d7015e50a9
ptwrite is an Intel x86 instruction that writes arbitrary values into an Intel PT trace. It is not supported on all hardware, so provide an alternative that makes use of TNT packets to convey the payload data. TNT packets encode Taken/Not-taken conditional branch information, so taking branches based on the payload value will encode the value into the TNT packet. Refer to the changes to the documentation file perf-intel-pt.txt in this patch for an example. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20220509152400.376613-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* intel_pt_insn_decoder.h: Intel Processor Trace support
|
|
* Copyright (c) 2013-2014, Intel Corporation.
|
|
*/
|
|
|
|
#ifndef INCLUDE__INTEL_PT_INSN_DECODER_H__
|
|
#define INCLUDE__INTEL_PT_INSN_DECODER_H__
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#define INTEL_PT_INSN_DESC_MAX 32
|
|
#define INTEL_PT_INSN_BUF_SZ 16
|
|
|
|
enum intel_pt_insn_op {
|
|
INTEL_PT_OP_OTHER,
|
|
INTEL_PT_OP_CALL,
|
|
INTEL_PT_OP_RET,
|
|
INTEL_PT_OP_JCC,
|
|
INTEL_PT_OP_JMP,
|
|
INTEL_PT_OP_LOOP,
|
|
INTEL_PT_OP_IRET,
|
|
INTEL_PT_OP_INT,
|
|
INTEL_PT_OP_SYSCALL,
|
|
INTEL_PT_OP_SYSRET,
|
|
INTEL_PT_OP_VMENTRY,
|
|
};
|
|
|
|
enum intel_pt_insn_branch {
|
|
INTEL_PT_BR_NO_BRANCH,
|
|
INTEL_PT_BR_INDIRECT,
|
|
INTEL_PT_BR_CONDITIONAL,
|
|
INTEL_PT_BR_UNCONDITIONAL,
|
|
};
|
|
|
|
struct intel_pt_insn {
|
|
enum intel_pt_insn_op op;
|
|
enum intel_pt_insn_branch branch;
|
|
bool emulated_ptwrite;
|
|
int length;
|
|
int32_t rel;
|
|
unsigned char buf[INTEL_PT_INSN_BUF_SZ];
|
|
};
|
|
|
|
int intel_pt_get_insn(const unsigned char *buf, size_t len, int x86_64,
|
|
struct intel_pt_insn *intel_pt_insn);
|
|
|
|
const char *intel_pt_insn_name(enum intel_pt_insn_op op);
|
|
|
|
int intel_pt_insn_desc(const struct intel_pt_insn *intel_pt_insn, char *buf,
|
|
size_t buf_len);
|
|
|
|
int intel_pt_insn_type(enum intel_pt_insn_op op);
|
|
|
|
#endif
|