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linux/tools/perf/util
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Josh Poimboeuf 19072f23d1 x86/asm/decoder: Use explicitly signed chars 
When running objtool on a ppc64le host to analyze x86 binaries, it
reports a lot of false warnings like:

  ipc/compat_mq.o: warning: objtool: compat_SyS_mq_open()+0x91: can't find jump dest instruction at .text+0x3a5

The warnings are caused by the x86 instruction decoder setting the wrong
value for the jump instruction's immediate field because it assumes that
"char == signed char", which isn't true for all architectures.  When
converting char to int, gcc sign-extends on x86 but doesn't sign-extend
on ppc64le.

According to the gcc man page, that's a feature, not a bug:

  > Each kind of machine has a default for what "char" should be.  It is
  > either like "unsigned char" by default or like "signed char" by
  > default.
  >
  > Ideally, a portable program should always use "signed char" or
  > "unsigned char" when it depends on the signedness of an object.

Conform to the "standards" by changing the "char" casts to "signed
char".  This results in no actual changes to the object code on x86.

Note: the x86 decoder now lives in three different locations in the
kernel tree, which are all kept in sync via makefile checks and
warnings: in-kernel, perf, and objtool.  This fixes all three locations.
Eventually we should probably try to at least converge the two separate
"tools" locations into a single shared location.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/9dd4161719b20e6def9564646d68bfbe498c549f.1456962210.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-03 16:13:00 +01:00
..
include tools lib: Move bitmap.[ch] from tools/perf/ to tools/{lib,include}/ 2016-01-08 12:35:46 -03:00
intel-pt-decoder x86/asm/decoder: Use explicitly signed chars 2016-03-03 16:13:00 +01:00
scripting-engines perf script: Add python support for stat events 2016-01-06 20:11:16 -03:00
abspath.c
alias.c
annotate.c perf annotate: ARM support 2015-12-07 18:13:00 -03:00
annotate.h perf annotate: Fix sizeof_sym_hist overflow issue 2015-10-05 16:15:38 -03:00
auxtrace.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
auxtrace.h perf auxtrace: Add option to synthesize branch stacks on samples 2015-09-28 16:53:44 -03:00
bpf-loader.c perf bpf: Rename bpf config to program config 2015-11-27 22:00:46 -03:00
bpf-loader.h perf bpf: Rename bpf config to program config 2015-11-27 22:00:46 -03:00
bpf-prologue.c perf bpf: Add prologue for BPF programs for fetching arguments 2015-11-18 17:51:04 -03:00
bpf-prologue.h perf bpf: Add prologue for BPF programs for fetching arguments 2015-11-18 17:51:04 -03:00
Build tools lib: Move bitmap.[ch] from tools/perf/ to tools/{lib,include}/ 2016-01-08 12:35:46 -03:00
build-id.c perf buildid-list: Show running kernel build id fix 2015-11-27 12:24:46 -03:00
build-id.h perf buildid: Introduce sysfs/filename__sprintf_build_id 2015-08-28 14:53:50 -03:00
cache.h perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
callchain.c perf top: Decay periods in callchains 2016-01-08 12:37:51 -03:00
callchain.h perf top: Decay periods in callchains 2016-01-08 12:37:51 -03:00
cgroup.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
cgroup.h perf cgroup: Use atomic.h for refcounting 2015-05-15 16:12:20 -03:00
cloexec.c perf bench numa: Fix to show proper convergence stats 2015-06-25 12:28:35 -03:00
cloexec.h perf tools: Fix build errors with mipsel-linux-uclibc compiler 2015-08-05 16:56:16 -03:00
color.c perf tools: Remove unused pager_use_color variable 2015-12-09 13:42:02 -03:00
color.h perf tools: Remove trail argument to color vsprintf 2015-08-05 16:44:02 -03:00
comm.c perf comm: Use atomic.h for refcounting 2015-05-27 12:21:43 -03:00
comm.h perf tools: Add facility to export data in database-friendly way 2014-10-29 10:32:49 -02:00
config.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
counts.c perf stat: Move perf_counts struct and functions into separate object 2015-08-08 14:16:49 -03:00
counts.h perf stat: Move perf_counts struct and functions into separate object 2015-08-08 14:16:49 -03:00
cpumap.c perf cpumap: Fix cpu conversion in cpu_map__from_entries 2016-01-06 20:11:16 -03:00
cpumap.h perf cpu_map: Add cpu_map__new_event function 2015-12-17 14:38:18 -03:00
ctype.c
data-convert-bt.c perf data: Add u32_hex data type 2015-12-11 09:12:09 -03:00
data-convert-bt.h perf data: Support using -f to override perf.data file ownership for 'convert' 2015-04-02 13:18:52 -03:00
data.c perf util: Replace strerror with strerror_r for thread-safety 2014-08-15 10:58:35 -03:00
data.h
db-export.c perf db-export: Fix thread ref-counting 2015-05-29 12:43:39 -03:00
db-export.h perf db-export: No need to have ->thread twice in struct export_sample 2015-04-02 13:18:43 -03:00
debug.c perf tools: Introduce veprintf 2015-08-06 15:30:38 -03:00
debug.h perf tools: Introduce veprintf 2015-08-06 15:30:38 -03:00
dso.c perf tools: Fix __dsos__addnew to put dso after adding it to the list 2015-11-19 13:19:20 -03:00
dso.h perf symbols: Fix dso lookup by long name and missing buildids 2015-11-13 11:14:36 -03:00
dwarf-aux.c perf probe: Fix to add missed brace around if block 2015-08-13 14:51:26 -03:00
dwarf-aux.h perf probe: Ignore tail calls to probed functions 2015-05-14 10:05:09 -03:00
env.c perf tools: Save cmdline arguments earlier 2015-12-09 13:42:03 -03:00
env.h perf env: Introduce read_cpu_topology_map() method 2015-09-14 12:50:28 -03:00
event.c perf tools: Fix mmap2 event allocation in synthesize code 2016-01-12 11:24:43 -03:00
event.h perf tools: Add event_update event cpus type 2015-12-17 15:13:38 -03:00
evlist.c perf evlist: Remove perf_evlist__(enable|disable)_event functions 2016-01-08 14:15:43 -03:00
evlist.h perf evlist: Remove perf_evlist__(enable|disable)_event functions 2016-01-08 14:15:43 -03:00
evsel.c perf evlist: Add --trace-fields option to show trace fields 2016-01-08 14:23:02 -03:00
evsel.h perf evlist: Add --trace-fields option to show trace fields 2016-01-08 14:23:02 -03:00
find-vdso-map.c perf tools: Build programs to copy 32-bit compatibility 2014-10-29 10:32:48 -02:00
generate-cmdlist.sh perf tools: Do not show trace command if it's not compiled in 2016-01-08 12:46:17 -03:00
header.c perf tools: Introduce stat perf.data header feature 2015-12-17 15:15:14 -03:00
header.h perf tools: Introduce stat perf.data header feature 2015-12-17 15:15:14 -03:00
help-unknown-cmd.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
help-unknown-cmd.h perf tools: Move help_unknown_cmd() to its own file 2015-12-14 12:30:37 -03:00
hist.c perf hists: Fix HISTC_MEM_DCACHELINE width setting 2016-01-26 11:14:55 -03:00
hist.h perf hists: Export a couple of hist functions 2016-01-08 12:59:48 -03:00
intel-bts.c perf tools: Fix use of wrong event when processing exit events 2015-09-02 17:46:26 -03:00
intel-bts.h perf tools: Add Intel BTS support 2015-08-21 11:34:10 -03:00
intel-pt.c perf tools: Fix thread lifetime related segfaut in intel_pt 2016-02-02 12:51:11 -03:00
intel-pt.h perf tools: Pass Intel PT information for decoding MTC and CYC 2015-08-24 17:46:43 -03:00
intlist.c
intlist.h
kvm-stat.h perf kvm: Support using -f to override perf.data.guest file ownership 2015-04-02 13:18:47 -03:00
levenshtein.c
levenshtein.h
llvm-utils.c perf tools: Make fetch_kernel_version() publicly available 2015-11-06 15:57:18 -03:00
llvm-utils.h perf tests: Add LLVM test for eBPF on-the-fly compiling 2015-08-07 10:57:24 -03:00
lzma.c perf tools: Add lzma decompression support for kernel module 2015-03-21 14:53:40 -03:00
machine.c perf thread: Fix reference count initial state 2015-12-14 12:08:55 -03:00
machine.h perf machine: Add method for common kernel_map(FUNCTION) operation 2015-09-30 18:34:29 -03:00
map.c perf tools: Fix maps__fixup_overlappings to put used maps 2015-12-09 13:42:00 -03:00
map.h perf maps: Introduce maps__find_symbol_by_name() 2015-09-30 18:34:25 -03:00
ordered-events.c perf ordered_events: Clear the progress bar at the end of a flush 2015-08-24 17:16:22 -03:00
ordered-events.h perf ordered_samples: Remove references to perf_{evlist,tool} and machines 2015-03-31 17:52:32 -03:00
parse-branch-options.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
parse-branch-options.h perf tools: Move branch option parsing to own file 2015-05-27 21:02:17 -03:00
parse-events.c perf tools: tracepoint_error() can receive e=NULL, robustify it 2016-02-01 11:51:15 -03:00
parse-events.h perf tools: Compile scriptlets to BPF objects when passing '.c' to --event 2015-10-29 17:16:23 -03:00
parse-events.l perf tools: Compile scriptlets to BPF objects when passing '.c' to --event 2015-10-29 17:16:23 -03:00
parse-events.y perf tools: Compile scriptlets to BPF objects when passing '.c' to --event 2015-10-29 17:16:23 -03:00
parse-regs-options.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
parse-regs-options.h perf record: Add ability to name registers to record 2015-08-31 18:01:33 -03:00
path.c perf tools: Move strlcpy() from perf to tools/lib/string.c 2015-12-16 16:09:39 -03:00
PERF-VERSION-GEN
perf_regs.c perf tools: Fix build break on powerpc due to sample_reg_masks 2015-09-30 18:34:27 -03:00
perf_regs.h perf tools: Fix build break on powerpc due to sample_reg_masks 2015-09-30 18:34:27 -03:00
pmu.c perf pmu: fix alias->snapshot missing initialization bug 2016-01-06 20:11:16 -03:00
pmu.h perf tools: Add perf_pmu__format_bits() 2015-08-06 16:49:01 -03:00
pmu.l
pmu.y
probe-event.c perf bpf: Allow BPF program config probing options 2015-11-18 17:51:04 -03:00
probe-event.h perf probe: Export init/exit_probe_symbol_maps() 2015-09-15 09:48:32 -03:00
probe-file.c perf probe: Verify parameters in two functions 2015-11-11 18:41:32 -03:00
probe-file.h perf probe: Print deleted events in cmd_probe() 2015-09-04 12:43:44 -03:00
probe-finder.c perf probe: Search both .eh_frame and .debug_frame sections for probe location 2016-02-02 13:30:16 -03:00
probe-finder.h perf probe: Search both .eh_frame and .debug_frame sections for probe location 2016-02-02 13:30:16 -03:00
pstack.c perf tools: Introduce pstack_peek() 2015-05-05 18:13:22 -03:00
pstack.h perf tools: Introduce pstack_peek() 2015-05-05 18:13:22 -03:00
python-ext-sources tools lib: Move bitmap.[ch] from tools/perf/ to tools/{lib,include}/ 2016-01-08 12:35:46 -03:00
python.c perf python: Support the PERF_RECORD_SWITCH event 2015-10-07 19:41:50 -03:00
quote.c
quote.h
rblist.c
rblist.h
record.c perf tools: Add a helper function to probe whether cpu-wide tracing is possible 2015-08-17 11:08:37 -03:00
session.c perf kvm record/report: 'unprocessable sample' error while recording/reporting guest data 2016-01-15 16:31:58 -03:00
session.h perf tools: Make perf_session__register_idle_thread drop the refcount 2015-12-10 16:28:58 -03:00
setup.py tools lib api: Rename libapikfs.a to libapi.a 2015-02-12 17:55:18 -03:00
sort.c perf tools: Add overhead/overhead_children keys defaults via string 2016-01-08 12:58:58 -03:00
sort.h perf tools: Remove list entry from struct sort_entry 2016-01-08 12:58:04 -03:00
srcline.c perf tools: Always use non inlined file name for 'srcfile' sort key 2015-09-02 16:30:46 -03:00
stat-shadow.c perf stat: Move sw clock metrics printout to stat-shadow 2015-11-04 15:11:41 -03:00
stat.c perf stat: Fix interval output values 2016-02-03 19:39:52 -03:00
stat.h perf tools: Add stat events fprintf functions 2015-12-17 15:09:38 -03:00
strbuf.c perf tools: Introduce usage_with_options_msg() 2015-10-27 09:28:44 -03:00
strbuf.h perf tools: Introduce usage_with_options_msg() 2015-10-27 09:28:44 -03:00
strfilter.c perf tools: Add strfilter__string to recover rules string 2015-05-04 12:43:54 -03:00
strfilter.h perf tools: Add strfilter__string to recover rules string 2015-05-04 12:43:54 -03:00
string.c tools: Adopt memdup() from tools/perf, moving it to tools/lib/string.c 2015-11-18 17:51:02 -03:00
strlist.c perf tools: Add file_only config option to strlist 2016-01-12 12:42:07 -03:00
strlist.h perf tools: Add file_only config option to strlist 2016-01-12 12:42:07 -03:00
svghelper.c perf tools: Add reference counting for cpu_map object 2015-06-25 15:15:50 -03:00
svghelper.h perf timechart: Implement IO mode 2014-07-10 00:22:54 +02:00
symbol-elf.c perf symbols: Fix dso__load_sym to put dso 2015-12-10 16:29:32 -03:00
symbol-minimal.c perf symbols: Fix type error when reading a build-id 2015-10-28 10:02:00 -03:00
symbol.c perf symbols: Fix reading of build-id from vDSO 2016-01-15 16:31:58 -03:00
symbol.h perf report/top: Add --raw-trace option 2016-01-06 20:11:12 -03:00
target.c perf target: Simplify handling of strerror_r return 2015-03-24 12:08:30 -03:00
target.h
term.c perf tools: Move term functions out of util.c 2015-12-09 13:42:02 -03:00
term.h perf tools: Move term functions out of util.c 2015-12-09 13:42:02 -03:00
thread-stack.c perf tools: Ensure thread-stack is flushed 2015-06-19 16:03:33 -03:00
thread-stack.h perf tools: Ensure thread-stack is flushed 2015-06-19 16:03:33 -03:00
thread.c perf thread: Fix reference count initial state 2015-12-14 12:08:55 -03:00
thread.h perf tools: Elliminate alignment holes 2015-05-18 10:17:33 -03:00
thread_map.c perf thread_map: Add thread_map__new_event function 2015-12-17 14:38:16 -03:00
thread_map.h perf thread_map: Add thread_map__new_event function 2015-12-17 14:38:16 -03:00
tool.h perf tools: Add event_update user level event 2015-12-17 15:10:16 -03:00
top.c
top.h
trace-event-info.c tools lib api fs: Move tracing_path interface into api/fs/tracing_path.c 2015-09-04 12:00:45 -03:00
trace-event-parse.c irq_poll: make blk-iopoll available outside the block layer 2015-12-11 11:52:24 -08:00
trace-event-read.c perf tools: Stop reading the kallsyms data from perf.data 2015-07-23 22:51:11 -03:00
trace-event-scripting.c perf scripting: No need to pass thread twice to the scripting callbacks 2015-04-02 13:18:41 -03:00
trace-event.c perf evsel: Propagate error info from tp_format 2015-09-15 09:48:33 -03:00
trace-event.h perf script: Add process_stat/process_stat_interval scripting interface 2016-01-06 20:11:15 -03:00
tsc.c perf tools: Move rdtsc() function 2014-07-23 11:48:11 -03:00
tsc.h perf tools: Move rdtsc() function 2014-07-23 11:48:11 -03:00
unwind-libdw.c perf libdw: Check for mmaps also in MAP__VARIABLE tree 2016-01-08 14:16:57 -03:00
unwind-libdw.h perf callchain: Add order support for libdw DWARF unwinder 2015-11-23 18:31:13 -03:00
unwind-libunwind.c perf unwind: Check for mmaps also in MAP__VARIABLE tree 2016-01-08 14:16:34 -03:00
unwind.h perf callchains: Use thread->mg->machine 2014-10-29 10:32:46 -02:00
usage.c perf test: Suppress libtraceevent warnings 2015-10-19 14:58:10 -03:00
util.c perf tools: Fallback to srcdir/Documentation/tips.txt 2016-01-12 12:42:08 -03:00
util.h perf report: Show random usage tip on the help line 2016-01-08 13:15:46 -03:00
values.c
values.h
vdso.c perf tools: Fix lockup using 32-bit compat vdso 2015-07-07 11:05:08 -03:00
vdso.h perf machine: Fix up vdso methods names 2015-05-29 12:43:44 -03:00
wrapper.c
xyarray.c perf tools: Introduce xyarray__reset function 2015-06-16 10:34:39 -03:00
xyarray.h perf tools: Introduce xyarray__reset function 2015-06-16 10:34:39 -03:00
zlib.c perf tools: Add gzip decompression support for kernel module 2014-11-05 10:11:26 -03:00