Re: [PATCH V6 05/17] perf tools: Add Intel PT instruction decoder
From: Arnaldo Carvalho de Melo
Date: Fri Jun 19 2015 - 11:44:35 EST
Em Thu, Jun 18, 2015 at 07:29:41PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Fri, May 29, 2015 at 04:33:33PM +0300, Adrian Hunter escreveu:
> > Add support for decoding instructions for Intel Processor Trace. The
> > kernel x86 instruction decoder is used for this.
>
> Ok, but we don't access kernel header files directly, and:
>
> [acme@zoo linux]$ find . -name "insn.h"
> ./arch/x86/include/asm/insn.h
> ./arch/arm64/include/asm/insn.h
> ./arch/arm/include/asm/insn.h
> [acme@zoo linux]$ find /usr/include -name "insn.h"
> [acme@zoo linux]$
>
> But I need to look more into this patch to figure out if this is
> something generated at build time, etc, but before that I found a
> problem:
>
> So:
>
> > +inat_tables_script = ../../arch/x86/tools/gen-insn-attr-x86.awk
> > +inat_tables_maps = ../../arch/x86/lib/x86-opcode-map.txt
>
> These need to go into tools/perf/MANIFEST, so that:
So, after adding:
diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
index fe50a1b34aa0..4e5662d8c274 100644
--- a/tools/perf/MANIFEST
+++ b/tools/perf/MANIFEST
@@ -58,6 +58,13 @@ include/linux/stringify.h
lib/hweight.c
lib/rbtree.c
include/linux/swab.h
+arch/x86/lib/insn.c
+arch/x86/lib/inat.c
+arch/x86/include/asm/insn.h
+arch/x86/include/asm/inat.h
+arch/x86/include/asm/inat_types.h
+arch/x86/tools/gen-insn-attr-x86.awk
+arch/x86/lib/x86-opcode-map.txt
arch/*/include/asm/unistd*.h
arch/*/include/uapi/asm/unistd*.h
arch/*/include/uapi/asm/perf_regs.h
The test passes:
[acme@zoo linux]$ make -C tools/perf -f tests/make tarpkg && echo Ok
make: Entering directory '/home/git/linux/tools/perf'
- tarpkg: ./tests/perf-targz-src-pkg .
make: Leaving directory '/home/git/linux/tools/perf'
Ok
[acme@zoo linux]$
Merging these changes with this changeset to continue testing...
Also force pushing it to the tmp.perf/pt branch.
- Arnaldo
> [acme@zoo linux]$ make help | grep perf
> perf-tar-src-pkg - Build perf-4.1.0-rc5.tar source tarball
> perf-targz-src-pkg - Build perf-4.1.0-rc5.tar.gz source tarball
> perf-tarbz2-src-pkg - Build perf-4.1.0-rc5.tar.bz2 source tarball
> perf-tarxz-src-pkg - Build perf-4.1.0-rc5.tar.xz source tarball
> [acme@zoo linux]$
>
> Continue to work, in fact, there is a test for that, that will run
> when you do the build tests:
>
> make -C tools/perf build-test
>
> It is one of the last to be tested, so you may want to do it directly:
>
> [acme@zoo linux]$ make -C tools/perf -f tests/make tarpkg
> make: Entering directory '/home/git/linux/tools/perf'
> - tarpkg: ./tests/perf-targz-src-pkg .
> make: Leaving directory '/home/git/linux/tools/perf'
> [acme@zoo linux]$
>
> After I apply this patch, I get:
>
> Applying: perf tools: Add Intel PT instruction decoder
> [tmp.perf/pt 1ab14c4be64b] perf tools: Add Intel PT instruction decoder
> Author: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> Date: Fri May 29 16:33:33 2015 +0300
> 6 files changed, 339 insertions(+), 3 deletions(-)
> rewrite tools/perf/util/intel-pt-decoder/Build (100%)
> create mode 100644 tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
> create mode 100644 tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h
> [acme@zoo linux]$ fg
> bash: fg: current: no such job
> [acme@zoo linux]$ make -C tools/perf -f tests/make tarpkg
> make: Entering directory '/home/git/linux/tools/perf'
> - tarpkg: ./tests/perf-targz-src-pkg .
> tests/make:224: recipe for target 'tarpkg' failed
> make: *** [tarpkg] Error 2
> make: Leaving directory '/home/git/linux/tools/perf'
> [acme@zoo linux]$
>
> Doing it manually to see what happened:
>
> [acme@zoo linux]$ make perf-tar-src-pkg
> TAR
> [acme@zoo linux]$ ls -la perf-4.1.0-rc5.tar
> -rw-rw-r--. 1 acme acme 5027840 Jun 18 19:24 perf-4.1.0-rc5.tar
> [acme@zoo linux]$ mv perf-4.1.0-rc5.tar /tmp
> [acme@zoo linux]$ cd /tmp
> [acme@zoo tmp]$ tar xf perf-4.1.0-rc5.tar
> [acme@zoo tmp]$ cd perf-4.1.0-rc5/
> [acme@zoo perf-4.1.0-rc5]$ make -C tools/perf
> make: Entering directory '/tmp/perf-4.1.0-rc5/tools/perf'
> BUILD: Doing 'make -j4' parallel build
>
> Auto-detecting system features:
> ... dwarf: [ on ]
> ... glibc: [ on ]
> ... gtk2: [ on ]
> ... libaudit: [ on ]
> ... libbfd: [ on ]
> ... libelf: [ on ]
> ... libnuma: [ on ]
> ... libperl: [ on ]
> ... libpython: [ on ]
> ... libslang: [ on ]
> ... libunwind: [ on ]
> ... libdw-dwarf-unwind: [ on ]
> ... zlib: [ on ]
> ... lzma: [ on ]
>
> CC util/abspath.o
> CC fd/array.o
> PERF_VERSION = 4.1.rc5.g1ab14c
> CC fs/fs.o
> CC event-parse.o
> LD fd/libapi-in.o
> CC event-plugin.o
> CC fs/debugfs.o
> CC util/alias.o
> CC trace-seq.o
> <SNIP>
> CC util/cloexec.o
> CC util/thread-stack.o
> CC builtin-kmem.o
> CC builtin-lock.o
> CC util/auxtrace.o
> CC util/intel-pt-decoder/intel-pt-pkt-decoder.o
> make[4]: *** No rule to make target '../../arch/x86/tools/gen-insn-attr-x86.awk', needed by 'util/intel-pt-decoder/inat-tables.c'. Stop.
> make[4]: *** Waiting for unfinished jobs....
> GEN util/intel-pt-decoder/inat.c
> cp: cannot stat â../../arch/x86/lib/inat.câ: No such file or directory
> util/intel-pt-decoder/Build:10: recipe for target 'util/intel-pt-decoder/inat.c' failed
> make[4]: *** [util/intel-pt-decoder/inat.c] Error 1
> /tmp/perf-4.1.0-rc5/tools/build/Makefile.build:109: recipe for target 'intel-pt-decoder' failed
> make[3]: *** [intel-pt-decoder] Error 2
> make[3]: *** Waiting for unfinished jobs....
> CC builtin-kvm.o
> CC builtin-inject.o
> /tmp/perf-4.1.0-rc5/tools/build/Makefile.build:109: recipe for target 'util' failed
> make[2]: *** [util] Error 2
> Makefile.perf:380: recipe for target 'libperf-in.o' failed
> make[1]: *** [libperf-in.o] Error 2
> make[1]: *** Waiting for unfinished jobs....
> CC builtin-mem.o
> CC builtin-data.o
> CC builtin-trace.o
> <SNIP>
> LD tests/perf-in.o
> LD perf-in.o
> Makefile:68: recipe for target 'all' failed
> make: *** [all] Error 2
> make: Leaving directory '/tmp/perf-4.1.0-rc5/tools/perf'
> [acme@zoo perf-4.1.0-rc5]$
>
> The patch fixed up wrt some recent changes to .gitignore and the
> makefiles is in my git tree at git.kernel.org, branch tmp.perf/pt.
>
> Calling it a day, will continue on this tomorrow.
>
> - Arnaldo
>
> > This essentially provides intel_pt_get_insn() which takes a binary
> > buffer, uses the kernel's x86 instruction decoder to get details
> > of the instruction and then categorizes it for consumption by
> > an Intel PT decoder.
> >
> > Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> > ---
> > tools/build/Makefile.build | 2 +
> > tools/perf/.gitignore | 2 +
> > tools/perf/Makefile.perf | 12 +-
> > tools/perf/util/intel-pt-decoder/Build | 15 +-
> > .../util/intel-pt-decoder/intel-pt-insn-decoder.c | 246 +++++++++++++++++++++
> > .../util/intel-pt-decoder/intel-pt-insn-decoder.h | 65 ++++++
> > 6 files changed, 339 insertions(+), 3 deletions(-)
> > create mode 100644 tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
> > create mode 100644 tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h
> >
> > diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build
> > index 10df572..7ad74e4 100644
> > --- a/tools/build/Makefile.build
> > +++ b/tools/build/Makefile.build
> > @@ -57,6 +57,8 @@ quiet_cmd_cc_i_c = CPP $@
> > quiet_cmd_cc_s_c = AS $@
> > cmd_cc_s_c = $(CC) $(c_flags) -S -o $@ $<
> >
> > +quiet_cmd_gen = GEN $@
> > +
> > # Link agregate command
> > # If there's nothing to link, create empty $@ object.
> > quiet_cmd_ld_multi = LD $@
> > diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
> > index 812f904..c88d5c5 100644
> > --- a/tools/perf/.gitignore
> > +++ b/tools/perf/.gitignore
> > @@ -28,3 +28,5 @@ config.mak.autogen
> > *-flex.*
> > *.pyc
> > *.pyo
> > +util/intel-pt-decoder/inat-tables.c
> > +util/intel-pt-decoder/inat.c
> > diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> > index 5816a3b..3ae3a8e 100644
> > --- a/tools/perf/Makefile.perf
> > +++ b/tools/perf/Makefile.perf
> > @@ -76,6 +76,12 @@ include config/utilities.mak
> > #
> > # Define NO_AUXTRACE if you do not want AUX area tracing support
> >
> > +# As per kernel Makefile, avoid funny character set dependencies
> > +unexport LC_ALL
> > +LC_COLLATE=C
> > +LC_NUMERIC=C
> > +export LC_COLLATE LC_NUMERIC
> > +
> > ifeq ($(srctree),)
> > srctree := $(patsubst %/,%,$(dir $(shell pwd)))
> > srctree := $(patsubst %/,%,$(dir $(srctree)))
> > @@ -122,6 +128,7 @@ INSTALL = install
> > FLEX = flex
> > BISON = bison
> > STRIP = strip
> > +AWK = awk
> >
> > LIB_DIR = $(srctree)/tools/lib/api/
> > TRACE_EVENT_DIR = $(srctree)/tools/lib/traceevent/
> > @@ -272,7 +279,7 @@ strip: $(PROGRAMS) $(OUTPUT)perf
> >
> > PERF_IN := $(OUTPUT)perf-in.o
> >
> > -export srctree OUTPUT RM CC LD AR CFLAGS V BISON FLEX
> > +export srctree OUTPUT RM CC LD AR CFLAGS V BISON FLEX AWK
> > build := -f $(srctree)/tools/build/Makefile.build dir=. obj
> >
> > $(PERF_IN): $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h FORCE
> > @@ -536,7 +543,8 @@ clean: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean config-clean
> > $(Q)find . -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
> > $(Q)$(RM) .config-detected
> > $(call QUIET_CLEAN, core-progs) $(RM) $(ALL_PROGRAMS) perf perf-read-vdso32 perf-read-vdsox32
> > - $(call QUIET_CLEAN, core-gen) $(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo $(OUTPUT)common-cmds.h TAGS tags cscope* $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)FEATURE-DUMP $(OUTPUT)util/*-bison* $(OUTPUT)util/*-flex*
> > + $(call QUIET_CLEAN, core-gen) $(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo $(OUTPUT)common-cmds.h TAGS tags cscope* $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)FEATURE-DUMP $(OUTPUT)util/*-bison* $(OUTPUT)util/*-flex* \
> > + $(OUTPUT)util/intel-pt-decoder/inat.c $(OUTPUT)util/intel-pt-decoder/inat-tables.c
> > $(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) clean
> > $(python-clean)
> >
> > diff --git a/tools/perf/util/intel-pt-decoder/Build b/tools/perf/util/intel-pt-decoder/Build
> > index 9d67381..f5f7f87 100644
> > --- a/tools/perf/util/intel-pt-decoder/Build
> > +++ b/tools/perf/util/intel-pt-decoder/Build
> > @@ -1 +1,14 @@
> > -libperf-$(CONFIG_AUXTRACE) += intel-pt-pkt-decoder.o
> > +libperf-$(CONFIG_AUXTRACE) += intel-pt-pkt-decoder.o intel-pt-insn-decoder.o
> > +
> > +inat_tables_script = ../../arch/x86/tools/gen-insn-attr-x86.awk
> > +inat_tables_maps = ../../arch/x86/lib/x86-opcode-map.txt
> > +
> > +$(OUTPUT)util/intel-pt-decoder/inat-tables.c: $(inat_tables_script) $(inat_tables_maps)
> > + @$(call echo-cmd,gen)$(AWK) -f $(inat_tables_script) $(inat_tables_maps) > $@ || rm -f $@
> > +
> > +$(OUTPUT)util/intel-pt-decoder/inat.c:
> > + @$(call echo-cmd,gen)cp ../../arch/x86/lib/inat.c $(OUTPUT)util/intel-pt-decoder/inat.c
> > +
> > +$(OUTPUT)util/intel-pt-decoder/intel-pt-insn-decoder.o: $(OUTPUT)util/intel-pt-decoder/inat.c $(OUTPUT)util/intel-pt-decoder/inat-tables.c
> > +
> > +CFLAGS_intel-pt-insn-decoder.o += -I../../arch/x86/include -I$(OUTPUT)util/intel-pt-decoder -I../../arch/x86/lib -Wno-override-init
> > diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
> > new file mode 100644
> > index 0000000..2fa82c5
> > --- /dev/null
> > +++ b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
> > @@ -0,0 +1,246 @@
> > +/*
> > + * intel_pt_insn_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>
> > +
> > +#include "event.h"
> > +
> > +#include <asm/insn.h>
> > +
> > +#include "inat.c"
> > +#include <insn.c>
> > +
> > +#include "intel-pt-insn-decoder.h"
> > +
> > +/* Based on branch_type() from perf_event_intel_lbr.c */
> > +static void intel_pt_insn_decoder(struct insn *insn,
> > + struct intel_pt_insn *intel_pt_insn)
> > +{
> > + enum intel_pt_insn_op op = INTEL_PT_OP_OTHER;
> > + enum intel_pt_insn_branch branch = INTEL_PT_BR_NO_BRANCH;
> > + int ext;
> > +
> > + if (insn_is_avx(insn)) {
> > + intel_pt_insn->op = INTEL_PT_OP_OTHER;
> > + intel_pt_insn->branch = INTEL_PT_BR_NO_BRANCH;
> > + intel_pt_insn->length = insn->length;
> > + return;
> > + }
> > +
> > + switch (insn->opcode.bytes[0]) {
> > + case 0xf:
> > + switch (insn->opcode.bytes[1]) {
> > + case 0x05: /* syscall */
> > + case 0x34: /* sysenter */
> > + op = INTEL_PT_OP_SYSCALL;
> > + branch = INTEL_PT_BR_INDIRECT;
> > + break;
> > + case 0x07: /* sysret */
> > + case 0x35: /* sysexit */
> > + op = INTEL_PT_OP_SYSRET;
> > + branch = INTEL_PT_BR_INDIRECT;
> > + break;
> > + case 0x80 ... 0x8f: /* jcc */
> > + op = INTEL_PT_OP_JCC;
> > + branch = INTEL_PT_BR_CONDITIONAL;
> > + break;
> > + default:
> > + break;
> > + }
> > + break;
> > + case 0x70 ... 0x7f: /* jcc */
> > + op = INTEL_PT_OP_JCC;
> > + branch = INTEL_PT_BR_CONDITIONAL;
> > + break;
> > + case 0xc2: /* near ret */
> > + case 0xc3: /* near ret */
> > + case 0xca: /* far ret */
> > + case 0xcb: /* far ret */
> > + op = INTEL_PT_OP_RET;
> > + branch = INTEL_PT_BR_INDIRECT;
> > + break;
> > + case 0xcf: /* iret */
> > + op = INTEL_PT_OP_IRET;
> > + branch = INTEL_PT_BR_INDIRECT;
> > + break;
> > + case 0xcc ... 0xce: /* int */
> > + op = INTEL_PT_OP_INT;
> > + branch = INTEL_PT_BR_INDIRECT;
> > + break;
> > + case 0xe8: /* call near rel */
> > + op = INTEL_PT_OP_CALL;
> > + branch = INTEL_PT_BR_UNCONDITIONAL;
> > + break;
> > + case 0x9a: /* call far absolute */
> > + op = INTEL_PT_OP_CALL;
> > + branch = INTEL_PT_BR_INDIRECT;
> > + break;
> > + case 0xe0 ... 0xe2: /* loop */
> > + op = INTEL_PT_OP_LOOP;
> > + branch = INTEL_PT_BR_CONDITIONAL;
> > + break;
> > + case 0xe3: /* jcc */
> > + op = INTEL_PT_OP_JCC;
> > + branch = INTEL_PT_BR_CONDITIONAL;
> > + break;
> > + case 0xe9: /* jmp */
> > + case 0xeb: /* jmp */
> > + op = INTEL_PT_OP_JMP;
> > + branch = INTEL_PT_BR_UNCONDITIONAL;
> > + break;
> > + case 0xea: /* far jmp */
> > + op = INTEL_PT_OP_JMP;
> > + branch = INTEL_PT_BR_INDIRECT;
> > + break;
> > + case 0xff: /* call near absolute, call far absolute ind */
> > + ext = (insn->modrm.bytes[0] >> 3) & 0x7;
> > + switch (ext) {
> > + case 2: /* near ind call */
> > + case 3: /* far ind call */
> > + op = INTEL_PT_OP_CALL;
> > + branch = INTEL_PT_BR_INDIRECT;
> > + break;
> > + case 4:
> > + case 5:
> > + op = INTEL_PT_OP_JMP;
> > + branch = INTEL_PT_BR_INDIRECT;
> > + break;
> > + default:
> > + break;
> > + }
> > + break;
> > + default:
> > + break;
> > + }
> > +
> > + intel_pt_insn->op = op;
> > + intel_pt_insn->branch = branch;
> > + intel_pt_insn->length = insn->length;
> > +
> > + if (branch == INTEL_PT_BR_CONDITIONAL ||
> > + branch == INTEL_PT_BR_UNCONDITIONAL) {
> > +#if __BYTE_ORDER == __BIG_ENDIAN
> > + switch (insn->immediate.nbytes) {
> > + case 1:
> > + intel_pt_insn->rel = insn->immediate.value;
> > + break;
> > + case 2:
> > + intel_pt_insn->rel =
> > + bswap_16((short)insn->immediate.value);
> > + break;
> > + case 4:
> > + intel_pt_insn->rel = bswap_32(insn->immediate.value);
> > + break;
> > + }
> > +#else
> > + intel_pt_insn->rel = insn->immediate.value;
> > +#endif
> > + }
> > +}
> > +
> > +int intel_pt_get_insn(const unsigned char *buf, size_t len, int x86_64,
> > + struct intel_pt_insn *intel_pt_insn)
> > +{
> > + struct insn insn;
> > +
> > + insn_init(&insn, buf, len, x86_64);
> > + insn_get_length(&insn);
> > + if (!insn_complete(&insn) || insn.length > len)
> > + return -1;
> > + intel_pt_insn_decoder(&insn, intel_pt_insn);
> > + if (insn.length < INTEL_PT_INSN_DBG_BUF_SZ)
> > + memcpy(intel_pt_insn->buf, buf, insn.length);
> > + else
> > + memcpy(intel_pt_insn->buf, buf, INTEL_PT_INSN_DBG_BUF_SZ);
> > + return 0;
> > +}
> > +
> > +const char *branch_name[] = {
> > + [INTEL_PT_OP_OTHER] = "Other",
> > + [INTEL_PT_OP_CALL] = "Call",
> > + [INTEL_PT_OP_RET] = "Ret",
> > + [INTEL_PT_OP_JCC] = "Jcc",
> > + [INTEL_PT_OP_JMP] = "Jmp",
> > + [INTEL_PT_OP_LOOP] = "Loop",
> > + [INTEL_PT_OP_IRET] = "IRet",
> > + [INTEL_PT_OP_INT] = "Int",
> > + [INTEL_PT_OP_SYSCALL] = "Syscall",
> > + [INTEL_PT_OP_SYSRET] = "Sysret",
> > +};
> > +
> > +const char *intel_pt_insn_name(enum intel_pt_insn_op op)
> > +{
> > + return branch_name[op];
> > +}
> > +
> > +int intel_pt_insn_desc(const struct intel_pt_insn *intel_pt_insn, char *buf,
> > + size_t buf_len)
> > +{
> > + switch (intel_pt_insn->branch) {
> > + case INTEL_PT_BR_CONDITIONAL:
> > + case INTEL_PT_BR_UNCONDITIONAL:
> > + return snprintf(buf, buf_len, "%s %s%d",
> > + intel_pt_insn_name(intel_pt_insn->op),
> > + intel_pt_insn->rel > 0 ? "+" : "",
> > + intel_pt_insn->rel);
> > + case INTEL_PT_BR_NO_BRANCH:
> > + case INTEL_PT_BR_INDIRECT:
> > + return snprintf(buf, buf_len, "%s",
> > + intel_pt_insn_name(intel_pt_insn->op));
> > + default:
> > + break;
> > + }
> > + return 0;
> > +}
> > +
> > +size_t intel_pt_insn_max_size(void)
> > +{
> > + return MAX_INSN_SIZE;
> > +}
> > +
> > +int intel_pt_insn_type(enum intel_pt_insn_op op)
> > +{
> > + switch (op) {
> > + case INTEL_PT_OP_OTHER:
> > + return 0;
> > + case INTEL_PT_OP_CALL:
> > + return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL;
> > + case INTEL_PT_OP_RET:
> > + return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN;
> > + case INTEL_PT_OP_JCC:
> > + return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL;
> > + case INTEL_PT_OP_JMP:
> > + return PERF_IP_FLAG_BRANCH;
> > + case INTEL_PT_OP_LOOP:
> > + return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL;
> > + case INTEL_PT_OP_IRET:
> > + return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN |
> > + PERF_IP_FLAG_INTERRUPT;
> > + case INTEL_PT_OP_INT:
> > + return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
> > + PERF_IP_FLAG_INTERRUPT;
> > + case INTEL_PT_OP_SYSCALL:
> > + return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
> > + PERF_IP_FLAG_SYSCALLRET;
> > + case INTEL_PT_OP_SYSRET:
> > + return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN |
> > + PERF_IP_FLAG_SYSCALLRET;
> > + default:
> > + return 0;
> > + }
> > +}
> > diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h
> > new file mode 100644
> > index 0000000..b0adbf3
> > --- /dev/null
> > +++ b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h
> > @@ -0,0 +1,65 @@
> > +/*
> > + * intel_pt_insn_decoder.h: 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.
> > + *
> > + */
> > +
> > +#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_DBG_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,
> > +};
> > +
> > +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;
> > + int length;
> > + int32_t rel;
> > + unsigned char buf[INTEL_PT_INSN_DBG_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);
> > +
> > +size_t intel_pt_insn_max_size(void);
> > +
> > +int intel_pt_insn_type(enum intel_pt_insn_op op);
> > +
> > +#endif
> > --
> > 1.9.1
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