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Commit 8e2ff72a authored by Ravi Bangoria's avatar Ravi Bangoria Committed by Arnaldo Carvalho de Melo
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perf powerpc: Generate system call table from asm/unistd.h 



This should speed up accessing new system calls introduced with the
kernel rather than waiting for libaudit updates to include them.

Signed-off-by: default avatarRavi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/20180129083417.31240-3-ravi.bangoria@linux.vnet.ibm.com


[ Made it generate syscall_32.c as well to fix the build on 32-bit ppc ]
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 1350fb7d

tools/perf/arch/powerpc/Makefile

+25 −0
Original line number Diff line number Diff line
@@ -6,3 +6,28 @@ endif 
HAVE_KVM_STAT_SUPPORT := 1

PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1

PERF_HAVE_JITDUMP := 1



#

# Syscall table generation for perf

#



out    := $(OUTPUT)arch/powerpc/include/generated/asm

header32 := $(out)/syscalls_32.c

header64 := $(out)/syscalls_64.c

sysdef := $(srctree)/tools/arch/powerpc/include/uapi/asm/unistd.h

sysprf := $(srctree)/tools/perf/arch/powerpc/entry/syscalls/

systbl := $(sysprf)/mksyscalltbl



# Create output directory if not already present

_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)')



$(header64): $(sysdef) $(systbl)

	$(Q)$(SHELL) '$(systbl)' '64' '$(CC)' $(sysdef) > $@



$(header32): $(sysdef) $(systbl)

	$(Q)$(SHELL) '$(systbl)' '32' '$(CC)' $(sysdef) > $@



clean::

	$(call QUIET_CLEAN, powerpc) $(RM) $(header32) $(header64)



archheaders: $(header32) $(header64)

tools/perf/arch/powerpc/entry/syscalls/mksyscalltbl

0 → 100755
+37 −0
Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

#

# Generate system call table for perf. Derived from

# s390 script.

#

# Copyright IBM Corp. 2017

# Author(s):  Hendrik Brueckner <brueckner@linux.vnet.ibm.com>

# Changed by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>



wordsize=$1

gcc=$2

input=$3



if ! test -r $input; then

	echo "Could not read input file" >&2

	exit 1

fi



create_table()

{

	local wordsize=$1

	local max_nr



	echo "static const char *syscalltbl_powerpc_${wordsize}[] = {"

	while read sc nr; do

		printf '\t[%d] = "%s",\n' $nr $sc

		max_nr=$nr

	done

	echo '};'

	echo "#define SYSCALLTBL_POWERPC_${wordsize}_MAX_ID $max_nr"

}



$gcc -m${wordsize} -E -dM -x c  $input	       \

	|sed -ne 's/^#define __NR_//p' \

	|sort -t' ' -k2 -nu	       \

	|create_table ${wordsize}