet->type = INTEL_PT_PIP;
|
|
|
|
memcpy_le64(&payload, buf + 2, 6);
|
|
|
|
packet->payload = payload >> 1;
|
2015-07-18 00:33:53 +08:00
|
|
|
if (payload & 1)
|
|
|
|
packet->payload |= NR_FLAG;
|
2015-07-18 00:33:37 +08:00
|
|
|
|
|
|
|
return 8;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:53 +08:00
|
|
|
static int intel_pt_get_tracestop(struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
packet->type = INTEL_PT_TRACESTOP;
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:37 +08:00
|
|
|
static int intel_pt_get_cbr(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 4)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
packet->type = INTEL_PT_CBR;
|
2017-05-26 16:17:15 +08:00
|
|
|
packet->payload = le16_to_cpu(*(uint16_t *)(buf + 2));
|
2015-07-18 00:33:37 +08:00
|
|
|
return 4;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:53 +08:00
|
|
|
static int intel_pt_get_vmcs(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
unsigned int count = (52 - 5) >> 3;
|
|
|
|
|
|
|
|
if (count < 1 || count > 7)
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
|
|
|
|
if (len < count + 2)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
|
|
|
|
packet->type = INTEL_PT_VMCS;
|
|
|
|
packet->count = count;
|
|
|
|
memcpy_le64(&packet->payload, buf + 2, count);
|
|
|
|
|
|
|
|
return count + 2;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:37 +08:00
|
|
|
static int intel_pt_get_ovf(struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
packet->type = INTEL_PT_OVF;
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_psb(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (len < 16)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
|
|
|
|
for (i = 2; i < 16; i += 2) {
|
|
|
|
if (buf[i] != 2 || buf[i + 1] != 0x82)
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
}
|
|
|
|
|
|
|
|
packet->type = INTEL_PT_PSB;
|
|
|
|
return 16;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_psbend(struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
packet->type = INTEL_PT_PSBEND;
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:53 +08:00
|
|
|
static int intel_pt_get_tma(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 7)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
|
|
|
|
packet->type = INTEL_PT_TMA;
|
|
|
|
packet->payload = buf[2] | (buf[3] << 8);
|
|
|
|
packet->count = buf[5] | ((buf[6] & BIT(0)) << 8);
|
|
|
|
return 7;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:37 +08:00
|
|
|
static int intel_pt_get_pad(struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
packet->type = INTEL_PT_PAD;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:53 +08:00
|
|
|
static int intel_pt_get_mnt(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 11)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
packet->type = INTEL_PT_MNT;
|
|
|
|
memcpy_le64(&packet->payload, buf + 3, 8);
|
|
|
|
return 11
|
|
|
|
;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_3byte(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 3)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
|
|
|
|
switch (buf[2]) {
|
|
|
|
case 0x88: /* MNT */
|
|
|
|
return intel_pt_get_mnt(buf, len, packet);
|
|
|
|
default:
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-05-26 16:17:14 +08:00
|
|
|
static int intel_pt_get_ptwrite(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
packet->count = (buf[1] >> 5) & 0x3;
|
|
|
|
packet->type = buf[1] & BIT(7) ? INTEL_PT_PTWRITE_IP :
|
|
|
|
INTEL_PT_PTWRITE;
|
|
|
|
|
|
|
|
switch (packet->count) {
|
|
|
|
case 0:
|
|
|
|
if (len < 6)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
packet->payload = le32_to_cpu(*(uint32_t *)(buf + 2));
|
|
|
|
return 6;
|
|
|
|
case 1:
|
|
|
|
if (len < 10)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
packet->payload = le64_to_cpu(*(uint64_t *)(buf + 2));
|
|
|
|
return 10;
|
|
|
|
default:
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_exstop(struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
packet->type = INTEL_PT_EXSTOP;
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_exstop_ip(struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
packet->type = INTEL_PT_EXSTOP_IP;
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_mwait(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 10)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
packet->type = INTEL_PT_MWAIT;
|
|
|
|
packet->payload = le64_to_cpu(*(uint64_t *)(buf + 2));
|
|
|
|
return 10;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_pwre(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 4)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
packet->type = INTEL_PT_PWRE;
|
|
|
|
memcpy_le64(&packet->payload, buf + 2, 2);
|
|
|
|
return 4;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_pwrx(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 7)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
packet->type = INTEL_PT_PWRX;
|
|
|
|
memcpy_le64(&packet->payload, buf + 2, 5);
|
|
|
|
return 7;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:37 +08:00
|
|
|
static int intel_pt_get_ext(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 2)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
|
2017-05-26 16:17:14 +08:00
|
|
|
if ((buf[1] & 0x1f) == 0x12)
|
|
|
|
return intel_pt_get_ptwrite(buf, len, packet);
|
|
|
|
|
2015-07-18 00:33:37 +08:00
|
|
|
switch (buf[1]) {
|
|
|
|
case 0xa3: /* Long TNT */
|
|
|
|
return intel_pt_get_long_tnt(buf, len, packet);
|
|
|
|
case 0x43: /* PIP */
|
|
|
|
return intel_pt_get_pip(buf, len, packet);
|
2015-07-18 00:33:53 +08:00
|
|
|
case 0x83: /* TraceStop */
|
|
|
|
return intel_pt_get_tracestop(packet);
|
2015-07-18 00:33:37 +08:00
|
|
|
case 0x03: /* CBR */
|
|
|
|
return intel_pt_get_cbr(buf, len, packet);
|
2015-07-18 00:33:53 +08:00
|
|
|
case 0xc8: /* VMCS */
|
|
|
|
return intel_pt_get_vmcs(buf, len, packet);
|
2015-07-18 00:33:37 +08:00
|
|
|
case 0xf3: /* OVF */
|
|
|
|
return intel_pt_get_ovf(packet);
|
|
|
|
case 0x82: /* PSB */
|
|
|
|
return intel_pt_get_psb(buf, len, packet);
|
|
|
|
case 0x23: /* PSBEND */
|
|
|
|
return intel_pt_get_psbend(packet);
|
2015-07-18 00:33:53 +08:00
|
|
|
case 0x73: /* TMA */
|
|
|
|
return intel_pt_get_tma(buf, len, packet);
|
|
|
|
case 0xC3: /* 3-byte header */
|
|
|
|
return intel_pt_get_3byte(buf, len, packet);
|
2017-05-26 16:17:14 +08:00
|
|
|
case 0x62: /* EXSTOP no IP */
|
|
|
|
return intel_pt_get_exstop(packet);
|
|
|
|
case 0xE2: /* EXSTOP with IP */
|
|
|
|
return intel_pt_get_exstop_ip(packet);
|
|
|
|
case 0xC2: /* MWAIT */
|
|
|
|
return intel_pt_get_mwait(buf, len, packet);
|
|
|
|
case 0x22: /* PWRE */
|
|
|
|
return intel_pt_get_pwre(buf, len, packet);
|
|
|
|
case 0xA2: /* PWRX */
|
|
|
|
return intel_pt_get_pwrx(buf, len, packet);
|
2015-07-18 00:33:37 +08:00
|
|
|
default:
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_short_tnt(unsigned int byte,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
int count;
|
|
|
|
|
|
|
|
for (count = 6; count; count--) {
|
|
|
|
if (byte & BIT(7))
|
|
|
|
break;
|
|
|
|
byte <<= 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
packet->type = INTEL_PT_TNT;
|
|
|
|
packet->count = count;
|
|
|
|
packet->payload = (uint64_t)byte << 57;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:53 +08:00
|
|
|
static int intel_pt_get_cyc(unsigned int byte, const unsigned char *buf,
|
|
|
|
size_t len, struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
unsigned int offs = 1, shift;
|
|
|
|
uint64_t payload = byte >> 3;
|
|
|
|
|
|
|
|
byte >>= 2;
|
|
|
|
len -= 1;
|
|
|
|
for (shift = 5; byte & 1; shift += 7) {
|
|
|
|
if (offs > 9)
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
if (len < offs)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
byte = buf[offs++];
|
|
|
|
payload |= (byte >> 1) << shift;
|
|
|
|
}
|
|
|
|
|
|
|
|
packet->type = INTEL_PT_CYC;
|
|
|
|
packet->payload = payload;
|
|
|
|
return offs;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:37 +08:00
|
|
|
static int intel_pt_get_ip(enum intel_pt_pkt_type type, unsigned int byte,
|
|
|
|
const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
2016-07-20 17:00:06 +08:00
|
|
|
int ip_len;
|
|
|
|
|
|
|
|
packet->count = byte >> 5;
|
|
|
|
|
|
|
|
switch (packet->count) {
|
2015-07-18 00:33:37 +08:00
|
|
|
case 0:
|
2016-07-20 17:00:06 +08:00
|
|
|
ip_len = 0;
|
2015-07-18 00:33:37 +08:00
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
if (len < 3)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
2016-07-20 17:00:06 +08:00
|
|
|
ip_len = 2;
|
2015-07-18 00:33:37 +08:00
|
|
|
packet->payload = le16_to_cpu(*(uint16_t *)(buf + 1));
|
|
|
|
break;
|
|
|
|
case 2:
|
|
|
|
if (len < 5)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
2016-07-20 17:00:06 +08:00
|
|
|
ip_len = 4;
|
2015-07-18 00:33:37 +08:00
|
|
|
packet->payload = le32_to_cpu(*(uint32_t *)(buf + 1));
|
|
|
|
break;
|
|
|
|
case 3:
|
2016-07-20 17:00:06 +08:00
|
|
|
case 4:
|
2015-07-18 00:33:37 +08:00
|
|
|
if (len < 7)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
2016-07-20 17:00:06 +08:00
|
|
|
ip_len = 6;
|
2015-07-18 00:33:37 +08:00
|
|
|
memcpy_le64(&packet->payload, buf + 1, 6);
|
|
|
|
break;
|
2016-07-20 17:00:06 +08:00
|
|
|
case 6:
|
|
|
|
if (len < 9)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
ip_len = 8;
|
|
|
|
packet->payload = le64_to_cpu(*(uint64_t *)(buf + 1));
|
|
|
|
break;
|
2015-07-18 00:33:37 +08:00
|
|
|
default:
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
}
|
|
|
|
|
|
|
|
packet->type = type;
|
|
|
|
|
2016-07-20 17:00:06 +08:00
|
|
|
return ip_len + 1;
|
2015-07-18 00:33:37 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_mode(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 2)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
|
|
|
|
switch (buf[1] >> 5) {
|
|
|
|
case 0:
|
|
|
|
packet->type = INTEL_PT_MODE_EXEC;
|
|
|
|
switch (buf[1] & 3) {
|
|
|
|
case 0:
|
|
|
|
packet->payload = 16;
|
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
packet->payload = 64;
|
|
|
|
break;
|
|
|
|
case 2:
|
|
|
|
packet->payload = 32;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
packet->type = INTEL_PT_MODE_TSX;
|
|
|
|
if ((buf[1] & 3) == 3)
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
packet->payload = buf[1] & 3;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pt_get_tsc(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 8)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
packet->type = INTEL_PT_TSC;
|
|
|
|
memcpy_le64(&packet->payload, buf + 1, 7);
|
|
|
|
return 8;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:53 +08:00
|
|
|
static int intel_pt_get_mtc(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
if (len < 2)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
packet->type = INTEL_PT_MTC;
|
|
|
|
packet->payload = buf[1];
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:37 +08:00
|
|
|
static int intel_pt_do_get_packet(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
unsigned int byte;
|
|
|
|
|
|
|
|
memset(packet, 0, sizeof(struct intel_pt_pkt));
|
|
|
|
|
|
|
|
if (!len)
|
|
|
|
return INTEL_PT_NEED_MORE_BYTES;
|
|
|
|
|
|
|
|
byte = buf[0];
|
|
|
|
if (!(byte & BIT(0))) {
|
|
|
|
if (byte == 0)
|
|
|
|
return intel_pt_get_pad(packet);
|
|
|
|
if (byte == 2)
|
|
|
|
return intel_pt_get_ext(buf, len, packet);
|
|
|
|
return intel_pt_get_short_tnt(byte, packet);
|
|
|
|
}
|
|
|
|
|
2015-07-18 00:33:53 +08:00
|
|
|
if ((byte & 2))
|
|
|
|
return intel_pt_get_cyc(byte, buf, len, packet);
|
|
|
|
|
2015-07-18 00:33:37 +08:00
|
|
|
switch (byte & 0x1f) {
|
|
|
|
case 0x0D:
|
|
|
|
return intel_pt_get_ip(INTEL_PT_TIP, byte, buf, len, packet);
|
|
|
|
case 0x11:
|
|
|
|
return intel_pt_get_ip(INTEL_PT_TIP_PGE, byte, buf, len,
|
|
|
|
packet);
|
|
|
|
case 0x01:
|
|
|
|
return intel_pt_get_ip(INTEL_PT_TIP_PGD, byte, buf, len,
|
|
|
|
packet);
|
|
|
|
case 0x1D:
|
|
|
|
return intel_pt_get_ip(INTEL_PT_FUP, byte, buf, len, packet);
|
|
|
|
case 0x19:
|
|
|
|
switch (byte) {
|
|
|
|
case 0x99:
|
|
|
|
return intel_pt_get_mode(buf, len, packet);
|
|
|
|
case 0x19:
|
|
|
|
return intel_pt_get_tsc(buf, len, packet);
|
2015-07-18 00:33:53 +08:00
|
|
|
case 0x59:
|
|
|
|
return intel_pt_get_mtc(buf, len, packet);
|
2015-07-18 00:33:37 +08:00
|
|
|
default:
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
return INTEL_PT_BAD_PACKET;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int intel_pt_get_packet(const unsigned char *buf, size_t len,
|
|
|
|
struct intel_pt_pkt *packet)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = intel_pt_do_get_packet(buf, len, packet);
|
|
|
|
if (ret > 0) {
|
|
|
|
while (ret < 8 && len > (size_t)ret && !buf[ret])
|
|
|
|
ret += 1;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
|
|
|
|
size_t buf_len)
|
|
|
|
{
|
2015-07-18 00:33:53 +08:00
|
|
|
int ret, i, nr;
|
2015-07-18 00:33:37 +08:00
|
|
|
unsigned long long payload = packet->payload;
|
|
|
|
const char *name = intel_pt_pkt_name(packet->type);
|
|
|
|
|
|
|
|
switch (packet->type) {
|
|
|
|
case INTEL_PT_BAD:
|
|
|
|
case INTEL_PT_PAD:
|
|
|
|
case INTEL_PT_PSB:
|
|
|
|
case INTEL_PT_PSBEND:
|
2015-07-18 00:33:53 +08:00
|
|
|
case INTEL_PT_TRACESTOP:
|
2015-07-18 00:33:37 +08:00
|
|
|
case INTEL_PT_OVF:
|
|
|
|
return snprintf(buf, buf_len, "%s", name);
|
|
|
|
case INTEL_PT_TNT: {
|
|
|
|
size_t blen = buf_len;
|
|
|
|
|
|
|
|
ret = snprintf(buf, blen, "%s ", name);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
buf += ret;
|
|
|
|
blen -= ret;
|
|
|
|
for (i = 0; i < packet->count; i++) {
|
|
|
|
if (payload & BIT63)
|
|
|
|
ret = snprintf(buf, blen, "T");
|
|
|
|
else
|
|
|
|
ret = snprintf(buf, blen, "N");
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
buf += ret;
|
|
|
|
blen -= ret;
|
|
|
|
payload <<= 1;
|
|
|
|
}
|
|
|
|
ret = snprintf(buf, blen, " (%d)", packet->count);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
blen -= ret;
|
|
|
|
return buf_len - blen;
|
|
|
|
}
|
|
|
|
case INTEL_PT_TIP_PGD:
|
|
|
|
case INTEL_PT_TIP_PGE:
|
|
|
|
case INTEL_PT_TIP:
|
|
|
|
case INTEL_PT_FUP:
|
|
|
|
if (!(packet->count))
|
|
|
|
return snprintf(buf, buf_len, "%s no ip", name);
|
2017-02-10 02:22:22 +08:00
|
|
|
__fallthrough;
|
2015-07-18 00:33:53 +08:00
|
|
|
case INTEL_PT_CYC:
|
|
|
|
case INTEL_PT_VMCS:
|
|
|
|
case INTEL_PT_MTC:
|
|
|
|
case INTEL_PT_MNT:
|
2015-07-18 00:33:37 +08:00
|
|
|
case INTEL_PT_CBR:
|
|
|
|
case INTEL_PT_TSC:
|
2015-07-18 00:33:53 +08:00
|
|
|
return snprintf(buf, buf_len, "%s 0x%llx", name, payload);
|
|
|
|
case INTEL_PT_TMA:
|
|
|
|
return snprintf(buf, buf_len, "%s CTC 0x%x FC 0x%x", name,
|
|
|
|
(unsigned)payload, packet->count);
|
2015-07-18 00:33:37 +08:00
|
|
|
case INTEL_PT_MODE_EXEC:
|
|
|
|
return snprintf(buf, buf_len, "%s %lld", name, payload);
|
|
|
|
case INTEL_PT_MODE_TSX:
|
|
|
|
return snprintf(buf, buf_len, "%s TXAbort:%u InTX:%u",
|
|
|
|
name, (unsigned)(payload >> 1) & 1,
|
|
|
|
(unsigned)payload & 1);
|
|
|
|
case INTEL_PT_PIP:
|
2015-07-18 00:33:53 +08:00
|
|
|
nr = packet->payload & NR_FLAG ? 1 : 0;
|
|
|
|
payload &= ~NR_FLAG;
|
|
|
|
ret = snprintf(buf, buf_len, "%s 0x%llx (NR=%d)",
|
|
|
|
name, payload, nr);
|
2015-07-18 00:33:37 +08:00
|
|
|
return ret;
|
2017-05-26 16:17:14 +08:00
|
|
|
case INTEL_PT_PTWRITE:
|
|
|
|
return snprintf(buf, buf_len, "%s 0x%llx IP:0", name, payload);
|
|
|
|
case INTEL_PT_PTWRITE_IP:
|
|
|
|
return snprintf(buf, buf_len, "%s 0x%llx IP:1", name, payload);
|
|
|
|
case INTEL_PT_EXSTOP:
|
|
|
|
return snprintf(buf, buf_len, "%s IP:0", name);
|
|
|
|
case INTEL_PT_EXSTOP_IP:
|
|
|
|
return snprintf(buf, buf_len, "%s IP:1", name);
|
|
|
|
case INTEL_PT_MWAIT:
|
|
|
|
return snprintf(buf, buf_len, "%s 0x%llx Hints 0x%x Extensions 0x%x",
|
|
|
|
name, payload, (unsigned int)(payload & 0xff),
|
|
|
|
(unsigned int)((payload >> 32) & 0x3));
|
|
|
|
case INTEL_PT_PWRE:
|
|
|
|
return snprintf(buf, buf_len, "%s 0x%llx HW:%u CState:%u Sub-CState:%u",
|
|
|
|
name, payload, !!(payload & 0x80),
|
|
|
|
(unsigned int)((payload >> 12) & 0xf),
|
|
|
|
(unsigned int)((payload >> 8) & 0xf));
|
|
|
|
case INTEL_PT_PWRX:
|
|
|
|
return snprintf(buf, buf_len, "%s 0x%llx Last CState:%u Deepest CState:%u Wake Reason 0x%x",
|
|
|
|
name, payload,
|
|
|
|
(unsigned int)((payload >> 4) & 0xf),
|
|
|
|
(unsigned int)(payload & 0xf),
|
|
|
|
(unsigned int)((payload >> 8) & 0xf));
|
2015-07-18 00:33:37 +08:00
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return snprintf(buf, buf_len, "%s 0x%llx (%d)",
|
|
|
|
name, payload, packet->count);
|
|
|
|
}
|