mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-10 03:20:30 +01:00
Adrian Hunter
3a9d772314
perf tools has a copy of the x86 instruction decoder used by the kernel. The expectation is that the copy will be kept more-or-less in-synch with the kernel version. Consequently it is helpful to know if there are differences. This patch adds a check into the perf tools build so that a diff is done on the sources, and a warning is printed if they are different. Note that the warning is not fatal and the build continues as normal. The check is done as part of building the instruction decoder, so, like a compiler warning, it is not seen unless the instruction decoder has to be re-compiled. e.g. $ make -C tools/perf >/dev/null $ echo "/* blah */" >> tools/perf/util/intel-pt-decoder/inat_types.h $ make -C tools/perf >/dev/null Warning: Intel PT: x86 instruction decoder differs from kernel $ make -C tools/perf >/dev/null $ Signed-off-by: Adrian Hunter <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Acked-by: Masami Hiramatsu <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Qiaowei Ren <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
24 lines
1.6 KiB
Python
24 lines
1.6 KiB
Python
libperf-$(CONFIG_AUXTRACE) += intel-pt-pkt-decoder.o intel-pt-insn-decoder.o intel-pt-log.o intel-pt-decoder.o
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inat_tables_script = util/intel-pt-decoder/gen-insn-attr-x86.awk
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inat_tables_maps = util/intel-pt-decoder/x86-opcode-map.txt
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$(OUTPUT)util/intel-pt-decoder/inat-tables.c: $(inat_tables_script) $(inat_tables_maps)
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$(call rule_mkdir)
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@$(call echo-cmd,gen)$(AWK) -f $(inat_tables_script) $(inat_tables_maps) > $@ || rm -f $@
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$(OUTPUT)util/intel-pt-decoder/intel-pt-insn-decoder.o: util/intel-pt-decoder/intel-pt-insn-decoder.c util/intel-pt-decoder/inat.c $(OUTPUT)util/intel-pt-decoder/inat-tables.c
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@(test -d ../../kernel -a -d ../../tools -a -d ../perf && (( \
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diff -B -I'^#include' util/intel-pt-decoder/insn.c ../../arch/x86/lib/insn.c >/dev/null && \
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diff -B -I'^#include' util/intel-pt-decoder/inat.c ../../arch/x86/lib/inat.c >/dev/null && \
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diff -B util/intel-pt-decoder/x86-opcode-map.txt ../../arch/x86/lib/x86-opcode-map.txt >/dev/null && \
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diff -B util/intel-pt-decoder/gen-insn-attr-x86.awk ../../arch/x86/tools/gen-insn-attr-x86.awk >/dev/null && \
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diff -B -I'^#include' util/intel-pt-decoder/insn.h ../../arch/x86/include/asm/insn.h >/dev/null && \
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diff -B -I'^#include' util/intel-pt-decoder/inat.h ../../arch/x86/include/asm/inat.h >/dev/null && \
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diff -B -I'^#include' util/intel-pt-decoder/inat_types.h ../../arch/x86/include/asm/inat_types.h >/dev/null) \
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|| echo "Warning: Intel PT: x86 instruction decoder differs from kernel" >&2 )) || true
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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CFLAGS_intel-pt-insn-decoder.o += -I$(OUTPUT)util/intel-pt-decoder -Wno-override-init
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