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| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2017-12-07 11:27:59 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-12-27 18:15:50 +0300 |
| commit | 164a747f1ac2380c582988d2a4d9a9af13f8e644 (patch) | |
| tree | 55b09ea9fb9e871959d019d90a68932792c57845 /tools/perf/arch | |
| parent | 7af7919f0f4bde0cec1f546f924be81cfe50533d (diff) | |
| download | linux-164a747f1ac2380c582988d2a4d9a9af13f8e644.tar.xz | |
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>
Diffstat (limited to 'tools/perf/arch')
| -rw-r--r-- | tools/perf/arch/s390/Makefile | 21 | ||||
| -rwxr-xr-x | tools/perf/arch/s390/entry/syscalls/mksyscalltbl | 36 |
2 files changed, 57 insertions, 0 deletions
diff --git a/tools/perf/arch/s390/Makefile b/tools/perf/arch/s390/Makefile index 09ba923debe8..48228de415d0 100644 --- a/tools/perf/arch/s390/Makefile +++ b/tools/perf/arch/s390/Makefile @@ -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) diff --git a/tools/perf/arch/s390/entry/syscalls/mksyscalltbl b/tools/perf/arch/s390/entry/syscalls/mksyscalltbl new file mode 100755 index 000000000000..7fa0d0abd419 --- /dev/null +++ b/tools/perf/arch/s390/entry/syscalls/mksyscalltbl @@ -0,0 +1,36 @@ +#!/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 |