Commit 164a747f authored Dec 07, 2017 by Hendrik Brueckner Committed by Arnaldo Carvalho de Melo Dec 27, 2017

perf s390: 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.

Committer testing:

  $ rm -rf /tmp/build/perf
  $ mkdir /tmp/build/perf
  $ make srctree=/home/acme/git/perf -C tools/perf/arch/s390 OUTPUT=/tmp/build/perf/ archheaders
  make: Entering directory '/home/acme/git/perf/tools/perf/arch/s390'
  /bin/sh '/home/acme/git/perf/tools/perf/arch/s390/entry/syscalls//mksyscalltbl' 'cc' /home/acme/git/perf/tools/arch/s390/include/uapi/asm/unistd.h > /tmp/build/perf/arch/s390/include/generated/asm/syscalls_64.c
  make: Leaving directory '/home/acme/git/perf/tools/perf/arch/s390'
  $ head -5 /tmp/build/perf/arch/s390/include/generated/asm/syscalls_64.c
  static const char *syscalltbl_s390_64[] = {
	[1] = "exit",
	[2] = "fork",
	[3] = "read",
	[4] = "write",
  $ tail -5 /tmp/build/perf/arch/s390/include/generated/asm/syscalls_64.c
	[378] = "s390_guarded_storage",
	[379] = "statx",
	[380] = "s390_sthyi",
  };
  #define SYSCALLTBL_S390_64_MAX_ID 380
  $

Now to plug this into 'perf trace' proper.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: linux-s390@vger.kernel.org
LPU-Reference: 1512635281-20733-2-git-send-email-brueckner@linux.vnet.ibm.com
Link: https://lkml.kernel.org/n/tip-h5km60rdg3rqxvsys85q50l3@git.kernel.org


[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 7af7919f

tools/perf/arch/s390/Makefile

+21 −0

Original line number	Diff line number	Diff line
		@@ -3,3 +3,24 @@ PERF_HAVE_DWARF_REGS := 1
		endif
		HAVE_KVM_STAT_SUPPORT := 1
		PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1

		#
		# Syscall table generation for perf
		#

		out := $(OUTPUT)arch/s390/include/generated/asm
		header := $(out)/syscalls_64.c
		sysdef := $(srctree)/tools/arch/s390/include/uapi/asm/unistd.h
		sysprf := $(srctree)/tools/perf/arch/s390/entry/syscalls/
		systbl := $(sysprf)/mksyscalltbl

		# Create output directory if not already present
		_dummy := $(shell [ -d '$(out)' ] \|\| mkdir -p '$(out)')

		$(header): $(sysdef) $(systbl)
		$(Q)$(SHELL) '$(systbl)' '$(CC)' $(sysdef) > $@

		clean::
		$(call QUIET_CLEAN, s390) $(RM) $(header)

		archheaders: $(header)

tools/perf/arch/s390/entry/syscalls/mksyscalltbl

0 → 100755

+36 −0

Original line number	Diff line number	Diff line
		#!/bin/sh
		# SPDX-License-Identifier: GPL-2.0
		#
		# Generate system call table for perf
		#
		#
		# Copyright IBM Corp. 2017
		# Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
		#

		gcc=$1
		input=$2

		if ! test -r $input; then
		echo "Could not read input file" >&2
		exit 1
		fi

		create_table()
		{
		local max_nr

		echo 'static const char *syscalltbl_s390_64[] = {'
		while read sc nr; do
		printf '\t[%d] = "%s",\n' $nr $sc
		max_nr=$nr
		done
		echo '};'
		echo "#define SYSCALLTBL_S390_64_MAX_ID $max_nr"
		}


		$gcc -m64 -E -dM -x c $input \
		\|sed -ne 's/^#define __NR_//p' \
		\|sort -t' ' -k2 -nu \
		\|create_table

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