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From 3bc373152a3a00742750dbbe974d541af78231e6 Mon Sep 17 00:00:00 2001
From: Andres Freund <andres@anarazel.de>
Date: Sun, 31 Jul 2022 18:38:30 -0700
Subject: [PATCH 3/5] tools perf: Fix compilation error with new binutils
binutils changed the signature of init_disassemble_info(), which now causes
compilation failures for tools/perf/util/annotate.c, e.g. on debian
unstable.
Relevant binutils commit:
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=60a3da00bd5407f07
Wire up the feature test and switch to init_disassemble_info_compat(),
which were introduced in prior commits, fixing the compilation failure.
I verified that perf can still disassemble bpf programs by using bpftrace
under load, recording a perf trace, and then annotating the bpf "function"
with and without the changes. With old binutils there's no change in output
before/after this patch. When comparing the output from old binutils (2.35)
to new bintuils with the patch (upstream snapshot) there are a few output
differences, but they are unrelated to this patch. An example hunk is:
1.15 : 55:mov %rbp,%rdx
0.00 : 58:add $0xfffffffffffffff8,%rdx
0.00 : 5c:xor %ecx,%ecx
- 1.03 : 5e:callq 0xffffffffe12aca3c
+ 1.03 : 5e:call 0xffffffffe12aca3c
0.00 : 63:xor %eax,%eax
- 2.18 : 65:leaveq
- 2.82 : 66:retq
+ 2.18 : 65:leave
+ 2.82 : 66:ret
Signed-off-by: Andres Freund <andres@anarazel.de>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Ben Hutchings <benh@debian.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: bpf@vger.kernel.org
Link: http://lore.kernel.org/lkml/20220622181918.ykrs5rsnmx3og4sv@alap3.anarazel.de
Link: https://lore.kernel.org/r/20220801013834.156015-5-andres@anarazel.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
(cherry picked from commit 83aa0120487e8bc3f231e72c460add783f71f17c)
---
tools/perf/Makefile.config | 8 ++++++++
tools/perf/util/annotate.c | 7 ++++---
2 files changed, 12 insertions(+), 3 deletions(-)
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -296,6 +296,7 @@ FEATURE_CHECK_LDFLAGS-libpython := $(PYT
FEATURE_CHECK_LDFLAGS-libaio = -lrt
FEATURE_CHECK_LDFLAGS-disassembler-four-args = -lbfd -lopcodes -ldl
+FEATURE_CHECK_LDFLAGS-disassembler-init-styled = -lbfd -lopcodes -ldl
CORE_CFLAGS += -fno-omit-frame-pointer
CORE_CFLAGS += -ggdb3
@@ -872,13 +873,16 @@ ifndef NO_LIBBFD
ifeq ($(feature-libbfd-liberty), 1)
EXTLIBS += -lbfd -lopcodes -liberty
FEATURE_CHECK_LDFLAGS-disassembler-four-args += -liberty -ldl
+ FEATURE_CHECK_LDFLAGS-disassembler-init-styled += -liberty -ldl
else
ifeq ($(feature-libbfd-liberty-z), 1)
EXTLIBS += -lbfd -lopcodes -liberty -lz
FEATURE_CHECK_LDFLAGS-disassembler-four-args += -liberty -lz -ldl
+ FEATURE_CHECK_LDFLAGS-disassembler-init-styled += -liberty -lz -ldl
endif
endif
$(call feature_check,disassembler-four-args)
+ $(call feature_check,disassembler-init-styled)
endif
ifeq ($(feature-libbfd-buildid), 1)
@@ -992,6 +996,10 @@ ifeq ($(feature-disassembler-four-args),
CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
endif
+ifeq ($(feature-disassembler-init-styled), 1)
+ CFLAGS += -DDISASM_INIT_STYLED
+endif
+
ifeq (${IS_64_BIT}, 1)
ifndef NO_PERF_READ_VDSO32
$(call feature_check,compile-32)
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1694,6 +1694,7 @@ fallback:
#include <bpf/btf.h>
#include <bpf/libbpf.h>
#include <linux/btf.h>
+#include <tools/dis-asm-compat.h>
static int symbol__disassemble_bpf(struct symbol *sym,
struct annotate_args *args)
@@ -1736,9 +1737,9 @@ static int symbol__disassemble_bpf(struc
ret = errno;
goto out;
}
- init_disassemble_info(&info, s,
- (fprintf_ftype) fprintf);
-
+ init_disassemble_info_compat(&info, s,
+ (fprintf_ftype) fprintf,
+ fprintf_styled);
info.arch = bfd_get_arch(bfdf);
info.mach = bfd_get_mach(bfdf);
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